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-----BEGIN PGP SIGNATURE----- iQFSBAABCAA8FiEEq68RxlopcLEwq+PEeb4+QwBBGIYFAlz8fAYeHHRvcnZhbGRz QGxpbnV4LWZvdW5kYXRpb24ub3JnAAoJEHm+PkMAQRiG1asH/3ySguxqtqL1MCBa 4/SZ37PHeWKMerfX6ZyJdgEqK3B+PWlmuLiOMNK5h2bPLzeQQQAmHU/mfKmpXqgB dHwUbG9yNnyUtTfsfRqAnCA6vpuw9Yb1oIzTCVQrgJLSWD0j7scBBvmzYqguOkto ThwigLUq3AILr8EfR4rh+GM+5Dn9OTEFAxwil9fPHQo7QoczwZxpURhScT6Co9TB DqLA3fvXbBvLs/CZy/S5vKM9hKzC+p39ApFTURvFPrelUVnythAM0dPDJg3pIn5u g+/+gDxDFa+7ANxvxO2ng1sJPDqJMeY/xmjJYlYyLpA33B7zLNk2vDHhAP06VTtr XCMhQ9s= =cb80 -----END PGP SIGNATURE----- Merge tag 'v5.2-rc4' into media/master There are some conflicts due to SPDX changes. We also have more patches being merged via media tree touching them. So, let's merge back from upstream and address those. Linux 5.2-rc4 * tag 'v5.2-rc4': (767 commits) Linux 5.2-rc4 MAINTAINERS: Karthikeyan Ramasubramanian is MIA i2c: xiic: Add max_read_len quirk lockref: Limit number of cmpxchg loop retries uaccess: add noop untagged_addr definition x86/insn-eval: Fix use-after-free access to LDT entry kbuild: use more portable 'command -v' for cc-cross-prefix s390/unwind: correct stack switching during unwind block, bfq: add weight symlink to the bfq.weight cgroup parameter cgroup: let a symlink too be created with a cftype file drm/nouveau/secboot/gp10[2467]: support newer FW to fix SEC2 failures on some boards drm/nouveau/secboot: enable loading of versioned LS PMU/SEC2 ACR msgqueue FW drm/nouveau/secboot: split out FW version-specific LS function pointers drm/nouveau/secboot: pass max supported FW version to LS load funcs drm/nouveau/core: support versioned firmware loading drm/nouveau/core: pass subdev into nvkm_firmware_get, rather than device block: free sched's request pool in blk_cleanup_queue pktgen: do not sleep with the thread lock held. net: mvpp2: Use strscpy to handle stat strings net: rds: fix memory leak in rds_ib_flush_mr_pool ... Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
457 lines
12 KiB
C
457 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Driver for the MasterKit MA901 USB FM radio. This device plugs
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* into the USB port and an analog audio input or headphones, so this thing
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* only deals with initialization, frequency setting, volume.
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*
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* Copyright (c) 2012 Alexey Klimov <klimov.linux@gmail.com>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/input.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-ioctl.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-event.h>
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#include <linux/usb.h>
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#include <linux/mutex.h>
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#define DRIVER_AUTHOR "Alexey Klimov <klimov.linux@gmail.com>"
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#define DRIVER_DESC "Masterkit MA901 USB FM radio driver"
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#define DRIVER_VERSION "0.0.1"
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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MODULE_VERSION(DRIVER_VERSION);
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#define USB_MA901_VENDOR 0x16c0
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#define USB_MA901_PRODUCT 0x05df
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/* dev_warn macro with driver name */
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#define MA901_DRIVER_NAME "radio-ma901"
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#define ma901radio_dev_warn(dev, fmt, arg...) \
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dev_warn(dev, MA901_DRIVER_NAME " - " fmt, ##arg)
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#define ma901radio_dev_err(dev, fmt, arg...) \
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dev_err(dev, MA901_DRIVER_NAME " - " fmt, ##arg)
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/* Probably USB_TIMEOUT should be modified in module parameter */
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#define BUFFER_LENGTH 8
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#define USB_TIMEOUT 500
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#define FREQ_MIN 87.5
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#define FREQ_MAX 108.0
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#define FREQ_MUL 16000
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#define MA901_VOLUME_MAX 16
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#define MA901_VOLUME_MIN 0
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/* Commands that device should understand
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* List isn't full and will be updated with implementation of new functions
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*/
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#define MA901_RADIO_SET_FREQ 0x03
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#define MA901_RADIO_SET_VOLUME 0x04
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#define MA901_RADIO_SET_MONO_STEREO 0x05
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/* Comfortable defines for ma901radio_set_stereo */
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#define MA901_WANT_STEREO 0x50
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#define MA901_WANT_MONO 0xd0
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/* module parameter */
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static int radio_nr = -1;
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module_param(radio_nr, int, 0);
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MODULE_PARM_DESC(radio_nr, "Radio file number");
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/* Data for one (physical) device */
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struct ma901radio_device {
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/* reference to USB and video device */
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struct usb_device *usbdev;
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struct usb_interface *intf;
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struct video_device vdev;
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struct v4l2_device v4l2_dev;
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struct v4l2_ctrl_handler hdl;
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u8 *buffer;
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struct mutex lock; /* buffer locking */
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int curfreq;
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u16 volume;
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int stereo;
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bool muted;
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};
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static inline struct ma901radio_device *to_ma901radio_dev(struct v4l2_device *v4l2_dev)
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{
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return container_of(v4l2_dev, struct ma901radio_device, v4l2_dev);
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}
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/* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
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static int ma901radio_set_freq(struct ma901radio_device *radio, int freq)
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{
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unsigned int freq_send = 0x300 + (freq >> 5) / 25;
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int retval;
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radio->buffer[0] = 0x0a;
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radio->buffer[1] = MA901_RADIO_SET_FREQ;
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radio->buffer[2] = ((freq_send >> 8) & 0xff) + 0x80;
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radio->buffer[3] = freq_send & 0xff;
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radio->buffer[4] = 0x00;
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radio->buffer[5] = 0x00;
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radio->buffer[6] = 0x00;
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radio->buffer[7] = 0x00;
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retval = usb_control_msg(radio->usbdev, usb_sndctrlpipe(radio->usbdev, 0),
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9, 0x21, 0x0300, 0,
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radio->buffer, BUFFER_LENGTH, USB_TIMEOUT);
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if (retval < 0)
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return retval;
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radio->curfreq = freq;
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return 0;
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}
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static int ma901radio_set_volume(struct ma901radio_device *radio, u16 vol_to_set)
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{
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int retval;
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radio->buffer[0] = 0x0a;
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radio->buffer[1] = MA901_RADIO_SET_VOLUME;
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radio->buffer[2] = 0xc2;
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radio->buffer[3] = vol_to_set + 0x20;
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radio->buffer[4] = 0x00;
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radio->buffer[5] = 0x00;
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radio->buffer[6] = 0x00;
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radio->buffer[7] = 0x00;
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retval = usb_control_msg(radio->usbdev, usb_sndctrlpipe(radio->usbdev, 0),
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9, 0x21, 0x0300, 0,
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radio->buffer, BUFFER_LENGTH, USB_TIMEOUT);
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if (retval < 0)
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return retval;
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radio->volume = vol_to_set;
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return retval;
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}
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static int ma901_set_stereo(struct ma901radio_device *radio, u8 stereo)
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{
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int retval;
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radio->buffer[0] = 0x0a;
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radio->buffer[1] = MA901_RADIO_SET_MONO_STEREO;
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radio->buffer[2] = stereo;
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radio->buffer[3] = 0x00;
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radio->buffer[4] = 0x00;
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radio->buffer[5] = 0x00;
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radio->buffer[6] = 0x00;
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radio->buffer[7] = 0x00;
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retval = usb_control_msg(radio->usbdev, usb_sndctrlpipe(radio->usbdev, 0),
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9, 0x21, 0x0300, 0,
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radio->buffer, BUFFER_LENGTH, USB_TIMEOUT);
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if (retval < 0)
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return retval;
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if (stereo == MA901_WANT_STEREO)
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radio->stereo = V4L2_TUNER_MODE_STEREO;
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else
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radio->stereo = V4L2_TUNER_MODE_MONO;
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return retval;
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}
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/* Handle unplugging the device.
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* We call video_unregister_device in any case.
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* The last function called in this procedure is
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* usb_ma901radio_device_release.
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*/
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static void usb_ma901radio_disconnect(struct usb_interface *intf)
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{
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struct ma901radio_device *radio = to_ma901radio_dev(usb_get_intfdata(intf));
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mutex_lock(&radio->lock);
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video_unregister_device(&radio->vdev);
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usb_set_intfdata(intf, NULL);
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v4l2_device_disconnect(&radio->v4l2_dev);
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mutex_unlock(&radio->lock);
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v4l2_device_put(&radio->v4l2_dev);
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}
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/* vidioc_querycap - query device capabilities */
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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 ma901radio_device *radio = video_drvdata(file);
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strscpy(v->driver, "radio-ma901", sizeof(v->driver));
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strscpy(v->card, "Masterkit MA901 USB FM Radio", sizeof(v->card));
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usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info));
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return 0;
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}
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/* vidioc_g_tuner - get tuner attributes */
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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 ma901radio_device *radio = video_drvdata(file);
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if (v->index > 0)
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return -EINVAL;
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v->signal = 0;
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/* TODO: the same words like in _probe() goes here.
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* When receiving of stats will be implemented then we can call
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* ma901radio_get_stat().
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* retval = ma901radio_get_stat(radio, &is_stereo, &v->signal);
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*/
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strscpy(v->name, "FM", sizeof(v->name));
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v->type = V4L2_TUNER_RADIO;
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v->rangelow = FREQ_MIN * FREQ_MUL;
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v->rangehigh = FREQ_MAX * FREQ_MUL;
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v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
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/* v->rxsubchans = is_stereo ? V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO; */
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v->audmode = radio->stereo ?
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V4L2_TUNER_MODE_STEREO : V4L2_TUNER_MODE_MONO;
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return 0;
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}
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/* vidioc_s_tuner - set tuner attributes */
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static int vidioc_s_tuner(struct file *file, void *priv,
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const struct v4l2_tuner *v)
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{
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struct ma901radio_device *radio = video_drvdata(file);
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if (v->index > 0)
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return -EINVAL;
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/* mono/stereo selector */
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switch (v->audmode) {
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case V4L2_TUNER_MODE_MONO:
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return ma901_set_stereo(radio, MA901_WANT_MONO);
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default:
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return ma901_set_stereo(radio, MA901_WANT_STEREO);
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}
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}
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/* vidioc_s_frequency - set tuner radio frequency */
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static int vidioc_s_frequency(struct file *file, void *priv,
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const struct v4l2_frequency *f)
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{
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struct ma901radio_device *radio = video_drvdata(file);
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if (f->tuner != 0)
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return -EINVAL;
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return ma901radio_set_freq(radio, clamp_t(unsigned, f->frequency,
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FREQ_MIN * FREQ_MUL, FREQ_MAX * FREQ_MUL));
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}
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/* vidioc_g_frequency - get tuner radio frequency */
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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 ma901radio_device *radio = video_drvdata(file);
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if (f->tuner != 0)
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return -EINVAL;
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f->frequency = radio->curfreq;
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return 0;
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}
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static int usb_ma901radio_s_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct ma901radio_device *radio =
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container_of(ctrl->handler, struct ma901radio_device, hdl);
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_VOLUME: /* set volume */
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return ma901radio_set_volume(radio, (u16)ctrl->val);
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}
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return -EINVAL;
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}
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/* TODO: Should we really need to implement suspend and resume functions?
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* Radio has it's own memory and will continue playing if power is present
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* on usb port and on resume it will start to play again based on freq, volume
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* values in device memory.
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*/
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static int usb_ma901radio_suspend(struct usb_interface *intf, pm_message_t message)
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{
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return 0;
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}
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static int usb_ma901radio_resume(struct usb_interface *intf)
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{
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return 0;
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}
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static const struct v4l2_ctrl_ops usb_ma901radio_ctrl_ops = {
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.s_ctrl = usb_ma901radio_s_ctrl,
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};
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/* File system interface */
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static const struct v4l2_file_operations usb_ma901radio_fops = {
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.owner = THIS_MODULE,
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.open = v4l2_fh_open,
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.release = v4l2_fh_release,
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.poll = v4l2_ctrl_poll,
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.unlocked_ioctl = video_ioctl2,
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};
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static const struct v4l2_ioctl_ops usb_ma901radio_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_frequency = vidioc_g_frequency,
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.vidioc_s_frequency = vidioc_s_frequency,
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.vidioc_log_status = v4l2_ctrl_log_status,
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.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
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.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
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};
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static void usb_ma901radio_release(struct v4l2_device *v4l2_dev)
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{
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struct ma901radio_device *radio = to_ma901radio_dev(v4l2_dev);
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v4l2_ctrl_handler_free(&radio->hdl);
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v4l2_device_unregister(&radio->v4l2_dev);
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kfree(radio->buffer);
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kfree(radio);
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}
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/* check if the device is present and register with v4l and usb if it is */
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static int usb_ma901radio_probe(struct usb_interface *intf,
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const struct usb_device_id *id)
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{
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struct usb_device *dev = interface_to_usbdev(intf);
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struct ma901radio_device *radio;
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int retval = 0;
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/* Masterkit MA901 usb radio has the same USB ID as many others
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* Atmel V-USB devices. Let's make additional checks to be sure
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* that this is our device.
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*/
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if (dev->product && dev->manufacturer &&
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(strncmp(dev->product, "MA901", 5) != 0
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|| strncmp(dev->manufacturer, "www.masterkit.ru", 16) != 0))
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return -ENODEV;
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radio = kzalloc(sizeof(struct ma901radio_device), GFP_KERNEL);
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if (!radio) {
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dev_err(&intf->dev, "kzalloc for ma901radio_device failed\n");
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retval = -ENOMEM;
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goto err;
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}
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radio->buffer = kmalloc(BUFFER_LENGTH, GFP_KERNEL);
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if (!radio->buffer) {
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dev_err(&intf->dev, "kmalloc for radio->buffer failed\n");
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retval = -ENOMEM;
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goto err_nobuf;
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}
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retval = v4l2_device_register(&intf->dev, &radio->v4l2_dev);
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if (retval < 0) {
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dev_err(&intf->dev, "couldn't register v4l2_device\n");
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goto err_v4l2;
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}
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v4l2_ctrl_handler_init(&radio->hdl, 1);
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/* TODO:It looks like this radio doesn't have mute/unmute control
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* and windows program just emulate it using volume control.
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* Let's plan to do the same in this driver.
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*
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* v4l2_ctrl_new_std(&radio->hdl, &usb_ma901radio_ctrl_ops,
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* V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
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*/
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v4l2_ctrl_new_std(&radio->hdl, &usb_ma901radio_ctrl_ops,
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V4L2_CID_AUDIO_VOLUME, MA901_VOLUME_MIN,
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MA901_VOLUME_MAX, 1, MA901_VOLUME_MAX);
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if (radio->hdl.error) {
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retval = radio->hdl.error;
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dev_err(&intf->dev, "couldn't register control\n");
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goto err_ctrl;
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}
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mutex_init(&radio->lock);
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radio->v4l2_dev.ctrl_handler = &radio->hdl;
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radio->v4l2_dev.release = usb_ma901radio_release;
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strscpy(radio->vdev.name, radio->v4l2_dev.name,
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sizeof(radio->vdev.name));
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radio->vdev.v4l2_dev = &radio->v4l2_dev;
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radio->vdev.fops = &usb_ma901radio_fops;
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radio->vdev.ioctl_ops = &usb_ma901radio_ioctl_ops;
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radio->vdev.release = video_device_release_empty;
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radio->vdev.lock = &radio->lock;
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radio->vdev.device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER;
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radio->usbdev = interface_to_usbdev(intf);
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radio->intf = intf;
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usb_set_intfdata(intf, &radio->v4l2_dev);
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radio->curfreq = 95.21 * FREQ_MUL;
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video_set_drvdata(&radio->vdev, radio);
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/* TODO: we can get some statistics (freq, volume) from device
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* but it's not implemented yet. After insertion in usb-port radio
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* setups frequency and starts playing without any initialization.
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* So we don't call usb_ma901radio_init/get_stat() here.
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* retval = usb_ma901radio_init(radio);
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*/
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retval = video_register_device(&radio->vdev, VFL_TYPE_RADIO,
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radio_nr);
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if (retval < 0) {
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dev_err(&intf->dev, "could not register video device\n");
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goto err_vdev;
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}
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|
|
return 0;
|
|
|
|
err_vdev:
|
|
v4l2_ctrl_handler_free(&radio->hdl);
|
|
err_ctrl:
|
|
v4l2_device_unregister(&radio->v4l2_dev);
|
|
err_v4l2:
|
|
kfree(radio->buffer);
|
|
err_nobuf:
|
|
kfree(radio);
|
|
err:
|
|
return retval;
|
|
}
|
|
|
|
/* USB Device ID List */
|
|
static const struct usb_device_id usb_ma901radio_device_table[] = {
|
|
{ USB_DEVICE_AND_INTERFACE_INFO(USB_MA901_VENDOR, USB_MA901_PRODUCT,
|
|
USB_CLASS_HID, 0, 0) },
|
|
{ } /* Terminating entry */
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(usb, usb_ma901radio_device_table);
|
|
|
|
/* USB subsystem interface */
|
|
static struct usb_driver usb_ma901radio_driver = {
|
|
.name = MA901_DRIVER_NAME,
|
|
.probe = usb_ma901radio_probe,
|
|
.disconnect = usb_ma901radio_disconnect,
|
|
.suspend = usb_ma901radio_suspend,
|
|
.resume = usb_ma901radio_resume,
|
|
.reset_resume = usb_ma901radio_resume,
|
|
.id_table = usb_ma901radio_device_table,
|
|
};
|
|
|
|
module_usb_driver(usb_ma901radio_driver);
|