![Sakari Ailus](/assets/img/avatar_default.png)
Drop the FSF's postal address from the source code files that typically contain mostly the license text. Of the 628 removed instances, 578 are outdated. The patch has been created with the following command without manual edits: git grep -l "675 Mass Ave\|59 Temple Place\|51 Franklin St" -- \ drivers/media/ include/media|while read i; do i=$i perl -e ' open(F,"< $ENV{i}"); $a=join("", <F>); $a =~ s/[ \t]*\*\n.*You should.*\n.*along with.*\n.*(\n.*USA.*$)?\n//m && $a =~ s/(^.*)Or, (point your browser to) /$1To obtain the license, $2\n$1/m; close(F); open(F, "> $ENV{i}"); print F $a; close(F);'; done Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
420 lines
11 KiB
C
420 lines
11 KiB
C
/*
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* Linux V4L2 radio driver for the Griffin radioSHARK USB radio receiver
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*
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* Note the radioSHARK offers the audio through a regular USB audio device,
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* this driver only handles the tuning.
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*
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* The info necessary to drive the shark was taken from the small userspace
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* shark.c program by Michael Rolig, which he kindly placed in the Public
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* Domain.
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*
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* Copyright (c) 2012 Hans de Goede <hdegoede@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/leds.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/usb.h>
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#include <linux/workqueue.h>
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#include <media/v4l2-device.h>
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#include <media/drv-intf/tea575x.h>
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#if defined(CONFIG_LEDS_CLASS) || \
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(defined(CONFIG_LEDS_CLASS_MODULE) && defined(CONFIG_RADIO_SHARK_MODULE))
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#define SHARK_USE_LEDS 1
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#endif
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/*
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* Version Information
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*/
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MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
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MODULE_DESCRIPTION("Griffin radioSHARK, USB radio receiver driver");
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MODULE_LICENSE("GPL");
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#define SHARK_IN_EP 0x83
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#define SHARK_OUT_EP 0x05
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#define TEA575X_BIT_MONO (1<<22) /* 0 = stereo, 1 = mono */
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#define TEA575X_BIT_BAND_MASK (3<<20)
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#define TEA575X_BIT_BAND_FM (0<<20)
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#define TB_LEN 6
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#define DRV_NAME "radioshark"
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#define v4l2_dev_to_shark(d) container_of(d, struct shark_device, v4l2_dev)
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/* Note BLUE_IS_PULSE comes after NO_LEDS as it is a status bit, not a LED */
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enum { BLUE_LED, BLUE_PULSE_LED, RED_LED, NO_LEDS, BLUE_IS_PULSE };
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struct shark_device {
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struct usb_device *usbdev;
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struct v4l2_device v4l2_dev;
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struct snd_tea575x tea;
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#ifdef SHARK_USE_LEDS
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struct work_struct led_work;
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struct led_classdev leds[NO_LEDS];
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char led_names[NO_LEDS][32];
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atomic_t brightness[NO_LEDS];
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unsigned long brightness_new;
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#endif
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u8 *transfer_buffer;
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u32 last_val;
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};
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static atomic_t shark_instance = ATOMIC_INIT(0);
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static void shark_write_val(struct snd_tea575x *tea, u32 val)
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{
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struct shark_device *shark = tea->private_data;
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int i, res, actual_len;
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/* Avoid unnecessary (slow) USB transfers */
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if (shark->last_val == val)
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return;
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memset(shark->transfer_buffer, 0, TB_LEN);
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shark->transfer_buffer[0] = 0xc0; /* Write shift register command */
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for (i = 0; i < 4; i++)
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shark->transfer_buffer[i] |= (val >> (24 - i * 8)) & 0xff;
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res = usb_interrupt_msg(shark->usbdev,
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usb_sndintpipe(shark->usbdev, SHARK_OUT_EP),
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shark->transfer_buffer, TB_LEN,
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&actual_len, 1000);
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if (res >= 0)
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shark->last_val = val;
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else
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v4l2_err(&shark->v4l2_dev, "set-freq error: %d\n", res);
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}
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static u32 shark_read_val(struct snd_tea575x *tea)
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{
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struct shark_device *shark = tea->private_data;
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int i, res, actual_len;
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u32 val = 0;
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memset(shark->transfer_buffer, 0, TB_LEN);
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shark->transfer_buffer[0] = 0x80;
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res = usb_interrupt_msg(shark->usbdev,
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usb_sndintpipe(shark->usbdev, SHARK_OUT_EP),
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shark->transfer_buffer, TB_LEN,
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&actual_len, 1000);
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if (res < 0) {
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v4l2_err(&shark->v4l2_dev, "request-status error: %d\n", res);
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return shark->last_val;
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}
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res = usb_interrupt_msg(shark->usbdev,
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usb_rcvintpipe(shark->usbdev, SHARK_IN_EP),
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shark->transfer_buffer, TB_LEN,
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&actual_len, 1000);
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if (res < 0) {
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v4l2_err(&shark->v4l2_dev, "get-status error: %d\n", res);
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return shark->last_val;
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}
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for (i = 0; i < 4; i++)
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val |= shark->transfer_buffer[i] << (24 - i * 8);
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shark->last_val = val;
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/*
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* The shark does not allow actually reading the stereo / mono pin :(
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* So assume that when we're tuned to an FM station and mono has not
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* been requested, that we're receiving stereo.
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*/
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if (((val & TEA575X_BIT_BAND_MASK) == TEA575X_BIT_BAND_FM) &&
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!(val & TEA575X_BIT_MONO))
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shark->tea.stereo = true;
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else
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shark->tea.stereo = false;
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return val;
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}
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static const struct snd_tea575x_ops shark_tea_ops = {
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.write_val = shark_write_val,
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.read_val = shark_read_val,
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};
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#ifdef SHARK_USE_LEDS
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static void shark_led_work(struct work_struct *work)
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{
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struct shark_device *shark =
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container_of(work, struct shark_device, led_work);
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int i, res, brightness, actual_len;
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for (i = 0; i < 3; i++) {
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if (!test_and_clear_bit(i, &shark->brightness_new))
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continue;
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brightness = atomic_read(&shark->brightness[i]);
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memset(shark->transfer_buffer, 0, TB_LEN);
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if (i != RED_LED) {
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shark->transfer_buffer[0] = 0xA0 + i;
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shark->transfer_buffer[1] = brightness;
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} else
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shark->transfer_buffer[0] = brightness ? 0xA9 : 0xA8;
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res = usb_interrupt_msg(shark->usbdev,
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usb_sndintpipe(shark->usbdev, 0x05),
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shark->transfer_buffer, TB_LEN,
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&actual_len, 1000);
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if (res < 0)
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v4l2_err(&shark->v4l2_dev, "set LED %s error: %d\n",
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shark->led_names[i], res);
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}
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}
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static void shark_led_set_blue(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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struct shark_device *shark =
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container_of(led_cdev, struct shark_device, leds[BLUE_LED]);
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atomic_set(&shark->brightness[BLUE_LED], value);
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set_bit(BLUE_LED, &shark->brightness_new);
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clear_bit(BLUE_IS_PULSE, &shark->brightness_new);
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schedule_work(&shark->led_work);
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}
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static void shark_led_set_blue_pulse(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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struct shark_device *shark = container_of(led_cdev,
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struct shark_device, leds[BLUE_PULSE_LED]);
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atomic_set(&shark->brightness[BLUE_PULSE_LED], 256 - value);
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set_bit(BLUE_PULSE_LED, &shark->brightness_new);
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set_bit(BLUE_IS_PULSE, &shark->brightness_new);
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schedule_work(&shark->led_work);
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}
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static void shark_led_set_red(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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struct shark_device *shark =
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container_of(led_cdev, struct shark_device, leds[RED_LED]);
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atomic_set(&shark->brightness[RED_LED], value);
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set_bit(RED_LED, &shark->brightness_new);
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schedule_work(&shark->led_work);
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}
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static const struct led_classdev shark_led_templates[NO_LEDS] = {
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[BLUE_LED] = {
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.name = "%s:blue:",
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.brightness = LED_OFF,
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.max_brightness = 127,
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.brightness_set = shark_led_set_blue,
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},
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[BLUE_PULSE_LED] = {
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.name = "%s:blue-pulse:",
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.brightness = LED_OFF,
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.max_brightness = 255,
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.brightness_set = shark_led_set_blue_pulse,
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},
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[RED_LED] = {
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.name = "%s:red:",
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.brightness = LED_OFF,
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.max_brightness = 1,
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.brightness_set = shark_led_set_red,
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},
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};
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static int shark_register_leds(struct shark_device *shark, struct device *dev)
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{
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int i, retval;
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atomic_set(&shark->brightness[BLUE_LED], 127);
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INIT_WORK(&shark->led_work, shark_led_work);
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for (i = 0; i < NO_LEDS; i++) {
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shark->leds[i] = shark_led_templates[i];
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snprintf(shark->led_names[i], sizeof(shark->led_names[0]),
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shark->leds[i].name, shark->v4l2_dev.name);
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shark->leds[i].name = shark->led_names[i];
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retval = led_classdev_register(dev, &shark->leds[i]);
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if (retval) {
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v4l2_err(&shark->v4l2_dev,
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"couldn't register led: %s\n",
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shark->led_names[i]);
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return retval;
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}
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}
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return 0;
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}
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static void shark_unregister_leds(struct shark_device *shark)
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{
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int i;
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for (i = 0; i < NO_LEDS; i++)
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led_classdev_unregister(&shark->leds[i]);
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cancel_work_sync(&shark->led_work);
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}
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static inline void shark_resume_leds(struct shark_device *shark)
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{
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if (test_bit(BLUE_IS_PULSE, &shark->brightness_new))
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set_bit(BLUE_PULSE_LED, &shark->brightness_new);
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else
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set_bit(BLUE_LED, &shark->brightness_new);
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set_bit(RED_LED, &shark->brightness_new);
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schedule_work(&shark->led_work);
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}
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#else
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static int shark_register_leds(struct shark_device *shark, struct device *dev)
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{
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v4l2_warn(&shark->v4l2_dev,
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"CONFIG_LEDS_CLASS not enabled, LED support disabled\n");
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return 0;
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}
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static inline void shark_unregister_leds(struct shark_device *shark) { }
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static inline void shark_resume_leds(struct shark_device *shark) { }
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#endif
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static void usb_shark_disconnect(struct usb_interface *intf)
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{
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struct v4l2_device *v4l2_dev = usb_get_intfdata(intf);
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struct shark_device *shark = v4l2_dev_to_shark(v4l2_dev);
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mutex_lock(&shark->tea.mutex);
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v4l2_device_disconnect(&shark->v4l2_dev);
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snd_tea575x_exit(&shark->tea);
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mutex_unlock(&shark->tea.mutex);
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shark_unregister_leds(shark);
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v4l2_device_put(&shark->v4l2_dev);
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}
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static void usb_shark_release(struct v4l2_device *v4l2_dev)
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{
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struct shark_device *shark = v4l2_dev_to_shark(v4l2_dev);
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v4l2_device_unregister(&shark->v4l2_dev);
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kfree(shark->transfer_buffer);
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kfree(shark);
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}
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static int usb_shark_probe(struct usb_interface *intf,
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const struct usb_device_id *id)
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{
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struct shark_device *shark;
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int retval = -ENOMEM;
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shark = kzalloc(sizeof(struct shark_device), GFP_KERNEL);
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if (!shark)
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return retval;
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shark->transfer_buffer = kmalloc(TB_LEN, GFP_KERNEL);
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if (!shark->transfer_buffer)
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goto err_alloc_buffer;
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v4l2_device_set_name(&shark->v4l2_dev, DRV_NAME, &shark_instance);
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retval = shark_register_leds(shark, &intf->dev);
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if (retval)
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goto err_reg_leds;
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shark->v4l2_dev.release = usb_shark_release;
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retval = v4l2_device_register(&intf->dev, &shark->v4l2_dev);
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if (retval) {
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v4l2_err(&shark->v4l2_dev, "couldn't register v4l2_device\n");
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goto err_reg_dev;
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}
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shark->usbdev = interface_to_usbdev(intf);
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shark->tea.v4l2_dev = &shark->v4l2_dev;
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shark->tea.private_data = shark;
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shark->tea.radio_nr = -1;
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shark->tea.ops = &shark_tea_ops;
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shark->tea.cannot_mute = true;
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shark->tea.has_am = true;
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strlcpy(shark->tea.card, "Griffin radioSHARK",
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sizeof(shark->tea.card));
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usb_make_path(shark->usbdev, shark->tea.bus_info,
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sizeof(shark->tea.bus_info));
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retval = snd_tea575x_init(&shark->tea, THIS_MODULE);
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if (retval) {
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v4l2_err(&shark->v4l2_dev, "couldn't init tea5757\n");
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goto err_init_tea;
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}
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return 0;
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err_init_tea:
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v4l2_device_unregister(&shark->v4l2_dev);
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err_reg_dev:
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shark_unregister_leds(shark);
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err_reg_leds:
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kfree(shark->transfer_buffer);
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err_alloc_buffer:
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kfree(shark);
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return retval;
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}
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#ifdef CONFIG_PM
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static int usb_shark_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_shark_resume(struct usb_interface *intf)
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{
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struct v4l2_device *v4l2_dev = usb_get_intfdata(intf);
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struct shark_device *shark = v4l2_dev_to_shark(v4l2_dev);
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mutex_lock(&shark->tea.mutex);
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snd_tea575x_set_freq(&shark->tea);
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mutex_unlock(&shark->tea.mutex);
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shark_resume_leds(shark);
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return 0;
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}
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#endif
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/* Specify the bcdDevice value, as the radioSHARK and radioSHARK2 share ids */
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static struct usb_device_id usb_shark_device_table[] = {
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{ .match_flags = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION |
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USB_DEVICE_ID_MATCH_INT_CLASS,
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.idVendor = 0x077d,
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.idProduct = 0x627a,
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.bcdDevice_lo = 0x0001,
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.bcdDevice_hi = 0x0001,
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.bInterfaceClass = 3,
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},
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{ }
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};
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MODULE_DEVICE_TABLE(usb, usb_shark_device_table);
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static struct usb_driver usb_shark_driver = {
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.name = DRV_NAME,
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.probe = usb_shark_probe,
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.disconnect = usb_shark_disconnect,
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.id_table = usb_shark_device_table,
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#ifdef CONFIG_PM
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.suspend = usb_shark_suspend,
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.resume = usb_shark_resume,
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.reset_resume = usb_shark_resume,
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#endif
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};
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module_usb_driver(usb_shark_driver);
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