@@ -41,6 +41,8 @@ source "drivers/staging/media/solo6x10/Kconfig"
source "drivers/staging/media/omap4iss/Kconfig"
+source "drivers/staging/media/rtl2832u_sdr/Kconfig"
+
# Keep LIRC at the end, as it has sub-menus
source "drivers/staging/media/lirc/Kconfig"
@@ -11,3 +11,5 @@ obj-$(CONFIG_VIDEO_OMAP4) += omap4iss/
obj-$(CONFIG_USB_SN9C102) += sn9c102/
obj-$(CONFIG_VIDEO_OMAP2) += omap24xx/
obj-$(CONFIG_VIDEO_TCM825X) += omap24xx/
+obj-$(CONFIG_DVB_RTL2832_SDR) += rtl2832u_sdr/
+
new file mode 100644
@@ -0,0 +1,7 @@
+config DVB_RTL2832_SDR
+ tristate "Realtek RTL2832 SDR"
+ depends on USB && DVB_CORE && I2C && VIDEO_V4L2 && DVB_USB_RTL28XXU
+ select DVB_RTL2832
+ select VIDEOBUF2_VMALLOC
+ default m if !MEDIA_SUBDRV_AUTOSELECT
+
new file mode 100644
@@ -0,0 +1,4 @@
+obj-$(CONFIG_DVB_RTL2832_SDR) += rtl2832_sdr.o
+
+ccflags-y += -Idrivers/media/dvb-core
+ccflags-y += -Idrivers/media/usb/dvb-usb-v2
new file mode 100644
@@ -0,0 +1,1184 @@
+/*
+ * Realtek RTL2832U SDR driver
+ *
+ * Copyright (C) 2013 Antti Palosaari <crope@iki.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * GNU Radio plugin "gr-kernel" for device usage will be on:
+ * http://git.linuxtv.org/anttip/gr-kernel.git
+ *
+ * TODO:
+ * Help is very highly welcome for these + all the others you could imagine:
+ * - move controls to V4L2 API
+ * - use libv4l2 for stream format conversions
+ * - gr-kernel: switch to v4l2_mmap (current read eats a lot of cpu)
+ * - SDRSharp support
+ */
+
+#include "dvb_frontend.h"
+#include "rtl2832_sdr.h"
+#include "dvb_usb.h"
+
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+#include <media/videobuf2-vmalloc.h>
+
+/* TODO: These should be moved to V4L2 API */
+#define RTL2832_SDR_CID_SAMPLING_MODE ((V4L2_CID_USER_BASE | 0xf000) + 0)
+#define RTL2832_SDR_CID_SAMPLING_RATE ((V4L2_CID_USER_BASE | 0xf000) + 1)
+#define RTL2832_SDR_CID_SAMPLING_RESOLUTION ((V4L2_CID_USER_BASE | 0xf000) + 2)
+#define RTL2832_SDR_CID_TUNER_RF ((V4L2_CID_USER_BASE | 0xf000) + 10)
+#define RTL2832_SDR_CID_TUNER_BW ((V4L2_CID_USER_BASE | 0xf000) + 11)
+#define RTL2832_SDR_CID_TUNER_IF ((V4L2_CID_USER_BASE | 0xf000) + 12)
+#define RTL2832_SDR_CID_TUNER_GAIN ((V4L2_CID_USER_BASE | 0xf000) + 13)
+
+#define MAX_BULK_BUFS (8)
+#define BULK_BUFFER_SIZE (8 * 512)
+
+/* intermediate buffers with raw data from the USB device */
+struct rtl2832_sdr_frame_buf {
+ struct vb2_buffer vb; /* common v4l buffer stuff -- must be first */
+ struct list_head list;
+};
+
+struct rtl2832_sdr_state {
+#define POWER_ON (1 << 1)
+#define URB_BUF (1 << 2)
+ unsigned long flags;
+
+ const struct rtl2832_sdr_config *cfg;
+ struct dvb_frontend *fe;
+ struct dvb_usb_device *d;
+ struct i2c_adapter *i2c;
+ u8 bank;
+
+ struct video_device vdev;
+ struct v4l2_device v4l2_dev;
+
+ /* videobuf2 queue and queued buffers list */
+ struct vb2_queue vb_queue;
+ struct list_head queued_bufs;
+ spinlock_t queued_bufs_lock; /* Protects queued_bufs */
+
+ /* Note if taking both locks v4l2_lock must always be locked first! */
+ struct mutex v4l2_lock; /* Protects everything else */
+ struct mutex vb_queue_lock; /* Protects vb_queue and capt_file */
+
+ /* Pointer to our usb_device, will be NULL after unplug */
+ struct usb_device *udev; /* Both mutexes most be hold when setting! */
+
+ unsigned int vb_full; /* vb is full and packets dropped */
+
+ struct urb *urb_list[MAX_BULK_BUFS];
+ int buf_num;
+ unsigned long buf_size;
+ u8 *buf_list[MAX_BULK_BUFS];
+ dma_addr_t dma_addr[MAX_BULK_BUFS];
+ int urbs_initialized;
+ int urbs_submitted;
+
+ /* Controls */
+ struct v4l2_ctrl_handler ctrl_handler;
+ struct v4l2_ctrl *ctrl_sampling_rate;
+ struct v4l2_ctrl *ctrl_tuner_rf;
+ struct v4l2_ctrl *ctrl_tuner_bw;
+ struct v4l2_ctrl *ctrl_tuner_if;
+ struct v4l2_ctrl *ctrl_tuner_gain;
+
+ /* for sample rate calc */
+ unsigned int sample;
+ unsigned int sample_measured;
+ unsigned long jiffies;
+};
+
+/* write multiple hardware registers */
+static int rtl2832_sdr_wr(struct rtl2832_sdr_state *s, u8 reg, const u8 *val,
+ int len)
+{
+ int ret;
+ u8 buf[1 + len];
+ struct i2c_msg msg[1] = {
+ {
+ .addr = s->cfg->i2c_addr,
+ .flags = 0,
+ .len = 1 + len,
+ .buf = buf,
+ }
+ };
+
+ buf[0] = reg;
+ memcpy(&buf[1], val, len);
+
+ ret = i2c_transfer(s->i2c, msg, 1);
+ if (ret == 1) {
+ ret = 0;
+ } else {
+ dev_err(&s->i2c->dev,
+ "%s: I2C wr failed=%d reg=%02x len=%d\n",
+ KBUILD_MODNAME, ret, reg, len);
+ ret = -EREMOTEIO;
+ }
+ return ret;
+}
+
+#if 0
+/* read multiple hardware registers */
+static int rtl2832_sdr_rd(struct rtl2832_sdr_state *s, u8 reg, u8 *val, int len)
+{
+ int ret;
+ struct i2c_msg msg[2] = {
+ {
+ .addr = s->cfg->i2c_addr,
+ .flags = 0,
+ .len = 1,
+ .buf = ®,
+ }, {
+ .addr = s->cfg->i2c_addr,
+ .flags = I2C_M_RD,
+ .len = len,
+ .buf = val,
+ }
+ };
+
+ ret = i2c_transfer(s->i2c, msg, 2);
+ if (ret == 2) {
+ ret = 0;
+ } else {
+ dev_err(&s->i2c->dev,
+ "%s: I2C rd failed=%d reg=%02x len=%d\n",
+ KBUILD_MODNAME, ret, reg, len);
+ ret = -EREMOTEIO;
+ }
+ return ret;
+}
+#endif
+
+/* write multiple registers */
+static int rtl2832_sdr_wr_regs(struct rtl2832_sdr_state *s, u16 reg,
+ const u8 *val, int len)
+{
+ int ret;
+ u8 reg2 = (reg >> 0) & 0xff;
+ u8 bank = (reg >> 8) & 0xff;
+
+ /* switch bank if needed */
+ if (bank != s->bank) {
+ ret = rtl2832_sdr_wr(s, 0x00, &bank, 1);
+ if (ret)
+ return ret;
+
+ s->bank = bank;
+ }
+
+ return rtl2832_sdr_wr(s, reg2, val, len);
+}
+
+#if 0
+/* read multiple registers */
+static int rtl2832_sdr_rd_regs(struct rtl2832_sdr_state *s, u16 reg, u8 *val,
+ int len)
+{
+ int ret;
+ u8 reg2 = (reg >> 0) & 0xff;
+ u8 bank = (reg >> 8) & 0xff;
+
+ /* switch bank if needed */
+ if (bank != s->bank) {
+ ret = rtl2832_sdr_wr(s, 0x00, &bank, 1);
+ if (ret)
+ return ret;
+
+ s->bank = bank;
+ }
+
+ return rtl2832_sdr_rd(s, reg2, val, len);
+}
+
+/* read single register */
+static int rtl2832_sdr_rd_reg(struct rtl2832_sdr_state *s, u16 reg, u8 *val)
+{
+ return rtl2832_sdr_rd_regs(s, reg, val, 1);
+}
+
+/* write single register with mask */
+static int rtl2832_sdr_wr_reg_mask(struct rtl2832_sdr_state *s, u16 reg,
+ u8 val, u8 mask)
+{
+ int ret;
+ u8 tmp;
+
+ /* no need for read if whole reg is written */
+ if (mask != 0xff) {
+ ret = rtl2832_sdr_rd_regs(s, reg, &tmp, 1);
+ if (ret)
+ return ret;
+
+ val &= mask;
+ tmp &= ~mask;
+ val |= tmp;
+ }
+
+ return rtl2832_sdr_wr_regs(s, reg, &val, 1);
+}
+
+/* read single register with mask */
+static int rtl2832_sdr_rd_reg_mask(struct rtl2832_sdr_state *s, u16 reg,
+ u8 *val, u8 mask)
+{
+ int ret, i;
+ u8 tmp;
+
+ ret = rtl2832_sdr_rd_regs(s, reg, &tmp, 1);
+ if (ret)
+ return ret;
+
+ tmp &= mask;
+
+ /* find position of the first bit */
+ for (i = 0; i < 8; i++) {
+ if ((mask >> i) & 0x01)
+ break;
+ }
+ *val = tmp >> i;
+
+ return 0;
+}
+#endif
+
+/* Private functions */
+static struct rtl2832_sdr_frame_buf *rtl2832_sdr_get_next_fill_buf(
+ struct rtl2832_sdr_state *s)
+{
+ unsigned long flags = 0;
+ struct rtl2832_sdr_frame_buf *buf = NULL;
+
+ spin_lock_irqsave(&s->queued_bufs_lock, flags);
+ if (list_empty(&s->queued_bufs))
+ goto leave;
+
+ buf = list_entry(s->queued_bufs.next,
+ struct rtl2832_sdr_frame_buf, list);
+ list_del(&buf->list);
+leave:
+ spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
+ return buf;
+}
+
+/*
+ * Integer to 32-bit IEEE floating point representation routine is taken
+ * from Radeon R600 driver (drivers/gpu/drm/radeon/r600_blit_kms.c).
+ *
+ * TODO: Currently we do conversion here in Kernel, but in future that will
+ * be moved to the libv4l2 library as video format conversions are.
+ */
+#define I2F_FRAC_BITS 23
+#define I2F_MASK ((1 << I2F_FRAC_BITS) - 1)
+
+/*
+ * Converts signed 8-bit integer into 32-bit IEEE floating point
+ * representation.
+ */
+static u32 rtl2832_sdr_convert_sample(struct rtl2832_sdr_state *s, u16 x)
+{
+ u32 msb, exponent, fraction, sign;
+
+ /* Zero is special */
+ if (!x)
+ return 0;
+
+ /* Negative / positive value */
+ if (x & (1 << 7)) {
+ x = -x;
+ x &= 0x7f; /* result is 7 bit ... + sign */
+ sign = 1 << 31;
+ } else {
+ sign = 0 << 31;
+ }
+
+ /* Get location of the most significant bit */
+ msb = __fls(x);
+
+ fraction = ror32(x, (msb - I2F_FRAC_BITS) & 0x1f) & I2F_MASK;
+ exponent = (127 + msb) << I2F_FRAC_BITS;
+
+ return (fraction + exponent) | sign;
+}
+
+static unsigned int rtl2832_sdr_convert_stream(struct rtl2832_sdr_state *s,
+ u32 *dst, const u8 *src, unsigned int src_len)
+{
+ unsigned int i, dst_len = 0;
+
+ for (i = 0; i < src_len; i++)
+ *dst++ = rtl2832_sdr_convert_sample(s, src[i]);
+
+ /* 8-bit to 32-bit IEEE floating point */
+ dst_len = src_len * 4;
+
+ /* calculate samping rate and output it in 10 seconds intervals */
+ if ((s->jiffies + msecs_to_jiffies(10000)) <= jiffies) {
+ unsigned long jiffies_now = jiffies;
+ unsigned long msecs = jiffies_to_msecs(jiffies_now) - jiffies_to_msecs(s->jiffies);
+ unsigned int samples = s->sample - s->sample_measured;
+ s->jiffies = jiffies_now;
+ s->sample_measured = s->sample;
+ dev_dbg(&s->udev->dev,
+ "slen=%d samples=%u msecs=%lu sampling rate=%lu\n",
+ src_len, samples, msecs,
+ samples * 1000UL / msecs);
+ }
+
+ /* total number of I+Q pairs */
+ s->sample += src_len / 2;
+
+ return dst_len;
+}
+
+/*
+ * This gets called for the bulk stream pipe. This is done in interrupt
+ * time, so it has to be fast, not crash, and not stall. Neat.
+ */
+static void rtl2832_sdr_urb_complete(struct urb *urb)
+{
+ struct rtl2832_sdr_state *s = urb->context;
+ struct rtl2832_sdr_frame_buf *fbuf;
+
+ dev_dbg_ratelimited(&s->udev->dev,
+ "%s: status=%d length=%d/%d errors=%d\n",
+ __func__, urb->status, urb->actual_length,
+ urb->transfer_buffer_length, urb->error_count);
+
+ switch (urb->status) {
+ case 0: /* success */
+ case -ETIMEDOUT: /* NAK */
+ break;
+ case -ECONNRESET: /* kill */
+ case -ENOENT:
+ case -ESHUTDOWN:
+ return;
+ default: /* error */
+ dev_err_ratelimited(&s->udev->dev, "urb failed=%d\n",
+ urb->status);
+ break;
+ }
+
+ if (urb->actual_length > 0) {
+ void *ptr;
+ unsigned int len;
+ /* get free framebuffer */
+ fbuf = rtl2832_sdr_get_next_fill_buf(s);
+ if (fbuf == NULL) {
+ s->vb_full++;
+ dev_notice_ratelimited(&s->udev->dev,
+ "videobuf is full, %d packets dropped\n",
+ s->vb_full);
+ goto skip;
+ }
+
+ /* fill framebuffer */
+ ptr = vb2_plane_vaddr(&fbuf->vb, 0);
+ len = rtl2832_sdr_convert_stream(s, ptr, urb->transfer_buffer,
+ urb->actual_length);
+ vb2_set_plane_payload(&fbuf->vb, 0, len);
+ vb2_buffer_done(&fbuf->vb, VB2_BUF_STATE_DONE);
+ }
+skip:
+ usb_submit_urb(urb, GFP_ATOMIC);
+}
+
+static int rtl2832_sdr_kill_urbs(struct rtl2832_sdr_state *s)
+{
+ int i;
+
+ for (i = s->urbs_submitted - 1; i >= 0; i--) {
+ dev_dbg(&s->udev->dev, "%s: kill urb=%d\n", __func__, i);
+ /* stop the URB */
+ usb_kill_urb(s->urb_list[i]);
+ }
+ s->urbs_submitted = 0;
+
+ return 0;
+}
+
+static int rtl2832_sdr_submit_urbs(struct rtl2832_sdr_state *s)
+{
+ int i, ret;
+
+ for (i = 0; i < s->urbs_initialized; i++) {
+ dev_dbg(&s->udev->dev, "%s: submit urb=%d\n", __func__, i);
+ ret = usb_submit_urb(s->urb_list[i], GFP_ATOMIC);
+ if (ret) {
+ dev_err(&s->udev->dev,
+ "Could not submit urb no. %d - get them all back\n",
+ i);
+ rtl2832_sdr_kill_urbs(s);
+ return ret;
+ }
+ s->urbs_submitted++;
+ }
+
+ return 0;
+}
+
+static int rtl2832_sdr_free_stream_bufs(struct rtl2832_sdr_state *s)
+{
+ if (s->flags & USB_STATE_URB_BUF) {
+ while (s->buf_num) {
+ s->buf_num--;
+ dev_dbg(&s->udev->dev, "%s: free buf=%d\n",
+ __func__, s->buf_num);
+ usb_free_coherent(s->udev, s->buf_size,
+ s->buf_list[s->buf_num],
+ s->dma_addr[s->buf_num]);
+ }
+ }
+ s->flags &= ~USB_STATE_URB_BUF;
+
+ return 0;
+}
+
+static int rtl2832_sdr_alloc_stream_bufs(struct rtl2832_sdr_state *s)
+{
+ s->buf_num = 0;
+ s->buf_size = BULK_BUFFER_SIZE;
+
+ dev_dbg(&s->udev->dev,
+ "%s: all in all I will use %u bytes for streaming\n",
+ __func__, MAX_BULK_BUFS * BULK_BUFFER_SIZE);
+
+ for (s->buf_num = 0; s->buf_num < MAX_BULK_BUFS; s->buf_num++) {
+ s->buf_list[s->buf_num] = usb_alloc_coherent(s->udev,
+ BULK_BUFFER_SIZE, GFP_ATOMIC,
+ &s->dma_addr[s->buf_num]);
+ if (!s->buf_list[s->buf_num]) {
+ dev_dbg(&s->udev->dev, "%s: alloc buf=%d failed\n",
+ __func__, s->buf_num);
+ rtl2832_sdr_free_stream_bufs(s);
+ return -ENOMEM;
+ }
+
+ dev_dbg(&s->udev->dev, "%s: alloc buf=%d %p (dma %llu)\n",
+ __func__, s->buf_num,
+ s->buf_list[s->buf_num],
+ (long long)s->dma_addr[s->buf_num]);
+ s->flags |= USB_STATE_URB_BUF;
+ }
+
+ return 0;
+}
+
+static int rtl2832_sdr_free_urbs(struct rtl2832_sdr_state *s)
+{
+ int i;
+
+ rtl2832_sdr_kill_urbs(s);
+
+ for (i = s->urbs_initialized - 1; i >= 0; i--) {
+ if (s->urb_list[i]) {
+ dev_dbg(&s->udev->dev, "%s: free urb=%d\n",
+ __func__, i);
+ /* free the URBs */
+ usb_free_urb(s->urb_list[i]);
+ }
+ }
+ s->urbs_initialized = 0;
+
+ return 0;
+}
+
+static int rtl2832_sdr_alloc_urbs(struct rtl2832_sdr_state *s)
+{
+ int i, j;
+
+ /* allocate the URBs */
+ for (i = 0; i < MAX_BULK_BUFS; i++) {
+ dev_dbg(&s->udev->dev, "%s: alloc urb=%d\n", __func__, i);
+ s->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC);
+ if (!s->urb_list[i]) {
+ dev_dbg(&s->udev->dev, "%s: failed\n", __func__);
+ for (j = 0; j < i; j++)
+ usb_free_urb(s->urb_list[j]);
+ return -ENOMEM;
+ }
+ usb_fill_bulk_urb(s->urb_list[i],
+ s->udev,
+ usb_rcvbulkpipe(s->udev, 0x81),
+ s->buf_list[i],
+ BULK_BUFFER_SIZE,
+ rtl2832_sdr_urb_complete, s);
+
+ s->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
+ s->urb_list[i]->transfer_dma = s->dma_addr[i];
+ s->urbs_initialized++;
+ }
+
+ return 0;
+}
+
+/* Must be called with vb_queue_lock hold */
+static void rtl2832_sdr_cleanup_queued_bufs(struct rtl2832_sdr_state *s)
+{
+ unsigned long flags = 0;
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ spin_lock_irqsave(&s->queued_bufs_lock, flags);
+ while (!list_empty(&s->queued_bufs)) {
+ struct rtl2832_sdr_frame_buf *buf;
+ buf = list_entry(s->queued_bufs.next,
+ struct rtl2832_sdr_frame_buf, list);
+ list_del(&buf->list);
+ vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
+ }
+ spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
+}
+
+/* The user yanked out the cable... */
+static void rtl2832_sdr_release_sec(struct dvb_frontend *fe)
+{
+ struct rtl2832_sdr_state *s = fe->sec_priv;
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ mutex_lock(&s->vb_queue_lock);
+ mutex_lock(&s->v4l2_lock);
+ /* No need to keep the urbs around after disconnection */
+ s->udev = NULL;
+
+ v4l2_device_disconnect(&s->v4l2_dev);
+ video_unregister_device(&s->vdev);
+ mutex_unlock(&s->v4l2_lock);
+ mutex_unlock(&s->vb_queue_lock);
+
+ v4l2_device_put(&s->v4l2_dev);
+
+ fe->sec_priv = NULL;
+}
+
+static int rtl2832_sdr_querycap(struct file *file, void *fh,
+ struct v4l2_capability *cap)
+{
+ struct rtl2832_sdr_state *s = video_drvdata(file);
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ strlcpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
+ strlcpy(cap->card, s->vdev.name, sizeof(cap->card));
+ usb_make_path(s->udev, cap->bus_info, sizeof(cap->bus_info));
+ cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
+ V4L2_CAP_READWRITE;
+ cap->device_caps = V4L2_CAP_TUNER;
+ cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+ return 0;
+}
+
+/* Videobuf2 operations */
+static int rtl2832_sdr_queue_setup(struct vb2_queue *vq,
+ const struct v4l2_format *fmt, unsigned int *nbuffers,
+ unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[])
+{
+ struct rtl2832_sdr_state *s = vb2_get_drv_priv(vq);
+ dev_dbg(&s->udev->dev, "%s: *nbuffers=%d\n", __func__, *nbuffers);
+
+ /* Absolute min and max number of buffers available for mmap() */
+ *nbuffers = 32;
+ *nplanes = 1;
+ sizes[0] = PAGE_ALIGN(BULK_BUFFER_SIZE * 4); /* 8 * 512 * 4 = 16384 */
+ dev_dbg(&s->udev->dev, "%s: nbuffers=%d sizes[0]=%d\n",
+ __func__, *nbuffers, sizes[0]);
+ return 0;
+}
+
+static int rtl2832_sdr_buf_prepare(struct vb2_buffer *vb)
+{
+ struct rtl2832_sdr_state *s = vb2_get_drv_priv(vb->vb2_queue);
+
+ /* Don't allow queing new buffers after device disconnection */
+ if (!s->udev)
+ return -ENODEV;
+
+ return 0;
+}
+
+static void rtl2832_sdr_buf_queue(struct vb2_buffer *vb)
+{
+ struct rtl2832_sdr_state *s = vb2_get_drv_priv(vb->vb2_queue);
+ struct rtl2832_sdr_frame_buf *buf =
+ container_of(vb, struct rtl2832_sdr_frame_buf, vb);
+ unsigned long flags = 0;
+
+ /* Check the device has not disconnected between prep and queuing */
+ if (!s->udev) {
+ vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
+ return;
+ }
+
+ spin_lock_irqsave(&s->queued_bufs_lock, flags);
+ list_add_tail(&buf->list, &s->queued_bufs);
+ spin_unlock_irqrestore(&s->queued_bufs_lock, flags);
+}
+
+static int rtl2832_sdr_set_adc(struct rtl2832_sdr_state *s)
+{
+ int ret;
+ unsigned int f_sr;
+
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ if (!test_bit(POWER_ON, &s->flags))
+ return 0;
+
+ f_sr = s->ctrl_sampling_rate->val64;
+
+ ret = rtl2832_sdr_wr_regs(s, 0x13e, "\x00\x00", 2);
+ ret = rtl2832_sdr_wr_regs(s, 0x115, "\x00", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x116, "\x00\x00", 2);
+ ret = rtl2832_sdr_wr_regs(s, 0x118, "\x00", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x119, "\x00\x00", 2);
+ ret = rtl2832_sdr_wr_regs(s, 0x11b, "\x00", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x19f, "\x03\x84", 2);
+ ret = rtl2832_sdr_wr_regs(s, 0x1a1, "\x00\x00", 2);
+ ret = rtl2832_sdr_wr_regs(s, 0x11c, "\xca", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x11d, "\xdc", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x11e, "\xd7", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x11f, "\xd8", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x120, "\xe0", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x121, "\xf2", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x122, "\x0e", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x123, "\x35", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x124, "\x06", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x125, "\x50", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x126, "\x9c", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x127, "\x0d", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x128, "\x71", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x129, "\x11", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x12a, "\x14", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x12b, "\x71", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x12c, "\x74", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x12d, "\x19", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x12e, "\x41", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x12f, "\xa5", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x017, "\x11", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x018, "\x10", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x019, "\x21", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x01f, "\xff", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x01e, "\x01", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x01d, "\x06", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x01c, "\x0d", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x01b, "\x16", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x01a, "\x1b", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x192, "\x00", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x193, "\xf0", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x194, "\x0f", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x061, "\x60", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x006, "\x80", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x112, "\x5a", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x102, "\x40", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x103, "\x5a", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x1c7, "\x30", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x104, "\xd0", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x105, "\xbe", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x1c8, "\x18", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x106, "\x35", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x1c9, "\x21", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x1ca, "\x21", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x1cb, "\x00", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x107, "\x40", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x1cd, "\x10", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x1ce, "\x10", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x108, "\x80", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x109, "\x7f", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x10a, "\x80", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x10b, "\x7f", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x00e, "\xfc", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x00e, "\xfc", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x011, "\xd4", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x1e5, "\xf0", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x1d9, "\x00", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x1db, "\x00", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x1dd, "\x14", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x1de, "\xec", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x1d8, "\x0c", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x1e6, "\x02", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x1d7, "\x09", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x00d, "\x83", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x010, "\x49", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x00d, "\x87", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x00d, "\x85", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x013, "\x02", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x008, "\xcd", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x1b1, "\x01", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x101, "\x14", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x101, "\x10", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x019, "\x21", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x10c, "\x00", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x101, "\x14", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x101, "\x10", 1);
+ ret = rtl2832_sdr_wr_regs(s, 0x116, "\x00\xe3", 2);
+ ret = rtl2832_sdr_wr_regs(s, 0x118, "\x8e", 1);
+
+ return ret;
+};
+
+static int rtl2832_sdr_set_tuner(struct rtl2832_sdr_state *s)
+{
+ struct dvb_frontend *fe = s->fe;
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+
+ unsigned int f_rf = s->ctrl_tuner_rf->val64;
+
+ /*
+ * bandwidth (Hz)
+ */
+ unsigned int bandwidth = s->ctrl_tuner_bw->val;
+
+ /*
+ * intermediate frequency (Hz)
+ */
+ unsigned int f_if = s->ctrl_tuner_if->val;
+
+ /*
+ * gain (dB)
+ */
+ int gain = s->ctrl_tuner_gain->val;
+
+ dev_dbg(&s->udev->dev,
+ "%s: f_rf=%u bandwidth=%d f_if=%u gain=%d\n",
+ __func__, f_rf, bandwidth, f_if, gain);
+
+ if (!test_bit(POWER_ON, &s->flags))
+ return 0;
+
+ if (fe->ops.tuner_ops.init)
+ fe->ops.tuner_ops.init(fe);
+
+ c->bandwidth_hz = bandwidth;
+ c->frequency = f_rf;
+
+ if (fe->ops.tuner_ops.set_params)
+ fe->ops.tuner_ops.set_params(fe);
+
+ return 0;
+};
+
+static void rtl2832_sdr_unset_tuner(struct rtl2832_sdr_state *s)
+{
+ struct dvb_frontend *fe = s->fe;
+
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ if (fe->ops.tuner_ops.sleep)
+ fe->ops.tuner_ops.sleep(fe);
+
+ return;
+};
+
+static int rtl2832_sdr_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct rtl2832_sdr_state *s = vb2_get_drv_priv(vq);
+ int ret;
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ if (!s->udev)
+ return -ENODEV;
+
+ if (mutex_lock_interruptible(&s->v4l2_lock))
+ return -ERESTARTSYS;
+
+ if (s->d->props->power_ctrl)
+ s->d->props->power_ctrl(s->d, 1);
+
+ set_bit(POWER_ON, &s->flags);
+
+ ret = rtl2832_sdr_set_tuner(s);
+ if (ret)
+ goto err;
+
+ ret = rtl2832_sdr_set_adc(s);
+ if (ret)
+ goto err;
+
+ ret = rtl2832_sdr_alloc_stream_bufs(s);
+ if (ret)
+ goto err;
+
+ ret = rtl2832_sdr_alloc_urbs(s);
+ if (ret)
+ goto err;
+
+ ret = rtl2832_sdr_submit_urbs(s);
+ if (ret)
+ goto err;
+
+err:
+ mutex_unlock(&s->v4l2_lock);
+
+ return ret;
+}
+
+static int rtl2832_sdr_stop_streaming(struct vb2_queue *vq)
+{
+ struct rtl2832_sdr_state *s = vb2_get_drv_priv(vq);
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ if (mutex_lock_interruptible(&s->v4l2_lock))
+ return -ERESTARTSYS;
+
+ rtl2832_sdr_kill_urbs(s);
+ rtl2832_sdr_free_urbs(s);
+ rtl2832_sdr_free_stream_bufs(s);
+ rtl2832_sdr_cleanup_queued_bufs(s);
+ rtl2832_sdr_unset_tuner(s);
+
+ clear_bit(POWER_ON, &s->flags);
+
+ if (s->d->props->power_ctrl)
+ s->d->props->power_ctrl(s->d, 0);
+
+ mutex_unlock(&s->v4l2_lock);
+
+ return 0;
+}
+
+static struct vb2_ops rtl2832_sdr_vb2_ops = {
+ .queue_setup = rtl2832_sdr_queue_setup,
+ .buf_prepare = rtl2832_sdr_buf_prepare,
+ .buf_queue = rtl2832_sdr_buf_queue,
+ .start_streaming = rtl2832_sdr_start_streaming,
+ .stop_streaming = rtl2832_sdr_stop_streaming,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+};
+
+static int rtl2832_sdr_enum_input(struct file *file, void *fh, struct v4l2_input *i)
+{
+ if (i->index != 0)
+ return -EINVAL;
+
+ strlcpy(i->name, "SDR data", sizeof(i->name));
+ i->type = V4L2_INPUT_TYPE_CAMERA;
+
+ return 0;
+}
+
+static int rtl2832_sdr_g_input(struct file *file, void *fh, unsigned int *i)
+{
+ *i = 0;
+
+ return 0;
+}
+
+static int rtl2832_sdr_s_input(struct file *file, void *fh, unsigned int i)
+{
+ return i ? -EINVAL : 0;
+}
+
+static int vidioc_s_tuner(struct file *file, void *priv,
+ const struct v4l2_tuner *v)
+{
+ struct rtl2832_sdr_state *s = video_drvdata(file);
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ return 0;
+}
+
+static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v)
+{
+ struct rtl2832_sdr_state *s = video_drvdata(file);
+ dev_dbg(&s->udev->dev, "%s:\n", __func__);
+
+ strcpy(v->name, "SDR RX");
+ v->capability = V4L2_TUNER_CAP_LOW;
+
+ return 0;
+}
+
+static int vidioc_s_frequency(struct file *file, void *priv,
+ const struct v4l2_frequency *f)
+{
+ struct rtl2832_sdr_state *s = video_drvdata(file);
+ dev_dbg(&s->udev->dev, "%s: frequency=%lu Hz (%u)\n",
+ __func__, f->frequency * 625UL / 10UL, f->frequency);
+
+ return v4l2_ctrl_s_ctrl_int64(s->ctrl_tuner_rf,
+ f->frequency * 625UL / 10UL);
+}
+
+static const struct v4l2_ioctl_ops rtl2832_sdr_ioctl_ops = {
+ .vidioc_querycap = rtl2832_sdr_querycap,
+
+ .vidioc_enum_input = rtl2832_sdr_enum_input,
+ .vidioc_g_input = rtl2832_sdr_g_input,
+ .vidioc_s_input = rtl2832_sdr_s_input,
+
+ .vidioc_reqbufs = vb2_ioctl_reqbufs,
+ .vidioc_create_bufs = vb2_ioctl_create_bufs,
+ .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
+ .vidioc_querybuf = vb2_ioctl_querybuf,
+ .vidioc_qbuf = vb2_ioctl_qbuf,
+ .vidioc_dqbuf = vb2_ioctl_dqbuf,
+
+ .vidioc_streamon = vb2_ioctl_streamon,
+ .vidioc_streamoff = vb2_ioctl_streamoff,
+
+ .vidioc_g_tuner = vidioc_g_tuner,
+ .vidioc_s_tuner = vidioc_s_tuner,
+ .vidioc_s_frequency = vidioc_s_frequency,
+
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+ .vidioc_log_status = v4l2_ctrl_log_status,
+};
+
+static const struct v4l2_file_operations rtl2832_sdr_fops = {
+ .owner = THIS_MODULE,
+ .open = v4l2_fh_open,
+ .release = vb2_fop_release,
+ .read = vb2_fop_read,
+ .poll = vb2_fop_poll,
+ .mmap = vb2_fop_mmap,
+ .unlocked_ioctl = video_ioctl2,
+};
+
+static struct video_device rtl2832_sdr_template = {
+ .name = "Realtek RTL2832U SDR",
+ .release = video_device_release_empty,
+ .fops = &rtl2832_sdr_fops,
+ .ioctl_ops = &rtl2832_sdr_ioctl_ops,
+};
+
+static int rtl2832_sdr_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct rtl2832_sdr_state *s =
+ container_of(ctrl->handler, struct rtl2832_sdr_state,
+ ctrl_handler);
+ int ret;
+ dev_dbg(&s->udev->dev,
+ "%s: id=%d name=%s val=%d min=%d max=%d step=%d\n",
+ __func__, ctrl->id, ctrl->name, ctrl->val,
+ ctrl->minimum, ctrl->maximum, ctrl->step);
+
+ switch (ctrl->id) {
+ case RTL2832_SDR_CID_SAMPLING_MODE:
+ case RTL2832_SDR_CID_SAMPLING_RATE:
+ case RTL2832_SDR_CID_SAMPLING_RESOLUTION:
+ ret = rtl2832_sdr_set_adc(s);
+ break;
+ case RTL2832_SDR_CID_TUNER_RF:
+ case RTL2832_SDR_CID_TUNER_BW:
+ case RTL2832_SDR_CID_TUNER_IF:
+ case RTL2832_SDR_CID_TUNER_GAIN:
+ ret = rtl2832_sdr_set_tuner(s);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static const struct v4l2_ctrl_ops rtl2832_sdr_ctrl_ops = {
+ .s_ctrl = rtl2832_sdr_s_ctrl,
+};
+
+static void rtl2832_sdr_video_release(struct v4l2_device *v)
+{
+ struct rtl2832_sdr_state *s =
+ container_of(v, struct rtl2832_sdr_state, v4l2_dev);
+
+ v4l2_ctrl_handler_free(&s->ctrl_handler);
+ v4l2_device_unregister(&s->v4l2_dev);
+ kfree(s);
+}
+
+struct dvb_frontend *rtl2832_sdr_attach(struct dvb_frontend *fe,
+ struct i2c_adapter *i2c, const struct rtl2832_sdr_config *cfg)
+{
+ int ret;
+ struct rtl2832_sdr_state *s;
+ struct dvb_usb_device *d = i2c_get_adapdata(i2c);
+ static const char * const ctrl_sampling_mode_qmenu_strings[] = {
+ "Quadrature Sampling",
+ NULL,
+ };
+ static const struct v4l2_ctrl_config ctrl_sampling_mode = {
+ .ops = &rtl2832_sdr_ctrl_ops,
+ .id = RTL2832_SDR_CID_SAMPLING_MODE,
+ .type = V4L2_CTRL_TYPE_MENU,
+ .flags = V4L2_CTRL_FLAG_INACTIVE,
+ .name = "Sampling Mode",
+ .qmenu = ctrl_sampling_mode_qmenu_strings,
+ };
+ static const struct v4l2_ctrl_config ctrl_sampling_rate = {
+ .ops = &rtl2832_sdr_ctrl_ops,
+ .id = RTL2832_SDR_CID_SAMPLING_RATE,
+ .type = V4L2_CTRL_TYPE_INTEGER64,
+ .name = "Sampling Rate",
+ .min = 500000,
+ .max = 4000000,
+ .def = 2048000,
+ .step = 1,
+ };
+ static const struct v4l2_ctrl_config ctrl_sampling_resolution = {
+ .ops = &rtl2832_sdr_ctrl_ops,
+ .id = RTL2832_SDR_CID_SAMPLING_RESOLUTION,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .flags = V4L2_CTRL_FLAG_INACTIVE,
+ .name = "Sampling Resolution",
+ .min = 8,
+ .max = 8,
+ .def = 8,
+ .step = 1,
+ };
+ static const struct v4l2_ctrl_config ctrl_tuner_rf = {
+ .ops = &rtl2832_sdr_ctrl_ops,
+ .id = RTL2832_SDR_CID_TUNER_RF,
+ .type = V4L2_CTRL_TYPE_INTEGER64,
+ .name = "Tuner RF",
+ .min = 40000000,
+ .max = 2000000000,
+ .def = 100000000,
+ .step = 1,
+ };
+ static const struct v4l2_ctrl_config ctrl_tuner_bw = {
+ .ops = &rtl2832_sdr_ctrl_ops,
+ .id = RTL2832_SDR_CID_TUNER_BW,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Tuner BW",
+ .min = 200000,
+ .max = 8000000,
+ .def = 600000,
+ .step = 1,
+ };
+ static const struct v4l2_ctrl_config ctrl_tuner_if = {
+ .ops = &rtl2832_sdr_ctrl_ops,
+ .id = RTL2832_SDR_CID_TUNER_IF,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .flags = V4L2_CTRL_FLAG_INACTIVE,
+ .name = "Tuner IF",
+ .min = 0,
+ .max = 10,
+ .def = 0,
+ .step = 1,
+ };
+ static const struct v4l2_ctrl_config ctrl_tuner_gain = {
+ .ops = &rtl2832_sdr_ctrl_ops,
+ .id = RTL2832_SDR_CID_TUNER_GAIN,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Tuner Gain",
+ .min = 0,
+ .max = 102,
+ .def = 0,
+ .step = 1,
+ };
+
+ s = kzalloc(sizeof(struct rtl2832_sdr_state), GFP_KERNEL);
+ if (s == NULL) {
+ dev_err(&d->udev->dev,
+ "Could not allocate memory for rtl2832_sdr_state\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ /* setup the state */
+ s->fe = fe;
+ s->d = d;
+ s->udev = d->udev;
+ s->i2c = i2c;
+ s->cfg = cfg;
+
+ mutex_init(&s->v4l2_lock);
+ mutex_init(&s->vb_queue_lock);
+ spin_lock_init(&s->queued_bufs_lock);
+ INIT_LIST_HEAD(&s->queued_bufs);
+
+ /* Init videobuf2 queue structure */
+ s->vb_queue.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ s->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
+ s->vb_queue.drv_priv = s;
+ s->vb_queue.buf_struct_size = sizeof(struct rtl2832_sdr_frame_buf);
+ s->vb_queue.ops = &rtl2832_sdr_vb2_ops;
+ s->vb_queue.mem_ops = &vb2_vmalloc_memops;
+ s->vb_queue.timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ ret = vb2_queue_init(&s->vb_queue);
+ if (ret < 0) {
+ dev_err(&s->udev->dev, "Could not initialize vb2 queue\n");
+ goto err_free_mem;
+ }
+
+ /* Init video_device structure */
+ s->vdev = rtl2832_sdr_template;
+ s->vdev.queue = &s->vb_queue;
+ s->vdev.queue->lock = &s->vb_queue_lock;
+ set_bit(V4L2_FL_USE_FH_PRIO, &s->vdev.flags);
+ video_set_drvdata(&s->vdev, s);
+
+ /* Register controls */
+ v4l2_ctrl_handler_init(&s->ctrl_handler, 7);
+ v4l2_ctrl_new_custom(&s->ctrl_handler, &ctrl_sampling_mode, NULL);
+ s->ctrl_sampling_rate = v4l2_ctrl_new_custom(&s->ctrl_handler, &ctrl_sampling_rate, NULL);
+ v4l2_ctrl_new_custom(&s->ctrl_handler, &ctrl_sampling_resolution, NULL);
+ s->ctrl_tuner_rf = v4l2_ctrl_new_custom(&s->ctrl_handler, &ctrl_tuner_rf, NULL);
+ s->ctrl_tuner_bw = v4l2_ctrl_new_custom(&s->ctrl_handler, &ctrl_tuner_bw, NULL);
+ s->ctrl_tuner_if = v4l2_ctrl_new_custom(&s->ctrl_handler, &ctrl_tuner_if, NULL);
+ s->ctrl_tuner_gain = v4l2_ctrl_new_custom(&s->ctrl_handler, &ctrl_tuner_gain, NULL);
+ if (s->ctrl_handler.error) {
+ ret = s->ctrl_handler.error;
+ dev_err(&s->udev->dev, "Could not initialize controls\n");
+ goto err_free_controls;
+ }
+
+ /* Register the v4l2_device structure */
+ s->v4l2_dev.release = rtl2832_sdr_video_release;
+ ret = v4l2_device_register(&s->udev->dev, &s->v4l2_dev);
+ if (ret) {
+ dev_err(&s->udev->dev,
+ "Failed to register v4l2-device (%d)\n", ret);
+ goto err_free_controls;
+ }
+
+ s->v4l2_dev.ctrl_handler = &s->ctrl_handler;
+ s->vdev.v4l2_dev = &s->v4l2_dev;
+ s->vdev.lock = &s->v4l2_lock;
+
+ ret = video_register_device(&s->vdev, VFL_TYPE_GRABBER, -1);
+ if (ret < 0) {
+ dev_err(&s->udev->dev,
+ "Failed to register as video device (%d)\n",
+ ret);
+ goto err_unregister_v4l2_dev;
+ }
+ dev_info(&s->udev->dev, "Registered as %s\n",
+ video_device_node_name(&s->vdev));
+
+ fe->sec_priv = s;
+ fe->ops.release_sec = rtl2832_sdr_release_sec;
+
+ dev_info(&s->i2c->dev, "%s: Realtek RTL2832 SDR attached\n",
+ KBUILD_MODNAME);
+ return fe;
+
+err_unregister_v4l2_dev:
+ v4l2_device_unregister(&s->v4l2_dev);
+err_free_controls:
+ v4l2_ctrl_handler_free(&s->ctrl_handler);
+err_free_mem:
+ kfree(s);
+ return ERR_PTR(ret);
+}
+EXPORT_SYMBOL(rtl2832_sdr_attach);
+
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_DESCRIPTION("Realtek RTL2832 SDR driver");
+MODULE_LICENSE("GPL");
new file mode 100644
@@ -0,0 +1,52 @@
+/*
+ * Realtek RTL2832U SDR driver
+ *
+ * Copyright (C) 2013 Antti Palosaari <crope@iki.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * GNU Radio plugin "gr-kernel" for device usage will be on:
+ * http://git.linuxtv.org/anttip/gr-kernel.git
+ *
+ * TODO:
+ * Help is very highly welcome for these + all the others you could imagine:
+ * - move controls to V4L2 API
+ * - use libv4l2 for stream format conversions
+ * - gr-kernel: switch to v4l2_mmap (current read eats a lot of cpu)
+ * - SDRSharp support
+ */
+
+#ifndef RTL2832_SDR_H
+#define RTL2832_SDR_H
+
+#include <linux/kconfig.h>
+
+struct rtl2832_sdr_config {
+ u8 i2c_addr;
+};
+
+#if IS_ENABLED(CONFIG_DVB_RTL2832_SDR)
+extern struct dvb_frontend *rtl2832_sdr_attach(struct dvb_frontend *fe,
+ struct i2c_adapter *i2c, const struct rtl2832_sdr_config *cfg);
+#else
+static inline struct dvb_frontend *rtl2832_sdr_attach(struct dvb_frontend *fe,
+ struct i2c_adapter *i2c, const struct rtl2832_sdr_config *cfg)
+{
+ dev_warn(&i2c->dev, "%s: driver disabled by Kconfig\n", __func__);
+ return NULL;
+}
+#endif
+
+#endif /* RTL2832_SDR_H */
Implement SDR driver for Realtek RTL2832U chip as a DVB extension module. SDR module is attached by DVB USB RTL28XXU driver as a DVB SEC (satellite equipment controller) module. Abusing unused SEC here has no harm as that is DVB-T only frontend. SDR functionality is provided by RTL2832 DVB-T demodulator. I suspect it is originally planned for DAB and FM, but it could be abused general SDR, due to modern silicon tuners that has wide frequency range and a lot of configurable parameters (filters, gains, ...). http://thread.gmane.org/gmane.linux.drivers.video-input-infrastructure/44461 Signed-off-by: Antti Palosaari <crope@iki.fi> --- drivers/staging/media/Kconfig | 2 + drivers/staging/media/Makefile | 2 + drivers/staging/media/rtl2832u_sdr/Kconfig | 7 + drivers/staging/media/rtl2832u_sdr/Makefile | 4 + drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c | 1184 ++++++++++++++++++++++ drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.h | 52 + 6 files changed, 1251 insertions(+) create mode 100644 drivers/staging/media/rtl2832u_sdr/Kconfig create mode 100644 drivers/staging/media/rtl2832u_sdr/Makefile create mode 100644 drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c create mode 100644 drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.h