diff options
Diffstat (limited to 'drivers/media/dvb-frontends/rtl2832_sdr.c')
| -rw-r--r-- | drivers/media/dvb-frontends/rtl2832_sdr.c | 1551 |
1 files changed, 1551 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/rtl2832_sdr.c b/drivers/media/dvb-frontends/rtl2832_sdr.c new file mode 100644 index 00000000000..023e0f49c78 --- /dev/null +++ b/drivers/media/dvb-frontends/rtl2832_sdr.c @@ -0,0 +1,1551 @@ +/* + * 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 + * + */ + +#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> + +#include <linux/jiffies.h> +#include <linux/math64.h> + +static bool rtl2832_sdr_emulated_fmt; +module_param_named(emulated_formats, rtl2832_sdr_emulated_fmt, bool, 0644); +MODULE_PARM_DESC(emulated_formats, "enable emulated formats (disappears in future)"); + +#define MAX_BULK_BUFS (10) +#define BULK_BUFFER_SIZE (128 * 512) + +static const struct v4l2_frequency_band bands_adc[] = { + { + .tuner = 0, + .type = V4L2_TUNER_ADC, + .index = 0, + .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS, + .rangelow = 300000, + .rangehigh = 300000, + }, + { + .tuner = 0, + .type = V4L2_TUNER_ADC, + .index = 1, + .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS, + .rangelow = 900001, + .rangehigh = 2800000, + }, + { + .tuner = 0, + .type = V4L2_TUNER_ADC, + .index = 2, + .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS, + .rangelow = 3200000, + .rangehigh = 3200000, + }, +}; + +static const struct v4l2_frequency_band bands_fm[] = { + { + .tuner = 1, + .type = V4L2_TUNER_RF, + .index = 0, + .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS, + .rangelow = 50000000, + .rangehigh = 2000000000, + }, +}; + +/* stream formats */ +struct rtl2832_sdr_format { + char *name; + u32 pixelformat; + u32 buffersize; +}; + +static struct rtl2832_sdr_format formats[] = { + { + .name = "Complex U8", + .pixelformat = V4L2_SDR_FMT_CU8, + .buffersize = BULK_BUFFER_SIZE, + }, { + .name = "Complex U16LE (emulated)", + .pixelformat = V4L2_SDR_FMT_CU16LE, + .buffersize = BULK_BUFFER_SIZE * 2, + }, +}; + +static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats); + +/* 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_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 */ + unsigned sequence; /* buffer sequence counter */ + + /* 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; + + unsigned int f_adc, f_tuner; + u32 pixelformat; + u32 buffersize; + unsigned int num_formats; + + /* Controls */ + struct v4l2_ctrl_handler hdl; + struct v4l2_ctrl *bandwidth_auto; + struct v4l2_ctrl *bandwidth; + + /* for sample rate calc */ + unsigned int sample; + unsigned int sample_measured; + unsigned long jiffies_next; +}; + +/* write multiple hardware registers */ +static int rtl2832_sdr_wr(struct rtl2832_sdr_state *s, u8 reg, const u8 *val, + int len) +{ + int ret; +#define MAX_WR_LEN 24 +#define MAX_WR_XFER_LEN (MAX_WR_LEN + 1) + u8 buf[MAX_WR_XFER_LEN]; + struct i2c_msg msg[1] = { + { + .addr = s->cfg->i2c_addr, + .flags = 0, + .len = 1 + len, + .buf = buf, + } + }; + + if (WARN_ON(len > MAX_WR_LEN)) + return -EINVAL; + + 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; +} + +/* 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; +} + +/* 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); +} + +/* 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); +} + +/* write single register */ +static int rtl2832_sdr_wr_reg(struct rtl2832_sdr_state *s, u16 reg, u8 val) +{ + return rtl2832_sdr_wr_regs(s, reg, &val, 1); +} + +#if 0 +/* 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); +} +#endif + +/* 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); +} + +#if 0 +/* 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; +} + +static unsigned int rtl2832_sdr_convert_stream(struct rtl2832_sdr_state *s, + void *dst, const u8 *src, unsigned int src_len) +{ + unsigned int dst_len; + + if (s->pixelformat == V4L2_SDR_FMT_CU8) { + /* native stream, no need to convert */ + memcpy(dst, src, src_len); + dst_len = src_len; + } else if (s->pixelformat == V4L2_SDR_FMT_CU16LE) { + /* convert u8 to u16 */ + unsigned int i; + u16 *u16dst = dst; + + for (i = 0; i < src_len; i++) + *u16dst++ = (src[i] << 8) | (src[i] >> 0); + dst_len = 2 * src_len; + } else { + dst_len = 0; + } + + /* calculate samping rate and output it in 10 seconds intervals */ + if (unlikely(time_is_before_jiffies(s->jiffies_next))) { +#define MSECS 10000UL + unsigned int samples = s->sample - s->sample_measured; + + s->jiffies_next = jiffies + msecs_to_jiffies(MSECS); + 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 (likely(urb->actual_length > 0)) { + void *ptr; + unsigned int len; + /* get free framebuffer */ + fbuf = rtl2832_sdr_get_next_fill_buf(s); + if (unlikely(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); + v4l2_get_timestamp(&fbuf->vb.v4l2_buf.timestamp); + fbuf->vb.v4l2_buf.sequence = s->sequence++; + 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_SDR_CAPTURE | V4L2_CAP_STREAMING | + V4L2_CAP_READWRITE | 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); + + /* Need at least 8 buffers */ + if (vq->num_buffers + *nbuffers < 8) + *nbuffers = 8 - vq->num_buffers; + *nplanes = 1; + sizes[0] = PAGE_ALIGN(s->buffersize); + 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) +{ + struct dvb_frontend *fe = s->fe; + int ret; + unsigned int f_sr, f_if; + u8 buf[4], u8tmp1, u8tmp2; + u64 u64tmp; + u32 u32tmp; + + dev_dbg(&s->udev->dev, "%s: f_adc=%u\n", __func__, s->f_adc); + + if (!test_bit(POWER_ON, &s->flags)) + return 0; + + if (s->f_adc == 0) + return 0; + + f_sr = s->f_adc; + + ret = rtl2832_sdr_wr_regs(s, 0x13e, "\x00\x00", 2); + if (ret) + goto err; + + ret = rtl2832_sdr_wr_regs(s, 0x115, "\x00\x00\x00\x00", 4); + if (ret) + goto err; + + /* get IF from tuner */ + if (fe->ops.tuner_ops.get_if_frequency) + ret = fe->ops.tuner_ops.get_if_frequency(fe, &f_if); + else + ret = -EINVAL; + + if (ret) + goto err; + + /* program IF */ + u64tmp = f_if % s->cfg->xtal; + u64tmp *= 0x400000; + u64tmp = div_u64(u64tmp, s->cfg->xtal); + u64tmp = -u64tmp; + u32tmp = u64tmp & 0x3fffff; + + dev_dbg(&s->udev->dev, "%s: f_if=%u if_ctl=%08x\n", + __func__, f_if, u32tmp); + + buf[0] = (u32tmp >> 16) & 0xff; + buf[1] = (u32tmp >> 8) & 0xff; + buf[2] = (u32tmp >> 0) & 0xff; + + ret = rtl2832_sdr_wr_regs(s, 0x119, buf, 3); + if (ret) + goto err; + + /* BB / IF mode */ + /* POR: 0x1b1=0x1f, 0x008=0x0d, 0x006=0x80 */ + if (f_if) { + u8tmp1 = 0x1a; /* disable Zero-IF */ + u8tmp2 = 0x8d; /* enable ADC I */ + } else { + u8tmp1 = 0x1b; /* enable Zero-IF, DC, IQ */ + u8tmp2 = 0xcd; /* enable ADC I, ADC Q */ + } + + ret = rtl2832_sdr_wr_reg(s, 0x1b1, u8tmp1); + if (ret) + goto err; + + ret = rtl2832_sdr_wr_reg(s, 0x008, u8tmp2); + if (ret) + goto err; + + ret = rtl2832_sdr_wr_reg(s, 0x006, 0x80); + if (ret) + goto err; + + /* program sampling rate (resampling down) */ + u32tmp = div_u64(s->cfg->xtal * 0x400000ULL, f_sr * 4U); + u32tmp <<= 2; + buf[0] = (u32tmp >> 24) & 0xff; + buf[1] = (u32tmp >> 16) & 0xff; + buf[2] = (u32tmp >> 8) & 0xff; + buf[3] = (u32tmp >> 0) & 0xff; + ret = rtl2832_sdr_wr_regs(s, 0x19f, buf, 4); + if (ret) + goto err; + + /* low-pass filter */ + ret = rtl2832_sdr_wr_regs(s, 0x11c, + "\xca\xdc\xd7\xd8\xe0\xf2\x0e\x35\x06\x50\x9c\x0d\x71\x11\x14\x71\x74\x19\x41\xa5", + 20); + if (ret) + goto err; + + ret = rtl2832_sdr_wr_regs(s, 0x017, "\x11\x10", 2); + if (ret) + goto err; + + /* mode */ + ret = rtl2832_sdr_wr_regs(s, 0x019, "\x05", 1); + if (ret) + goto err; + + ret = rtl2832_sdr_wr_regs(s, 0x01a, "\x1b\x16\x0d\x06\x01\xff", 6); + if (ret) + goto err; + + /* FSM */ + ret = rtl2832_sdr_wr_regs(s, 0x192, "\x00\xf0\x0f", 3); + if (ret) + goto err; + + /* PID filter */ + ret = rtl2832_sdr_wr_regs(s, 0x061, "\x60", 1); + if (ret) + goto err; + + /* used RF tuner based settings */ + switch (s->cfg->tuner) { + case RTL2832_TUNER_E4000: + 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); + break; + case RTL2832_TUNER_FC0012: + case RTL2832_TUNER_FC0013: + 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, "\x2c", 1); + ret = rtl2832_sdr_wr_regs(s, 0x104, "\xcc", 1); + ret = rtl2832_sdr_wr_regs(s, 0x105, "\xbe", 1); + ret = rtl2832_sdr_wr_regs(s, 0x1c8, "\x16", 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, "\xe9\xbf", 2); + 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, "\x11", 1); + ret = rtl2832_sdr_wr_regs(s, 0x1de, "\xef", 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); + break; + case RTL2832_TUNER_R820T: + ret = rtl2832_sdr_wr_regs(s, 0x112, "\x5a", 1); + ret = rtl2832_sdr_wr_regs(s, 0x102, "\x40", 1); + ret = rtl2832_sdr_wr_regs(s, 0x115, "\x01", 1); + ret = rtl2832_sdr_wr_regs(s, 0x103, "\x80", 1); + ret = rtl2832_sdr_wr_regs(s, 0x1c7, "\x24", 1); + ret = rtl2832_sdr_wr_regs(s, 0x104, "\xcc", 1); + ret = rtl2832_sdr_wr_regs(s, 0x105, "\xbe", 1); + ret = rtl2832_sdr_wr_regs(s, 0x1c8, "\x14", 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, "\xf4", 1); + break; + default: + dev_notice(&s->udev->dev, "Unsupported tuner\n"); + } + + /* software reset */ + ret = rtl2832_sdr_wr_reg_mask(s, 0x101, 0x04, 0x04); + if (ret) + goto err; + + ret = rtl2832_sdr_wr_reg_mask(s, 0x101, 0x00, 0x04); + if (ret) + goto err; +err: + return ret; +}; + +static void rtl2832_sdr_unset_adc(struct rtl2832_sdr_state *s) +{ + int ret; + + dev_dbg(&s->udev->dev, "%s:\n", __func__); + + /* PID filter */ + ret = rtl2832_sdr_wr_regs(s, 0x061, "\xe0", 1); + if (ret) + goto err; + + /* mode */ + ret = rtl2832_sdr_wr_regs(s, 0x019, "\x20", 1); + if (ret) + goto err; + + ret = rtl2832_sdr_wr_regs(s, 0x017, "\x11\x10", 2); + if (ret) + goto err; + + /* FSM */ + ret = rtl2832_sdr_wr_regs(s, 0x192, "\x00\x0f\xff", 3); + if (ret) + goto err; + + ret = rtl2832_sdr_wr_regs(s, 0x13e, "\x40\x00", 2); + if (ret) + goto err; + + ret = rtl2832_sdr_wr_regs(s, 0x115, "\x06\x3f\xce\xcc", 4); + if (ret) + goto err; +err: + return; +}; + +static int rtl2832_sdr_set_tuner_freq(struct rtl2832_sdr_state *s) +{ + struct dvb_frontend *fe = s->fe; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + struct v4l2_ctrl *bandwidth_auto; + struct v4l2_ctrl *bandwidth; + + /* + * tuner RF (Hz) + */ + if (s->f_tuner == 0) + return 0; + + /* + * bandwidth (Hz) + */ + bandwidth_auto = v4l2_ctrl_find(&s->hdl, + V4L2_CID_RF_TUNER_BANDWIDTH_AUTO); + bandwidth = v4l2_ctrl_find(&s->hdl, V4L2_CID_RF_TUNER_BANDWIDTH); + if (v4l2_ctrl_g_ctrl(bandwidth_auto)) { + c->bandwidth_hz = s->f_adc; + v4l2_ctrl_s_ctrl(bandwidth, s->f_adc); + } else { + c->bandwidth_hz = v4l2_ctrl_g_ctrl(bandwidth); + } + + c->frequency = s->f_tuner; + c->delivery_system = SYS_DVBT; + + dev_dbg(&s->udev->dev, "%s: frequency=%u bandwidth=%d\n", + __func__, c->frequency, c->bandwidth_hz); + + if (!test_bit(POWER_ON, &s->flags)) + return 0; + + if (fe->ops.tuner_ops.set_params) + fe->ops.tuner_ops.set_params(fe); + + return 0; +}; + +static int rtl2832_sdr_set_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.init) + fe->ops.tuner_ops.init(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_tuner_freq(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; + + s->sequence = 0; + + ret = rtl2832_sdr_submit_urbs(s); + if (ret) + goto err; + +err: + mutex_unlock(&s->v4l2_lock); + + return ret; +} + +static void 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__); + + mutex_lock(&s->v4l2_lock); + + 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_adc(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); +} + +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_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: index=%d type=%d\n", + __func__, v->index, v->type); + + if (v->index == 0) { + strlcpy(v->name, "ADC: Realtek RTL2832", sizeof(v->name)); + v->type = V4L2_TUNER_ADC; + v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; + v->rangelow = 300000; + v->rangehigh = 3200000; + } else if (v->index == 1) { + strlcpy(v->name, "RF: <unknown>", sizeof(v->name)); + v->type = V4L2_TUNER_RF; + v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; + v->rangelow = 50000000; + v->rangehigh = 2000000000; + } else { + return -EINVAL; + } + + return 0; +} + +static int rtl2832_sdr_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__); + + if (v->index > 1) + return -EINVAL; + return 0; +} + +static int rtl2832_sdr_enum_freq_bands(struct file *file, void *priv, + struct v4l2_frequency_band *band) +{ + struct rtl2832_sdr_state *s = video_drvdata(file); + + dev_dbg(&s->udev->dev, "%s: tuner=%d type=%d index=%d\n", + __func__, band->tuner, band->type, band->index); + + if (band->tuner == 0) { + if (band->index >= ARRAY_SIZE(bands_adc)) + return -EINVAL; + + *band = bands_adc[band->index]; + } else if (band->tuner == 1) { + if (band->index >= ARRAY_SIZE(bands_fm)) + return -EINVAL; + + *band = bands_fm[band->index]; + } else { + return -EINVAL; + } + + return 0; +} + +static int rtl2832_sdr_g_frequency(struct file *file, void *priv, + struct v4l2_frequency *f) +{ + struct rtl2832_sdr_state *s = video_drvdata(file); + int ret = 0; + + dev_dbg(&s->udev->dev, "%s: tuner=%d type=%d\n", + __func__, f->tuner, f->type); + + if (f->tuner == 0) { + f->frequency = s->f_adc; + f->type = V4L2_TUNER_ADC; + } else if (f->tuner == 1) { + f->frequency = s->f_tuner; + f->type = V4L2_TUNER_RF; + } else { + return -EINVAL; + } + + return ret; +} + +static int rtl2832_sdr_s_frequency(struct file *file, void *priv, + const struct v4l2_frequency *f) +{ + struct rtl2832_sdr_state *s = video_drvdata(file); + int ret, band; + + dev_dbg(&s->udev->dev, "%s: tuner=%d type=%d frequency=%u\n", + __func__, f->tuner, f->type, f->frequency); + + /* ADC band midpoints */ + #define BAND_ADC_0 ((bands_adc[0].rangehigh + bands_adc[1].rangelow) / 2) + #define BAND_ADC_1 ((bands_adc[1].rangehigh + bands_adc[2].rangelow) / 2) + + if (f->tuner == 0 && f->type == V4L2_TUNER_ADC) { + if (f->frequency < BAND_ADC_0) + band = 0; + else if (f->frequency < BAND_ADC_1) + band = 1; + else + band = 2; + + s->f_adc = clamp_t(unsigned int, f->frequency, + bands_adc[band].rangelow, + bands_adc[band].rangehigh); + + dev_dbg(&s->udev->dev, "%s: ADC frequency=%u Hz\n", + __func__, s->f_adc); + ret = rtl2832_sdr_set_adc(s); + } else if (f->tuner == 1) { + s->f_tuner = clamp_t(unsigned int, f->frequency, + bands_fm[0].rangelow, + bands_fm[0].rangehigh); + dev_dbg(&s->udev->dev, "%s: RF frequency=%u Hz\n", + __func__, f->frequency); + + ret = rtl2832_sdr_set_tuner_freq(s); + } else { + ret = -EINVAL; + } + + return ret; +} + +static int rtl2832_sdr_enum_fmt_sdr_cap(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + struct rtl2832_sdr_state *s = video_drvdata(file); + + dev_dbg(&s->udev->dev, "%s:\n", __func__); + + if (f->index >= s->num_formats) + return -EINVAL; + + strlcpy(f->description, formats[f->index].name, sizeof(f->description)); + f->pixelformat = formats[f->index].pixelformat; + + return 0; +} + +static int rtl2832_sdr_g_fmt_sdr_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct rtl2832_sdr_state *s = video_drvdata(file); + + dev_dbg(&s->udev->dev, "%s:\n", __func__); + + f->fmt.sdr.pixelformat = s->pixelformat; + f->fmt.sdr.buffersize = s->buffersize; + + memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved)); + + return 0; +} + +static int rtl2832_sdr_s_fmt_sdr_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct rtl2832_sdr_state *s = video_drvdata(file); + struct vb2_queue *q = &s->vb_queue; + int i; + + dev_dbg(&s->udev->dev, "%s: pixelformat fourcc %4.4s\n", __func__, + (char *)&f->fmt.sdr.pixelformat); + + if (vb2_is_busy(q)) + return -EBUSY; + + memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved)); + for (i = 0; i < s->num_formats; i++) { + if (formats[i].pixelformat == f->fmt.sdr.pixelformat) { + s->pixelformat = formats[i].pixelformat; + s->buffersize = formats[i].buffersize; + f->fmt.sdr.buffersize = formats[i].buffersize; + return 0; + } + } + + s->pixelformat = formats[0].pixelformat; + s->buffersize = formats[0].buffersize; + f->fmt.sdr.pixelformat = formats[0].pixelformat; + f->fmt.sdr.buffersize = formats[0].buffersize; + + return 0; +} + +static int rtl2832_sdr_try_fmt_sdr_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct rtl2832_sdr_state *s = video_drvdata(file); + int i; + + dev_dbg(&s->udev->dev, "%s: pixelformat fourcc %4.4s\n", __func__, + (char *)&f->fmt.sdr.pixelformat); + + memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved)); + for (i = 0; i < s->num_formats; i++) { + if (formats[i].pixelformat == f->fmt.sdr.pixelformat) { + f->fmt.sdr.buffersize = formats[i].buffersize; + return 0; + } + } + + f->fmt.sdr.pixelformat = formats[0].pixelformat; + f->fmt.sdr.buffersize = formats[0].buffersize; + + return 0; +} + +static const struct v4l2_ioctl_ops rtl2832_sdr_ioctl_ops = { + .vidioc_querycap = rtl2832_sdr_querycap, + + .vidioc_enum_fmt_sdr_cap = rtl2832_sdr_enum_fmt_sdr_cap, + .vidioc_g_fmt_sdr_cap = rtl2832_sdr_g_fmt_sdr_cap, + .vidioc_s_fmt_sdr_cap = rtl2832_sdr_s_fmt_sdr_cap, + .vidioc_try_fmt_sdr_cap = rtl2832_sdr_try_fmt_sdr_cap, + + .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 = rtl2832_sdr_g_tuner, + .vidioc_s_tuner = rtl2832_sdr_s_tuner, + + .vidioc_enum_freq_bands = rtl2832_sdr_enum_freq_bands, + .vidioc_g_frequency = rtl2832_sdr_g_frequency, + .vidioc_s_frequency = rtl2832_sdr_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 RTL2832 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, + hdl); + struct dvb_frontend *fe = s->fe; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + int ret; + + dev_dbg(&s->udev->dev, + "%s: id=%d name=%s val=%d min=%lld max=%lld step=%lld\n", + __func__, ctrl->id, ctrl->name, ctrl->val, + ctrl->minimum, ctrl->maximum, ctrl->step); + + switch (ctrl->id) { + case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: + case V4L2_CID_RF_TUNER_BANDWIDTH: + /* TODO: these controls should be moved to tuner drivers */ + if (s->bandwidth_auto->val) { + /* Round towards the closest legal value */ + s32 val = s->f_adc + div_u64(s->bandwidth->step, 2); + u32 offset; + + val = clamp_t(s32, val, s->bandwidth->minimum, + s->bandwidth->maximum); + offset = val - s->bandwidth->minimum; + offset = s->bandwidth->step * + div_u64(offset, s->bandwidth->step); + s->bandwidth->val = s->bandwidth->minimum + offset; + } + c->bandwidth_hz = s->bandwidth->val; + + if (!test_bit(POWER_ON, &s->flags)) + return 0; + + if (fe->ops.tuner_ops.set_params) + ret = fe->ops.tuner_ops.set_params(fe); + else + ret = 0; + 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->hdl); + 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_config *cfg, + struct v4l2_subdev *sd) +{ + int ret; + struct rtl2832_sdr_state *s; + const struct v4l2_ctrl_ops *ops = &rtl2832_sdr_ctrl_ops; + struct dvb_usb_device *d = i2c_get_adapdata(i2c); + + 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 NULL; + } + + /* setup the state */ + s->fe = fe; + s->d = d; + s->udev = d->udev; + s->i2c = i2c; + s->cfg = cfg; + s->f_adc = bands_adc[0].rangelow; + s->f_tuner = bands_fm[0].rangelow; + s->pixelformat = formats[0].pixelformat; + s->buffersize = formats[0].buffersize; + s->num_formats = NUM_FORMATS; + if (rtl2832_sdr_emulated_fmt == false) + s->num_formats -= 1; + + 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_SDR_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_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + ret = vb2_queue_init(&s->vb_queue); + if (ret) { + dev_err(&s->udev->dev, "Could not initialize vb2 queue\n"); + goto err_free_mem; + } + + /* Register controls */ + switch (s->cfg->tuner) { + case RTL2832_TUNER_E4000: + v4l2_ctrl_handler_init(&s->hdl, 9); + if (sd) + v4l2_ctrl_add_handler(&s->hdl, sd->ctrl_handler, NULL); + break; + case RTL2832_TUNER_R820T: + v4l2_ctrl_handler_init(&s->hdl, 2); + s->bandwidth_auto = v4l2_ctrl_new_std(&s->hdl, ops, + V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, + 0, 1, 1, 1); + s->bandwidth = v4l2_ctrl_new_std(&s->hdl, ops, + V4L2_CID_RF_TUNER_BANDWIDTH, + 0, 8000000, 100000, 0); + v4l2_ctrl_auto_cluster(2, &s->bandwidth_auto, 0, false); + break; + case RTL2832_TUNER_FC0012: + case RTL2832_TUNER_FC0013: + v4l2_ctrl_handler_init(&s->hdl, 2); + s->bandwidth_auto = v4l2_ctrl_new_std(&s->hdl, ops, + V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, + 0, 1, 1, 1); + s->bandwidth = v4l2_ctrl_new_std(&s->hdl, ops, + V4L2_CID_RF_TUNER_BANDWIDTH, + 6000000, 8000000, 1000000, + 6000000); + v4l2_ctrl_auto_cluster(2, &s->bandwidth_auto, 0, false); + break; + default: + v4l2_ctrl_handler_init(&s->hdl, 0); + dev_notice(&s->udev->dev, "%s: Unsupported tuner\n", + KBUILD_MODNAME); + goto err_free_controls; + } + + if (s->hdl.error) { + ret = s->hdl.error; + dev_err(&s->udev->dev, "Could not initialize controls\n"); + goto err_free_controls; + } + + /* Init video_device structure */ + s->vdev = rtl2832_sdr_template; + s->vdev.queue = &s->vb_queue; + s->vdev.queue->lock = &s->vb_queue_lock; + video_set_drvdata(&s->vdev, s); + + /* 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->hdl; + s->vdev.v4l2_dev = &s->v4l2_dev; + s->vdev.lock = &s->v4l2_lock; + s->vdev.vfl_dir = VFL_DIR_RX; + + ret = video_register_device(&s->vdev, VFL_TYPE_SDR, -1); + if (ret) { + 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); + dev_notice(&s->udev->dev, + "%s: SDR API is still slightly experimental and functionality changes may follow\n", + KBUILD_MODNAME); + return fe; + +err_unregister_v4l2_dev: + v4l2_device_unregister(&s->v4l2_dev); +err_free_controls: + v4l2_ctrl_handler_free(&s->hdl); +err_free_mem: + kfree(s); + return NULL; +} +EXPORT_SYMBOL(rtl2832_sdr_attach); + +MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); +MODULE_DESCRIPTION("Realtek RTL2832 SDR driver"); +MODULE_LICENSE("GPL"); |