From 977e444f59ad16eedf66acae4f357011c74da291 Mon Sep 17 00:00:00 2001 From: Antti Palosaari Date: Fri, 5 Jul 2013 00:24:08 -0300 Subject: [PATCH] [media] Mirics MSi3101 SDR Dongle driver It is first Kernel software defined radio receiver driver. That device is sold as a digital television solution. MSi3101 is reference design which consists of two chips: 1) MSi2500 USB ADC 2) MSi001 RF-tuner Driver is put to staging as API is not ready. Signed-off-by: Antti Palosaari Signed-off-by: Mauro Carvalho Chehab --- drivers/staging/media/Kconfig | 2 + drivers/staging/media/Makefile | 1 + drivers/staging/media/msi3101/Kconfig | 3 + drivers/staging/media/msi3101/Makefile | 1 + drivers/staging/media/msi3101/sdr-msi3101.c | 1618 +++++++++++++++++++ 5 files changed, 1625 insertions(+) create mode 100644 drivers/staging/media/msi3101/Kconfig create mode 100644 drivers/staging/media/msi3101/Makefile create mode 100644 drivers/staging/media/msi3101/sdr-msi3101.c diff --git a/drivers/staging/media/Kconfig b/drivers/staging/media/Kconfig index ae0abc350e34..46f1e619cbd8 100644 --- a/drivers/staging/media/Kconfig +++ b/drivers/staging/media/Kconfig @@ -29,6 +29,8 @@ source "drivers/staging/media/dt3155v4l/Kconfig" source "drivers/staging/media/go7007/Kconfig" +source "drivers/staging/media/msi3101/Kconfig" + source "drivers/staging/media/solo6x10/Kconfig" # Keep LIRC at the end, as it has sub-menus diff --git a/drivers/staging/media/Makefile b/drivers/staging/media/Makefile index 2b97cae99499..eb7f30b1ccd8 100644 --- a/drivers/staging/media/Makefile +++ b/drivers/staging/media/Makefile @@ -4,4 +4,5 @@ obj-$(CONFIG_LIRC_STAGING) += lirc/ obj-$(CONFIG_SOLO6X10) += solo6x10/ obj-$(CONFIG_VIDEO_DT3155) += dt3155v4l/ obj-$(CONFIG_VIDEO_GO7007) += go7007/ +obj-$(CONFIG_USB_MSI3101) += msi3101/ obj-$(CONFIG_VIDEO_DM365_VPFE) += davinci_vpfe/ diff --git a/drivers/staging/media/msi3101/Kconfig b/drivers/staging/media/msi3101/Kconfig new file mode 100644 index 000000000000..b94a95a597d6 --- /dev/null +++ b/drivers/staging/media/msi3101/Kconfig @@ -0,0 +1,3 @@ +config USB_MSI3101 + tristate "Mirics MSi3101 SDR Dongle" + depends on USB && VIDEO_DEV && VIDEO_V4L2 diff --git a/drivers/staging/media/msi3101/Makefile b/drivers/staging/media/msi3101/Makefile new file mode 100644 index 000000000000..3730654b0eb9 --- /dev/null +++ b/drivers/staging/media/msi3101/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_USB_MSI3101) += sdr-msi3101.o diff --git a/drivers/staging/media/msi3101/sdr-msi3101.c b/drivers/staging/media/msi3101/sdr-msi3101.c new file mode 100644 index 000000000000..46fdb6cac95e --- /dev/null +++ b/drivers/staging/media/msi3101/sdr-msi3101.c @@ -0,0 +1,1618 @@ +/* + * Mirics MSi3101 SDR Dongle driver + * + * Copyright (C) 2013 Antti Palosaari + * + * 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. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct msi3101_gain { + u8 tot:7; + u8 baseband:6; + bool lna:1; + bool mixer:1; +}; + +/* 60 – 120 MHz band, lna 24dB, mixer 19dB */ +static const struct msi3101_gain msi3101_gain_lut_120[] = { + { 0, 0, 0, 0}, + { 1, 1, 0, 0}, + { 2, 2, 0, 0}, + { 3, 3, 0, 0}, + { 4, 4, 0, 0}, + { 5, 5, 0, 0}, + { 6, 6, 0, 0}, + { 7, 7, 0, 0}, + { 8, 8, 0, 0}, + { 9, 9, 0, 0}, + { 10, 10, 0, 0}, + { 11, 11, 0, 0}, + { 12, 12, 0, 0}, + { 13, 13, 0, 0}, + { 14, 14, 0, 0}, + { 15, 15, 0, 0}, + { 16, 16, 0, 0}, + { 17, 17, 0, 0}, + { 18, 18, 0, 0}, + { 19, 19, 0, 0}, + { 20, 20, 0, 0}, + { 21, 21, 0, 0}, + { 22, 22, 0, 0}, + { 23, 23, 0, 0}, + { 24, 24, 0, 0}, + { 25, 25, 0, 0}, + { 26, 26, 0, 0}, + { 27, 27, 0, 0}, + { 28, 28, 0, 0}, + { 29, 5, 1, 0}, + { 30, 6, 1, 0}, + { 31, 7, 1, 0}, + { 32, 8, 1, 0}, + { 33, 9, 1, 0}, + { 34, 10, 1, 0}, + { 35, 11, 1, 0}, + { 36, 12, 1, 0}, + { 37, 13, 1, 0}, + { 38, 14, 1, 0}, + { 39, 15, 1, 0}, + { 40, 16, 1, 0}, + { 41, 17, 1, 0}, + { 42, 18, 1, 0}, + { 43, 19, 1, 0}, + { 44, 20, 1, 0}, + { 45, 21, 1, 0}, + { 46, 22, 1, 0}, + { 47, 23, 1, 0}, + { 48, 24, 1, 0}, + { 49, 25, 1, 0}, + { 50, 26, 1, 0}, + { 51, 27, 1, 0}, + { 52, 28, 1, 0}, + { 53, 29, 1, 0}, + { 54, 30, 1, 0}, + { 55, 31, 1, 0}, + { 56, 32, 1, 0}, + { 57, 33, 1, 0}, + { 58, 34, 1, 0}, + { 59, 35, 1, 0}, + { 60, 36, 1, 0}, + { 61, 37, 1, 0}, + { 62, 38, 1, 0}, + { 63, 39, 1, 0}, + { 64, 40, 1, 0}, + { 65, 41, 1, 0}, + { 66, 42, 1, 0}, + { 67, 43, 1, 0}, + { 68, 44, 1, 0}, + { 69, 45, 1, 0}, + { 70, 46, 1, 0}, + { 71, 47, 1, 0}, + { 72, 48, 1, 0}, + { 73, 49, 1, 0}, + { 74, 50, 1, 0}, + { 75, 51, 1, 0}, + { 76, 52, 1, 0}, + { 77, 53, 1, 0}, + { 78, 54, 1, 0}, + { 79, 55, 1, 0}, + { 80, 56, 1, 0}, + { 81, 57, 1, 0}, + { 82, 58, 1, 0}, + { 83, 40, 1, 1}, + { 84, 41, 1, 1}, + { 85, 42, 1, 1}, + { 86, 43, 1, 1}, + { 87, 44, 1, 1}, + { 88, 45, 1, 1}, + { 89, 46, 1, 1}, + { 90, 47, 1, 1}, + { 91, 48, 1, 1}, + { 92, 49, 1, 1}, + { 93, 50, 1, 1}, + { 94, 51, 1, 1}, + { 95, 52, 1, 1}, + { 96, 53, 1, 1}, + { 97, 54, 1, 1}, + { 98, 55, 1, 1}, + { 99, 56, 1, 1}, + {100, 57, 1, 1}, + {101, 58, 1, 1}, + {102, 59, 1, 1}, +}; + +/* 120 – 245 MHz band, lna 24dB, mixer 19dB */ +static const struct msi3101_gain msi3101_gain_lut_245[] = { + { 0, 0, 0, 0}, + { 1, 1, 0, 0}, + { 2, 2, 0, 0}, + { 3, 3, 0, 0}, + { 4, 4, 0, 0}, + { 5, 5, 0, 0}, + { 6, 6, 0, 0}, + { 7, 7, 0, 0}, + { 8, 8, 0, 0}, + { 9, 9, 0, 0}, + { 10, 10, 0, 0}, + { 11, 11, 0, 0}, + { 12, 12, 0, 0}, + { 13, 13, 0, 0}, + { 14, 14, 0, 0}, + { 15, 15, 0, 0}, + { 16, 16, 0, 0}, + { 17, 17, 0, 0}, + { 18, 18, 0, 0}, + { 19, 19, 0, 0}, + { 20, 20, 0, 0}, + { 21, 21, 0, 0}, + { 22, 22, 0, 0}, + { 23, 23, 0, 0}, + { 24, 24, 0, 0}, + { 25, 25, 0, 0}, + { 26, 26, 0, 0}, + { 27, 27, 0, 0}, + { 28, 28, 0, 0}, + { 29, 5, 1, 0}, + { 30, 6, 1, 0}, + { 31, 7, 1, 0}, + { 32, 8, 1, 0}, + { 33, 9, 1, 0}, + { 34, 10, 1, 0}, + { 35, 11, 1, 0}, + { 36, 12, 1, 0}, + { 37, 13, 1, 0}, + { 38, 14, 1, 0}, + { 39, 15, 1, 0}, + { 40, 16, 1, 0}, + { 41, 17, 1, 0}, + { 42, 18, 1, 0}, + { 43, 19, 1, 0}, + { 44, 20, 1, 0}, + { 45, 21, 1, 0}, + { 46, 22, 1, 0}, + { 47, 23, 1, 0}, + { 48, 24, 1, 0}, + { 49, 25, 1, 0}, + { 50, 26, 1, 0}, + { 51, 27, 1, 0}, + { 52, 28, 1, 0}, + { 53, 29, 1, 0}, + { 54, 30, 1, 0}, + { 55, 31, 1, 0}, + { 56, 32, 1, 0}, + { 57, 33, 1, 0}, + { 58, 34, 1, 0}, + { 59, 35, 1, 0}, + { 60, 36, 1, 0}, + { 61, 37, 1, 0}, + { 62, 38, 1, 0}, + { 63, 39, 1, 0}, + { 64, 40, 1, 0}, + { 65, 41, 1, 0}, + { 66, 42, 1, 0}, + { 67, 43, 1, 0}, + { 68, 44, 1, 0}, + { 69, 45, 1, 0}, + { 70, 46, 1, 0}, + { 71, 47, 1, 0}, + { 72, 48, 1, 0}, + { 73, 49, 1, 0}, + { 74, 50, 1, 0}, + { 75, 51, 1, 0}, + { 76, 52, 1, 0}, + { 77, 53, 1, 0}, + { 78, 54, 1, 0}, + { 79, 55, 1, 0}, + { 80, 56, 1, 0}, + { 81, 57, 1, 0}, + { 82, 58, 1, 0}, + { 83, 40, 1, 1}, + { 84, 41, 1, 1}, + { 85, 42, 1, 1}, + { 86, 43, 1, 1}, + { 87, 44, 1, 1}, + { 88, 45, 1, 1}, + { 89, 46, 1, 1}, + { 90, 47, 1, 1}, + { 91, 48, 1, 1}, + { 92, 49, 1, 1}, + { 93, 50, 1, 1}, + { 94, 51, 1, 1}, + { 95, 52, 1, 1}, + { 96, 53, 1, 1}, + { 97, 54, 1, 1}, + { 98, 55, 1, 1}, + { 99, 56, 1, 1}, + {100, 57, 1, 1}, + {101, 58, 1, 1}, + {102, 59, 1, 1}, +}; + +/* 420 – 1000 MHz band, lna 7dB, mixer 19dB */ +static const struct msi3101_gain msi3101_gain_lut_1000[] = { + { 0, 0, 0, 0}, + { 1, 1, 0, 0}, + { 2, 2, 0, 0}, + { 3, 3, 0, 0}, + { 4, 4, 0, 0}, + { 5, 5, 0, 0}, + { 6, 6, 0, 0}, + { 7, 7, 0, 0}, + { 8, 8, 0, 0}, + { 9, 9, 0, 0}, + { 10, 10, 0, 0}, + { 11, 11, 0, 0}, + { 12, 5, 1, 0}, + { 13, 6, 1, 0}, + { 14, 7, 1, 0}, + { 15, 8, 1, 0}, + { 16, 9, 1, 0}, + { 17, 10, 1, 0}, + { 18, 11, 1, 0}, + { 19, 12, 1, 0}, + { 20, 13, 1, 0}, + { 21, 14, 1, 0}, + { 22, 15, 1, 0}, + { 23, 16, 1, 0}, + { 24, 17, 1, 0}, + { 25, 18, 1, 0}, + { 26, 19, 1, 0}, + { 27, 20, 1, 0}, + { 28, 21, 1, 0}, + { 29, 22, 1, 0}, + { 30, 23, 1, 0}, + { 31, 24, 1, 0}, + { 32, 25, 1, 0}, + { 33, 26, 1, 0}, + { 34, 27, 1, 0}, + { 35, 28, 1, 0}, + { 36, 29, 1, 0}, + { 37, 30, 1, 0}, + { 38, 31, 1, 0}, + { 39, 32, 1, 0}, + { 40, 33, 1, 0}, + { 41, 34, 1, 0}, + { 42, 35, 1, 0}, + { 43, 36, 1, 0}, + { 44, 37, 1, 0}, + { 45, 38, 1, 0}, + { 46, 39, 1, 0}, + { 47, 40, 1, 0}, + { 48, 41, 1, 0}, + { 49, 42, 1, 0}, + { 50, 43, 1, 0}, + { 51, 44, 1, 0}, + { 52, 45, 1, 0}, + { 53, 46, 1, 0}, + { 54, 47, 1, 0}, + { 55, 48, 1, 0}, + { 56, 49, 1, 0}, + { 57, 50, 1, 0}, + { 58, 51, 1, 0}, + { 59, 52, 1, 0}, + { 60, 53, 1, 0}, + { 61, 54, 1, 0}, + { 62, 55, 1, 0}, + { 63, 56, 1, 0}, + { 64, 57, 1, 0}, + { 65, 58, 1, 0}, + { 66, 40, 1, 1}, + { 67, 41, 1, 1}, + { 68, 42, 1, 1}, + { 69, 43, 1, 1}, + { 70, 44, 1, 1}, + { 71, 45, 1, 1}, + { 72, 46, 1, 1}, + { 73, 47, 1, 1}, + { 74, 48, 1, 1}, + { 75, 49, 1, 1}, + { 76, 50, 1, 1}, + { 77, 51, 1, 1}, + { 78, 52, 1, 1}, + { 79, 53, 1, 1}, + { 80, 54, 1, 1}, + { 81, 55, 1, 1}, + { 82, 56, 1, 1}, + { 83, 57, 1, 1}, + { 84, 58, 1, 1}, + { 85, 59, 1, 1}, +}; + +/* + * iConfiguration 0 + * bInterfaceNumber 0 + * bAlternateSetting 1 + * bNumEndpoints 1 + * bEndpointAddress 0x81 EP 1 IN + * bmAttributes 1 + * Transfer Type Isochronous + * wMaxPacketSize 0x1400 3x 1024 bytes + * bInterval 1 + */ +#define MAX_ISO_BUFS (8) +#define ISO_FRAMES_PER_DESC (8) +#define ISO_MAX_FRAME_SIZE (3 * 1024) +#define ISO_BUFFER_SIZE (ISO_FRAMES_PER_DESC * ISO_MAX_FRAME_SIZE) + +#define MAX_ISOC_ERRORS 20 + +#define MSI3101_CID_SAMPLING_RATE ((V4L2_CID_USER_BASE | 0xf000) + 0) +#define MSI3101_CID_SAMPLING_RESOLUTION ((V4L2_CID_USER_BASE | 0xf000) + 1) +#define MSI3101_CID_TUNER_RF ((V4L2_CID_USER_BASE | 0xf000) + 10) +#define MSI3101_CID_TUNER_BW ((V4L2_CID_USER_BASE | 0xf000) + 11) +#define MSI3101_CID_TUNER_IF ((V4L2_CID_USER_BASE | 0xf000) + 12) +#define MSI3101_CID_TUNER_GAIN ((V4L2_CID_USER_BASE | 0xf000) + 13) + +/* intermediate buffers with raw data from the USB device */ +struct msi3101_frame_buf { + struct vb2_buffer vb; /* common v4l buffer stuff -- must be first */ + struct list_head list; + void *data; /* raw data from USB device */ + int filled; /* number of bytes filled to *data */ +}; + +struct msi3101_state { + 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 isoc_errors; /* number of contiguous ISOC errors */ + unsigned int vb_full; /* vb is full and packets dropped */ + + struct urb *urbs[MAX_ISO_BUFS]; + + /* 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; + + u32 symbol_received; /* for track lost packets */ + u32 symbol; /* for symbol rate calc */ + unsigned long jiffies; +}; + +/* Private functions */ +static struct msi3101_frame_buf *msi3101_get_next_fill_buf( + struct msi3101_state *s) +{ + unsigned long flags = 0; + struct msi3101_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 msi3101_frame_buf, list); + list_del(&buf->list); +leave: + spin_unlock_irqrestore(&s->queued_bufs_lock, flags); + return buf; +} + +/* + * Converts signed 10-bit integer into 32-bit IEEE floating point + * representation. + * Will be exact from 0 to 2^24. Above that, we round towards zero + * as the fractional bits will not fit in a float. (It would be better to + * round towards even as the fpu does, but that is slower.) + */ +#define I2F_FRAC_BITS 23 +#define I2F_MASK ((1 << I2F_FRAC_BITS) - 1) +static uint32_t msi3101_int2float(uint32_t x) +{ + uint32_t msb, exponent, fraction, sign; + + /* Zero is special */ + if (!x) + return 0; + + /* Negative / positive value */ + if (x & 0x200) { + x = -x; + x &= 0x3ff; + sign = 1 << 31; + } else { + sign = 0 << 31; + } + + /* Get location of the most significant bit */ + msb = __fls(x); + + /* + * Use a rotate instead of a shift because that works both leftwards + * and rightwards due to the mod(32) behaviour. This means we don't + * need to check to see if we are above 2^24 or not. + */ + fraction = ror32(x, (msb - I2F_FRAC_BITS) & 0x1f) & I2F_MASK; + exponent = (127 + msb) << I2F_FRAC_BITS; + + return (fraction + exponent) | sign; +} + +#define MSI3101_CONVERT_IN_URB_HANDLER +#define MSI3101_EXTENSIVE_DEBUG +static int msi3101_convert_stream(struct msi3101_state *s, u32 *dst, + const u8 *src, unsigned int src_len) +{ + int i, j, k, l, i_max, dst_len = 0; + u16 sample[4]; +#ifdef MSI3101_EXTENSIVE_DEBUG + u32 symbol[3]; +#endif + /* There could be 1-3 1024 bytes URB frames */ + i_max = src_len / 1024; + for (i = 0; i < i_max; i++) { +#ifdef MSI3101_EXTENSIVE_DEBUG + symbol[i] = src[3] << 24 | src[2] << 16 | src[1] << 8 | src[0] << 0; + if (i == 0 && s->symbol_received != symbol[0]) { + dev_dbg(&s->udev->dev, + "%d symbols lost, %d %08x:%08x\n", + symbol[0] - s->symbol_received, + src_len, s->symbol_received, symbol[0]); + } +#endif + src += 16; + for (j = 0; j < 6; j++) { + for (k = 0; k < 16; k++) { + for (l = 0; l < 10; l += 5) { + sample[0] = (src[l + 0] & 0xff) >> 0 | (src[l + 1] & 0x03) << 8; + sample[1] = (src[l + 1] & 0xfc) >> 2 | (src[l + 2] & 0x0f) << 6; + sample[2] = (src[l + 2] & 0xf0) >> 4 | (src[l + 3] & 0x3f) << 4; + sample[3] = (src[l + 3] & 0xc0) >> 6 | (src[l + 4] & 0xff) << 2; + + *dst++ = msi3101_int2float(sample[0]); + *dst++ = msi3101_int2float(sample[1]); + *dst++ = msi3101_int2float(sample[2]); + *dst++ = msi3101_int2float(sample[3]); + + /* 4 x 32bit float samples */ + dst_len += 4 * 4; + } + src += 10; + } +#ifdef MSI3101_EXTENSIVE_DEBUG + if (memcmp(src, "\xff\xff\xff\xff", 4) && memcmp(src, "\x00\x00\x00\x00", 4)) + dev_dbg_ratelimited(&s->udev->dev, + "padding %*ph\n", 4, src); +#endif + src += 4; + } + src += 24; + } + +#ifdef MSI3101_EXTENSIVE_DEBUG + /* calculate symbol 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 symbols = symbol[i_max - 1] - s->symbol; + s->jiffies = jiffies_now; + s->symbol = symbol[i_max - 1]; + dev_dbg(&s->udev->dev, + "slen=%d symbols=%u msecs=%lu symbolrate=%lu\n", + src_len, symbols, msecs, + symbols * 1000UL / msecs); + } + + /* last received symbol (symbol = symbol + i * 384) */ + s->symbol_received = symbol[i_max - 1] + 384; +#endif + return dst_len; +} + +/* + * This gets called for the Isochronous pipe (stream). This is done in interrupt + * time, so it has to be fast, not crash, and not stall. Neat. + */ +static void msi3101_isoc_handler(struct urb *urb) +{ + struct msi3101_state *s = (struct msi3101_state *)urb->context; + int i, flen, fstatus; + unsigned char *iso_buf = NULL; + struct msi3101_frame_buf *fbuf; + + if (urb->status == -ENOENT || urb->status == -ECONNRESET || + urb->status == -ESHUTDOWN) { + dev_dbg(&s->udev->dev, "URB (%p) unlinked %ssynchronuously\n", + urb, urb->status == -ENOENT ? "" : "a"); + return; + } + + if (urb->status != 0) { + dev_dbg(&s->udev->dev, + "msi3101_isoc_handler() called with status %d\n", + urb->status); + /* Give up after a number of contiguous errors */ + if (++s->isoc_errors > MAX_ISOC_ERRORS) + dev_dbg(&s->udev->dev, + "Too many ISOC errors, bailing out\n"); + goto handler_end; + } else { + /* Reset ISOC error counter. We did get here, after all. */ + s->isoc_errors = 0; + } + + /* Compact data */ + for (i = 0; i < urb->number_of_packets; i++) { + /* Check frame error */ + fstatus = urb->iso_frame_desc[i].status; + if (fstatus) { + dev_dbg(&s->udev->dev, + "frame=%d/%d has error %d skipping\n", + i, urb->number_of_packets, fstatus); + goto skip; + } + + /* Check if that frame contains data */ + flen = urb->iso_frame_desc[i].actual_length; + if (flen == 0) + goto skip; + + iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset; + + /* Get free framebuffer */ + fbuf = msi3101_get_next_fill_buf(s); + if (fbuf == NULL) { + s->vb_full++; + dev_dbg_ratelimited(&s->udev->dev, + "videobuf is full, %d packets dropped\n", + s->vb_full); + goto skip; + } + + /* fill framebuffer */ +#ifdef MSI3101_CONVERT_IN_URB_HANDLER + vb2_set_plane_payload(&fbuf->vb, 0, + msi3101_convert_stream(s, + vb2_plane_vaddr(&fbuf->vb, 0), iso_buf, flen)); +#else + memcpy(fbuf->data, iso_buf, flen); + fbuf->filled = flen; +#endif + vb2_buffer_done(&fbuf->vb, VB2_BUF_STATE_DONE); +skip: + ; + } + +handler_end: + i = usb_submit_urb(urb, GFP_ATOMIC); + if (i != 0) + dev_dbg(&s->udev->dev, + "Error (%d) re-submitting urb in msi3101_isoc_handler\n", + i); +} + +static void msi3101_iso_stop(struct msi3101_state *s) +{ + int i; + dev_dbg(&s->udev->dev, "%s:\n", __func__); + + /* Unlinking ISOC buffers one by one */ + for (i = 0; i < MAX_ISO_BUFS; i++) { + if (s->urbs[i]) { + dev_dbg(&s->udev->dev, "Unlinking URB %p\n", + s->urbs[i]); + usb_kill_urb(s->urbs[i]); + } + } +} + +static void msi3101_iso_free(struct msi3101_state *s) +{ + int i; + dev_dbg(&s->udev->dev, "%s:\n", __func__); + + /* Freeing ISOC buffers one by one */ + for (i = 0; i < MAX_ISO_BUFS; i++) { + if (s->urbs[i]) { + dev_dbg(&s->udev->dev, "Freeing URB\n"); + if (s->urbs[i]->transfer_buffer) { + usb_free_coherent(s->udev, + s->urbs[i]->transfer_buffer_length, + s->urbs[i]->transfer_buffer, + s->urbs[i]->transfer_dma); + } + usb_free_urb(s->urbs[i]); + s->urbs[i] = NULL; + } + } +} + +/* Both v4l2_lock and vb_queue_lock should be locked when calling this */ +static void msi3101_isoc_cleanup(struct msi3101_state *s) +{ + dev_dbg(&s->udev->dev, "%s:\n", __func__); + + msi3101_iso_stop(s); + msi3101_iso_free(s); +} + +/* Both v4l2_lock and vb_queue_lock should be locked when calling this */ +static int msi3101_isoc_init(struct msi3101_state *s) +{ + struct usb_device *udev; + struct urb *urb; + int i, j, ret; + dev_dbg(&s->udev->dev, "%s:\n", __func__); + + s->isoc_errors = 0; + udev = s->udev; + + ret = usb_set_interface(s->udev, 0, 1); + if (ret < 0) + return ret; + + /* Allocate and init Isochronuous urbs */ + for (i = 0; i < MAX_ISO_BUFS; i++) { + urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL); + if (urb == NULL) { + dev_err(&s->udev->dev, + "Failed to allocate urb %d\n", i); + msi3101_isoc_cleanup(s); + return -ENOMEM; + } + s->urbs[i] = urb; + dev_dbg(&s->udev->dev, "Allocated URB at 0x%p\n", urb); + + urb->interval = 1; + urb->dev = udev; + urb->pipe = usb_rcvisocpipe(udev, 0x81); + urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP; + urb->transfer_buffer = usb_alloc_coherent(udev, ISO_BUFFER_SIZE, + GFP_KERNEL, &urb->transfer_dma); + if (urb->transfer_buffer == NULL) { + dev_err(&s->udev->dev, + "Failed to allocate urb buffer %d\n", + i); + msi3101_isoc_cleanup(s); + return -ENOMEM; + } + urb->transfer_buffer_length = ISO_BUFFER_SIZE; + urb->complete = msi3101_isoc_handler; + urb->context = s; + urb->start_frame = 0; + urb->number_of_packets = ISO_FRAMES_PER_DESC; + for (j = 0; j < ISO_FRAMES_PER_DESC; j++) { + urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE; + urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE; + } + } + + /* link */ + for (i = 0; i < MAX_ISO_BUFS; i++) { + ret = usb_submit_urb(s->urbs[i], GFP_KERNEL); + if (ret) { + dev_err(&s->udev->dev, + "isoc_init() submit_urb %d failed with error %d\n", + i, ret); + msi3101_isoc_cleanup(s); + return ret; + } + dev_dbg(&s->udev->dev, "URB 0x%p submitted.\n", s->urbs[i]); + } + + /* All is done... */ + return 0; +} + +/* Must be called with vb_queue_lock hold */ +static void msi3101_cleanup_queued_bufs(struct msi3101_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 msi3101_frame_buf *buf; + + buf = list_entry(s->queued_bufs.next, struct msi3101_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 msi3101_disconnect(struct usb_interface *intf) +{ + struct v4l2_device *v = usb_get_intfdata(intf); + struct msi3101_state *s = + container_of(v, struct msi3101_state, v4l2_dev); + 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); +} + +static int msi3101_querycap(struct file *file, void *fh, + struct v4l2_capability *cap) +{ + struct msi3101_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 msi3101_queue_setup(struct vb2_queue *vq, + const struct v4l2_format *fmt, unsigned int *nbuffers, + unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[]) +{ + struct msi3101_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(3 * 3072); /* 3 * 768 * 4 */ + dev_dbg(&s->udev->dev, "%s: nbuffers=%d sizes[0]=%d\n", + __func__, *nbuffers, sizes[0]); + return 0; +} + +static int msi3101_buf_init(struct vb2_buffer *vb) +{ + struct msi3101_state *s = vb2_get_drv_priv(vb->vb2_queue); + struct msi3101_frame_buf *fbuf = + container_of(vb, struct msi3101_frame_buf, vb); + dev_dbg(&s->udev->dev, "%s:\n", __func__); + + fbuf->data = vzalloc(ISO_MAX_FRAME_SIZE); + if (fbuf->data == NULL) + return -ENOMEM; + + return 0; +} + +static int msi3101_buf_prepare(struct vb2_buffer *vb) +{ + struct msi3101_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; +} + +/* + * +=========================================================================== + * | 00-1024 | USB packet + * +=========================================================================== + * | 00- 03 | packet address + * +--------------------------------------------------------------------------- + * | 04- 15 | garbage + * +--------------------------------------------------------------------------- + * | 16- 175 | samples + * +--------------------------------------------------------------------------- + * | 176- 179 | padding + * +--------------------------------------------------------------------------- + * | 180- 339 | samples + * +--------------------------------------------------------------------------- + * | 340- 343 | padding + * +--------------------------------------------------------------------------- + * | 344- 503 | samples + * +--------------------------------------------------------------------------- + * | 504- 507 | padding + * +--------------------------------------------------------------------------- + * | 508- 667 | samples + * +--------------------------------------------------------------------------- + * | 668- 671 | padding + * +--------------------------------------------------------------------------- + * | 672- 831 | samples + * +--------------------------------------------------------------------------- + * | 832- 835 | padding + * +--------------------------------------------------------------------------- + * | 836- 995 | samples + * +--------------------------------------------------------------------------- + * | 996- 999 | padding + * +--------------------------------------------------------------------------- + * | 1000-1024 | garbage + * +--------------------------------------------------------------------------- + * + * bytes 4 - 7 could have some meaning? + * padding is "00 00 00 00" or "ff ff ff ff" + * 6 * 16 * 2 * 4 = 768 samples. 768 * 4 = 3072 bytes + */ +#ifdef MSI3101_CONVERT_IN_URB_HANDLER +static int msi3101_buf_finish(struct vb2_buffer *vb) +{ + return 0; +} +#else +static int msi3101_buf_finish(struct vb2_buffer *vb) +{ + struct msi3101_state *s = vb2_get_drv_priv(vb->vb2_queue); + struct msi3101_frame_buf *fbuf = + container_of(vb, struct msi3101_frame_buf, vb); + int ret; + u32 *dst = vb2_plane_vaddr(&fbuf->vb, 0); + ret = msi3101_convert_stream(s, dst, fbuf->data, fbuf->filled); + vb2_set_plane_payload(&fbuf->vb, 0, ret); + return 0; +} +#endif + +static void msi3101_buf_cleanup(struct vb2_buffer *vb) +{ + struct msi3101_state *s = vb2_get_drv_priv(vb->vb2_queue); + struct msi3101_frame_buf *buf = + container_of(vb, struct msi3101_frame_buf, vb); + dev_dbg(&s->udev->dev, "%s:\n", __func__); + + vfree(buf->data); +} +static void msi3101_buf_queue(struct vb2_buffer *vb) +{ + struct msi3101_state *s = vb2_get_drv_priv(vb->vb2_queue); + struct msi3101_frame_buf *buf = + container_of(vb, struct msi3101_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); +} + +#define CMD_WREG 0x41 +#define CMD_START_STREAMING 0x43 +#define CMD_STOP_STREAMING 0x45 +#define CMD_READ_UNKNOW 0x48 + +#define msi3101_dbg_usb_control_msg(udev, r, t, v, _i, b, l) { \ + char *direction; \ + if (t == (USB_TYPE_VENDOR | USB_DIR_OUT)) \ + direction = ">>>"; \ + else \ + direction = "<<<"; \ + dev_dbg(&udev->dev, "%s: %02x %02x %02x %02x %02x %02x %02x %02x " \ + "%s %*ph\n", __func__, t, r, v & 0xff, v >> 8, \ + _i & 0xff, _i >> 8, l & 0xff, l >> 8, direction, l, b); \ +} + +static int msi3101_ctrl_msg(struct msi3101_state *s, u8 cmd, u32 data) +{ + int ret; + u8 request = cmd; + u8 requesttype = USB_DIR_OUT | USB_TYPE_VENDOR; + u16 value = (data >> 0) & 0xffff; + u16 index = (data >> 16) & 0xffff; + + msi3101_dbg_usb_control_msg(s->udev, + request, requesttype, value, index, NULL, 0); + + ret = usb_control_msg(s->udev, usb_rcvctrlpipe(s->udev, 0), + request, requesttype, value, index, NULL, 0, 2000); + + if (ret) + dev_err(&s->udev->dev, "%s: failed %d, cmd %02x, data %04x\n", + __func__, ret, cmd, data); + + return ret; +}; + +static int msi3101_tuner_write(struct msi3101_state *s, u32 data) +{ + return msi3101_ctrl_msg(s, CMD_WREG, data << 8 | 0x09); +}; + +#define F_REF 24000000 +static int msi3101_set_usb_adc(struct msi3101_state *s) +{ + int ret, div_n, div_m, div_r_out, f_sr; + u32 reg4, reg3; + /* + * FIXME: Synthesizer config is just a educated guess... + * It seems to give reasonable values when N is 5-12 and output + * divider R is 2, which means sampling rates 5-12 Msps in practise. + * + * reg 3 ADC synthesizer config + * [7:0] 0x03, register address + * [8] 1, always + * [9] ? + * [12:10] output divider + * [13] 0 ? + * [14] 0 ? + * [15] increase sr by max fract + * [16:19] N + * [23:20] ? + * [24:31] 0x01 + * + * output divider + * val div + * 0 - (invalid) + * 1 2 + * 2 3 + * 3 4 + * 4 5 + * 5 6 + * 6 7 + * 7 8 + */ + + f_sr = s->ctrl_sampling_rate->val64; + reg3 = 0x01c00303; + + for (div_n = 12; div_n > 5; div_n--) { + if (f_sr >= div_n * 1000000) + break; + } + + reg3 |= div_n << 16; + + for (div_r_out = 2; div_r_out < 8; div_r_out++) { + if (f_sr >= div_n * F_REF / div_r_out / 12) + break; + } + + reg3 |= (div_r_out - 1) << 10; + div_m = f_sr % (div_n * F_REF / div_r_out / 12); + + if (div_m >= 500000) { + reg3 |= 1 << 15; + div_m -= 500000; + } + + reg4 = ((div_m * 0x0ffffful / 500000) << 8) | 0x04; + + dev_dbg(&s->udev->dev, "%s: sr=%d n=%d m=%d r_out=%d reg4=%08x\n", + __func__, f_sr, div_n, div_m, div_r_out, reg4); + + ret = msi3101_ctrl_msg(s, CMD_WREG, 0x00608008); + if (ret) + goto err; + + ret = msi3101_ctrl_msg(s, CMD_WREG, 0x00000c05); + if (ret) + goto err; + + ret = msi3101_ctrl_msg(s, CMD_WREG, 0x00020000); + if (ret) + goto err; + + ret = msi3101_ctrl_msg(s, CMD_WREG, 0x00480102); + if (ret) + goto err; + + ret = msi3101_ctrl_msg(s, CMD_WREG, 0x00f38008); + if (ret) + goto err; + + ret = msi3101_ctrl_msg(s, CMD_WREG, 0x0000a507); + if (ret) + goto err; + + ret = msi3101_ctrl_msg(s, CMD_WREG, reg4); + if (ret) + goto err; + + ret = msi3101_ctrl_msg(s, CMD_WREG, reg3); + if (ret) + goto err; +err: + return ret; +}; + +static int msi3101_set_tuner(struct msi3101_state *s) +{ + int i, ret, len; + u32 reg, synthstep, thresh, n, frac; + u64 fsynth; + u8 mode, lo_div; + const struct msi3101_gain *gain_lut; + static const struct { + u32 rf; + u8 mode; + u8 lo_div; + } band_lut[] = { + { 30000000, 0x01, 16}, /* AM_MODE1 */ + {108000000, 0x02, 32}, /* VHF_MODE */ + {240000000, 0x04, 16}, /* B3_MODE */ + {960000000, 0x08, 4}, /* B45_MODE */ + {167500000, 0x10, 2}, /* BL_MODE */ + }; + static const struct { + u32 freq; + u8 val; + } if_freq_lut[] = { + { 0, 0x03}, /* Zero IF */ + { 450000, 0x02}, /* 450 kHz IF */ + {1620000, 0x01}, /* 1.62 MHz IF */ + {2048000, 0x00}, /* 2.048 MHz IF */ + }; + static const struct { + u32 freq; + u8 val; + } bandwidth_lut[] = { + { 200000, 0x00}, /* 200 kHz */ + { 300000, 0x01}, /* 300 kHz */ + { 600000, 0x02}, /* 600 kHz */ + {1536000, 0x03}, /* 1.536 MHz */ + {5000000, 0x04}, /* 5 MHz */ + {6000000, 0x05}, /* 6 MHz */ + {7000000, 0x06}, /* 7 MHz */ + {8000000, 0x07}, /* 8 MHz */ + }; + + unsigned int rf_freq = s->ctrl_tuner_rf->val64; + + /* + * bandwidth (Hz) + * 200000, 300000, 600000, 1536000, 5000000, 6000000, 7000000, 8000000 + */ + int bandwidth = s->ctrl_tuner_bw->val; + + /* + * intermediate frequency (Hz) + * 0, 450000, 1620000, 2048000 + */ + int if_freq = s->ctrl_tuner_if->val; + + /* + * gain reduction (dB) + * 0 - 102 below 420 MHz + * 0 - 85 above 420 MHz + */ + int gain = s->ctrl_tuner_gain->val; + + dev_dbg(&s->udev->dev, + "%s: rf_freq=%d bandwidth=%d if_freq=%d gain=%d\n", + __func__, rf_freq, bandwidth, if_freq, gain); + + ret = -EINVAL; + + for (i = 0; i < ARRAY_SIZE(band_lut); i++) { + if (rf_freq <= band_lut[i].rf) { + mode = band_lut[i].mode; + lo_div = band_lut[i].lo_div; + break; + } + } + + if (i == ARRAY_SIZE(band_lut)) + goto err; + + for (i = 0; i < ARRAY_SIZE(if_freq_lut); i++) { + if (if_freq == if_freq_lut[i].freq) { + if_freq = if_freq_lut[i].val; + break; + } + } + + if (i == ARRAY_SIZE(if_freq_lut)) + goto err; + + for (i = 0; i < ARRAY_SIZE(bandwidth_lut); i++) { + if (bandwidth == bandwidth_lut[i].freq) { + bandwidth = bandwidth_lut[i].val; + break; + } + } + + if (i == ARRAY_SIZE(bandwidth_lut)) + goto err; + + #define FSTEP 10000 + #define FREF1 24000000 + fsynth = (rf_freq + 0) * lo_div; + synthstep = FSTEP * lo_div; + thresh = (FREF1 * 4) / synthstep; + n = fsynth / (FREF1 * 4); + frac = thresh * (fsynth % (FREF1 * 4)) / (FREF1 * 4); + + if (thresh > 4095 || n > 63 || frac > 4095) { + dev_dbg(&s->udev->dev, + "%s: synth setup failed rf=%d thresh=%d n=%d frac=%d\n", + __func__, rf_freq, thresh, n, frac); + ret = -EINVAL; + goto err; + } + + ret = msi3101_tuner_write(s, 0x00000e); + ret = msi3101_tuner_write(s, 0x000003); + + reg = 0 << 0; + reg |= mode << 4; + reg |= 1 << 10; + reg |= if_freq << 12; + reg |= bandwidth << 14; + reg |= 0x02 << 17; + reg |= 0x00 << 20; + ret = msi3101_tuner_write(s, reg); + if (ret) + goto err; + + reg = 5 << 0; + reg |= thresh << 4; + reg |= 1 << 19; + reg |= 1 << 21; + ret = msi3101_tuner_write(s, reg); + if (ret) + goto err; + + reg = 2 << 0; + reg |= frac << 4; + reg |= n << 16; + ret = msi3101_tuner_write(s, reg); + if (ret) + goto err; + + if (rf_freq < 120000000) { + gain_lut = msi3101_gain_lut_120; + len = ARRAY_SIZE(msi3101_gain_lut_120); + } else if (rf_freq < 245000000) { + gain_lut = msi3101_gain_lut_245; + len = ARRAY_SIZE(msi3101_gain_lut_120); + } else { + gain_lut = msi3101_gain_lut_1000; + len = ARRAY_SIZE(msi3101_gain_lut_1000); + } + + for (i = 0; i < len; i++) { + if (gain_lut[i].tot >= gain) + break; + } + + if (i == len) + goto err; + + dev_dbg(&s->udev->dev, + "%s: gain tot=%d baseband=%d lna=%d mixer=%d\n", + __func__, gain_lut[i].tot, gain_lut[i].baseband, + gain_lut[i].lna, gain_lut[i].mixer); + + reg = 1 << 0; + reg |= gain_lut[i].baseband << 4; + reg |= 0 << 10; + reg |= gain_lut[i].mixer << 12; + reg |= gain_lut[i].lna << 13; + reg |= 4 << 14; + reg |= 0 << 17; + ret = msi3101_tuner_write(s, reg); + if (ret) + goto err; + + reg = 6 << 0; + reg |= 63 << 4; + reg |= 4095 << 10; + ret = msi3101_tuner_write(s, reg); + if (ret) + goto err; + + return 0; +err: + dev_dbg(&s->udev->dev, "%s: failed %d\n", __func__, ret); + return ret; +}; + +static int msi3101_start_streaming(struct vb2_queue *vq, unsigned int count) +{ + struct msi3101_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; + + ret = msi3101_set_usb_adc(s); + + ret = msi3101_isoc_init(s); + if (ret) + msi3101_cleanup_queued_bufs(s); + + ret = msi3101_ctrl_msg(s, CMD_START_STREAMING, 0); + + mutex_unlock(&s->v4l2_lock); + + return ret; +} + +static int msi3101_stop_streaming(struct vb2_queue *vq) +{ + struct msi3101_state *s = vb2_get_drv_priv(vq); + dev_dbg(&s->udev->dev, "%s:\n", __func__); + + if (mutex_lock_interruptible(&s->v4l2_lock)) + return -ERESTARTSYS; + + msi3101_ctrl_msg(s, CMD_STOP_STREAMING, 0); + + if (s->udev) + msi3101_isoc_cleanup(s); + + msi3101_cleanup_queued_bufs(s); + mutex_unlock(&s->v4l2_lock); + + return 0; +} + +static struct vb2_ops msi3101_vb2_ops = { + .queue_setup = msi3101_queue_setup, + .buf_init = msi3101_buf_init, + .buf_prepare = msi3101_buf_prepare, + .buf_finish = msi3101_buf_finish, + .buf_cleanup = msi3101_buf_cleanup, + .buf_queue = msi3101_buf_queue, + .start_streaming = msi3101_start_streaming, + .stop_streaming = msi3101_stop_streaming, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, +}; + +static int msi3101_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 msi3101_g_input(struct file *file, void *fh, unsigned int *i) +{ + *i = 0; + + return 0; +} + +static int msi3101_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 msi3101_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 msi3101_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 msi3101_state *s = video_drvdata(file); + dev_dbg(&s->udev->dev, "%s: frequency=%u Hz (%d)\n", + __func__, f->frequency * 625U / 10U, f->frequency); + + return v4l2_ctrl_s_ctrl_int64(s->ctrl_tuner_rf, + f->frequency * 625U / 10U); +} + +const struct v4l2_ioctl_ops msi3101_ioctl_ops = { + .vidioc_querycap = msi3101_querycap, + + .vidioc_enum_input = msi3101_enum_input, + .vidioc_g_input = msi3101_g_input, + .vidioc_s_input = msi3101_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 msi3101_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 msi3101_template = { + .name = "Mirics MSi3101 SDR Dongle", + .release = video_device_release_empty, + .fops = &msi3101_fops, + .ioctl_ops = &msi3101_ioctl_ops, +}; + +static int msi3101_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct msi3101_state *s = + container_of(ctrl->handler, struct msi3101_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 MSI3101_CID_SAMPLING_RATE: + case MSI3101_CID_SAMPLING_RESOLUTION: + ret = 0; + break; + case MSI3101_CID_TUNER_RF: + case MSI3101_CID_TUNER_BW: + case MSI3101_CID_TUNER_IF: + case MSI3101_CID_TUNER_GAIN: + ret = msi3101_set_tuner(s); + break; + default: + ret = -EINVAL; + } + + return ret; +} + +static const struct v4l2_ctrl_ops msi3101_ctrl_ops = { + .s_ctrl = msi3101_s_ctrl, +}; + +static void msi3101_video_release(struct v4l2_device *v) +{ + struct msi3101_state *s = + container_of(v, struct msi3101_state, v4l2_dev); + + v4l2_ctrl_handler_free(&s->ctrl_handler); + v4l2_device_unregister(&s->v4l2_dev); + kfree(s); +} + +static int msi3101_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + struct usb_device *udev = interface_to_usbdev(intf); + struct msi3101_state *s = NULL; + int ret; + static const struct v4l2_ctrl_config ctrl_sampling_rate = { + .ops = &msi3101_ctrl_ops, + .id = MSI3101_CID_SAMPLING_RATE, + .type = V4L2_CTRL_TYPE_INTEGER64, + .name = "Sampling Rate", + .min = 500000, + .max = 12000000, + .def = 2048000, + .step = 1, + }; + static const struct v4l2_ctrl_config ctrl_sampling_resolution = { + .ops = &msi3101_ctrl_ops, + .id = MSI3101_CID_SAMPLING_RESOLUTION, + .type = V4L2_CTRL_TYPE_INTEGER, + .flags = V4L2_CTRL_FLAG_INACTIVE, + .name = "Sampling Resolution", + .min = 10, + .max = 10, + .def = 10, + .step = 1, + }; + static const struct v4l2_ctrl_config ctrl_tuner_rf = { + .ops = &msi3101_ctrl_ops, + .id = MSI3101_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 = &msi3101_ctrl_ops, + .id = MSI3101_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 = &msi3101_ctrl_ops, + .id = MSI3101_CID_TUNER_IF, + .type = V4L2_CTRL_TYPE_INTEGER, + .flags = V4L2_CTRL_FLAG_INACTIVE, + .name = "Tuner IF", + .min = 0, + .max = 2048000, + .def = 0, + .step = 1, + }; + static const struct v4l2_ctrl_config ctrl_tuner_gain = { + .ops = &msi3101_ctrl_ops, + .id = MSI3101_CID_TUNER_GAIN, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Tuner Gain", + .min = 0, + .max = 102, + .def = 0, + .step = 1, + }; + + s = kzalloc(sizeof(struct msi3101_state), GFP_KERNEL); + if (s == NULL) { + pr_err("Could not allocate memory for msi3101_state\n"); + return -ENOMEM; + } + + mutex_init(&s->v4l2_lock); + mutex_init(&s->vb_queue_lock); + spin_lock_init(&s->queued_bufs_lock); + INIT_LIST_HEAD(&s->queued_bufs); + + s->udev = udev; + + /* 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 msi3101_frame_buf); + s->vb_queue.ops = &msi3101_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 = msi3101_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, 6); + 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 = msi3101_video_release; + ret = v4l2_device_register(&intf->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)); + + return 0; + +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 ret; +} + +/* USB device ID list */ +static struct usb_device_id msi3101_id_table[] = { + { USB_DEVICE(0x1df7, 0x2500) }, + { } +}; +MODULE_DEVICE_TABLE(usb, msi3101_id_table); + +/* USB subsystem interface */ +static struct usb_driver msi3101_driver = { + .name = KBUILD_MODNAME, + .probe = msi3101_probe, + .disconnect = msi3101_disconnect, + .id_table = msi3101_id_table, +}; + +module_usb_driver(msi3101_driver); + +MODULE_AUTHOR("Antti Palosaari "); +MODULE_DESCRIPTION("Mirics MSi3101 SDR Dongle"); +MODULE_LICENSE("GPL"); -- 2.34.1