From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- drivers/media/radio/wl128x/fmdrv_v4l2.c | 604 ++++++++++++++++++++++++++++++++ 1 file changed, 604 insertions(+) create mode 100644 drivers/media/radio/wl128x/fmdrv_v4l2.c (limited to 'drivers/media/radio/wl128x/fmdrv_v4l2.c') diff --git a/drivers/media/radio/wl128x/fmdrv_v4l2.c b/drivers/media/radio/wl128x/fmdrv_v4l2.c new file mode 100644 index 000000000..1c146d14d --- /dev/null +++ b/drivers/media/radio/wl128x/fmdrv_v4l2.c @@ -0,0 +1,604 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * FM Driver for Connectivity chip of Texas Instruments. + * This file provides interfaces to V4L2 subsystem. + * + * This module registers with V4L2 subsystem as Radio + * data system interface (/dev/radio). During the registration, + * it will expose two set of function pointers. + * + * 1) File operation related API (open, close, read, write, poll...etc). + * 2) Set of V4L2 IOCTL complaint API. + * + * Copyright (C) 2011 Texas Instruments + * Author: Raja Mani + * Author: Manjunatha Halli + */ + +#include + +#include "fmdrv.h" +#include "fmdrv_v4l2.h" +#include "fmdrv_common.h" +#include "fmdrv_rx.h" +#include "fmdrv_tx.h" + +static struct video_device gradio_dev; +static u8 radio_disconnected; + +/* -- V4L2 RADIO (/dev/radioX) device file operation interfaces --- */ + +/* Read RX RDS data */ +static ssize_t fm_v4l2_fops_read(struct file *file, char __user * buf, + size_t count, loff_t *ppos) +{ + u8 rds_mode; + int ret; + struct fmdev *fmdev; + + fmdev = video_drvdata(file); + + if (!radio_disconnected) { + fmerr("FM device is already disconnected\n"); + return -EIO; + } + + if (mutex_lock_interruptible(&fmdev->mutex)) + return -ERESTARTSYS; + + /* Turn on RDS mode if it is disabled */ + ret = fm_rx_get_rds_mode(fmdev, &rds_mode); + if (ret < 0) { + fmerr("Unable to read current rds mode\n"); + goto read_unlock; + } + + if (rds_mode == FM_RDS_DISABLE) { + ret = fmc_set_rds_mode(fmdev, FM_RDS_ENABLE); + if (ret < 0) { + fmerr("Failed to enable rds mode\n"); + goto read_unlock; + } + } + + /* Copy RDS data from internal buffer to user buffer */ + ret = fmc_transfer_rds_from_internal_buff(fmdev, file, buf, count); +read_unlock: + mutex_unlock(&fmdev->mutex); + return ret; +} + +/* Write TX RDS data */ +static ssize_t fm_v4l2_fops_write(struct file *file, const char __user * buf, + size_t count, loff_t *ppos) +{ + struct tx_rds rds; + int ret; + struct fmdev *fmdev; + + ret = copy_from_user(&rds, buf, sizeof(rds)); + rds.text[sizeof(rds.text) - 1] = '\0'; + fmdbg("(%d)type: %d, text %s, af %d\n", + ret, rds.text_type, rds.text, rds.af_freq); + if (ret) + return -EFAULT; + + fmdev = video_drvdata(file); + if (mutex_lock_interruptible(&fmdev->mutex)) + return -ERESTARTSYS; + fm_tx_set_radio_text(fmdev, rds.text, rds.text_type); + fm_tx_set_af(fmdev, rds.af_freq); + mutex_unlock(&fmdev->mutex); + + return sizeof(rds); +} + +static __poll_t fm_v4l2_fops_poll(struct file *file, struct poll_table_struct *pts) +{ + int ret; + struct fmdev *fmdev; + + fmdev = video_drvdata(file); + mutex_lock(&fmdev->mutex); + ret = fmc_is_rds_data_available(fmdev, file, pts); + mutex_unlock(&fmdev->mutex); + if (ret < 0) + return EPOLLIN | EPOLLRDNORM; + + return 0; +} + +/* + * Handle open request for "/dev/radioX" device. + * Start with FM RX mode as default. + */ +static int fm_v4l2_fops_open(struct file *file) +{ + int ret; + struct fmdev *fmdev = NULL; + + /* Don't allow multiple open */ + if (radio_disconnected) { + fmerr("FM device is already opened\n"); + return -EBUSY; + } + + fmdev = video_drvdata(file); + + if (mutex_lock_interruptible(&fmdev->mutex)) + return -ERESTARTSYS; + ret = fmc_prepare(fmdev); + if (ret < 0) { + fmerr("Unable to prepare FM CORE\n"); + goto open_unlock; + } + + fmdbg("Load FM RX firmware..\n"); + + ret = fmc_set_mode(fmdev, FM_MODE_RX); + if (ret < 0) { + fmerr("Unable to load FM RX firmware\n"); + goto open_unlock; + } + radio_disconnected = 1; + +open_unlock: + mutex_unlock(&fmdev->mutex); + return ret; +} + +static int fm_v4l2_fops_release(struct file *file) +{ + int ret; + struct fmdev *fmdev; + + fmdev = video_drvdata(file); + if (!radio_disconnected) { + fmdbg("FM device is already closed\n"); + return 0; + } + + mutex_lock(&fmdev->mutex); + ret = fmc_set_mode(fmdev, FM_MODE_OFF); + if (ret < 0) { + fmerr("Unable to turn off the chip\n"); + goto release_unlock; + } + + ret = fmc_release(fmdev); + if (ret < 0) { + fmerr("FM CORE release failed\n"); + goto release_unlock; + } + radio_disconnected = 0; + +release_unlock: + mutex_unlock(&fmdev->mutex); + return ret; +} + +/* V4L2 RADIO (/dev/radioX) device IOCTL interfaces */ +static int fm_v4l2_vidioc_querycap(struct file *file, void *priv, + struct v4l2_capability *capability) +{ + strscpy(capability->driver, FM_DRV_NAME, sizeof(capability->driver)); + strscpy(capability->card, FM_DRV_CARD_SHORT_NAME, + sizeof(capability->card)); + sprintf(capability->bus_info, "UART"); + return 0; +} + +static int fm_g_volatile_ctrl(struct v4l2_ctrl *ctrl) +{ + struct fmdev *fmdev = container_of(ctrl->handler, + struct fmdev, ctrl_handler); + + switch (ctrl->id) { + case V4L2_CID_TUNE_ANTENNA_CAPACITOR: + ctrl->val = fm_tx_get_tune_cap_val(fmdev); + break; + default: + fmwarn("%s: Unknown IOCTL: %d\n", __func__, ctrl->id); + break; + } + + return 0; +} + +static int fm_v4l2_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct fmdev *fmdev = container_of(ctrl->handler, + struct fmdev, ctrl_handler); + + switch (ctrl->id) { + case V4L2_CID_AUDIO_VOLUME: /* set volume */ + return fm_rx_set_volume(fmdev, (u16)ctrl->val); + + case V4L2_CID_AUDIO_MUTE: /* set mute */ + return fmc_set_mute_mode(fmdev, (u8)ctrl->val); + + case V4L2_CID_TUNE_POWER_LEVEL: + /* set TX power level - ext control */ + return fm_tx_set_pwr_lvl(fmdev, (u8)ctrl->val); + + case V4L2_CID_TUNE_PREEMPHASIS: + return fm_tx_set_preemph_filter(fmdev, (u8) ctrl->val); + + default: + return -EINVAL; + } +} + +static int fm_v4l2_vidioc_g_audio(struct file *file, void *priv, + struct v4l2_audio *audio) +{ + memset(audio, 0, sizeof(*audio)); + strscpy(audio->name, "Radio", sizeof(audio->name)); + audio->capability = V4L2_AUDCAP_STEREO; + + return 0; +} + +static int fm_v4l2_vidioc_s_audio(struct file *file, void *priv, + const struct v4l2_audio *audio) +{ + if (audio->index != 0) + return -EINVAL; + + return 0; +} + +/* Get tuner attributes. If current mode is NOT RX, return error */ +static int fm_v4l2_vidioc_g_tuner(struct file *file, void *priv, + struct v4l2_tuner *tuner) +{ + struct fmdev *fmdev = video_drvdata(file); + u32 bottom_freq; + u32 top_freq; + u16 stereo_mono_mode; + u16 rssilvl; + int ret; + + if (tuner->index != 0) + return -EINVAL; + + if (fmdev->curr_fmmode != FM_MODE_RX) + return -EPERM; + + ret = fm_rx_get_band_freq_range(fmdev, &bottom_freq, &top_freq); + if (ret != 0) + return ret; + + ret = fm_rx_get_stereo_mono(fmdev, &stereo_mono_mode); + if (ret != 0) + return ret; + + ret = fm_rx_get_rssi_level(fmdev, &rssilvl); + if (ret != 0) + return ret; + + strscpy(tuner->name, "FM", sizeof(tuner->name)); + tuner->type = V4L2_TUNER_RADIO; + /* Store rangelow and rangehigh freq in unit of 62.5 Hz */ + tuner->rangelow = bottom_freq * 16; + tuner->rangehigh = top_freq * 16; + tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO | + ((fmdev->rx.rds.flag == FM_RDS_ENABLE) ? V4L2_TUNER_SUB_RDS : 0); + tuner->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS | + V4L2_TUNER_CAP_LOW | + V4L2_TUNER_CAP_HWSEEK_BOUNDED | + V4L2_TUNER_CAP_HWSEEK_WRAP; + tuner->audmode = (stereo_mono_mode ? + V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO); + + /* + * Actual rssi value lies in between -128 to +127. + * Convert this range from 0 to 255 by adding +128 + */ + rssilvl += 128; + + /* + * Return signal strength value should be within 0 to 65535. + * Find out correct signal radio by multiplying (65535/255) = 257 + */ + tuner->signal = rssilvl * 257; + tuner->afc = 0; + + return ret; +} + +/* + * Set tuner attributes. If current mode is NOT RX, set to RX. + * Currently, we set only audio mode (mono/stereo) and RDS state (on/off). + * Should we set other tuner attributes, too? + */ +static int fm_v4l2_vidioc_s_tuner(struct file *file, void *priv, + const struct v4l2_tuner *tuner) +{ + struct fmdev *fmdev = video_drvdata(file); + u16 aud_mode; + u8 rds_mode; + int ret; + + if (tuner->index != 0) + return -EINVAL; + + aud_mode = (tuner->audmode == V4L2_TUNER_MODE_STEREO) ? + FM_STEREO_MODE : FM_MONO_MODE; + rds_mode = (tuner->rxsubchans & V4L2_TUNER_SUB_RDS) ? + FM_RDS_ENABLE : FM_RDS_DISABLE; + + if (fmdev->curr_fmmode != FM_MODE_RX) { + ret = fmc_set_mode(fmdev, FM_MODE_RX); + if (ret < 0) { + fmerr("Failed to set RX mode\n"); + return ret; + } + } + + ret = fmc_set_stereo_mono(fmdev, aud_mode); + if (ret < 0) { + fmerr("Failed to set RX stereo/mono mode\n"); + return ret; + } + + ret = fmc_set_rds_mode(fmdev, rds_mode); + if (ret < 0) + fmerr("Failed to set RX RDS mode\n"); + + return ret; +} + +/* Get tuner or modulator radio frequency */ +static int fm_v4l2_vidioc_g_freq(struct file *file, void *priv, + struct v4l2_frequency *freq) +{ + struct fmdev *fmdev = video_drvdata(file); + int ret; + + ret = fmc_get_freq(fmdev, &freq->frequency); + if (ret < 0) { + fmerr("Failed to get frequency\n"); + return ret; + } + + /* Frequency unit of 62.5 Hz*/ + freq->frequency = (u32) freq->frequency * 16; + + return 0; +} + +/* Set tuner or modulator radio frequency */ +static int fm_v4l2_vidioc_s_freq(struct file *file, void *priv, + const struct v4l2_frequency *freq) +{ + struct fmdev *fmdev = video_drvdata(file); + + /* + * As V4L2_TUNER_CAP_LOW is set 1 user sends the frequency + * in units of 62.5 Hz. + */ + return fmc_set_freq(fmdev, freq->frequency / 16); +} + +/* Set hardware frequency seek. If current mode is NOT RX, set it RX. */ +static int fm_v4l2_vidioc_s_hw_freq_seek(struct file *file, void *priv, + const struct v4l2_hw_freq_seek *seek) +{ + struct fmdev *fmdev = video_drvdata(file); + int ret; + + if (file->f_flags & O_NONBLOCK) + return -EWOULDBLOCK; + + if (fmdev->curr_fmmode != FM_MODE_RX) { + ret = fmc_set_mode(fmdev, FM_MODE_RX); + if (ret != 0) { + fmerr("Failed to set RX mode\n"); + return ret; + } + } + + ret = fm_rx_seek(fmdev, seek->seek_upward, seek->wrap_around, + seek->spacing); + if (ret < 0) + fmerr("RX seek failed - %d\n", ret); + + return ret; +} +/* Get modulator attributes. If mode is not TX, return no attributes. */ +static int fm_v4l2_vidioc_g_modulator(struct file *file, void *priv, + struct v4l2_modulator *mod) +{ + struct fmdev *fmdev = video_drvdata(file); + + if (mod->index != 0) + return -EINVAL; + + if (fmdev->curr_fmmode != FM_MODE_TX) + return -EPERM; + + mod->txsubchans = ((fmdev->tx_data.aud_mode == FM_STEREO_MODE) ? + V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO) | + ((fmdev->tx_data.rds.flag == FM_RDS_ENABLE) ? + V4L2_TUNER_SUB_RDS : 0); + + mod->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS | + V4L2_TUNER_CAP_LOW; + + return 0; +} + +/* Set modulator attributes. If mode is not TX, set to TX. */ +static int fm_v4l2_vidioc_s_modulator(struct file *file, void *priv, + const struct v4l2_modulator *mod) +{ + struct fmdev *fmdev = video_drvdata(file); + u8 rds_mode; + u16 aud_mode; + int ret; + + if (mod->index != 0) + return -EINVAL; + + if (fmdev->curr_fmmode != FM_MODE_TX) { + ret = fmc_set_mode(fmdev, FM_MODE_TX); + if (ret != 0) { + fmerr("Failed to set TX mode\n"); + return ret; + } + } + + aud_mode = (mod->txsubchans & V4L2_TUNER_SUB_STEREO) ? + FM_STEREO_MODE : FM_MONO_MODE; + rds_mode = (mod->txsubchans & V4L2_TUNER_SUB_RDS) ? + FM_RDS_ENABLE : FM_RDS_DISABLE; + ret = fm_tx_set_stereo_mono(fmdev, aud_mode); + if (ret < 0) { + fmerr("Failed to set mono/stereo mode for TX\n"); + return ret; + } + ret = fm_tx_set_rds_mode(fmdev, rds_mode); + if (ret < 0) + fmerr("Failed to set rds mode for TX\n"); + + return ret; +} + +static const struct v4l2_file_operations fm_drv_fops = { + .owner = THIS_MODULE, + .read = fm_v4l2_fops_read, + .write = fm_v4l2_fops_write, + .poll = fm_v4l2_fops_poll, + .unlocked_ioctl = video_ioctl2, + .open = fm_v4l2_fops_open, + .release = fm_v4l2_fops_release, +}; + +static const struct v4l2_ctrl_ops fm_ctrl_ops = { + .s_ctrl = fm_v4l2_s_ctrl, + .g_volatile_ctrl = fm_g_volatile_ctrl, +}; +static const struct v4l2_ioctl_ops fm_drv_ioctl_ops = { + .vidioc_querycap = fm_v4l2_vidioc_querycap, + .vidioc_g_audio = fm_v4l2_vidioc_g_audio, + .vidioc_s_audio = fm_v4l2_vidioc_s_audio, + .vidioc_g_tuner = fm_v4l2_vidioc_g_tuner, + .vidioc_s_tuner = fm_v4l2_vidioc_s_tuner, + .vidioc_g_frequency = fm_v4l2_vidioc_g_freq, + .vidioc_s_frequency = fm_v4l2_vidioc_s_freq, + .vidioc_s_hw_freq_seek = fm_v4l2_vidioc_s_hw_freq_seek, + .vidioc_g_modulator = fm_v4l2_vidioc_g_modulator, + .vidioc_s_modulator = fm_v4l2_vidioc_s_modulator +}; + +/* V4L2 RADIO device parent structure */ +static const struct video_device fm_viddev_template = { + .fops = &fm_drv_fops, + .ioctl_ops = &fm_drv_ioctl_ops, + .name = FM_DRV_NAME, + .release = video_device_release_empty, + /* + * To ensure both the tuner and modulator ioctls are accessible we + * set the vfl_dir to M2M to indicate this. + * + * It is not really a mem2mem device of course, but it can both receive + * and transmit using the same radio device. It's the only radio driver + * that does this and it should really be split in two radio devices, + * but that would affect applications using this driver. + */ + .vfl_dir = VFL_DIR_M2M, + .device_caps = V4L2_CAP_HW_FREQ_SEEK | V4L2_CAP_TUNER | V4L2_CAP_RADIO | + V4L2_CAP_MODULATOR | V4L2_CAP_AUDIO | + V4L2_CAP_READWRITE | V4L2_CAP_RDS_CAPTURE, +}; + +int fm_v4l2_init_video_device(struct fmdev *fmdev, int radio_nr) +{ + struct v4l2_ctrl *ctrl; + int ret; + + strscpy(fmdev->v4l2_dev.name, FM_DRV_NAME, + sizeof(fmdev->v4l2_dev.name)); + ret = v4l2_device_register(NULL, &fmdev->v4l2_dev); + if (ret < 0) + return ret; + + /* Init mutex for core locking */ + mutex_init(&fmdev->mutex); + + /* Setup FM driver's V4L2 properties */ + gradio_dev = fm_viddev_template; + + video_set_drvdata(&gradio_dev, fmdev); + + gradio_dev.lock = &fmdev->mutex; + gradio_dev.v4l2_dev = &fmdev->v4l2_dev; + + /* Register with V4L2 subsystem as RADIO device */ + if (video_register_device(&gradio_dev, VFL_TYPE_RADIO, radio_nr)) { + v4l2_device_unregister(&fmdev->v4l2_dev); + fmerr("Could not register video device\n"); + return -ENOMEM; + } + + fmdev->radio_dev = &gradio_dev; + + /* Register to v4l2 ctrl handler framework */ + fmdev->radio_dev->ctrl_handler = &fmdev->ctrl_handler; + + ret = v4l2_ctrl_handler_init(&fmdev->ctrl_handler, 5); + if (ret < 0) { + fmerr("(fmdev): Can't init ctrl handler\n"); + v4l2_ctrl_handler_free(&fmdev->ctrl_handler); + video_unregister_device(fmdev->radio_dev); + v4l2_device_unregister(&fmdev->v4l2_dev); + return -EBUSY; + } + + /* + * Following controls are handled by V4L2 control framework. + * Added in ascending ID order. + */ + v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops, + V4L2_CID_AUDIO_VOLUME, FM_RX_VOLUME_MIN, + FM_RX_VOLUME_MAX, 1, FM_RX_VOLUME_MAX); + + v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops, + V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); + + v4l2_ctrl_new_std_menu(&fmdev->ctrl_handler, &fm_ctrl_ops, + V4L2_CID_TUNE_PREEMPHASIS, V4L2_PREEMPHASIS_75_uS, + 0, V4L2_PREEMPHASIS_75_uS); + + v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops, + V4L2_CID_TUNE_POWER_LEVEL, FM_PWR_LVL_LOW, + FM_PWR_LVL_HIGH, 1, FM_PWR_LVL_HIGH); + + ctrl = v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops, + V4L2_CID_TUNE_ANTENNA_CAPACITOR, 0, + 255, 1, 255); + + if (ctrl) + ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE; + + return 0; +} + +void *fm_v4l2_deinit_video_device(void) +{ + struct fmdev *fmdev; + + + fmdev = video_get_drvdata(&gradio_dev); + + /* Unregister to v4l2 ctrl handler framework*/ + v4l2_ctrl_handler_free(&fmdev->ctrl_handler); + + /* Unregister RADIO device from V4L2 subsystem */ + video_unregister_device(&gradio_dev); + + v4l2_device_unregister(&fmdev->v4l2_dev); + + return fmdev; +} -- cgit v1.2.3