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/dvb-frontends/nxt6000.c | 624 ++++++++++++++++++++++++++++++++++ 1 file changed, 624 insertions(+) create mode 100644 drivers/media/dvb-frontends/nxt6000.c (limited to 'drivers/media/dvb-frontends/nxt6000.c') diff --git a/drivers/media/dvb-frontends/nxt6000.c b/drivers/media/dvb-frontends/nxt6000.c new file mode 100644 index 000000000..136918f82 --- /dev/null +++ b/drivers/media/dvb-frontends/nxt6000.c @@ -0,0 +1,624 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + NxtWave Communications - NXT6000 demodulator driver + + Copyright (C) 2002-2003 Florian Schirmer + Copyright (C) 2003 Paul Andreassen + +*/ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include + +#include +#include "nxt6000_priv.h" +#include "nxt6000.h" + + + +struct nxt6000_state { + struct i2c_adapter* i2c; + /* configuration settings */ + const struct nxt6000_config* config; + struct dvb_frontend frontend; +}; + +static int debug; +#define dprintk(fmt, arg...) do { \ + if (debug) \ + printk(KERN_DEBUG pr_fmt("%s: " fmt), \ + __func__, ##arg); \ +} while (0) + +static int nxt6000_writereg(struct nxt6000_state* state, u8 reg, u8 data) +{ + u8 buf[] = { reg, data }; + struct i2c_msg msg = {.addr = state->config->demod_address,.flags = 0,.buf = buf,.len = 2 }; + int ret; + + if ((ret = i2c_transfer(state->i2c, &msg, 1)) != 1) + dprintk("nxt6000: nxt6000_write error (reg: 0x%02X, data: 0x%02X, ret: %d)\n", reg, data, ret); + + return (ret != 1) ? -EIO : 0; +} + +static u8 nxt6000_readreg(struct nxt6000_state* state, u8 reg) +{ + int ret; + u8 b0[] = { reg }; + u8 b1[] = { 0 }; + struct i2c_msg msgs[] = { + {.addr = state->config->demod_address,.flags = 0,.buf = b0,.len = 1}, + {.addr = state->config->demod_address,.flags = I2C_M_RD,.buf = b1,.len = 1} + }; + + ret = i2c_transfer(state->i2c, msgs, 2); + + if (ret != 2) + dprintk("nxt6000: nxt6000_read error (reg: 0x%02X, ret: %d)\n", reg, ret); + + return b1[0]; +} + +static void nxt6000_reset(struct nxt6000_state* state) +{ + u8 val; + + val = nxt6000_readreg(state, OFDM_COR_CTL); + + nxt6000_writereg(state, OFDM_COR_CTL, val & ~COREACT); + nxt6000_writereg(state, OFDM_COR_CTL, val | COREACT); +} + +static int nxt6000_set_bandwidth(struct nxt6000_state *state, u32 bandwidth) +{ + u16 nominal_rate; + int result; + + switch (bandwidth) { + case 6000000: + nominal_rate = 0x55B7; + break; + + case 7000000: + nominal_rate = 0x6400; + break; + + case 8000000: + nominal_rate = 0x7249; + break; + + default: + return -EINVAL; + } + + if ((result = nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_1, nominal_rate & 0xFF)) < 0) + return result; + + return nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_2, (nominal_rate >> 8) & 0xFF); +} + +static int nxt6000_set_guard_interval(struct nxt6000_state *state, + enum fe_guard_interval guard_interval) +{ + switch (guard_interval) { + + case GUARD_INTERVAL_1_32: + return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x00 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03)); + + case GUARD_INTERVAL_1_16: + return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x01 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03)); + + case GUARD_INTERVAL_AUTO: + case GUARD_INTERVAL_1_8: + return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x02 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03)); + + case GUARD_INTERVAL_1_4: + return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x03 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03)); + + default: + return -EINVAL; + } +} + +static int nxt6000_set_inversion(struct nxt6000_state *state, + enum fe_spectral_inversion inversion) +{ + switch (inversion) { + + case INVERSION_OFF: + return nxt6000_writereg(state, OFDM_ITB_CTL, 0x00); + + case INVERSION_ON: + return nxt6000_writereg(state, OFDM_ITB_CTL, ITBINV); + + default: + return -EINVAL; + + } +} + +static int +nxt6000_set_transmission_mode(struct nxt6000_state *state, + enum fe_transmit_mode transmission_mode) +{ + int result; + + switch (transmission_mode) { + + case TRANSMISSION_MODE_2K: + if ((result = nxt6000_writereg(state, EN_DMD_RACQ, 0x00 | (nxt6000_readreg(state, EN_DMD_RACQ) & ~0x03))) < 0) + return result; + + return nxt6000_writereg(state, OFDM_COR_MODEGUARD, (0x00 << 2) | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x04)); + + case TRANSMISSION_MODE_8K: + case TRANSMISSION_MODE_AUTO: + if ((result = nxt6000_writereg(state, EN_DMD_RACQ, 0x02 | (nxt6000_readreg(state, EN_DMD_RACQ) & ~0x03))) < 0) + return result; + + return nxt6000_writereg(state, OFDM_COR_MODEGUARD, (0x01 << 2) | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x04)); + + default: + return -EINVAL; + + } +} + +static void nxt6000_setup(struct dvb_frontend* fe) +{ + struct nxt6000_state* state = fe->demodulator_priv; + + nxt6000_writereg(state, RS_COR_SYNC_PARAM, SYNC_PARAM); + nxt6000_writereg(state, BER_CTRL, /*(1 << 2) | */ (0x01 << 1) | 0x01); + nxt6000_writereg(state, VIT_BERTIME_2, 0x00); // BER Timer = 0x000200 * 256 = 131072 bits + nxt6000_writereg(state, VIT_BERTIME_1, 0x02); // + nxt6000_writereg(state, VIT_BERTIME_0, 0x00); // + nxt6000_writereg(state, VIT_COR_INTEN, 0x98); // Enable BER interrupts + nxt6000_writereg(state, VIT_COR_CTL, 0x82); // Enable BER measurement + nxt6000_writereg(state, VIT_COR_CTL, VIT_COR_RESYNC | 0x02 ); + nxt6000_writereg(state, OFDM_COR_CTL, (0x01 << 5) | (nxt6000_readreg(state, OFDM_COR_CTL) & 0x0F)); + nxt6000_writereg(state, OFDM_COR_MODEGUARD, FORCEMODE8K | 0x02); + nxt6000_writereg(state, OFDM_AGC_CTL, AGCLAST | INITIAL_AGC_BW); + nxt6000_writereg(state, OFDM_ITB_FREQ_1, 0x06); + nxt6000_writereg(state, OFDM_ITB_FREQ_2, 0x31); + nxt6000_writereg(state, OFDM_CAS_CTL, (0x01 << 7) | (0x02 << 3) | 0x04); + nxt6000_writereg(state, CAS_FREQ, 0xBB); /* CHECKME */ + nxt6000_writereg(state, OFDM_SYR_CTL, 1 << 2); + nxt6000_writereg(state, OFDM_PPM_CTL_1, PPM256); + nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_1, 0x49); + nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_2, 0x72); + nxt6000_writereg(state, ANALOG_CONTROL_0, 1 << 5); + nxt6000_writereg(state, EN_DMD_RACQ, (1 << 7) | (3 << 4) | 2); + nxt6000_writereg(state, DIAG_CONFIG, TB_SET); + + if (state->config->clock_inversion) + nxt6000_writereg(state, SUB_DIAG_MODE_SEL, CLKINVERSION); + else + nxt6000_writereg(state, SUB_DIAG_MODE_SEL, 0); + + nxt6000_writereg(state, TS_FORMAT, 0); +} + +static void nxt6000_dump_status(struct nxt6000_state *state) +{ + u8 val; + +#if 0 + pr_info("RS_COR_STAT: 0x%02X\n", + nxt6000_readreg(fe, RS_COR_STAT)); + pr_info("VIT_SYNC_STATUS: 0x%02X\n", + nxt6000_readreg(fe, VIT_SYNC_STATUS)); + pr_info("OFDM_COR_STAT: 0x%02X\n", + nxt6000_readreg(fe, OFDM_COR_STAT)); + pr_info("OFDM_SYR_STAT: 0x%02X\n", + nxt6000_readreg(fe, OFDM_SYR_STAT)); + pr_info("OFDM_TPS_RCVD_1: 0x%02X\n", + nxt6000_readreg(fe, OFDM_TPS_RCVD_1)); + pr_info("OFDM_TPS_RCVD_2: 0x%02X\n", + nxt6000_readreg(fe, OFDM_TPS_RCVD_2)); + pr_info("OFDM_TPS_RCVD_3: 0x%02X\n", + nxt6000_readreg(fe, OFDM_TPS_RCVD_3)); + pr_info("OFDM_TPS_RCVD_4: 0x%02X\n", + nxt6000_readreg(fe, OFDM_TPS_RCVD_4)); + pr_info("OFDM_TPS_RESERVED_1: 0x%02X\n", + nxt6000_readreg(fe, OFDM_TPS_RESERVED_1)); + pr_info("OFDM_TPS_RESERVED_2: 0x%02X\n", + nxt6000_readreg(fe, OFDM_TPS_RESERVED_2)); +#endif + pr_info("NXT6000 status:"); + + val = nxt6000_readreg(state, RS_COR_STAT); + + pr_cont(" DATA DESCR LOCK: %d,", val & 0x01); + pr_cont(" DATA SYNC LOCK: %d,", (val >> 1) & 0x01); + + val = nxt6000_readreg(state, VIT_SYNC_STATUS); + + pr_cont(" VITERBI LOCK: %d,", (val >> 7) & 0x01); + + switch ((val >> 4) & 0x07) { + + case 0x00: + pr_cont(" VITERBI CODERATE: 1/2,"); + break; + + case 0x01: + pr_cont(" VITERBI CODERATE: 2/3,"); + break; + + case 0x02: + pr_cont(" VITERBI CODERATE: 3/4,"); + break; + + case 0x03: + pr_cont(" VITERBI CODERATE: 5/6,"); + break; + + case 0x04: + pr_cont(" VITERBI CODERATE: 7/8,"); + break; + + default: + pr_cont(" VITERBI CODERATE: Reserved,"); + + } + + val = nxt6000_readreg(state, OFDM_COR_STAT); + + pr_cont(" CHCTrack: %d,", (val >> 7) & 0x01); + pr_cont(" TPSLock: %d,", (val >> 6) & 0x01); + pr_cont(" SYRLock: %d,", (val >> 5) & 0x01); + pr_cont(" AGCLock: %d,", (val >> 4) & 0x01); + + switch (val & 0x0F) { + + case 0x00: + pr_cont(" CoreState: IDLE,"); + break; + + case 0x02: + pr_cont(" CoreState: WAIT_AGC,"); + break; + + case 0x03: + pr_cont(" CoreState: WAIT_SYR,"); + break; + + case 0x04: + pr_cont(" CoreState: WAIT_PPM,"); + break; + + case 0x01: + pr_cont(" CoreState: WAIT_TRL,"); + break; + + case 0x05: + pr_cont(" CoreState: WAIT_TPS,"); + break; + + case 0x06: + pr_cont(" CoreState: MONITOR_TPS,"); + break; + + default: + pr_cont(" CoreState: Reserved,"); + + } + + val = nxt6000_readreg(state, OFDM_SYR_STAT); + + pr_cont(" SYRLock: %d,", (val >> 4) & 0x01); + pr_cont(" SYRMode: %s,", (val >> 2) & 0x01 ? "8K" : "2K"); + + switch ((val >> 4) & 0x03) { + + case 0x00: + pr_cont(" SYRGuard: 1/32,"); + break; + + case 0x01: + pr_cont(" SYRGuard: 1/16,"); + break; + + case 0x02: + pr_cont(" SYRGuard: 1/8,"); + break; + + case 0x03: + pr_cont(" SYRGuard: 1/4,"); + break; + } + + val = nxt6000_readreg(state, OFDM_TPS_RCVD_3); + + switch ((val >> 4) & 0x07) { + + case 0x00: + pr_cont(" TPSLP: 1/2,"); + break; + + case 0x01: + pr_cont(" TPSLP: 2/3,"); + break; + + case 0x02: + pr_cont(" TPSLP: 3/4,"); + break; + + case 0x03: + pr_cont(" TPSLP: 5/6,"); + break; + + case 0x04: + pr_cont(" TPSLP: 7/8,"); + break; + + default: + pr_cont(" TPSLP: Reserved,"); + + } + + switch (val & 0x07) { + + case 0x00: + pr_cont(" TPSHP: 1/2,"); + break; + + case 0x01: + pr_cont(" TPSHP: 2/3,"); + break; + + case 0x02: + pr_cont(" TPSHP: 3/4,"); + break; + + case 0x03: + pr_cont(" TPSHP: 5/6,"); + break; + + case 0x04: + pr_cont(" TPSHP: 7/8,"); + break; + + default: + pr_cont(" TPSHP: Reserved,"); + + } + + val = nxt6000_readreg(state, OFDM_TPS_RCVD_4); + + pr_cont(" TPSMode: %s,", val & 0x01 ? "8K" : "2K"); + + switch ((val >> 4) & 0x03) { + + case 0x00: + pr_cont(" TPSGuard: 1/32,"); + break; + + case 0x01: + pr_cont(" TPSGuard: 1/16,"); + break; + + case 0x02: + pr_cont(" TPSGuard: 1/8,"); + break; + + case 0x03: + pr_cont(" TPSGuard: 1/4,"); + break; + + } + + /* Strange magic required to gain access to RF_AGC_STATUS */ + nxt6000_readreg(state, RF_AGC_VAL_1); + val = nxt6000_readreg(state, RF_AGC_STATUS); + val = nxt6000_readreg(state, RF_AGC_STATUS); + + pr_cont(" RF AGC LOCK: %d,", (val >> 4) & 0x01); + pr_cont("\n"); +} + +static int nxt6000_read_status(struct dvb_frontend *fe, enum fe_status *status) +{ + u8 core_status; + struct nxt6000_state* state = fe->demodulator_priv; + + *status = 0; + + core_status = nxt6000_readreg(state, OFDM_COR_STAT); + + if (core_status & AGCLOCKED) + *status |= FE_HAS_SIGNAL; + + if (nxt6000_readreg(state, OFDM_SYR_STAT) & GI14_SYR_LOCK) + *status |= FE_HAS_CARRIER; + + if (nxt6000_readreg(state, VIT_SYNC_STATUS) & VITINSYNC) + *status |= FE_HAS_VITERBI; + + if (nxt6000_readreg(state, RS_COR_STAT) & RSCORESTATUS) + *status |= FE_HAS_SYNC; + + if ((core_status & TPSLOCKED) && (*status == (FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))) + *status |= FE_HAS_LOCK; + + if (debug) + nxt6000_dump_status(state); + + return 0; +} + +static int nxt6000_init(struct dvb_frontend* fe) +{ + struct nxt6000_state* state = fe->demodulator_priv; + + nxt6000_reset(state); + nxt6000_setup(fe); + + return 0; +} + +static int nxt6000_set_frontend(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + struct nxt6000_state* state = fe->demodulator_priv; + int result; + + if (fe->ops.tuner_ops.set_params) { + fe->ops.tuner_ops.set_params(fe); + if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); + } + + result = nxt6000_set_bandwidth(state, p->bandwidth_hz); + if (result < 0) + return result; + + result = nxt6000_set_guard_interval(state, p->guard_interval); + if (result < 0) + return result; + + result = nxt6000_set_transmission_mode(state, p->transmission_mode); + if (result < 0) + return result; + + result = nxt6000_set_inversion(state, p->inversion); + if (result < 0) + return result; + + msleep(500); + return 0; +} + +static void nxt6000_release(struct dvb_frontend* fe) +{ + struct nxt6000_state* state = fe->demodulator_priv; + kfree(state); +} + +static int nxt6000_read_snr(struct dvb_frontend* fe, u16* snr) +{ + struct nxt6000_state* state = fe->demodulator_priv; + + *snr = nxt6000_readreg( state, OFDM_CHC_SNR) / 8; + + return 0; +} + +static int nxt6000_read_ber(struct dvb_frontend* fe, u32* ber) +{ + struct nxt6000_state* state = fe->demodulator_priv; + + nxt6000_writereg( state, VIT_COR_INTSTAT, 0x18 ); + + *ber = (nxt6000_readreg( state, VIT_BER_1 ) << 8 ) | + nxt6000_readreg( state, VIT_BER_0 ); + + nxt6000_writereg( state, VIT_COR_INTSTAT, 0x18); // Clear BER Done interrupts + + return 0; +} + +static int nxt6000_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength) +{ + struct nxt6000_state* state = fe->demodulator_priv; + + *signal_strength = (short) (511 - + (nxt6000_readreg(state, AGC_GAIN_1) + + ((nxt6000_readreg(state, AGC_GAIN_2) & 0x03) << 8))); + + return 0; +} + +static int nxt6000_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune) +{ + tune->min_delay_ms = 500; + return 0; +} + +static int nxt6000_i2c_gate_ctrl(struct dvb_frontend* fe, int enable) +{ + struct nxt6000_state* state = fe->demodulator_priv; + + if (enable) { + return nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x01); + } else { + return nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x00); + } +} + +static const struct dvb_frontend_ops nxt6000_ops; + +struct dvb_frontend* nxt6000_attach(const struct nxt6000_config* config, + struct i2c_adapter* i2c) +{ + struct nxt6000_state* state = NULL; + + /* allocate memory for the internal state */ + state = kzalloc(sizeof(struct nxt6000_state), GFP_KERNEL); + if (state == NULL) goto error; + + /* setup the state */ + state->config = config; + state->i2c = i2c; + + /* check if the demod is there */ + if (nxt6000_readreg(state, OFDM_MSC_REV) != NXT6000ASICDEVICE) goto error; + + /* create dvb_frontend */ + memcpy(&state->frontend.ops, &nxt6000_ops, sizeof(struct dvb_frontend_ops)); + state->frontend.demodulator_priv = state; + return &state->frontend; + +error: + kfree(state); + return NULL; +} + +static const struct dvb_frontend_ops nxt6000_ops = { + .delsys = { SYS_DVBT }, + .info = { + .name = "NxtWave NXT6000 DVB-T", + .frequency_min_hz = 0, + .frequency_max_hz = 863250 * kHz, + .frequency_stepsize_hz = 62500, + /*.frequency_tolerance = *//* FIXME: 12% of SR */ + .symbol_rate_min = 0, /* FIXME */ + .symbol_rate_max = 9360000, /* FIXME */ + .symbol_rate_tolerance = 4000, + .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | + FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 | + FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO | + FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO | + FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO | + FE_CAN_HIERARCHY_AUTO, + }, + + .release = nxt6000_release, + + .init = nxt6000_init, + .i2c_gate_ctrl = nxt6000_i2c_gate_ctrl, + + .get_tune_settings = nxt6000_fe_get_tune_settings, + + .set_frontend = nxt6000_set_frontend, + + .read_status = nxt6000_read_status, + .read_ber = nxt6000_read_ber, + .read_signal_strength = nxt6000_read_signal_strength, + .read_snr = nxt6000_read_snr, +}; + +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); + +MODULE_DESCRIPTION("NxtWave NXT6000 DVB-T demodulator driver"); +MODULE_AUTHOR("Florian Schirmer"); +MODULE_LICENSE("GPL"); + +EXPORT_SYMBOL(nxt6000_attach); -- cgit v1.2.3