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/mt352.c | 596 ++++++++++++++++++++++++++++++++++++ 1 file changed, 596 insertions(+) create mode 100644 drivers/media/dvb-frontends/mt352.c (limited to 'drivers/media/dvb-frontends/mt352.c') diff --git a/drivers/media/dvb-frontends/mt352.c b/drivers/media/dvb-frontends/mt352.c new file mode 100644 index 000000000..399d5c519 --- /dev/null +++ b/drivers/media/dvb-frontends/mt352.c @@ -0,0 +1,596 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Driver for Zarlink DVB-T MT352 demodulator + * + * Written by Holger Waechtler + * and Daniel Mack + * + * AVerMedia AVerTV DVB-T 771 support by + * Wolfram Joost + * + * Support for Samsung TDTC9251DH01C(M) tuner + * Copyright (C) 2004 Antonio Mancuso + * Amauri Celani + * + * DVICO FusionHDTV DVB-T1 and DVICO FusionHDTV DVB-T Lite support by + * Christopher Pascoe + */ + +#include +#include +#include +#include +#include +#include + +#include +#include "mt352_priv.h" +#include "mt352.h" + +struct mt352_state { + struct i2c_adapter* i2c; + struct dvb_frontend frontend; + + /* configuration settings */ + struct mt352_config config; +}; + +static int debug; +#define dprintk(args...) \ + do { \ + if (debug) printk(KERN_DEBUG "mt352: " args); \ + } while (0) + +static int mt352_single_write(struct dvb_frontend *fe, u8 reg, u8 val) +{ + struct mt352_state* state = fe->demodulator_priv; + u8 buf[2] = { reg, val }; + struct i2c_msg msg = { .addr = state->config.demod_address, .flags = 0, + .buf = buf, .len = 2 }; + int err = i2c_transfer(state->i2c, &msg, 1); + if (err != 1) { + printk("mt352_write() to reg %x failed (err = %d)!\n", reg, err); + return err; + } + return 0; +} + +static int _mt352_write(struct dvb_frontend* fe, const u8 ibuf[], int ilen) +{ + int err,i; + for (i=0; i < ilen-1; i++) + if ((err = mt352_single_write(fe,ibuf[0]+i,ibuf[i+1]))) + return err; + + return 0; +} + +static int mt352_read_register(struct mt352_state* state, u8 reg) +{ + int ret; + u8 b0 [] = { reg }; + u8 b1 [] = { 0 }; + struct i2c_msg msg [] = { { .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, msg, 2); + + if (ret != 2) { + printk("%s: readreg error (reg=%d, ret==%i)\n", + __func__, reg, ret); + return ret; + } + + return b1[0]; +} + +static int mt352_sleep(struct dvb_frontend* fe) +{ + static u8 mt352_softdown[] = { CLOCK_CTL, 0x20, 0x08 }; + + _mt352_write(fe, mt352_softdown, sizeof(mt352_softdown)); + return 0; +} + +static void mt352_calc_nominal_rate(struct mt352_state* state, + u32 bandwidth, + unsigned char *buf) +{ + u32 adc_clock = 20480; /* 20.340 MHz */ + u32 bw,value; + + switch (bandwidth) { + case 6000000: + bw = 6; + break; + case 7000000: + bw = 7; + break; + case 8000000: + default: + bw = 8; + break; + } + if (state->config.adc_clock) + adc_clock = state->config.adc_clock; + + value = 64 * bw * (1<<16) / (7 * 8); + value = value * 1000 / adc_clock; + dprintk("%s: bw %d, adc_clock %d => 0x%x\n", + __func__, bw, adc_clock, value); + buf[0] = msb(value); + buf[1] = lsb(value); +} + +static void mt352_calc_input_freq(struct mt352_state* state, + unsigned char *buf) +{ + int adc_clock = 20480; /* 20.480000 MHz */ + int if2 = 36167; /* 36.166667 MHz */ + int ife,value; + + if (state->config.adc_clock) + adc_clock = state->config.adc_clock; + if (state->config.if2) + if2 = state->config.if2; + + if (adc_clock >= if2 * 2) + ife = if2; + else { + ife = adc_clock - (if2 % adc_clock); + if (ife > adc_clock / 2) + ife = adc_clock - ife; + } + value = -16374 * ife / adc_clock; + dprintk("%s: if2 %d, ife %d, adc_clock %d => %d / 0x%x\n", + __func__, if2, ife, adc_clock, value, value & 0x3fff); + buf[0] = msb(value); + buf[1] = lsb(value); +} + +static int mt352_set_parameters(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *op = &fe->dtv_property_cache; + struct mt352_state* state = fe->demodulator_priv; + unsigned char buf[13]; + static unsigned char tuner_go[] = { 0x5d, 0x01 }; + static unsigned char fsm_go[] = { 0x5e, 0x01 }; + unsigned int tps = 0; + + switch (op->code_rate_HP) { + case FEC_2_3: + tps |= (1 << 7); + break; + case FEC_3_4: + tps |= (2 << 7); + break; + case FEC_5_6: + tps |= (3 << 7); + break; + case FEC_7_8: + tps |= (4 << 7); + break; + case FEC_1_2: + case FEC_AUTO: + break; + default: + return -EINVAL; + } + + switch (op->code_rate_LP) { + case FEC_2_3: + tps |= (1 << 4); + break; + case FEC_3_4: + tps |= (2 << 4); + break; + case FEC_5_6: + tps |= (3 << 4); + break; + case FEC_7_8: + tps |= (4 << 4); + break; + case FEC_1_2: + case FEC_AUTO: + break; + case FEC_NONE: + if (op->hierarchy == HIERARCHY_AUTO || + op->hierarchy == HIERARCHY_NONE) + break; + fallthrough; + default: + return -EINVAL; + } + + switch (op->modulation) { + case QPSK: + break; + case QAM_AUTO: + case QAM_16: + tps |= (1 << 13); + break; + case QAM_64: + tps |= (2 << 13); + break; + default: + return -EINVAL; + } + + switch (op->transmission_mode) { + case TRANSMISSION_MODE_2K: + case TRANSMISSION_MODE_AUTO: + break; + case TRANSMISSION_MODE_8K: + tps |= (1 << 0); + break; + default: + return -EINVAL; + } + + switch (op->guard_interval) { + case GUARD_INTERVAL_1_32: + case GUARD_INTERVAL_AUTO: + break; + case GUARD_INTERVAL_1_16: + tps |= (1 << 2); + break; + case GUARD_INTERVAL_1_8: + tps |= (2 << 2); + break; + case GUARD_INTERVAL_1_4: + tps |= (3 << 2); + break; + default: + return -EINVAL; + } + + switch (op->hierarchy) { + case HIERARCHY_AUTO: + case HIERARCHY_NONE: + break; + case HIERARCHY_1: + tps |= (1 << 10); + break; + case HIERARCHY_2: + tps |= (2 << 10); + break; + case HIERARCHY_4: + tps |= (3 << 10); + break; + default: + return -EINVAL; + } + + + buf[0] = TPS_GIVEN_1; /* TPS_GIVEN_1 and following registers */ + + buf[1] = msb(tps); /* TPS_GIVEN_(1|0) */ + buf[2] = lsb(tps); + + buf[3] = 0x50; // old +// buf[3] = 0xf4; // pinnacle + + mt352_calc_nominal_rate(state, op->bandwidth_hz, buf+4); + mt352_calc_input_freq(state, buf+6); + + if (state->config.no_tuner) { + 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); + } + + _mt352_write(fe, buf, 8); + _mt352_write(fe, fsm_go, 2); + } else { + if (fe->ops.tuner_ops.calc_regs) { + fe->ops.tuner_ops.calc_regs(fe, buf+8, 5); + buf[8] <<= 1; + _mt352_write(fe, buf, sizeof(buf)); + _mt352_write(fe, tuner_go, 2); + } + } + + return 0; +} + +static int mt352_get_parameters(struct dvb_frontend* fe, + struct dtv_frontend_properties *op) +{ + struct mt352_state* state = fe->demodulator_priv; + u16 tps; + u16 div; + u8 trl; + static const u8 tps_fec_to_api[8] = + { + FEC_1_2, + FEC_2_3, + FEC_3_4, + FEC_5_6, + FEC_7_8, + FEC_AUTO, + FEC_AUTO, + FEC_AUTO + }; + + if ( (mt352_read_register(state,0x00) & 0xC0) != 0xC0 ) + return -EINVAL; + + /* Use TPS_RECEIVED-registers, not the TPS_CURRENT-registers because + * the mt352 sometimes works with the wrong parameters + */ + tps = (mt352_read_register(state, TPS_RECEIVED_1) << 8) | mt352_read_register(state, TPS_RECEIVED_0); + div = (mt352_read_register(state, CHAN_START_1) << 8) | mt352_read_register(state, CHAN_START_0); + trl = mt352_read_register(state, TRL_NOMINAL_RATE_1); + + op->code_rate_HP = tps_fec_to_api[(tps >> 7) & 7]; + op->code_rate_LP = tps_fec_to_api[(tps >> 4) & 7]; + + switch ( (tps >> 13) & 3) + { + case 0: + op->modulation = QPSK; + break; + case 1: + op->modulation = QAM_16; + break; + case 2: + op->modulation = QAM_64; + break; + default: + op->modulation = QAM_AUTO; + break; + } + + op->transmission_mode = (tps & 0x01) ? TRANSMISSION_MODE_8K : TRANSMISSION_MODE_2K; + + switch ( (tps >> 2) & 3) + { + case 0: + op->guard_interval = GUARD_INTERVAL_1_32; + break; + case 1: + op->guard_interval = GUARD_INTERVAL_1_16; + break; + case 2: + op->guard_interval = GUARD_INTERVAL_1_8; + break; + case 3: + op->guard_interval = GUARD_INTERVAL_1_4; + break; + default: + op->guard_interval = GUARD_INTERVAL_AUTO; + break; + } + + switch ( (tps >> 10) & 7) + { + case 0: + op->hierarchy = HIERARCHY_NONE; + break; + case 1: + op->hierarchy = HIERARCHY_1; + break; + case 2: + op->hierarchy = HIERARCHY_2; + break; + case 3: + op->hierarchy = HIERARCHY_4; + break; + default: + op->hierarchy = HIERARCHY_AUTO; + break; + } + + op->frequency = (500 * (div - IF_FREQUENCYx6)) / 3 * 1000; + + if (trl == 0x72) + op->bandwidth_hz = 8000000; + else if (trl == 0x64) + op->bandwidth_hz = 7000000; + else + op->bandwidth_hz = 6000000; + + + if (mt352_read_register(state, STATUS_2) & 0x02) + op->inversion = INVERSION_OFF; + else + op->inversion = INVERSION_ON; + + return 0; +} + +static int mt352_read_status(struct dvb_frontend *fe, enum fe_status *status) +{ + struct mt352_state* state = fe->demodulator_priv; + int s0, s1, s3; + + /* FIXME: + * + * The MT352 design manual from Zarlink states (page 46-47): + * + * Notes about the TUNER_GO register: + * + * If the Read_Tuner_Byte (bit-1) is activated, then the tuner status + * byte is copied from the tuner to the STATUS_3 register and + * completion of the read operation is indicated by bit-5 of the + * INTERRUPT_3 register. + */ + + if ((s0 = mt352_read_register(state, STATUS_0)) < 0) + return -EREMOTEIO; + if ((s1 = mt352_read_register(state, STATUS_1)) < 0) + return -EREMOTEIO; + if ((s3 = mt352_read_register(state, STATUS_3)) < 0) + return -EREMOTEIO; + + *status = 0; + if (s0 & (1 << 4)) + *status |= FE_HAS_CARRIER; + if (s0 & (1 << 1)) + *status |= FE_HAS_VITERBI; + if (s0 & (1 << 5)) + *status |= FE_HAS_LOCK; + if (s1 & (1 << 1)) + *status |= FE_HAS_SYNC; + if (s3 & (1 << 6)) + *status |= FE_HAS_SIGNAL; + + if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) != + (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) + *status &= ~FE_HAS_LOCK; + + return 0; +} + +static int mt352_read_ber(struct dvb_frontend* fe, u32* ber) +{ + struct mt352_state* state = fe->demodulator_priv; + + *ber = (mt352_read_register (state, RS_ERR_CNT_2) << 16) | + (mt352_read_register (state, RS_ERR_CNT_1) << 8) | + (mt352_read_register (state, RS_ERR_CNT_0)); + + return 0; +} + +static int mt352_read_signal_strength(struct dvb_frontend* fe, u16* strength) +{ + struct mt352_state* state = fe->demodulator_priv; + + /* align the 12 bit AGC gain with the most significant bits */ + u16 signal = ((mt352_read_register(state, AGC_GAIN_1) & 0x0f) << 12) | + (mt352_read_register(state, AGC_GAIN_0) << 4); + + /* inverse of gain is signal strength */ + *strength = ~signal; + return 0; +} + +static int mt352_read_snr(struct dvb_frontend* fe, u16* snr) +{ + struct mt352_state* state = fe->demodulator_priv; + + u8 _snr = mt352_read_register (state, SNR); + *snr = (_snr << 8) | _snr; + + return 0; +} + +static int mt352_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) +{ + struct mt352_state* state = fe->demodulator_priv; + + *ucblocks = (mt352_read_register (state, RS_UBC_1) << 8) | + (mt352_read_register (state, RS_UBC_0)); + + return 0; +} + +static int mt352_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fe_tune_settings) +{ + fe_tune_settings->min_delay_ms = 800; + fe_tune_settings->step_size = 0; + fe_tune_settings->max_drift = 0; + + return 0; +} + +static int mt352_init(struct dvb_frontend* fe) +{ + struct mt352_state* state = fe->demodulator_priv; + + static u8 mt352_reset_attach [] = { RESET, 0xC0 }; + + dprintk("%s: hello\n",__func__); + + if ((mt352_read_register(state, CLOCK_CTL) & 0x10) == 0 || + (mt352_read_register(state, CONFIG) & 0x20) == 0) { + + /* Do a "hard" reset */ + _mt352_write(fe, mt352_reset_attach, sizeof(mt352_reset_attach)); + return state->config.demod_init(fe); + } + + return 0; +} + +static void mt352_release(struct dvb_frontend* fe) +{ + struct mt352_state* state = fe->demodulator_priv; + kfree(state); +} + +static const struct dvb_frontend_ops mt352_ops; + +struct dvb_frontend* mt352_attach(const struct mt352_config* config, + struct i2c_adapter* i2c) +{ + struct mt352_state* state = NULL; + + /* allocate memory for the internal state */ + state = kzalloc(sizeof(struct mt352_state), GFP_KERNEL); + if (state == NULL) goto error; + + /* setup the state */ + state->i2c = i2c; + memcpy(&state->config,config,sizeof(struct mt352_config)); + + /* check if the demod is there */ + if (mt352_read_register(state, CHIP_ID) != ID_MT352) goto error; + + /* create dvb_frontend */ + memcpy(&state->frontend.ops, &mt352_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 mt352_ops = { + .delsys = { SYS_DVBT }, + .info = { + .name = "Zarlink MT352 DVB-T", + .frequency_min_hz = 174 * MHz, + .frequency_max_hz = 862 * MHz, + .frequency_stepsize_hz = 166667, + .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | + FE_CAN_FEC_3_4 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | + FE_CAN_FEC_AUTO | + FE_CAN_QPSK | 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 | FE_CAN_RECOVER | + FE_CAN_MUTE_TS + }, + + .release = mt352_release, + + .init = mt352_init, + .sleep = mt352_sleep, + .write = _mt352_write, + + .set_frontend = mt352_set_parameters, + .get_frontend = mt352_get_parameters, + .get_tune_settings = mt352_get_tune_settings, + + .read_status = mt352_read_status, + .read_ber = mt352_read_ber, + .read_signal_strength = mt352_read_signal_strength, + .read_snr = mt352_read_snr, + .read_ucblocks = mt352_read_ucblocks, +}; + +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); + +MODULE_DESCRIPTION("Zarlink MT352 DVB-T Demodulator driver"); +MODULE_AUTHOR("Holger Waechtler, Daniel Mack, Antonio Mancuso"); +MODULE_LICENSE("GPL"); + +EXPORT_SYMBOL(mt352_attach); -- cgit v1.2.3