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/usb/au0828/au0828-i2c.c | 393 ++++++++++++++++++++++++++++++++++ 1 file changed, 393 insertions(+) create mode 100644 drivers/media/usb/au0828/au0828-i2c.c (limited to 'drivers/media/usb/au0828/au0828-i2c.c') diff --git a/drivers/media/usb/au0828/au0828-i2c.c b/drivers/media/usb/au0828/au0828-i2c.c new file mode 100644 index 000000000..749f90d73 --- /dev/null +++ b/drivers/media/usb/au0828/au0828-i2c.c @@ -0,0 +1,393 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Driver for the Auvitek AU0828 USB bridge + * + * Copyright (c) 2008 Steven Toth + */ + +#include "au0828.h" + +#include +#include +#include +#include +#include + +#include "media/tuner.h" +#include + +static int i2c_scan; +module_param(i2c_scan, int, 0444); +MODULE_PARM_DESC(i2c_scan, "scan i2c bus at insmod time"); + +#define I2C_WAIT_DELAY 25 +#define I2C_WAIT_RETRY 1000 + +static inline int i2c_slave_did_read_ack(struct i2c_adapter *i2c_adap) +{ + struct au0828_dev *dev = i2c_adap->algo_data; + return au0828_read(dev, AU0828_I2C_STATUS_201) & + AU0828_I2C_STATUS_NO_READ_ACK ? 0 : 1; +} + +static int i2c_wait_read_ack(struct i2c_adapter *i2c_adap) +{ + int count; + + for (count = 0; count < I2C_WAIT_RETRY; count++) { + if (!i2c_slave_did_read_ack(i2c_adap)) + break; + udelay(I2C_WAIT_DELAY); + } + + if (I2C_WAIT_RETRY == count) + return 0; + + return 1; +} + +static inline int i2c_is_read_busy(struct i2c_adapter *i2c_adap) +{ + struct au0828_dev *dev = i2c_adap->algo_data; + return au0828_read(dev, AU0828_I2C_STATUS_201) & + AU0828_I2C_STATUS_READ_DONE ? 0 : 1; +} + +static int i2c_wait_read_done(struct i2c_adapter *i2c_adap) +{ + int count; + + for (count = 0; count < I2C_WAIT_RETRY; count++) { + if (!i2c_is_read_busy(i2c_adap)) + break; + udelay(I2C_WAIT_DELAY); + } + + if (I2C_WAIT_RETRY == count) + return 0; + + return 1; +} + +static inline int i2c_is_write_done(struct i2c_adapter *i2c_adap) +{ + struct au0828_dev *dev = i2c_adap->algo_data; + return au0828_read(dev, AU0828_I2C_STATUS_201) & + AU0828_I2C_STATUS_WRITE_DONE ? 1 : 0; +} + +static int i2c_wait_write_done(struct i2c_adapter *i2c_adap) +{ + int count; + + for (count = 0; count < I2C_WAIT_RETRY; count++) { + if (i2c_is_write_done(i2c_adap)) + break; + udelay(I2C_WAIT_DELAY); + } + + if (I2C_WAIT_RETRY == count) + return 0; + + return 1; +} + +static inline int i2c_is_busy(struct i2c_adapter *i2c_adap) +{ + struct au0828_dev *dev = i2c_adap->algo_data; + return au0828_read(dev, AU0828_I2C_STATUS_201) & + AU0828_I2C_STATUS_BUSY ? 1 : 0; +} + +static int i2c_wait_done(struct i2c_adapter *i2c_adap) +{ + int count; + + for (count = 0; count < I2C_WAIT_RETRY; count++) { + if (!i2c_is_busy(i2c_adap)) + break; + udelay(I2C_WAIT_DELAY); + } + + if (I2C_WAIT_RETRY == count) + return 0; + + return 1; +} + +/* FIXME: Implement join handling correctly */ +static int i2c_sendbytes(struct i2c_adapter *i2c_adap, + const struct i2c_msg *msg, int joined_rlen) +{ + int i, strobe = 0; + struct au0828_dev *dev = i2c_adap->algo_data; + u8 i2c_speed = dev->board.i2c_clk_divider; + + dprintk(4, "%s()\n", __func__); + + au0828_write(dev, AU0828_I2C_MULTIBYTE_MODE_2FF, 0x01); + + if (((dev->board.tuner_type == TUNER_XC5000) || + (dev->board.tuner_type == TUNER_XC5000C)) && + (dev->board.tuner_addr == msg->addr)) { + /* + * Due to I2C clock stretch, we need to use a lower speed + * on xc5000 for commands. However, firmware transfer can + * speed up to 400 KHz. + */ + if (msg->len == 64) + i2c_speed = AU0828_I2C_CLK_250KHZ; + else + i2c_speed = AU0828_I2C_CLK_20KHZ; + } + /* Set the I2C clock */ + au0828_write(dev, AU0828_I2C_CLK_DIVIDER_202, i2c_speed); + + /* Hardware needs 8 bit addresses */ + au0828_write(dev, AU0828_I2C_DEST_ADDR_203, msg->addr << 1); + + dprintk(4, "SEND: %02x\n", msg->addr); + + /* Deal with i2c_scan */ + if (msg->len == 0) { + /* The analog tuner detection code makes use of the SMBUS_QUICK + message (which involves a zero length i2c write). To avoid + checking the status register when we didn't strobe out any + actual bytes to the bus, just do a read check. This is + consistent with how I saw i2c device checking done in the + USB trace of the Windows driver */ + au0828_write(dev, AU0828_I2C_TRIGGER_200, + AU0828_I2C_TRIGGER_READ); + + if (!i2c_wait_done(i2c_adap)) + return -EIO; + + if (i2c_wait_read_ack(i2c_adap)) + return -EIO; + + return 0; + } + + for (i = 0; i < msg->len;) { + + dprintk(4, " %02x\n", msg->buf[i]); + + au0828_write(dev, AU0828_I2C_WRITE_FIFO_205, msg->buf[i]); + + strobe++; + i++; + + if ((strobe >= 4) || (i >= msg->len)) { + + /* Strobe the byte into the bus */ + if (i < msg->len) + au0828_write(dev, AU0828_I2C_TRIGGER_200, + AU0828_I2C_TRIGGER_WRITE | + AU0828_I2C_TRIGGER_HOLD); + else + au0828_write(dev, AU0828_I2C_TRIGGER_200, + AU0828_I2C_TRIGGER_WRITE); + + /* Reset strobe trigger */ + strobe = 0; + + if (!i2c_wait_write_done(i2c_adap)) + return -EIO; + + } + + } + if (!i2c_wait_done(i2c_adap)) + return -EIO; + + dprintk(4, "\n"); + + return msg->len; +} + +/* FIXME: Implement join handling correctly */ +static int i2c_readbytes(struct i2c_adapter *i2c_adap, + const struct i2c_msg *msg, int joined) +{ + struct au0828_dev *dev = i2c_adap->algo_data; + u8 i2c_speed = dev->board.i2c_clk_divider; + int i; + + dprintk(4, "%s()\n", __func__); + + au0828_write(dev, AU0828_I2C_MULTIBYTE_MODE_2FF, 0x01); + + /* + * Due to xc5000c clock stretch, we cannot use full speed at + * readings from xc5000, as otherwise they'll fail. + */ + if (((dev->board.tuner_type == TUNER_XC5000) || + (dev->board.tuner_type == TUNER_XC5000C)) && + (dev->board.tuner_addr == msg->addr)) + i2c_speed = AU0828_I2C_CLK_20KHZ; + + /* Set the I2C clock */ + au0828_write(dev, AU0828_I2C_CLK_DIVIDER_202, i2c_speed); + + /* Hardware needs 8 bit addresses */ + au0828_write(dev, AU0828_I2C_DEST_ADDR_203, msg->addr << 1); + + dprintk(4, " RECV:\n"); + + /* Deal with i2c_scan */ + if (msg->len == 0) { + au0828_write(dev, AU0828_I2C_TRIGGER_200, + AU0828_I2C_TRIGGER_READ); + + if (i2c_wait_read_ack(i2c_adap)) + return -EIO; + return 0; + } + + for (i = 0; i < msg->len;) { + + i++; + + if (i < msg->len) + au0828_write(dev, AU0828_I2C_TRIGGER_200, + AU0828_I2C_TRIGGER_READ | + AU0828_I2C_TRIGGER_HOLD); + else + au0828_write(dev, AU0828_I2C_TRIGGER_200, + AU0828_I2C_TRIGGER_READ); + + if (!i2c_wait_read_done(i2c_adap)) + return -EIO; + + msg->buf[i-1] = au0828_read(dev, AU0828_I2C_READ_FIFO_209) & + 0xff; + + dprintk(4, " %02x\n", msg->buf[i-1]); + } + if (!i2c_wait_done(i2c_adap)) + return -EIO; + + dprintk(4, "\n"); + + return msg->len; +} + +static int i2c_xfer(struct i2c_adapter *i2c_adap, + struct i2c_msg *msgs, int num) +{ + int i, retval = 0; + + dprintk(4, "%s(num = %d)\n", __func__, num); + + for (i = 0; i < num; i++) { + dprintk(4, "%s(num = %d) addr = 0x%02x len = 0x%x\n", + __func__, num, msgs[i].addr, msgs[i].len); + if (msgs[i].flags & I2C_M_RD) { + /* read */ + retval = i2c_readbytes(i2c_adap, &msgs[i], 0); + } else if (i + 1 < num && (msgs[i + 1].flags & I2C_M_RD) && + msgs[i].addr == msgs[i + 1].addr) { + /* write then read from same address */ + retval = i2c_sendbytes(i2c_adap, &msgs[i], + msgs[i + 1].len); + if (retval < 0) + goto err; + i++; + retval = i2c_readbytes(i2c_adap, &msgs[i], 1); + } else { + /* write */ + retval = i2c_sendbytes(i2c_adap, &msgs[i], 0); + } + if (retval < 0) + goto err; + } + return num; + +err: + return retval; +} + +static u32 au0828_functionality(struct i2c_adapter *adap) +{ + return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C; +} + +static const struct i2c_algorithm au0828_i2c_algo_template = { + .master_xfer = i2c_xfer, + .functionality = au0828_functionality, +}; + +/* ----------------------------------------------------------------------- */ + +static const struct i2c_adapter au0828_i2c_adap_template = { + .name = KBUILD_MODNAME, + .owner = THIS_MODULE, + .algo = &au0828_i2c_algo_template, +}; + +static const struct i2c_client au0828_i2c_client_template = { + .name = "au0828 internal", +}; + +static char *i2c_devs[128] = { + [0x8e >> 1] = "au8522", + [0xa0 >> 1] = "eeprom", + [0xc2 >> 1] = "tuner/xc5000", +}; + +static void do_i2c_scan(char *name, struct i2c_client *c) +{ + unsigned char buf; + int i, rc; + + for (i = 0; i < 128; i++) { + c->addr = i; + rc = i2c_master_recv(c, &buf, 0); + if (rc < 0) + continue; + pr_info("%s: i2c scan: found device @ 0x%x [%s]\n", + name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???"); + } +} + +/* init + register i2c adapter */ +int au0828_i2c_register(struct au0828_dev *dev) +{ + dprintk(1, "%s()\n", __func__); + + dev->i2c_adap = au0828_i2c_adap_template; + dev->i2c_algo = au0828_i2c_algo_template; + dev->i2c_client = au0828_i2c_client_template; + + dev->i2c_adap.dev.parent = &dev->usbdev->dev; + + strscpy(dev->i2c_adap.name, KBUILD_MODNAME, + sizeof(dev->i2c_adap.name)); + + dev->i2c_adap.algo = &dev->i2c_algo; + dev->i2c_adap.algo_data = dev; +#ifdef CONFIG_VIDEO_AU0828_V4L2 + i2c_set_adapdata(&dev->i2c_adap, &dev->v4l2_dev); +#else + i2c_set_adapdata(&dev->i2c_adap, dev); +#endif + i2c_add_adapter(&dev->i2c_adap); + + dev->i2c_client.adapter = &dev->i2c_adap; + + if (0 == dev->i2c_rc) { + pr_info("i2c bus registered\n"); + if (i2c_scan) + do_i2c_scan(KBUILD_MODNAME, &dev->i2c_client); + } else + pr_info("i2c bus register FAILED\n"); + + return dev->i2c_rc; +} + +int au0828_i2c_unregister(struct au0828_dev *dev) +{ + i2c_del_adapter(&dev->i2c_adap); + return 0; +} + -- cgit v1.2.3