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authorLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
committerLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
commit5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch)
treecc5c2d0a898769fd59549594fedb3ee6f84e59a0 /drivers/parport/parport_amiga.c
downloadlinux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz
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Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted
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(). ...
Diffstat (limited to 'drivers/parport/parport_amiga.c')
-rw-r--r--drivers/parport/parport_amiga.c245
1 files changed, 245 insertions, 0 deletions
diff --git a/drivers/parport/parport_amiga.c b/drivers/parport/parport_amiga.c
new file mode 100644
index 000000000..84d5701d6
--- /dev/null
+++ b/drivers/parport/parport_amiga.c
@@ -0,0 +1,245 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Low-level parallel port routines for the Amiga built-in port
+ *
+ * Author: Joerg Dorchain <joerg@dorchain.net>
+ *
+ * This is a complete rewrite of the code, but based heaviy upon the old
+ * lp_intern. code.
+ *
+ * The built-in Amiga parallel port provides one port at a fixed address
+ * with 8 bidirectional data lines (D0 - D7) and 3 bidirectional status
+ * lines (BUSY, POUT, SEL), 1 output control line /STROBE (raised automatically
+ * in hardware when the data register is accessed), and 1 input control line
+ * /ACK, able to cause an interrupt, but both not directly settable by
+ * software.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/parport.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+
+#include <asm/setup.h>
+#include <asm/amigahw.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/amigaints.h>
+
+#undef DEBUG
+
+static void amiga_write_data(struct parport *p, unsigned char data)
+{
+ pr_debug("write_data %c\n", data);
+ /* Triggers also /STROBE. This behavior cannot be changed */
+ ciaa.prb = data;
+ mb();
+}
+
+static unsigned char amiga_read_data(struct parport *p)
+{
+ /* Triggers also /STROBE. This behavior cannot be changed */
+ return ciaa.prb;
+}
+
+static unsigned char control_amiga_to_pc(unsigned char control)
+{
+ return PARPORT_CONTROL_SELECT |
+ PARPORT_CONTROL_AUTOFD | PARPORT_CONTROL_STROBE;
+ /* fake value: interrupt enable, select in, no reset,
+ no autolf, no strobe - seems to be closest the wiring diagram */
+}
+
+static void amiga_write_control(struct parport *p, unsigned char control)
+{
+ pr_debug("write_control %02x\n", control);
+ /* No implementation possible */
+}
+
+static unsigned char amiga_read_control( struct parport *p)
+{
+ pr_debug("read_control\n");
+ return control_amiga_to_pc(0);
+}
+
+static unsigned char amiga_frob_control( struct parport *p, unsigned char mask, unsigned char val)
+{
+ unsigned char old;
+
+ pr_debug("frob_control mask %02x, value %02x\n", mask, val);
+ old = amiga_read_control(p);
+ amiga_write_control(p, (old & ~mask) ^ val);
+ return old;
+}
+
+static unsigned char status_amiga_to_pc(unsigned char status)
+{
+ unsigned char ret = PARPORT_STATUS_BUSY | PARPORT_STATUS_ACK | PARPORT_STATUS_ERROR;
+
+ if (status & 1) /* Busy */
+ ret &= ~PARPORT_STATUS_BUSY;
+ if (status & 2) /* PaperOut */
+ ret |= PARPORT_STATUS_PAPEROUT;
+ if (status & 4) /* Selected */
+ ret |= PARPORT_STATUS_SELECT;
+ /* the rest is not connected or handled autonomously in hardware */
+
+ return ret;
+}
+
+static unsigned char amiga_read_status(struct parport *p)
+{
+ unsigned char status;
+
+ status = status_amiga_to_pc(ciab.pra & 7);
+ pr_debug("read_status %02x\n", status);
+ return status;
+}
+
+static void amiga_enable_irq(struct parport *p)
+{
+ enable_irq(IRQ_AMIGA_CIAA_FLG);
+}
+
+static void amiga_disable_irq(struct parport *p)
+{
+ disable_irq(IRQ_AMIGA_CIAA_FLG);
+}
+
+static void amiga_data_forward(struct parport *p)
+{
+ pr_debug("forward\n");
+ ciaa.ddrb = 0xff; /* all pins output */
+ mb();
+}
+
+static void amiga_data_reverse(struct parport *p)
+{
+ pr_debug("reverse\n");
+ ciaa.ddrb = 0; /* all pins input */
+ mb();
+}
+
+static void amiga_init_state(struct pardevice *dev, struct parport_state *s)
+{
+ s->u.amiga.data = 0;
+ s->u.amiga.datadir = 255;
+ s->u.amiga.status = 0;
+ s->u.amiga.statusdir = 0;
+}
+
+static void amiga_save_state(struct parport *p, struct parport_state *s)
+{
+ mb();
+ s->u.amiga.data = ciaa.prb;
+ s->u.amiga.datadir = ciaa.ddrb;
+ s->u.amiga.status = ciab.pra & 7;
+ s->u.amiga.statusdir = ciab.ddra & 7;
+ mb();
+}
+
+static void amiga_restore_state(struct parport *p, struct parport_state *s)
+{
+ mb();
+ ciaa.prb = s->u.amiga.data;
+ ciaa.ddrb = s->u.amiga.datadir;
+ ciab.pra |= (ciab.pra & 0xf8) | s->u.amiga.status;
+ ciab.ddra |= (ciab.ddra & 0xf8) | s->u.amiga.statusdir;
+ mb();
+}
+
+static struct parport_operations pp_amiga_ops = {
+ .write_data = amiga_write_data,
+ .read_data = amiga_read_data,
+
+ .write_control = amiga_write_control,
+ .read_control = amiga_read_control,
+ .frob_control = amiga_frob_control,
+
+ .read_status = amiga_read_status,
+
+ .enable_irq = amiga_enable_irq,
+ .disable_irq = amiga_disable_irq,
+
+ .data_forward = amiga_data_forward,
+ .data_reverse = amiga_data_reverse,
+
+ .init_state = amiga_init_state,
+ .save_state = amiga_save_state,
+ .restore_state = amiga_restore_state,
+
+ .epp_write_data = parport_ieee1284_epp_write_data,
+ .epp_read_data = parport_ieee1284_epp_read_data,
+ .epp_write_addr = parport_ieee1284_epp_write_addr,
+ .epp_read_addr = parport_ieee1284_epp_read_addr,
+
+ .ecp_write_data = parport_ieee1284_ecp_write_data,
+ .ecp_read_data = parport_ieee1284_ecp_read_data,
+ .ecp_write_addr = parport_ieee1284_ecp_write_addr,
+
+ .compat_write_data = parport_ieee1284_write_compat,
+ .nibble_read_data = parport_ieee1284_read_nibble,
+ .byte_read_data = parport_ieee1284_read_byte,
+
+ .owner = THIS_MODULE,
+};
+
+/* ----------- Initialisation code --------------------------------- */
+
+static int __init amiga_parallel_probe(struct platform_device *pdev)
+{
+ struct parport *p;
+ int err;
+
+ ciaa.ddrb = 0xff;
+ ciab.ddra &= 0xf8;
+ mb();
+
+ p = parport_register_port((unsigned long)&ciaa.prb, IRQ_AMIGA_CIAA_FLG,
+ PARPORT_DMA_NONE, &pp_amiga_ops);
+ if (!p)
+ return -EBUSY;
+
+ err = request_irq(IRQ_AMIGA_CIAA_FLG, parport_irq_handler, 0, p->name,
+ p);
+ if (err)
+ goto out_irq;
+
+ pr_info("%s: Amiga built-in port using irq\n", p->name);
+ /* XXX: set operating mode */
+ parport_announce_port(p);
+
+ platform_set_drvdata(pdev, p);
+
+ return 0;
+
+out_irq:
+ parport_put_port(p);
+ return err;
+}
+
+static int __exit amiga_parallel_remove(struct platform_device *pdev)
+{
+ struct parport *port = platform_get_drvdata(pdev);
+
+ parport_remove_port(port);
+ if (port->irq != PARPORT_IRQ_NONE)
+ free_irq(IRQ_AMIGA_CIAA_FLG, port);
+ parport_put_port(port);
+ return 0;
+}
+
+static struct platform_driver amiga_parallel_driver = {
+ .remove = __exit_p(amiga_parallel_remove),
+ .driver = {
+ .name = "amiga-parallel",
+ },
+};
+
+module_platform_driver_probe(amiga_parallel_driver, amiga_parallel_probe);
+
+MODULE_AUTHOR("Joerg Dorchain <joerg@dorchain.net>");
+MODULE_DESCRIPTION("Parport Driver for Amiga builtin Port");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:amiga-parallel");