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/memory/atmel-ebi.c | 648 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 648 insertions(+) create mode 100644 drivers/memory/atmel-ebi.c (limited to 'drivers/memory/atmel-ebi.c') diff --git a/drivers/memory/atmel-ebi.c b/drivers/memory/atmel-ebi.c new file mode 100644 index 000000000..e749dcb3d --- /dev/null +++ b/drivers/memory/atmel-ebi.c @@ -0,0 +1,648 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * EBI driver for Atmel chips + * inspired by the fsl weim bus driver + * + * Copyright (C) 2013 Jean-Jacques Hiblot + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define AT91_EBI_NUM_CS 8 + +struct atmel_ebi_dev_config { + int cs; + struct atmel_smc_cs_conf smcconf; +}; + +struct atmel_ebi; + +struct atmel_ebi_dev { + struct list_head node; + struct atmel_ebi *ebi; + u32 mode; + int numcs; + struct atmel_ebi_dev_config configs[]; +}; + +struct atmel_ebi_caps { + unsigned int available_cs; + unsigned int ebi_csa_offs; + const char *regmap_name; + void (*get_config)(struct atmel_ebi_dev *ebid, + struct atmel_ebi_dev_config *conf); + int (*xlate_config)(struct atmel_ebi_dev *ebid, + struct device_node *configs_np, + struct atmel_ebi_dev_config *conf); + void (*apply_config)(struct atmel_ebi_dev *ebid, + struct atmel_ebi_dev_config *conf); +}; + +struct atmel_ebi { + struct clk *clk; + struct regmap *regmap; + struct { + struct regmap *regmap; + struct clk *clk; + const struct atmel_hsmc_reg_layout *layout; + } smc; + + struct device *dev; + const struct atmel_ebi_caps *caps; + struct list_head devs; +}; + +struct atmel_smc_timing_xlate { + const char *name; + int (*converter)(struct atmel_smc_cs_conf *conf, + unsigned int shift, unsigned int nycles); + unsigned int shift; +}; + +#define ATMEL_SMC_SETUP_XLATE(nm, pos) \ + { .name = nm, .converter = atmel_smc_cs_conf_set_setup, .shift = pos} + +#define ATMEL_SMC_PULSE_XLATE(nm, pos) \ + { .name = nm, .converter = atmel_smc_cs_conf_set_pulse, .shift = pos} + +#define ATMEL_SMC_CYCLE_XLATE(nm, pos) \ + { .name = nm, .converter = atmel_smc_cs_conf_set_cycle, .shift = pos} + +static void at91sam9_ebi_get_config(struct atmel_ebi_dev *ebid, + struct atmel_ebi_dev_config *conf) +{ + atmel_smc_cs_conf_get(ebid->ebi->smc.regmap, conf->cs, + &conf->smcconf); +} + +static void sama5_ebi_get_config(struct atmel_ebi_dev *ebid, + struct atmel_ebi_dev_config *conf) +{ + atmel_hsmc_cs_conf_get(ebid->ebi->smc.regmap, ebid->ebi->smc.layout, + conf->cs, &conf->smcconf); +} + +static const struct atmel_smc_timing_xlate timings_xlate_table[] = { + ATMEL_SMC_SETUP_XLATE("atmel,smc-ncs-rd-setup-ns", + ATMEL_SMC_NCS_RD_SHIFT), + ATMEL_SMC_SETUP_XLATE("atmel,smc-ncs-wr-setup-ns", + ATMEL_SMC_NCS_WR_SHIFT), + ATMEL_SMC_SETUP_XLATE("atmel,smc-nrd-setup-ns", ATMEL_SMC_NRD_SHIFT), + ATMEL_SMC_SETUP_XLATE("atmel,smc-nwe-setup-ns", ATMEL_SMC_NWE_SHIFT), + ATMEL_SMC_PULSE_XLATE("atmel,smc-ncs-rd-pulse-ns", + ATMEL_SMC_NCS_RD_SHIFT), + ATMEL_SMC_PULSE_XLATE("atmel,smc-ncs-wr-pulse-ns", + ATMEL_SMC_NCS_WR_SHIFT), + ATMEL_SMC_PULSE_XLATE("atmel,smc-nrd-pulse-ns", ATMEL_SMC_NRD_SHIFT), + ATMEL_SMC_PULSE_XLATE("atmel,smc-nwe-pulse-ns", ATMEL_SMC_NWE_SHIFT), + ATMEL_SMC_CYCLE_XLATE("atmel,smc-nrd-cycle-ns", ATMEL_SMC_NRD_SHIFT), + ATMEL_SMC_CYCLE_XLATE("atmel,smc-nwe-cycle-ns", ATMEL_SMC_NWE_SHIFT), +}; + +static int atmel_ebi_xslate_smc_timings(struct atmel_ebi_dev *ebid, + struct device_node *np, + struct atmel_smc_cs_conf *smcconf) +{ + unsigned int clk_rate = clk_get_rate(ebid->ebi->clk); + unsigned int clk_period_ns = NSEC_PER_SEC / clk_rate; + bool required = false; + unsigned int ncycles; + int ret, i; + u32 val; + + ret = of_property_read_u32(np, "atmel,smc-tdf-ns", &val); + if (!ret) { + required = true; + ncycles = DIV_ROUND_UP(val, clk_period_ns); + if (ncycles > ATMEL_SMC_MODE_TDF_MAX) { + ret = -EINVAL; + goto out; + } + + if (ncycles < ATMEL_SMC_MODE_TDF_MIN) + ncycles = ATMEL_SMC_MODE_TDF_MIN; + + smcconf->mode |= ATMEL_SMC_MODE_TDF(ncycles); + } + + for (i = 0; i < ARRAY_SIZE(timings_xlate_table); i++) { + const struct atmel_smc_timing_xlate *xlate; + + xlate = &timings_xlate_table[i]; + + ret = of_property_read_u32(np, xlate->name, &val); + if (ret) { + if (!required) + continue; + else + break; + } + + if (!required) { + ret = -EINVAL; + break; + } + + ncycles = DIV_ROUND_UP(val, clk_period_ns); + ret = xlate->converter(smcconf, xlate->shift, ncycles); + if (ret) + goto out; + } + +out: + if (ret) { + dev_err(ebid->ebi->dev, + "missing or invalid timings definition in %pOF", + np); + return ret; + } + + return required; +} + +static int atmel_ebi_xslate_smc_config(struct atmel_ebi_dev *ebid, + struct device_node *np, + struct atmel_ebi_dev_config *conf) +{ + struct atmel_smc_cs_conf *smcconf = &conf->smcconf; + bool required = false; + const char *tmp_str; + u32 tmp; + int ret; + + ret = of_property_read_u32(np, "atmel,smc-bus-width", &tmp); + if (!ret) { + switch (tmp) { + case 8: + smcconf->mode |= ATMEL_SMC_MODE_DBW_8; + break; + + case 16: + smcconf->mode |= ATMEL_SMC_MODE_DBW_16; + break; + + case 32: + smcconf->mode |= ATMEL_SMC_MODE_DBW_32; + break; + + default: + return -EINVAL; + } + + required = true; + } + + if (of_property_read_bool(np, "atmel,smc-tdf-optimized")) { + smcconf->mode |= ATMEL_SMC_MODE_TDFMODE_OPTIMIZED; + required = true; + } + + tmp_str = NULL; + of_property_read_string(np, "atmel,smc-byte-access-type", &tmp_str); + if (tmp_str && !strcmp(tmp_str, "write")) { + smcconf->mode |= ATMEL_SMC_MODE_BAT_WRITE; + required = true; + } + + tmp_str = NULL; + of_property_read_string(np, "atmel,smc-read-mode", &tmp_str); + if (tmp_str && !strcmp(tmp_str, "nrd")) { + smcconf->mode |= ATMEL_SMC_MODE_READMODE_NRD; + required = true; + } + + tmp_str = NULL; + of_property_read_string(np, "atmel,smc-write-mode", &tmp_str); + if (tmp_str && !strcmp(tmp_str, "nwe")) { + smcconf->mode |= ATMEL_SMC_MODE_WRITEMODE_NWE; + required = true; + } + + tmp_str = NULL; + of_property_read_string(np, "atmel,smc-exnw-mode", &tmp_str); + if (tmp_str) { + if (!strcmp(tmp_str, "frozen")) + smcconf->mode |= ATMEL_SMC_MODE_EXNWMODE_FROZEN; + else if (!strcmp(tmp_str, "ready")) + smcconf->mode |= ATMEL_SMC_MODE_EXNWMODE_READY; + else if (strcmp(tmp_str, "disabled")) + return -EINVAL; + + required = true; + } + + ret = of_property_read_u32(np, "atmel,smc-page-mode", &tmp); + if (!ret) { + switch (tmp) { + case 4: + smcconf->mode |= ATMEL_SMC_MODE_PS_4; + break; + + case 8: + smcconf->mode |= ATMEL_SMC_MODE_PS_8; + break; + + case 16: + smcconf->mode |= ATMEL_SMC_MODE_PS_16; + break; + + case 32: + smcconf->mode |= ATMEL_SMC_MODE_PS_32; + break; + + default: + return -EINVAL; + } + + smcconf->mode |= ATMEL_SMC_MODE_PMEN; + required = true; + } + + ret = atmel_ebi_xslate_smc_timings(ebid, np, &conf->smcconf); + if (ret < 0) + return -EINVAL; + + if ((ret > 0 && !required) || (!ret && required)) { + dev_err(ebid->ebi->dev, "missing atmel,smc- properties in %pOF", + np); + return -EINVAL; + } + + return required; +} + +static void at91sam9_ebi_apply_config(struct atmel_ebi_dev *ebid, + struct atmel_ebi_dev_config *conf) +{ + atmel_smc_cs_conf_apply(ebid->ebi->smc.regmap, conf->cs, + &conf->smcconf); +} + +static void sama5_ebi_apply_config(struct atmel_ebi_dev *ebid, + struct atmel_ebi_dev_config *conf) +{ + atmel_hsmc_cs_conf_apply(ebid->ebi->smc.regmap, ebid->ebi->smc.layout, + conf->cs, &conf->smcconf); +} + +static int atmel_ebi_dev_setup(struct atmel_ebi *ebi, struct device_node *np, + int reg_cells) +{ + const struct atmel_ebi_caps *caps = ebi->caps; + struct atmel_ebi_dev_config conf = { }; + struct device *dev = ebi->dev; + struct atmel_ebi_dev *ebid; + unsigned long cslines = 0; + int ret, numcs = 0, nentries, i; + bool apply = false; + u32 cs; + + nentries = of_property_count_elems_of_size(np, "reg", + reg_cells * sizeof(u32)); + for (i = 0; i < nentries; i++) { + ret = of_property_read_u32_index(np, "reg", i * reg_cells, + &cs); + if (ret) + return ret; + + if (cs >= AT91_EBI_NUM_CS || + !(ebi->caps->available_cs & BIT(cs))) { + dev_err(dev, "invalid reg property in %pOF\n", np); + return -EINVAL; + } + + if (!test_and_set_bit(cs, &cslines)) + numcs++; + } + + if (!numcs) { + dev_err(dev, "invalid reg property in %pOF\n", np); + return -EINVAL; + } + + ebid = devm_kzalloc(ebi->dev, struct_size(ebid, configs, numcs), + GFP_KERNEL); + if (!ebid) + return -ENOMEM; + + ebid->ebi = ebi; + ebid->numcs = numcs; + + ret = caps->xlate_config(ebid, np, &conf); + if (ret < 0) + return ret; + else if (ret) + apply = true; + + i = 0; + for_each_set_bit(cs, &cslines, AT91_EBI_NUM_CS) { + ebid->configs[i].cs = cs; + + if (apply) { + conf.cs = cs; + caps->apply_config(ebid, &conf); + } + + caps->get_config(ebid, &ebid->configs[i]); + + /* + * Attach the EBI device to the generic SMC logic if at least + * one "atmel,smc-" property is present. + */ + if (ebi->caps->ebi_csa_offs && apply) + regmap_update_bits(ebi->regmap, + ebi->caps->ebi_csa_offs, + BIT(cs), 0); + + i++; + } + + list_add_tail(&ebid->node, &ebi->devs); + + return 0; +} + +static const struct atmel_ebi_caps at91sam9260_ebi_caps = { + .available_cs = 0xff, + .ebi_csa_offs = AT91SAM9260_MATRIX_EBICSA, + .regmap_name = "atmel,matrix", + .get_config = at91sam9_ebi_get_config, + .xlate_config = atmel_ebi_xslate_smc_config, + .apply_config = at91sam9_ebi_apply_config, +}; + +static const struct atmel_ebi_caps at91sam9261_ebi_caps = { + .available_cs = 0xff, + .ebi_csa_offs = AT91SAM9261_MATRIX_EBICSA, + .regmap_name = "atmel,matrix", + .get_config = at91sam9_ebi_get_config, + .xlate_config = atmel_ebi_xslate_smc_config, + .apply_config = at91sam9_ebi_apply_config, +}; + +static const struct atmel_ebi_caps at91sam9263_ebi0_caps = { + .available_cs = 0x3f, + .ebi_csa_offs = AT91SAM9263_MATRIX_EBI0CSA, + .regmap_name = "atmel,matrix", + .get_config = at91sam9_ebi_get_config, + .xlate_config = atmel_ebi_xslate_smc_config, + .apply_config = at91sam9_ebi_apply_config, +}; + +static const struct atmel_ebi_caps at91sam9263_ebi1_caps = { + .available_cs = 0x7, + .ebi_csa_offs = AT91SAM9263_MATRIX_EBI1CSA, + .regmap_name = "atmel,matrix", + .get_config = at91sam9_ebi_get_config, + .xlate_config = atmel_ebi_xslate_smc_config, + .apply_config = at91sam9_ebi_apply_config, +}; + +static const struct atmel_ebi_caps at91sam9rl_ebi_caps = { + .available_cs = 0x3f, + .ebi_csa_offs = AT91SAM9RL_MATRIX_EBICSA, + .regmap_name = "atmel,matrix", + .get_config = at91sam9_ebi_get_config, + .xlate_config = atmel_ebi_xslate_smc_config, + .apply_config = at91sam9_ebi_apply_config, +}; + +static const struct atmel_ebi_caps at91sam9g45_ebi_caps = { + .available_cs = 0x3f, + .ebi_csa_offs = AT91SAM9G45_MATRIX_EBICSA, + .regmap_name = "atmel,matrix", + .get_config = at91sam9_ebi_get_config, + .xlate_config = atmel_ebi_xslate_smc_config, + .apply_config = at91sam9_ebi_apply_config, +}; + +static const struct atmel_ebi_caps at91sam9x5_ebi_caps = { + .available_cs = 0x3f, + .ebi_csa_offs = AT91SAM9X5_MATRIX_EBICSA, + .regmap_name = "atmel,matrix", + .get_config = at91sam9_ebi_get_config, + .xlate_config = atmel_ebi_xslate_smc_config, + .apply_config = at91sam9_ebi_apply_config, +}; + +static const struct atmel_ebi_caps sama5d3_ebi_caps = { + .available_cs = 0xf, + .get_config = sama5_ebi_get_config, + .xlate_config = atmel_ebi_xslate_smc_config, + .apply_config = sama5_ebi_apply_config, +}; + +static const struct atmel_ebi_caps sam9x60_ebi_caps = { + .available_cs = 0x3f, + .ebi_csa_offs = AT91_SFR_CCFG_EBICSA, + .regmap_name = "microchip,sfr", + .get_config = at91sam9_ebi_get_config, + .xlate_config = atmel_ebi_xslate_smc_config, + .apply_config = at91sam9_ebi_apply_config, +}; + +static const struct of_device_id atmel_ebi_id_table[] = { + { + .compatible = "atmel,at91sam9260-ebi", + .data = &at91sam9260_ebi_caps, + }, + { + .compatible = "atmel,at91sam9261-ebi", + .data = &at91sam9261_ebi_caps, + }, + { + .compatible = "atmel,at91sam9263-ebi0", + .data = &at91sam9263_ebi0_caps, + }, + { + .compatible = "atmel,at91sam9263-ebi1", + .data = &at91sam9263_ebi1_caps, + }, + { + .compatible = "atmel,at91sam9rl-ebi", + .data = &at91sam9rl_ebi_caps, + }, + { + .compatible = "atmel,at91sam9g45-ebi", + .data = &at91sam9g45_ebi_caps, + }, + { + .compatible = "atmel,at91sam9x5-ebi", + .data = &at91sam9x5_ebi_caps, + }, + { + .compatible = "atmel,sama5d3-ebi", + .data = &sama5d3_ebi_caps, + }, + { + .compatible = "microchip,sam9x60-ebi", + .data = &sam9x60_ebi_caps, + }, + { /* sentinel */ } +}; + +static int atmel_ebi_dev_disable(struct atmel_ebi *ebi, struct device_node *np) +{ + struct device *dev = ebi->dev; + struct property *newprop; + + newprop = devm_kzalloc(dev, sizeof(*newprop), GFP_KERNEL); + if (!newprop) + return -ENOMEM; + + newprop->name = devm_kstrdup(dev, "status", GFP_KERNEL); + if (!newprop->name) + return -ENOMEM; + + newprop->value = devm_kstrdup(dev, "disabled", GFP_KERNEL); + if (!newprop->value) + return -ENOMEM; + + newprop->length = sizeof("disabled"); + + return of_update_property(np, newprop); +} + +static int atmel_ebi_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *child, *np = dev->of_node, *smc_np; + const struct of_device_id *match; + struct atmel_ebi *ebi; + int ret, reg_cells; + struct clk *clk; + u32 val; + + match = of_match_device(atmel_ebi_id_table, dev); + if (!match || !match->data) + return -EINVAL; + + ebi = devm_kzalloc(dev, sizeof(*ebi), GFP_KERNEL); + if (!ebi) + return -ENOMEM; + + platform_set_drvdata(pdev, ebi); + + INIT_LIST_HEAD(&ebi->devs); + ebi->caps = match->data; + ebi->dev = dev; + + clk = devm_clk_get(dev, NULL); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + ebi->clk = clk; + + smc_np = of_parse_phandle(dev->of_node, "atmel,smc", 0); + + ebi->smc.regmap = syscon_node_to_regmap(smc_np); + if (IS_ERR(ebi->smc.regmap)) { + ret = PTR_ERR(ebi->smc.regmap); + goto put_node; + } + + ebi->smc.layout = atmel_hsmc_get_reg_layout(smc_np); + if (IS_ERR(ebi->smc.layout)) { + ret = PTR_ERR(ebi->smc.layout); + goto put_node; + } + + ebi->smc.clk = of_clk_get(smc_np, 0); + if (IS_ERR(ebi->smc.clk)) { + if (PTR_ERR(ebi->smc.clk) != -ENOENT) { + ret = PTR_ERR(ebi->smc.clk); + goto put_node; + } + + ebi->smc.clk = NULL; + } + of_node_put(smc_np); + ret = clk_prepare_enable(ebi->smc.clk); + if (ret) + return ret; + + /* + * The sama5d3 does not provide an EBICSA register and thus does need + * to access it. + */ + if (ebi->caps->ebi_csa_offs) { + ebi->regmap = + syscon_regmap_lookup_by_phandle(np, + ebi->caps->regmap_name); + if (IS_ERR(ebi->regmap)) + return PTR_ERR(ebi->regmap); + } + + ret = of_property_read_u32(np, "#address-cells", &val); + if (ret) { + dev_err(dev, "missing #address-cells property\n"); + return ret; + } + + reg_cells = val; + + ret = of_property_read_u32(np, "#size-cells", &val); + if (ret) { + dev_err(dev, "missing #address-cells property\n"); + return ret; + } + + reg_cells += val; + + for_each_available_child_of_node(np, child) { + if (!of_find_property(child, "reg", NULL)) + continue; + + ret = atmel_ebi_dev_setup(ebi, child, reg_cells); + if (ret) { + dev_err(dev, "failed to configure EBI bus for %pOF, disabling the device", + child); + + ret = atmel_ebi_dev_disable(ebi, child); + if (ret) { + of_node_put(child); + return ret; + } + } + } + + return of_platform_populate(np, NULL, NULL, dev); + +put_node: + of_node_put(smc_np); + return ret; +} + +static __maybe_unused int atmel_ebi_resume(struct device *dev) +{ + struct atmel_ebi *ebi = dev_get_drvdata(dev); + struct atmel_ebi_dev *ebid; + + list_for_each_entry(ebid, &ebi->devs, node) { + int i; + + for (i = 0; i < ebid->numcs; i++) + ebid->ebi->caps->apply_config(ebid, &ebid->configs[i]); + } + + return 0; +} + +static SIMPLE_DEV_PM_OPS(atmel_ebi_pm_ops, NULL, atmel_ebi_resume); + +static struct platform_driver atmel_ebi_driver = { + .driver = { + .name = "atmel-ebi", + .of_match_table = atmel_ebi_id_table, + .pm = &atmel_ebi_pm_ops, + }, +}; +builtin_platform_driver_probe(atmel_ebi_driver, atmel_ebi_probe); -- cgit v1.2.3