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(). ... --- arch/arm/mach-s3c/gpio-samsung.c | 888 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 888 insertions(+) create mode 100644 arch/arm/mach-s3c/gpio-samsung.c (limited to 'arch/arm/mach-s3c/gpio-samsung.c') diff --git a/arch/arm/mach-s3c/gpio-samsung.c b/arch/arm/mach-s3c/gpio-samsung.c new file mode 100644 index 000000000..87daaa09e --- /dev/null +++ b/arch/arm/mach-s3c/gpio-samsung.c @@ -0,0 +1,888 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Copyright (c) 2009-2011 Samsung Electronics Co., Ltd. +// http://www.samsung.com/ +// +// Copyright 2008 Openmoko, Inc. +// Copyright 2008 Simtec Electronics +// Ben Dooks +// http://armlinux.simtec.co.uk/ +// +// Samsung - GPIOlib support + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include "irqs.h" +#include "map.h" +#include "regs-gpio.h" +#include "gpio-samsung.h" + +#include "cpu.h" +#include "gpio-core.h" +#include "gpio-cfg.h" +#include "gpio-cfg-helpers.h" +#include "pm.h" + +static int samsung_gpio_setpull_updown(struct samsung_gpio_chip *chip, + unsigned int off, samsung_gpio_pull_t pull) +{ + void __iomem *reg = chip->base + 0x08; + int shift = off * 2; + u32 pup; + + pup = __raw_readl(reg); + pup &= ~(3 << shift); + pup |= pull << shift; + __raw_writel(pup, reg); + + return 0; +} + +static samsung_gpio_pull_t samsung_gpio_getpull_updown(struct samsung_gpio_chip *chip, + unsigned int off) +{ + void __iomem *reg = chip->base + 0x08; + int shift = off * 2; + u32 pup = __raw_readl(reg); + + pup >>= shift; + pup &= 0x3; + + return (__force samsung_gpio_pull_t)pup; +} + +static int samsung_gpio_setcfg_2bit(struct samsung_gpio_chip *chip, + unsigned int off, unsigned int cfg) +{ + void __iomem *reg = chip->base; + unsigned int shift = off * 2; + u32 con; + + if (samsung_gpio_is_cfg_special(cfg)) { + cfg &= 0xf; + if (cfg > 3) + return -EINVAL; + + cfg <<= shift; + } + + con = __raw_readl(reg); + con &= ~(0x3 << shift); + con |= cfg; + __raw_writel(con, reg); + + return 0; +} + +/* + * samsung_gpio_getcfg_2bit - Samsung 2bit style GPIO configuration read. + * @chip: The gpio chip that is being configured. + * @off: The offset for the GPIO being configured. + * + * The reverse of samsung_gpio_setcfg_2bit(). Will return a value which + * could be directly passed back to samsung_gpio_setcfg_2bit(), from the + * S3C_GPIO_SPECIAL() macro. + */ + +static unsigned int samsung_gpio_getcfg_2bit(struct samsung_gpio_chip *chip, + unsigned int off) +{ + u32 con; + + con = __raw_readl(chip->base); + con >>= off * 2; + con &= 3; + + /* this conversion works for IN and OUT as well as special mode */ + return S3C_GPIO_SPECIAL(con); +} + +/* + * samsung_gpio_setcfg_4bit - Samsung 4bit single register GPIO config. + * @chip: The gpio chip that is being configured. + * @off: The offset for the GPIO being configured. + * @cfg: The configuration value to set. + * + * This helper deal with the GPIO cases where the control register has 4 bits + * of control per GPIO, generally in the form of: + * 0000 = Input + * 0001 = Output + * others = Special functions (dependent on bank) + * + * Note, since the code to deal with the case where there are two control + * registers instead of one, we do not have a separate set of functions for + * each case. + */ + +static int samsung_gpio_setcfg_4bit(struct samsung_gpio_chip *chip, + unsigned int off, unsigned int cfg) +{ + void __iomem *reg = chip->base; + unsigned int shift = (off & 7) * 4; + u32 con; + + if (off < 8 && chip->chip.ngpio > 8) + reg -= 4; + + if (samsung_gpio_is_cfg_special(cfg)) { + cfg &= 0xf; + cfg <<= shift; + } + + con = __raw_readl(reg); + con &= ~(0xf << shift); + con |= cfg; + __raw_writel(con, reg); + + return 0; +} + +/* + * samsung_gpio_getcfg_4bit - Samsung 4bit single register GPIO config read. + * @chip: The gpio chip that is being configured. + * @off: The offset for the GPIO being configured. + * + * The reverse of samsung_gpio_setcfg_4bit(), turning a gpio configuration + * register setting into a value the software can use, such as could be passed + * to samsung_gpio_setcfg_4bit(). + * + * @sa samsung_gpio_getcfg_2bit + */ + +static unsigned samsung_gpio_getcfg_4bit(struct samsung_gpio_chip *chip, + unsigned int off) +{ + void __iomem *reg = chip->base; + unsigned int shift = (off & 7) * 4; + u32 con; + + if (off < 8 && chip->chip.ngpio > 8) + reg -= 4; + + con = __raw_readl(reg); + con >>= shift; + con &= 0xf; + + /* this conversion works for IN and OUT as well as special mode */ + return S3C_GPIO_SPECIAL(con); +} + +static void __init samsung_gpiolib_set_cfg(struct samsung_gpio_cfg *chipcfg, + int nr_chips) +{ + for (; nr_chips > 0; nr_chips--, chipcfg++) { + if (!chipcfg->set_config) + chipcfg->set_config = samsung_gpio_setcfg_4bit; + if (!chipcfg->get_config) + chipcfg->get_config = samsung_gpio_getcfg_4bit; + if (!chipcfg->set_pull) + chipcfg->set_pull = samsung_gpio_setpull_updown; + if (!chipcfg->get_pull) + chipcfg->get_pull = samsung_gpio_getpull_updown; + } +} + +static struct samsung_gpio_cfg samsung_gpio_cfgs[] = { + [0] = { + .cfg_eint = 0x0, + }, + [1] = { + .cfg_eint = 0x3, + }, + [2] = { + .cfg_eint = 0x7, + }, + [3] = { + .cfg_eint = 0xF, + }, + [4] = { + .cfg_eint = 0x0, + .set_config = samsung_gpio_setcfg_2bit, + .get_config = samsung_gpio_getcfg_2bit, + }, + [5] = { + .cfg_eint = 0x2, + .set_config = samsung_gpio_setcfg_2bit, + .get_config = samsung_gpio_getcfg_2bit, + }, + [6] = { + .cfg_eint = 0x3, + .set_config = samsung_gpio_setcfg_2bit, + .get_config = samsung_gpio_getcfg_2bit, + }, + [7] = { + .set_config = samsung_gpio_setcfg_2bit, + .get_config = samsung_gpio_getcfg_2bit, + }, +}; + +/* + * Default routines for controlling GPIO, based on the original S3C24XX + * GPIO functions which deal with the case where each gpio bank of the + * chip is as following: + * + * base + 0x00: Control register, 2 bits per gpio + * gpio n: 2 bits starting at (2*n) + * 00 = input, 01 = output, others mean special-function + * base + 0x04: Data register, 1 bit per gpio + * bit n: data bit n +*/ + +static int samsung_gpiolib_2bit_input(struct gpio_chip *chip, unsigned offset) +{ + struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip); + void __iomem *base = ourchip->base; + unsigned long flags; + unsigned long con; + + samsung_gpio_lock(ourchip, flags); + + con = __raw_readl(base + 0x00); + con &= ~(3 << (offset * 2)); + + __raw_writel(con, base + 0x00); + + samsung_gpio_unlock(ourchip, flags); + return 0; +} + +static int samsung_gpiolib_2bit_output(struct gpio_chip *chip, + unsigned offset, int value) +{ + struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip); + void __iomem *base = ourchip->base; + unsigned long flags; + unsigned long dat; + unsigned long con; + + samsung_gpio_lock(ourchip, flags); + + dat = __raw_readl(base + 0x04); + dat &= ~(1 << offset); + if (value) + dat |= 1 << offset; + __raw_writel(dat, base + 0x04); + + con = __raw_readl(base + 0x00); + con &= ~(3 << (offset * 2)); + con |= 1 << (offset * 2); + + __raw_writel(con, base + 0x00); + __raw_writel(dat, base + 0x04); + + samsung_gpio_unlock(ourchip, flags); + return 0; +} + +/* + * The samsung_gpiolib_4bit routines are to control the gpio banks where + * the gpio configuration register (GPxCON) has 4 bits per GPIO, as the + * following example: + * + * base + 0x00: Control register, 4 bits per gpio + * gpio n: 4 bits starting at (4*n) + * 0000 = input, 0001 = output, others mean special-function + * base + 0x04: Data register, 1 bit per gpio + * bit n: data bit n + * + * Note, since the data register is one bit per gpio and is at base + 0x4 + * we can use samsung_gpiolib_get and samsung_gpiolib_set to change the + * state of the output. + */ + +static int samsung_gpiolib_4bit_input(struct gpio_chip *chip, + unsigned int offset) +{ + struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip); + void __iomem *base = ourchip->base; + unsigned long con; + + con = __raw_readl(base + GPIOCON_OFF); + if (ourchip->bitmap_gpio_int & BIT(offset)) + con |= 0xf << con_4bit_shift(offset); + else + con &= ~(0xf << con_4bit_shift(offset)); + __raw_writel(con, base + GPIOCON_OFF); + + pr_debug("%s: %p: CON now %08lx\n", __func__, base, con); + + return 0; +} + +static int samsung_gpiolib_4bit_output(struct gpio_chip *chip, + unsigned int offset, int value) +{ + struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip); + void __iomem *base = ourchip->base; + unsigned long con; + unsigned long dat; + + con = __raw_readl(base + GPIOCON_OFF); + con &= ~(0xf << con_4bit_shift(offset)); + con |= 0x1 << con_4bit_shift(offset); + + dat = __raw_readl(base + GPIODAT_OFF); + + if (value) + dat |= 1 << offset; + else + dat &= ~(1 << offset); + + __raw_writel(dat, base + GPIODAT_OFF); + __raw_writel(con, base + GPIOCON_OFF); + __raw_writel(dat, base + GPIODAT_OFF); + + pr_debug("%s: %p: CON %08lx, DAT %08lx\n", __func__, base, con, dat); + + return 0; +} + +/* + * The next set of routines are for the case where the GPIO configuration + * registers are 4 bits per GPIO but there is more than one register (the + * bank has more than 8 GPIOs. + * + * This case is the similar to the 4 bit case, but the registers are as + * follows: + * + * base + 0x00: Control register, 4 bits per gpio (lower 8 GPIOs) + * gpio n: 4 bits starting at (4*n) + * 0000 = input, 0001 = output, others mean special-function + * base + 0x04: Control register, 4 bits per gpio (up to 8 additions GPIOs) + * gpio n: 4 bits starting at (4*n) + * 0000 = input, 0001 = output, others mean special-function + * base + 0x08: Data register, 1 bit per gpio + * bit n: data bit n + * + * To allow us to use the samsung_gpiolib_get and samsung_gpiolib_set + * routines we store the 'base + 0x4' address so that these routines see + * the data register at ourchip->base + 0x04. + */ + +static int samsung_gpiolib_4bit2_input(struct gpio_chip *chip, + unsigned int offset) +{ + struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip); + void __iomem *base = ourchip->base; + void __iomem *regcon = base; + unsigned long con; + + if (offset > 7) + offset -= 8; + else + regcon -= 4; + + con = __raw_readl(regcon); + con &= ~(0xf << con_4bit_shift(offset)); + __raw_writel(con, regcon); + + pr_debug("%s: %p: CON %08lx\n", __func__, base, con); + + return 0; +} + +static int samsung_gpiolib_4bit2_output(struct gpio_chip *chip, + unsigned int offset, int value) +{ + struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip); + void __iomem *base = ourchip->base; + void __iomem *regcon = base; + unsigned long con; + unsigned long dat; + unsigned con_offset = offset; + + if (con_offset > 7) + con_offset -= 8; + else + regcon -= 4; + + con = __raw_readl(regcon); + con &= ~(0xf << con_4bit_shift(con_offset)); + con |= 0x1 << con_4bit_shift(con_offset); + + dat = __raw_readl(base + GPIODAT_OFF); + + if (value) + dat |= 1 << offset; + else + dat &= ~(1 << offset); + + __raw_writel(dat, base + GPIODAT_OFF); + __raw_writel(con, regcon); + __raw_writel(dat, base + GPIODAT_OFF); + + pr_debug("%s: %p: CON %08lx, DAT %08lx\n", __func__, base, con, dat); + + return 0; +} + +static void samsung_gpiolib_set(struct gpio_chip *chip, + unsigned offset, int value) +{ + struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip); + void __iomem *base = ourchip->base; + unsigned long flags; + unsigned long dat; + + samsung_gpio_lock(ourchip, flags); + + dat = __raw_readl(base + 0x04); + dat &= ~(1 << offset); + if (value) + dat |= 1 << offset; + __raw_writel(dat, base + 0x04); + + samsung_gpio_unlock(ourchip, flags); +} + +static int samsung_gpiolib_get(struct gpio_chip *chip, unsigned offset) +{ + struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip); + unsigned long val; + + val = __raw_readl(ourchip->base + 0x04); + val >>= offset; + val &= 1; + + return val; +} + +/* + * CONFIG_S3C_GPIO_TRACK enables the tracking of the s3c specific gpios + * for use with the configuration calls, and other parts of the s3c gpiolib + * support code. + * + * Not all s3c support code will need this, as some configurations of cpu + * may only support one or two different configuration options and have an + * easy gpio to samsung_gpio_chip mapping function. If this is the case, then + * the machine support file should provide its own samsung_gpiolib_getchip() + * and any other necessary functions. + */ + +#ifdef CONFIG_S3C_GPIO_TRACK +struct samsung_gpio_chip *s3c_gpios[S3C_GPIO_END]; + +static __init void s3c_gpiolib_track(struct samsung_gpio_chip *chip) +{ + unsigned int gpn; + int i; + + gpn = chip->chip.base; + for (i = 0; i < chip->chip.ngpio; i++, gpn++) { + BUG_ON(gpn >= ARRAY_SIZE(s3c_gpios)); + s3c_gpios[gpn] = chip; + } +} +#endif /* CONFIG_S3C_GPIO_TRACK */ + +/* + * samsung_gpiolib_add() - add the Samsung gpio_chip. + * @chip: The chip to register + * + * This is a wrapper to gpiochip_add() that takes our specific gpio chip + * information and makes the necessary alterations for the platform and + * notes the information for use with the configuration systems and any + * other parts of the system. + */ + +static void __init samsung_gpiolib_add(struct samsung_gpio_chip *chip) +{ + struct gpio_chip *gc = &chip->chip; + int ret; + + BUG_ON(!chip->base); + BUG_ON(!gc->label); + BUG_ON(!gc->ngpio); + + spin_lock_init(&chip->lock); + + if (!gc->direction_input) + gc->direction_input = samsung_gpiolib_2bit_input; + if (!gc->direction_output) + gc->direction_output = samsung_gpiolib_2bit_output; + if (!gc->set) + gc->set = samsung_gpiolib_set; + if (!gc->get) + gc->get = samsung_gpiolib_get; + +#ifdef CONFIG_PM + if (chip->pm != NULL) { + if (!chip->pm->save || !chip->pm->resume) + pr_err("gpio: %s has missing PM functions\n", + gc->label); + } else + pr_err("gpio: %s has no PM function\n", gc->label); +#endif + + /* gpiochip_add() prints own failure message on error. */ + ret = gpiochip_add_data(gc, chip); + if (ret >= 0) + s3c_gpiolib_track(chip); +} + +static void __init samsung_gpiolib_add_2bit_chips(struct samsung_gpio_chip *chip, + int nr_chips, void __iomem *base, + unsigned int offset) +{ + int i; + + for (i = 0 ; i < nr_chips; i++, chip++) { + chip->chip.direction_input = samsung_gpiolib_2bit_input; + chip->chip.direction_output = samsung_gpiolib_2bit_output; + + if (!chip->config) + chip->config = &samsung_gpio_cfgs[7]; + if (!chip->pm) + chip->pm = __gpio_pm(&samsung_gpio_pm_2bit); + if ((base != NULL) && (chip->base == NULL)) + chip->base = base + ((i) * offset); + + samsung_gpiolib_add(chip); + } +} + +/* + * samsung_gpiolib_add_4bit_chips - 4bit single register GPIO config. + * @chip: The gpio chip that is being configured. + * @nr_chips: The no of chips (gpio ports) for the GPIO being configured. + * + * This helper deal with the GPIO cases where the control register has 4 bits + * of control per GPIO, generally in the form of: + * 0000 = Input + * 0001 = Output + * others = Special functions (dependent on bank) + * + * Note, since the code to deal with the case where there are two control + * registers instead of one, we do not have a separate set of function + * (samsung_gpiolib_add_4bit2_chips)for each case. + */ + +static void __init samsung_gpiolib_add_4bit_chips(struct samsung_gpio_chip *chip, + int nr_chips, void __iomem *base) +{ + int i; + + for (i = 0 ; i < nr_chips; i++, chip++) { + chip->chip.direction_input = samsung_gpiolib_4bit_input; + chip->chip.direction_output = samsung_gpiolib_4bit_output; + + if (!chip->config) + chip->config = &samsung_gpio_cfgs[2]; + if (!chip->pm) + chip->pm = __gpio_pm(&samsung_gpio_pm_4bit); + if ((base != NULL) && (chip->base == NULL)) + chip->base = base + ((i) * 0x20); + + chip->bitmap_gpio_int = 0; + + samsung_gpiolib_add(chip); + } +} + +static void __init samsung_gpiolib_add_4bit2_chips(struct samsung_gpio_chip *chip, + int nr_chips) +{ + for (; nr_chips > 0; nr_chips--, chip++) { + chip->chip.direction_input = samsung_gpiolib_4bit2_input; + chip->chip.direction_output = samsung_gpiolib_4bit2_output; + + if (!chip->config) + chip->config = &samsung_gpio_cfgs[2]; + if (!chip->pm) + chip->pm = __gpio_pm(&samsung_gpio_pm_4bit); + + samsung_gpiolib_add(chip); + } +} + +int samsung_gpiolib_to_irq(struct gpio_chip *chip, unsigned int offset) +{ + struct samsung_gpio_chip *samsung_chip = gpiochip_get_data(chip); + + return samsung_chip->irq_base + offset; +} + +static int s3c64xx_gpiolib_mbank_to_irq(struct gpio_chip *chip, unsigned pin) +{ + return pin < 5 ? IRQ_EINT(23) + pin : -ENXIO; +} + +static int s3c64xx_gpiolib_lbank_to_irq(struct gpio_chip *chip, unsigned pin) +{ + return pin >= 8 ? IRQ_EINT(16) + pin - 8 : -ENXIO; +} + +/* + * GPIO bank summary: + * + * Bank GPIOs Style SlpCon ExtInt Group + * A 8 4Bit Yes 1 + * B 7 4Bit Yes 1 + * C 8 4Bit Yes 2 + * D 5 4Bit Yes 3 + * E 5 4Bit Yes None + * F 16 2Bit Yes 4 [1] + * G 7 4Bit Yes 5 + * H 10 4Bit[2] Yes 6 + * I 16 2Bit Yes None + * J 12 2Bit Yes None + * K 16 4Bit[2] No None + * L 15 4Bit[2] No None + * M 6 4Bit No IRQ_EINT + * N 16 2Bit No IRQ_EINT + * O 16 2Bit Yes 7 + * P 15 2Bit Yes 8 + * Q 9 2Bit Yes 9 + * + * [1] BANKF pins 14,15 do not form part of the external interrupt sources + * [2] BANK has two control registers, GPxCON0 and GPxCON1 + */ + +static struct samsung_gpio_chip s3c64xx_gpios_4bit[] = { + { + .chip = { + .base = S3C64XX_GPA(0), + .ngpio = S3C64XX_GPIO_A_NR, + .label = "GPA", + }, + }, { + .chip = { + .base = S3C64XX_GPB(0), + .ngpio = S3C64XX_GPIO_B_NR, + .label = "GPB", + }, + }, { + .chip = { + .base = S3C64XX_GPC(0), + .ngpio = S3C64XX_GPIO_C_NR, + .label = "GPC", + }, + }, { + .chip = { + .base = S3C64XX_GPD(0), + .ngpio = S3C64XX_GPIO_D_NR, + .label = "GPD", + }, + }, { + .config = &samsung_gpio_cfgs[0], + .chip = { + .base = S3C64XX_GPE(0), + .ngpio = S3C64XX_GPIO_E_NR, + .label = "GPE", + }, + }, { + .base = S3C64XX_GPG_BASE, + .chip = { + .base = S3C64XX_GPG(0), + .ngpio = S3C64XX_GPIO_G_NR, + .label = "GPG", + }, + }, { + .base = S3C64XX_GPM_BASE, + .config = &samsung_gpio_cfgs[1], + .chip = { + .base = S3C64XX_GPM(0), + .ngpio = S3C64XX_GPIO_M_NR, + .label = "GPM", + .to_irq = s3c64xx_gpiolib_mbank_to_irq, + }, + }, +}; + +static struct samsung_gpio_chip s3c64xx_gpios_4bit2[] = { + { + .base = S3C64XX_GPH_BASE + 0x4, + .chip = { + .base = S3C64XX_GPH(0), + .ngpio = S3C64XX_GPIO_H_NR, + .label = "GPH", + }, + }, { + .base = S3C64XX_GPK_BASE + 0x4, + .config = &samsung_gpio_cfgs[0], + .chip = { + .base = S3C64XX_GPK(0), + .ngpio = S3C64XX_GPIO_K_NR, + .label = "GPK", + }, + }, { + .base = S3C64XX_GPL_BASE + 0x4, + .config = &samsung_gpio_cfgs[1], + .chip = { + .base = S3C64XX_GPL(0), + .ngpio = S3C64XX_GPIO_L_NR, + .label = "GPL", + .to_irq = s3c64xx_gpiolib_lbank_to_irq, + }, + }, +}; + +static struct samsung_gpio_chip s3c64xx_gpios_2bit[] = { + { + .base = S3C64XX_GPF_BASE, + .config = &samsung_gpio_cfgs[6], + .chip = { + .base = S3C64XX_GPF(0), + .ngpio = S3C64XX_GPIO_F_NR, + .label = "GPF", + }, + }, { + .config = &samsung_gpio_cfgs[7], + .chip = { + .base = S3C64XX_GPI(0), + .ngpio = S3C64XX_GPIO_I_NR, + .label = "GPI", + }, + }, { + .config = &samsung_gpio_cfgs[7], + .chip = { + .base = S3C64XX_GPJ(0), + .ngpio = S3C64XX_GPIO_J_NR, + .label = "GPJ", + }, + }, { + .config = &samsung_gpio_cfgs[6], + .chip = { + .base = S3C64XX_GPO(0), + .ngpio = S3C64XX_GPIO_O_NR, + .label = "GPO", + }, + }, { + .config = &samsung_gpio_cfgs[6], + .chip = { + .base = S3C64XX_GPP(0), + .ngpio = S3C64XX_GPIO_P_NR, + .label = "GPP", + }, + }, { + .config = &samsung_gpio_cfgs[6], + .chip = { + .base = S3C64XX_GPQ(0), + .ngpio = S3C64XX_GPIO_Q_NR, + .label = "GPQ", + }, + }, { + .base = S3C64XX_GPN_BASE, + .irq_base = IRQ_EINT(0), + .config = &samsung_gpio_cfgs[5], + .chip = { + .base = S3C64XX_GPN(0), + .ngpio = S3C64XX_GPIO_N_NR, + .label = "GPN", + .to_irq = samsung_gpiolib_to_irq, + }, + }, +}; + +/* TODO: cleanup soc_is_* */ +static __init int samsung_gpiolib_init(void) +{ + /* + * Currently there are two drivers that can provide GPIO support for + * Samsung SoCs. For device tree enabled platforms, the new + * pinctrl-samsung driver is used, providing both GPIO and pin control + * interfaces. For legacy (non-DT) platforms this driver is used. + */ + if (of_have_populated_dt()) + return 0; + + if (soc_is_s3c64xx()) { + samsung_gpiolib_set_cfg(samsung_gpio_cfgs, + ARRAY_SIZE(samsung_gpio_cfgs)); + samsung_gpiolib_add_2bit_chips(s3c64xx_gpios_2bit, + ARRAY_SIZE(s3c64xx_gpios_2bit), + S3C64XX_VA_GPIO + 0xE0, 0x20); + samsung_gpiolib_add_4bit_chips(s3c64xx_gpios_4bit, + ARRAY_SIZE(s3c64xx_gpios_4bit), + S3C64XX_VA_GPIO); + samsung_gpiolib_add_4bit2_chips(s3c64xx_gpios_4bit2, + ARRAY_SIZE(s3c64xx_gpios_4bit2)); + } + + return 0; +} +core_initcall(samsung_gpiolib_init); + +int s3c_gpio_cfgpin(unsigned int pin, unsigned int config) +{ + struct samsung_gpio_chip *chip = samsung_gpiolib_getchip(pin); + unsigned long flags; + int offset; + int ret; + + if (!chip) + return -EINVAL; + + offset = pin - chip->chip.base; + + samsung_gpio_lock(chip, flags); + ret = samsung_gpio_do_setcfg(chip, offset, config); + samsung_gpio_unlock(chip, flags); + + return ret; +} +EXPORT_SYMBOL(s3c_gpio_cfgpin); + +int s3c_gpio_cfgpin_range(unsigned int start, unsigned int nr, + unsigned int cfg) +{ + int ret; + + for (; nr > 0; nr--, start++) { + ret = s3c_gpio_cfgpin(start, cfg); + if (ret != 0) + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(s3c_gpio_cfgpin_range); + +int s3c_gpio_cfgall_range(unsigned int start, unsigned int nr, + unsigned int cfg, samsung_gpio_pull_t pull) +{ + int ret; + + for (; nr > 0; nr--, start++) { + s3c_gpio_setpull(start, pull); + ret = s3c_gpio_cfgpin(start, cfg); + if (ret != 0) + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(s3c_gpio_cfgall_range); + +int s3c_gpio_setpull(unsigned int pin, samsung_gpio_pull_t pull) +{ + struct samsung_gpio_chip *chip = samsung_gpiolib_getchip(pin); + unsigned long flags; + int offset, ret; + + if (!chip) + return -EINVAL; + + offset = pin - chip->chip.base; + + samsung_gpio_lock(chip, flags); + ret = samsung_gpio_do_setpull(chip, offset, pull); + samsung_gpio_unlock(chip, flags); + + return ret; +} +EXPORT_SYMBOL(s3c_gpio_setpull); -- cgit v1.2.3