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/input/touchscreen/bcm_iproc_tsc.c | 522 ++++++++++++++++++++++++++++++ 1 file changed, 522 insertions(+) create mode 100644 drivers/input/touchscreen/bcm_iproc_tsc.c (limited to 'drivers/input/touchscreen/bcm_iproc_tsc.c') diff --git a/drivers/input/touchscreen/bcm_iproc_tsc.c b/drivers/input/touchscreen/bcm_iproc_tsc.c new file mode 100644 index 000000000..35e2fe991 --- /dev/null +++ b/drivers/input/touchscreen/bcm_iproc_tsc.c @@ -0,0 +1,522 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* +* Copyright (C) 2015 Broadcom Corporation +* +*/ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define IPROC_TS_NAME "iproc-ts" + +#define PEN_DOWN_STATUS 1 +#define PEN_UP_STATUS 0 + +#define X_MIN 0 +#define Y_MIN 0 +#define X_MAX 0xFFF +#define Y_MAX 0xFFF + +/* Value given by controller for invalid coordinate. */ +#define INVALID_COORD 0xFFFFFFFF + +/* Register offsets */ +#define REGCTL1 0x00 +#define REGCTL2 0x04 +#define INTERRUPT_THRES 0x08 +#define INTERRUPT_MASK 0x0c + +#define INTERRUPT_STATUS 0x10 +#define CONTROLLER_STATUS 0x14 +#define FIFO_DATA 0x18 +#define FIFO_DATA_X_Y_MASK 0xFFFF +#define ANALOG_CONTROL 0x1c + +#define AUX_DATA 0x20 +#define DEBOUNCE_CNTR_STAT 0x24 +#define SCAN_CNTR_STAT 0x28 +#define REM_CNTR_STAT 0x2c + +#define SETTLING_TIMER_STAT 0x30 +#define SPARE_REG 0x34 +#define SOFT_BYPASS_CONTROL 0x38 +#define SOFT_BYPASS_DATA 0x3c + + +/* Bit values for INTERRUPT_MASK and INTERRUPT_STATUS regs */ +#define TS_PEN_INTR_MASK BIT(0) +#define TS_FIFO_INTR_MASK BIT(2) + +/* Bit values for CONTROLLER_STATUS reg1 */ +#define TS_PEN_DOWN BIT(0) + +/* Shift values for control reg1 */ +#define SCANNING_PERIOD_SHIFT 24 +#define DEBOUNCE_TIMEOUT_SHIFT 16 +#define SETTLING_TIMEOUT_SHIFT 8 +#define TOUCH_TIMEOUT_SHIFT 0 + +/* Shift values for coordinates from fifo */ +#define X_COORD_SHIFT 0 +#define Y_COORD_SHIFT 16 + +/* Bit values for REGCTL2 */ +#define TS_CONTROLLER_EN_BIT BIT(16) +#define TS_CONTROLLER_AVGDATA_SHIFT 8 +#define TS_CONTROLLER_AVGDATA_MASK (0x7 << TS_CONTROLLER_AVGDATA_SHIFT) +#define TS_CONTROLLER_PWR_LDO BIT(5) +#define TS_CONTROLLER_PWR_ADC BIT(4) +#define TS_CONTROLLER_PWR_BGP BIT(3) +#define TS_CONTROLLER_PWR_TS BIT(2) +#define TS_WIRE_MODE_BIT BIT(1) + +#define dbg_reg(dev, priv, reg) \ +do { \ + u32 val; \ + regmap_read(priv->regmap, reg, &val); \ + dev_dbg(dev, "%20s= 0x%08x\n", #reg, val); \ +} while (0) + +struct tsc_param { + /* Each step is 1024 us. Valid 1-256 */ + u32 scanning_period; + + /* Each step is 512 us. Valid 0-255 */ + u32 debounce_timeout; + + /* + * The settling duration (in ms) is the amount of time the tsc + * waits to allow the voltage to settle after turning on the + * drivers in detection mode. Valid values: 0-11 + * 0 = 0.008 ms + * 1 = 0.01 ms + * 2 = 0.02 ms + * 3 = 0.04 ms + * 4 = 0.08 ms + * 5 = 0.16 ms + * 6 = 0.32 ms + * 7 = 0.64 ms + * 8 = 1.28 ms + * 9 = 2.56 ms + * 10 = 5.12 ms + * 11 = 10.24 ms + */ + u32 settling_timeout; + + /* touch timeout in sample counts */ + u32 touch_timeout; + + /* + * Number of data samples which are averaged before a final data point + * is placed into the FIFO + */ + u32 average_data; + + /* FIFO threshold */ + u32 fifo_threshold; + + /* Optional standard touchscreen properties. */ + u32 max_x; + u32 max_y; + u32 fuzz_x; + u32 fuzz_y; + bool invert_x; + bool invert_y; +}; + +struct iproc_ts_priv { + struct platform_device *pdev; + struct input_dev *idev; + + struct regmap *regmap; + struct clk *tsc_clk; + + int pen_status; + struct tsc_param cfg_params; +}; + +/* + * Set default values the same as hardware reset values + * except for fifo_threshold with is set to 1. + */ +static const struct tsc_param iproc_default_config = { + .scanning_period = 0x5, /* 1 to 256 */ + .debounce_timeout = 0x28, /* 0 to 255 */ + .settling_timeout = 0x7, /* 0 to 11 */ + .touch_timeout = 0xa, /* 0 to 255 */ + .average_data = 5, /* entry 5 = 32 pts */ + .fifo_threshold = 1, /* 0 to 31 */ + .max_x = X_MAX, + .max_y = Y_MAX, +}; + +static void ts_reg_dump(struct iproc_ts_priv *priv) +{ + struct device *dev = &priv->pdev->dev; + + dbg_reg(dev, priv, REGCTL1); + dbg_reg(dev, priv, REGCTL2); + dbg_reg(dev, priv, INTERRUPT_THRES); + dbg_reg(dev, priv, INTERRUPT_MASK); + dbg_reg(dev, priv, INTERRUPT_STATUS); + dbg_reg(dev, priv, CONTROLLER_STATUS); + dbg_reg(dev, priv, FIFO_DATA); + dbg_reg(dev, priv, ANALOG_CONTROL); + dbg_reg(dev, priv, AUX_DATA); + dbg_reg(dev, priv, DEBOUNCE_CNTR_STAT); + dbg_reg(dev, priv, SCAN_CNTR_STAT); + dbg_reg(dev, priv, REM_CNTR_STAT); + dbg_reg(dev, priv, SETTLING_TIMER_STAT); + dbg_reg(dev, priv, SPARE_REG); + dbg_reg(dev, priv, SOFT_BYPASS_CONTROL); + dbg_reg(dev, priv, SOFT_BYPASS_DATA); +} + +static irqreturn_t iproc_touchscreen_interrupt(int irq, void *data) +{ + struct platform_device *pdev = data; + struct iproc_ts_priv *priv = platform_get_drvdata(pdev); + u32 intr_status; + u32 raw_coordinate; + u16 x; + u16 y; + int i; + bool needs_sync = false; + + regmap_read(priv->regmap, INTERRUPT_STATUS, &intr_status); + intr_status &= TS_PEN_INTR_MASK | TS_FIFO_INTR_MASK; + if (intr_status == 0) + return IRQ_NONE; + + /* Clear all interrupt status bits, write-1-clear */ + regmap_write(priv->regmap, INTERRUPT_STATUS, intr_status); + /* Pen up/down */ + if (intr_status & TS_PEN_INTR_MASK) { + regmap_read(priv->regmap, CONTROLLER_STATUS, &priv->pen_status); + if (priv->pen_status & TS_PEN_DOWN) + priv->pen_status = PEN_DOWN_STATUS; + else + priv->pen_status = PEN_UP_STATUS; + + input_report_key(priv->idev, BTN_TOUCH, priv->pen_status); + needs_sync = true; + + dev_dbg(&priv->pdev->dev, + "pen up-down (%d)\n", priv->pen_status); + } + + /* coordinates in FIFO exceed the theshold */ + if (intr_status & TS_FIFO_INTR_MASK) { + for (i = 0; i < priv->cfg_params.fifo_threshold; i++) { + regmap_read(priv->regmap, FIFO_DATA, &raw_coordinate); + if (raw_coordinate == INVALID_COORD) + continue; + + /* + * The x and y coordinate are 16 bits each + * with the x in the lower 16 bits and y in the + * upper 16 bits. + */ + x = (raw_coordinate >> X_COORD_SHIFT) & + FIFO_DATA_X_Y_MASK; + y = (raw_coordinate >> Y_COORD_SHIFT) & + FIFO_DATA_X_Y_MASK; + + /* We only want to retain the 12 msb of the 16 */ + x = (x >> 4) & 0x0FFF; + y = (y >> 4) & 0x0FFF; + + /* Adjust x y according to LCD tsc mount angle. */ + if (priv->cfg_params.invert_x) + x = priv->cfg_params.max_x - x; + + if (priv->cfg_params.invert_y) + y = priv->cfg_params.max_y - y; + + input_report_abs(priv->idev, ABS_X, x); + input_report_abs(priv->idev, ABS_Y, y); + needs_sync = true; + + dev_dbg(&priv->pdev->dev, "xy (0x%x 0x%x)\n", x, y); + } + } + + if (needs_sync) + input_sync(priv->idev); + + return IRQ_HANDLED; +} + +static int iproc_ts_start(struct input_dev *idev) +{ + u32 val; + u32 mask; + int error; + struct iproc_ts_priv *priv = input_get_drvdata(idev); + + /* Enable clock */ + error = clk_prepare_enable(priv->tsc_clk); + if (error) { + dev_err(&priv->pdev->dev, "%s clk_prepare_enable failed %d\n", + __func__, error); + return error; + } + + /* + * Interrupt is generated when: + * FIFO reaches the int_th value, and pen event(up/down) + */ + val = TS_PEN_INTR_MASK | TS_FIFO_INTR_MASK; + regmap_update_bits(priv->regmap, INTERRUPT_MASK, val, val); + + val = priv->cfg_params.fifo_threshold; + regmap_write(priv->regmap, INTERRUPT_THRES, val); + + /* Initialize control reg1 */ + val = 0; + val |= priv->cfg_params.scanning_period << SCANNING_PERIOD_SHIFT; + val |= priv->cfg_params.debounce_timeout << DEBOUNCE_TIMEOUT_SHIFT; + val |= priv->cfg_params.settling_timeout << SETTLING_TIMEOUT_SHIFT; + val |= priv->cfg_params.touch_timeout << TOUCH_TIMEOUT_SHIFT; + regmap_write(priv->regmap, REGCTL1, val); + + /* Try to clear all interrupt status */ + val = TS_FIFO_INTR_MASK | TS_PEN_INTR_MASK; + regmap_update_bits(priv->regmap, INTERRUPT_STATUS, val, val); + + /* Initialize control reg2 */ + val = TS_CONTROLLER_EN_BIT | TS_WIRE_MODE_BIT; + val |= priv->cfg_params.average_data << TS_CONTROLLER_AVGDATA_SHIFT; + + mask = (TS_CONTROLLER_AVGDATA_MASK); + mask |= (TS_CONTROLLER_PWR_LDO | /* PWR up LDO */ + TS_CONTROLLER_PWR_ADC | /* PWR up ADC */ + TS_CONTROLLER_PWR_BGP | /* PWR up BGP */ + TS_CONTROLLER_PWR_TS); /* PWR up TS */ + mask |= val; + regmap_update_bits(priv->regmap, REGCTL2, mask, val); + + ts_reg_dump(priv); + + return 0; +} + +static void iproc_ts_stop(struct input_dev *dev) +{ + u32 val; + struct iproc_ts_priv *priv = input_get_drvdata(dev); + + /* + * Disable FIFO int_th and pen event(up/down)Interrupts only + * as the interrupt mask register is shared between ADC, TS and + * flextimer. + */ + val = TS_PEN_INTR_MASK | TS_FIFO_INTR_MASK; + regmap_update_bits(priv->regmap, INTERRUPT_MASK, val, 0); + + /* Only power down touch screen controller */ + val = TS_CONTROLLER_PWR_TS; + regmap_update_bits(priv->regmap, REGCTL2, val, val); + + clk_disable(priv->tsc_clk); +} + +static int iproc_get_tsc_config(struct device *dev, struct iproc_ts_priv *priv) +{ + struct device_node *np = dev->of_node; + u32 val; + + priv->cfg_params = iproc_default_config; + + if (!np) + return 0; + + if (of_property_read_u32(np, "scanning_period", &val) >= 0) { + if (val < 1 || val > 256) { + dev_err(dev, "scanning_period (%u) must be [1-256]\n", + val); + return -EINVAL; + } + priv->cfg_params.scanning_period = val; + } + + if (of_property_read_u32(np, "debounce_timeout", &val) >= 0) { + if (val > 255) { + dev_err(dev, "debounce_timeout (%u) must be [0-255]\n", + val); + return -EINVAL; + } + priv->cfg_params.debounce_timeout = val; + } + + if (of_property_read_u32(np, "settling_timeout", &val) >= 0) { + if (val > 11) { + dev_err(dev, "settling_timeout (%u) must be [0-11]\n", + val); + return -EINVAL; + } + priv->cfg_params.settling_timeout = val; + } + + if (of_property_read_u32(np, "touch_timeout", &val) >= 0) { + if (val > 255) { + dev_err(dev, "touch_timeout (%u) must be [0-255]\n", + val); + return -EINVAL; + } + priv->cfg_params.touch_timeout = val; + } + + if (of_property_read_u32(np, "average_data", &val) >= 0) { + if (val > 8) { + dev_err(dev, "average_data (%u) must be [0-8]\n", val); + return -EINVAL; + } + priv->cfg_params.average_data = val; + } + + if (of_property_read_u32(np, "fifo_threshold", &val) >= 0) { + if (val > 31) { + dev_err(dev, "fifo_threshold (%u)) must be [0-31]\n", + val); + return -EINVAL; + } + priv->cfg_params.fifo_threshold = val; + } + + /* Parse optional properties. */ + of_property_read_u32(np, "touchscreen-size-x", &priv->cfg_params.max_x); + of_property_read_u32(np, "touchscreen-size-y", &priv->cfg_params.max_y); + + of_property_read_u32(np, "touchscreen-fuzz-x", + &priv->cfg_params.fuzz_x); + of_property_read_u32(np, "touchscreen-fuzz-y", + &priv->cfg_params.fuzz_y); + + priv->cfg_params.invert_x = + of_property_read_bool(np, "touchscreen-inverted-x"); + priv->cfg_params.invert_y = + of_property_read_bool(np, "touchscreen-inverted-y"); + + return 0; +} + +static int iproc_ts_probe(struct platform_device *pdev) +{ + struct iproc_ts_priv *priv; + struct input_dev *idev; + int irq; + int error; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + /* touchscreen controller memory mapped regs via syscon*/ + priv->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, + "ts_syscon"); + if (IS_ERR(priv->regmap)) { + error = PTR_ERR(priv->regmap); + dev_err(&pdev->dev, "unable to map I/O memory:%d\n", error); + return error; + } + + priv->tsc_clk = devm_clk_get(&pdev->dev, "tsc_clk"); + if (IS_ERR(priv->tsc_clk)) { + error = PTR_ERR(priv->tsc_clk); + dev_err(&pdev->dev, + "failed getting clock tsc_clk: %d\n", error); + return error; + } + + priv->pdev = pdev; + error = iproc_get_tsc_config(&pdev->dev, priv); + if (error) { + dev_err(&pdev->dev, "get_tsc_config failed: %d\n", error); + return error; + } + + idev = devm_input_allocate_device(&pdev->dev); + if (!idev) { + dev_err(&pdev->dev, "failed to allocate input device\n"); + return -ENOMEM; + } + + priv->idev = idev; + priv->pen_status = PEN_UP_STATUS; + + /* Set input device info */ + idev->name = IPROC_TS_NAME; + idev->dev.parent = &pdev->dev; + + idev->id.bustype = BUS_HOST; + idev->id.vendor = SERIO_UNKNOWN; + idev->id.product = 0; + idev->id.version = 0; + + idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); + __set_bit(BTN_TOUCH, idev->keybit); + + input_set_abs_params(idev, ABS_X, X_MIN, priv->cfg_params.max_x, + priv->cfg_params.fuzz_x, 0); + input_set_abs_params(idev, ABS_Y, Y_MIN, priv->cfg_params.max_y, + priv->cfg_params.fuzz_y, 0); + + idev->open = iproc_ts_start; + idev->close = iproc_ts_stop; + + input_set_drvdata(idev, priv); + platform_set_drvdata(pdev, priv); + + /* get interrupt */ + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + error = devm_request_irq(&pdev->dev, irq, + iproc_touchscreen_interrupt, + IRQF_SHARED, IPROC_TS_NAME, pdev); + if (error) + return error; + + error = input_register_device(priv->idev); + if (error) { + dev_err(&pdev->dev, + "failed to register input device: %d\n", error); + return error; + } + + return 0; +} + +static const struct of_device_id iproc_ts_of_match[] = { + {.compatible = "brcm,iproc-touchscreen", }, + { }, +}; +MODULE_DEVICE_TABLE(of, iproc_ts_of_match); + +static struct platform_driver iproc_ts_driver = { + .probe = iproc_ts_probe, + .driver = { + .name = IPROC_TS_NAME, + .of_match_table = of_match_ptr(iproc_ts_of_match), + }, +}; + +module_platform_driver(iproc_ts_driver); + +MODULE_DESCRIPTION("IPROC Touchscreen driver"); +MODULE_AUTHOR("Broadcom"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3