From patchwork Mon Oct 10 16:18:12 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Caleb Connolly X-Patchwork-Id: 614440 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 86148C43219 for ; Mon, 10 Oct 2022 16:18:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229623AbiJJQSd (ORCPT ); Mon, 10 Oct 2022 12:18:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44054 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229838AbiJJQSa (ORCPT ); Mon, 10 Oct 2022 12:18:30 -0400 Received: from mail-0301.mail-europe.com (mail-0301.mail-europe.com [188.165.51.139]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0343F74E04; Mon, 10 Oct 2022 09:18:20 -0700 (PDT) Date: Mon, 10 Oct 2022 16:18:12 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=connolly.tech; s=protonmail; t=1665418695; x=1665677895; bh=37U2KQIzutjIDYR/q24e+F5cwQxJPW/uMG0055MRTfk=; h=Date:To:From:Cc:Subject:Message-ID:In-Reply-To:References: Feedback-ID:From:To:Cc:Date:Subject:Reply-To:Feedback-ID: Message-ID; b=jIWRzkZHSlOlg/mjdid+TNcMnxh3Vuw+1RI/ORkkTei3Fuw5DLr+lN0xUu1hTygaX odsePbVMaVtsRZUqZOzd5s/NDzZ8eZhePBWwKac7umqZBCJOCuMq4OTCnYBBsSk7Kd U0JXDKjREvX3qIsygEl68ohDj+NOme8X4W7HhxKw= To: caleb@connolly.tech From: Caleb Connolly Cc: Andy Gross , Bjorn Andersson , devicetree@vger.kernel.org, Dmitry Torokhov , Jeff LaBundy , Konrad Dybcio , Krzysztof Kozlowski , linux-arm-msm@vger.kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, Nathan Chancellor , Nick Desaulniers , Rob Herring , Tom Rix Subject: [PATCH v5 1/2] dt-bindings: input: document Qualcomm PMI8998 haptics driver Message-ID: <20221010161727.1298112-2-caleb@connolly.tech> In-Reply-To: <20221010161727.1298112-1-caleb@connolly.tech> References: <20221010161727.1298112-1-caleb@connolly.tech> Feedback-ID: 10753939:user:proton MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Add bindings for qcom PMIC PMI8998 haptics driver. Signed-off-by: Caleb Connolly --- .../bindings/input/qcom,pmi8998-haptics.yaml | 72 +++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/qcom,pmi8998-haptics.yaml -- 2.38.0 diff --git a/Documentation/devicetree/bindings/input/qcom,pmi8998-haptics.yaml b/Documentation/devicetree/bindings/input/qcom,pmi8998-haptics.yaml new file mode 100644 index 000000000000..cdffe893c77a --- /dev/null +++ b/Documentation/devicetree/bindings/input/qcom,pmi8998-haptics.yaml @@ -0,0 +1,72 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +# Copyright 2020 Unisoc Inc. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/input/qcom,spmi-haptics.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Qualcomm PMI8998/PM660 Haptics + +maintainers: + - Caleb Connolly + +description: | + Qualcomm SPMI haptics is a peripheral on some QTI PMICs. It supports linear resonant + actuators and eccentric rotating mass type haptics commonly found in mobile devices. + It supports multiple sources of wave data such as an internal buffer, direct play + (from kernel or userspace) as well as an audio output mode. + +properties: + compatible: + items: + - enum: + - qcom,pmi8998-haptics + - qcom,pm660-charger + - qcom,pmi8996-haptics + - qcom,pmi8941-haptics + + reg: + maxItems: 1 + + interrupts: + maxItems: 2 + + interrupt-names: + items: + - const: short + - const: play + + qcom,wave-play-rate-us: + description: | + Wave sample durection in microseconds, 1/f where f + is the resonant frequency of the actuator. + $ref: /schemas/types.yaml#/definitions/uint32 + minimum: 0 + maximum: 20475 + +required: + - compatible + - reg + - interrupts + - qcom,wave-play-rate-us + +additionalProperties: false + +examples: + - | + #include + + spmi { + #address-cells = <1>; + #size-cells = <0>; + pmi8998_haptics: haptics@c000 { + compatible = "qcom,pmi8998-haptics"; + reg = <0xc000>; + + interrupts = <0x3 0xc0 0x0 IRQ_TYPE_EDGE_BOTH>, + <0x3 0xc0 0x1 IRQ_TYPE_EDGE_BOTH>; + interrupt-names = "short", "play"; + + qcom,wave-play-rate-us = <4255>; + }; + }; From patchwork Mon Oct 10 16:18:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Caleb Connolly X-Patchwork-Id: 613998 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 27B2CC4332F for ; Mon, 10 Oct 2022 16:18:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229700AbiJJQSs (ORCPT ); Mon, 10 Oct 2022 12:18:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44328 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229953AbiJJQSl (ORCPT ); Mon, 10 Oct 2022 12:18:41 -0400 Received: from mail-0301.mail-europe.com (mail-0301.mail-europe.com [188.165.51.139]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8581072EC4 for ; Mon, 10 Oct 2022 09:18:34 -0700 (PDT) Date: Mon, 10 Oct 2022 16:18:25 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=connolly.tech; s=protonmail; t=1665418710; x=1665677910; bh=QUBvfLf5/ZmxmXVHIOzXGKhSL4wLDsnRHwe2CVD15XI=; h=Date:To:From:Cc:Subject:Message-ID:In-Reply-To:References: Feedback-ID:From:To:Cc:Date:Subject:Reply-To:Feedback-ID: Message-ID; b=ZvDwxUNGzYPeSrC8Lsx1Gi1FU0Far9/X9nhkaxT1FFaLy48ihRNwEuiZz6JQXaFXh tMc0x+o30U+S2+o+dtylWAjA0uQoptWI5s5Ml+chgSN2nWk0bm38pnzadm1nfCwIle VivCi4qc/keFVX1fiBTwBZ13VB//62PF84XsJ+zw= To: caleb@connolly.tech From: Caleb Connolly Cc: Andy Gross , Bjorn Andersson , devicetree@vger.kernel.org, Dmitry Torokhov , Jeff LaBundy , Konrad Dybcio , Krzysztof Kozlowski , linux-arm-msm@vger.kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, Nathan Chancellor , Nick Desaulniers , Rob Herring , Tom Rix Subject: [PATCH v5 2/2] input: add Qualcomm SPMI haptics driver Message-ID: <20221010161727.1298112-3-caleb@connolly.tech> In-Reply-To: <20221010161727.1298112-1-caleb@connolly.tech> References: <20221010161727.1298112-1-caleb@connolly.tech> Feedback-ID: 10753939:user:proton MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Add support for the haptics found in pmi8998 and related PMICs. Based on the ff-memless interface. Currently this driver provides a partial implementation of hardware features. This driver only supports LRAs (Linear Resonant Actuators) in the "buffer" mode with a single wave pattern. Signed-off-by: Caleb Connolly --- drivers/input/misc/Kconfig | 15 + drivers/input/misc/Makefile | 1 + drivers/input/misc/qcom-pmi8998-haptics.c | 690 ++++++++++++++++++++++ 3 files changed, 706 insertions(+) create mode 100644 drivers/input/misc/qcom-pmi8998-haptics.c -- 2.38.0 diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index a18ab7358d8f..c3b59ea23144 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -186,6 +186,21 @@ config INPUT_PMIC8XXX_PWRKEY To compile this driver as a module, choose M here: the module will be called pmic8xxx-pwrkey. +config INPUT_QCOM_PMI8998_HAPTICS + tristate "Qualcomm SPMI HAPTICS" + depends on ARCH_QCOM + depends on MFD_PM8XXX || MFD_SPMI_PMIC + select INPUT_FF_MEMLESS + help + This option enables support for the haptics found in pmi8998 and + related PMICs. Based on the ff-memless interface. + + This driver is for hardware too new for the INPUT_PM8XXX_VIBRATOR + driver. + + To compile this driver as module, choose M here: the + module will be called qcom_pmi8998_haptics. + config INPUT_SPARCSPKR tristate "SPARC Speaker support" depends on PCI && SPARC64 diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 28dfc444f0a9..039d0a97f2f4 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -65,6 +65,7 @@ obj-$(CONFIG_INPUT_PMIC8XXX_PWRKEY) += pmic8xxx-pwrkey.o obj-$(CONFIG_INPUT_POWERMATE) += powermate.o obj-$(CONFIG_INPUT_PWM_BEEPER) += pwm-beeper.o obj-$(CONFIG_INPUT_PWM_VIBRA) += pwm-vibra.o +obj-$(CONFIG_INPUT_QCOM_PMI8998_HAPTICS)+= qcom-pmi8998-haptics.o obj-$(CONFIG_INPUT_RAVE_SP_PWRBUTTON) += rave-sp-pwrbutton.o obj-$(CONFIG_INPUT_RB532_BUTTON) += rb532_button.o obj-$(CONFIG_INPUT_REGULATOR_HAPTIC) += regulator-haptic.o diff --git a/drivers/input/misc/qcom-pmi8998-haptics.c b/drivers/input/misc/qcom-pmi8998-haptics.c new file mode 100644 index 000000000000..4aab2c5fe9db --- /dev/null +++ b/drivers/input/misc/qcom-pmi8998-haptics.c @@ -0,0 +1,690 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2022, Caleb Connolly + * Qualcomm QPMI haptics driver for pmi8998 and related PMICs. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +// clang-format off +#define HAP_STATUS_1_REG 0x0A +#define HAP_BUSY_BIT BIT(1) +#define SC_FLAG_BIT BIT(3) +#define AUTO_RES_ERROR_BIT BIT(4) + +#define HAP_LRA_AUTO_RES_LO_REG 0x0B +#define HAP_LRA_AUTO_RES_HI_REG 0x0C + +#define HAP_EN_CTL_REG 0x46 +#define HAP_EN_BIT BIT(7) + +#define HAP_EN_CTL2_REG 0x48 +#define BRAKE_EN_BIT BIT(0) + +#define HAP_AUTO_RES_CTRL_REG 0x4B +#define AUTO_RES_EN_BIT BIT(7) +#define AUTO_RES_ERR_RECOVERY_BIT BIT(3) +#define AUTO_RES_EN_FLAG_BIT BIT(0) + +#define HAP_CFG1_REG 0x4C +#define HAP_ACT_TYPE_MASK BIT(0) + +#define HAP_CFG2_REG 0x4D +#define HAP_LRA_RES_TYPE_MASK BIT(0) + +#define HAP_SEL_REG 0x4E +#define HAP_WF_SOURCE_MASK GENMASK(5, 4) +#define HAP_WF_SOURCE_SHIFT 4 + +#define HAP_LRA_AUTO_RES_REG 0x4F +#define LRA_AUTO_RES_MODE_MASK GENMASK(6, 4) +#define LRA_AUTO_RES_MODE_SHIFT 4 +#define LRA_HIGH_Z_MASK GENMASK(3, 2) +#define LRA_HIGH_Z_SHIFT 2 +#define LRA_RES_CAL_MASK GENMASK(1, 0) +#define HAP_RES_CAL_PERIOD_MIN 4 +#define HAP_RES_CAL_PERIOD_MAX 32 + +#define HAP_VMAX_CFG_REG 0x51 +#define HAP_VMAX_OVD_BIT BIT(6) +#define HAP_VMAX_MASK GENMASK(5, 1) +#define HAP_VMAX_SHIFT 1 + +#define HAP_ILIM_CFG_REG 0x52 +#define HAP_ILIM_SEL_MASK BIT(0) +#define HAP_ILIM_400_MA 0 +#define HAP_ILIM_800_MA 1 + +#define HAP_SC_DEB_REG 0x53 +#define HAP_SC_DEB_MASK GENMASK(2, 0) +#define HAP_SC_DEB_CYCLES_MIN 0 +#define HAP_DEF_SC_DEB_CYCLES 8 +#define HAP_SC_DEB_CYCLES_MAX 32 + +#define HAP_RATE_CFG1_REG 0x54 +#define HAP_RATE_CFG1_MASK GENMASK(7, 0) +#define HAP_RATE_CFG2_SHIFT 8 // As CFG2 is the most significant byte + +#define HAP_RATE_CFG2_REG 0x55 +#define HAP_RATE_CFG2_MASK GENMASK(3, 0) + +#define HAP_SC_CLR_REG 0x59 +#define SC_CLR_BIT BIT(0) + +#define HAP_BRAKE_REG 0x5C +#define HAP_BRAKE_PAT_MASK 0x3 + +#define HAP_WF_REPEAT_REG 0x5E +#define WF_REPEAT_MASK GENMASK(6, 4) +#define WF_REPEAT_SHIFT 4 +#define WF_REPEAT_MIN 1 +#define WF_REPEAT_MAX 128 +#define WF_S_REPEAT_MASK GENMASK(1, 0) +#define WF_S_REPEAT_MIN 1 +#define WF_S_REPEAT_MAX 8 + +#define HAP_WF_S1_REG 0x60 +#define HAP_WF_SIGN_BIT BIT(7) +#define HAP_WF_OVD_BIT BIT(6) +#define HAP_WF_SAMP_MAX GENMASK(5, 1) +#define HAP_WF_SAMPLE_LEN 8 + +#define HAP_PLAY_REG 0x70 +#define HAP_PLAY_BIT BIT(7) +#define HAP_PAUSE_BIT BIT(0) + +#define HAP_SEC_ACCESS_REG 0xD0 +#define HAP_SEC_ACCESS_UNLOCK 0xA5 + +#define HAP_TEST2_REG 0xE3 + + +#define HAP_VMAX_MIN_MV 116 +#define HAP_VMAX_MAX_MV 3596 +#define HAP_VMAX_MAX_MV_STRONG 3596 + +#define HAP_WAVE_PLAY_RATE_MIN_US 0 +#define HAP_WAVE_PLAY_RATE_MAX_US 20475 +#define HAP_WAVE_PLAY_TIME_MAX_MS 15000 + +#define AUTO_RES_ERR_POLL_TIME_NS (20 * NSEC_PER_MSEC) +#define HAPTICS_BACK_EMF_DELAY_US 20000 + +#define HAP_BRAKE_PAT_LEN 4 +#define HAP_WAVE_SAMP_LEN 8 +#define NUM_WF_SET 4 +#define HAP_WAVE_SAMP_SET_LEN (HAP_WAVE_SAMP_LEN * NUM_WF_SET) +#define HAP_RATE_CFG_STEP_US 5 + +#define SC_MAX_COUNT 5 +#define SC_COUNT_RST_DELAY_US 1000000 + +// Actuator types +#define HAP_TYPE_LRA 0 +#define HAP_TYPE_ERM 1 + +// LRA Wave type +#define HAP_WAVE_SINE 0 +#define HAP_WAVE_SQUARE 1 + +// Play modes +#define HAP_PLAY_DIRECT 0 +#define HAP_PLAY_BUFFER 1 +#define HAP_PLAY_AUDIO 2 +#define HAP_PLAY_PWM 3 + +#define HAP_PLAY_MAX HAP_PLAY_PWM + +// Auto resonance type +#define HAP_AUTO_RES_NONE 0 +#define HAP_AUTO_RES_ZXD 1 +#define HAP_AUTO_RES_QWD 2 +#define HAP_AUTO_RES_MAX_QWD 3 +#define HAP_AUTO_RES_ZXD_EOP 4 +// clang-format on + +static const uint8_t default_brake_pattern[] = { + 0x3, 0x3, 0x3, 0x3, 0x3, +}; + +static const uint8_t wave_sample_pattern[] = { + 0x7e, 0x7e, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, +}; + +/** + * struct spmi_haptics - struct for spmi haptics data. + * + * @dev: Our device parent. + * @regmap: Register map for the hardware block. + * @input: The input device used to receive events. + * @work: Work struct to play effects. + * @base: Base address of the regmap. + * @play_irq: Fired to load the next wave pattern. + * @sc_irq: Short circuit irq. + * @last_sc_time: Time since the short circuit IRQ last fired. + * @sc_count: Number of times the short circuit IRQ has fired in this interval. + * @actuator_type: The type of actuator in use. + * @wave_shape: The shape of the waves to use (sine or square). + * @play_mode: The play mode to use (direct, buffer, pwm, audio). + * @vmax: Max voltage to use when playing. + * @current_limit: The current limit for this hardware (400mA or 800mA). + * @play_wave_rate: The wave rate to use for this hardware. + * @play_lock: Lock to be held when updating the hardware state. + */ +struct spmi_haptics { + struct device *dev; + struct regmap *regmap; + struct input_dev *input; + struct work_struct work; + uint32_t base; + + int play_irq; + int sc_irq; + ktime_t last_sc_time; + uint8_t sc_count; + + uint8_t actuator_type; + uint8_t wave_shape; + uint8_t play_mode; + uint32_t vmax; + uint32_t current_limit; + uint32_t play_wave_rate; + struct mutex play_lock; +}; + +static int haptics_write_vmax(struct spmi_haptics *haptics) +{ + uint8_t val = 0; + uint32_t vmax_mv = haptics->vmax; + + vmax_mv = clamp_t(uint32_t, vmax_mv, HAP_VMAX_MIN_MV, HAP_VMAX_MAX_MV); + vmax_mv = DIV_ROUND_CLOSEST(vmax_mv, HAP_VMAX_MIN_MV); + + val = FIELD_PREP(HAP_VMAX_MASK, vmax_mv); + + return regmap_update_bits(haptics->regmap, + haptics->base + HAP_VMAX_CFG_REG, + HAP_VMAX_MASK | HAP_WF_OVD_BIT, val); +} + +static int haptics_module_enable(struct spmi_haptics *haptics, bool enable) +{ + return regmap_update_bits(haptics->regmap, + haptics->base + HAP_EN_CTL_REG, HAP_EN_BIT, + enable ? HAP_EN_BIT : 0); +} + +static int haptics_play(struct spmi_haptics *haptics, bool play) +{ + return regmap_update_bits(haptics->regmap, haptics->base + HAP_PLAY_REG, + HAP_PLAY_BIT | HAP_PAUSE_BIT, + play ? HAP_PLAY_BIT : 0); +} + +static bool is_haptics_module_enabled(struct spmi_haptics *haptics) +{ + uint32_t val; + + regmap_read(haptics->regmap, haptics->base + HAP_EN_CTL_REG, &val); + return !!val; +} + +/* + * This IRQ is fired to tell us to load the next wave sample set. + * As we only currently support a single sample set, it's unused. + */ +static irqreturn_t haptics_play_irq(int irq, void *data) +{ + struct spmi_haptics *haptics = data; + + dev_dbg(haptics->dev, "play_irq triggered"); + + return IRQ_HANDLED; +} + +/* + * Fires every ~50ms whilst the haptics are active. + * If the SC_FLAG_BIT is set then that means there isn't a short circuit + * and we just need to clear the IRQ to indicate that the device should + * keep vibrating. + * + * Otherwise, it means a short circuit situation has occurred. + */ +static irqreturn_t haptics_sc_irq(int irq, void *data) +{ + struct spmi_haptics *haptics = data; + int ret; + uint32_t val; + long sc_delta_time_us; + ktime_t temp; + + mutex_lock(&haptics->play_lock); + + ret = regmap_read(haptics->regmap, haptics->base + HAP_STATUS_1_REG, + &val); + if (ret) + goto out; + + if (!(val & SC_FLAG_BIT)) { + haptics->sc_count = 0; + goto out; + } + + temp = ktime_get(); + sc_delta_time_us = ktime_us_delta(temp, haptics->last_sc_time); + haptics->last_sc_time = temp; + + if (sc_delta_time_us > SC_COUNT_RST_DELAY_US) + haptics->sc_count = 0; + else + haptics->sc_count++; + + ret = regmap_update_bits(haptics->regmap, + haptics->base + HAP_SC_CLR_REG, SC_CLR_BIT, + SC_CLR_BIT); + if (ret) + goto out; + + if (haptics->sc_count > SC_MAX_COUNT) { + cancel_work_sync(&haptics->work); + dev_err(haptics->dev, + "Short circuit persists, disabling haptics\n"); + ret = haptics_module_enable(haptics, false); + if (ret) + dev_err(haptics->dev, "Error disabling module, rc=%d\n", + ret); + } + +out: + mutex_unlock(&haptics->play_lock); + return IRQ_HANDLED; +} + +static int haptics_vibrate(struct spmi_haptics *haptics) +{ + int ret; + + if (haptics->sc_count > SC_MAX_COUNT) { + dev_err(haptics->dev, "Can't play while in short circuit"); + return -EINVAL; + } + + ret = haptics_write_vmax(haptics); + if (ret) + return ret; + + ret = haptics_module_enable(haptics, true); + if (ret) { + dev_err(haptics->dev, "Error enabling module, ret=%d\n", ret); + return ret; + } + + ret = haptics_play(haptics, true); + if (ret) { + dev_err(haptics->dev, "Error enabling play, ret=%d\n", ret); + return ret; + } + + return ret; +} + +static int haptics_stop_vibrate(struct spmi_haptics *haptics) +{ + int ret; + + ret = haptics_play(haptics, false); + if (ret) { + dev_err(haptics->dev, "Error disabling play, ret=%d\n", ret); + return ret; + } + + ret = haptics_module_enable(haptics, false); + if (ret) { + dev_err(haptics->dev, "Error disabling module, ret=%d\n", ret); + return ret; + } + + return ret; +} + +static void haptics_play_stop_work(struct work_struct *work) +{ + struct spmi_haptics *haptics = + container_of(work, struct spmi_haptics, work); + + int ret; + + mutex_lock(&haptics->play_lock); + + if (!is_haptics_module_enabled(haptics) && haptics->vmax) + ret = haptics_vibrate(haptics); + else + ret = haptics_stop_vibrate(haptics); + if (ret) + dev_err(haptics->dev, "Error setting haptics, ret=%d", ret); + + mutex_unlock(&haptics->play_lock); +} + +static int spmi_haptics_play_effect(struct input_dev *dev, void *data, + struct ff_effect *effect) +{ + struct spmi_haptics *haptics = input_get_drvdata(dev); + uint32_t magnitude; + + dev_dbg(haptics->dev, "%s: Rumbling with strong: %d and weak: %d", + __func__, effect->u.rumble.strong_magnitude, + effect->u.rumble.weak_magnitude); + + magnitude = effect->u.rumble.strong_magnitude >> 8; + if (!magnitude) + magnitude = effect->u.rumble.weak_magnitude >> 10; + + if (!magnitude) + haptics->vmax = 0; + else + haptics->vmax = + ((HAP_VMAX_MAX_MV - HAP_VMAX_MIN_MV) * magnitude) / + 100 + + HAP_VMAX_MIN_MV; + + schedule_work(&haptics->work); + + return 0; +} + +/** + * spmi_haptics_close - callback for input device close + * @dev: input device pointer + * + * Turns off the vibrator. + */ +static void spmi_haptics_close(struct input_dev *dev) +{ + struct spmi_haptics *haptics = input_get_drvdata(dev); + + cancel_work_sync(&haptics->work); + haptics->vmax = 0; + + if (is_haptics_module_enabled(haptics)) + haptics_stop_vibrate(haptics); +} + +static int haptics_write_brake_pattern(struct spmi_haptics *haptics, + const uint8_t *brake_pattern) +{ + int ret, i; + uint8_t val = 0; + + for (i = HAP_BRAKE_PAT_LEN - 1; i >= 0; i--) + val |= FIELD_PREP(HAP_BRAKE_PAT_MASK, brake_pattern[i]) + << (i * 2); + + ret = regmap_update_bits(haptics->regmap, haptics->base + HAP_BRAKE_REG, + 0xff, val); + + return ret ?: + regmap_update_bits(haptics->regmap, + haptics->base + HAP_EN_CTL2_REG, + BRAKE_EN_BIT, BRAKE_EN_BIT); +} + +static int haptics_init(struct spmi_haptics *haptics) +{ + int ret; + uint8_t val, mask; + uint16_t play_rate; + + ret = regmap_update_bits(haptics->regmap, haptics->base + HAP_CFG1_REG, + HAP_ACT_TYPE_MASK, haptics->actuator_type); + if (ret) + return ret; + + /* + * Configure auto resonance + * see qpnp_haptics_lra_auto_res_config downstream + * This is greatly simplified. + */ + val = FIELD_PREP(LRA_RES_CAL_MASK, ilog2(32 / HAP_RES_CAL_PERIOD_MIN)) | + FIELD_PREP(LRA_AUTO_RES_MODE_MASK, HAP_AUTO_RES_ZXD_EOP) | + FIELD_PREP(LRA_HIGH_Z_MASK, 1); + mask = LRA_AUTO_RES_MODE_MASK | LRA_HIGH_Z_MASK | LRA_RES_CAL_MASK; + + ret = regmap_update_bits(haptics->regmap, + haptics->base + HAP_LRA_AUTO_RES_REG, mask, + val); + if (ret) + return ret; + + val = FIELD_PREP(HAP_WF_SOURCE_MASK, haptics->play_mode); + ret = regmap_update_bits(haptics->regmap, haptics->base + HAP_SEL_REG, + HAP_WF_SOURCE_MASK, val); + if (ret) + return ret; + + ret = regmap_update_bits(haptics->regmap, + haptics->base + HAP_ILIM_CFG_REG, + HAP_ILIM_SEL_MASK, haptics->current_limit); + if (ret) + return ret; + + /* Configure the debounce for short-circuit detection. */ + ret = regmap_update_bits(haptics->regmap, + haptics->base + HAP_SC_DEB_REG, + HAP_SC_DEB_MASK, HAP_SC_DEB_CYCLES_MAX); + if (ret) + return ret; + + ret = regmap_update_bits(haptics->regmap, haptics->base + HAP_CFG2_REG, + HAP_LRA_RES_TYPE_MASK, haptics->wave_shape); + if (ret) + return ret; + + /* + * Configure RATE_CFG1 and RATE_CFG2 registers. + * Note: For ERM (unsupported) these registers act as play rate and + * for LRA these represent resonance period + */ + play_rate = haptics->play_wave_rate / HAP_RATE_CFG_STEP_US; + val = FIELD_PREP(HAP_RATE_CFG1_MASK, play_rate); + ret = regmap_update_bits(haptics->regmap, + haptics->base + HAP_RATE_CFG1_REG, + HAP_RATE_CFG1_MASK, val); + val = FIELD_PREP(HAP_RATE_CFG2_MASK, play_rate >> 8); + ret = ret ?: + regmap_update_bits(haptics->regmap, + haptics->base + HAP_RATE_CFG2_REG, + HAP_RATE_CFG1_MASK, val); + if (ret) + return ret; + + ret = haptics_write_brake_pattern(haptics, default_brake_pattern); + if (ret) + return ret; + + /* Currently this is the only supported play mode */ + if (haptics->play_mode == HAP_PLAY_BUFFER) { + /* zero repeats and zero sample repeats */ + val = FIELD_PREP(WF_REPEAT_MASK, 0) | + FIELD_PREP(WF_S_REPEAT_MASK, 0); + ret = regmap_update_bits(haptics->regmap, + haptics->base + HAP_WF_REPEAT_REG, + WF_REPEAT_MASK | WF_S_REPEAT_MASK, + val); + if (ret) + return ret; + + ret = regmap_bulk_write(haptics->regmap, + haptics->base + HAP_WF_S1_REG, + wave_sample_pattern, HAP_WAVE_SAMP_LEN); + if (ret) + return ret; + } + + return 0; +} + +static int spmi_haptics_probe(struct platform_device *pdev) +{ + struct spmi_haptics *haptics; + struct input_dev *input_dev; + int ret, irq; + + haptics = devm_kzalloc(&pdev->dev, sizeof(*haptics), GFP_KERNEL); + if (!haptics) + return -ENOMEM; + + haptics->regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!haptics->regmap) + return -ENODEV; + + haptics->dev = &pdev->dev; + + platform_set_drvdata(pdev, haptics); + + ret = device_property_read_u32(haptics->dev, "reg", &haptics->base); + if (ret) + return dev_err_probe(haptics->dev, ret, + "Couldn't read base address"); + + /* This is the only currently supported configuration, these values + * are left to allow future additions + */ + haptics->actuator_type = HAP_TYPE_LRA; + haptics->play_mode = HAP_PLAY_BUFFER; + haptics->wave_shape = HAP_WAVE_SINE; + haptics->current_limit = HAP_ILIM_400_MA; + + ret = device_property_read_u32(haptics->dev, "qcom,wave-play-rate-us", + &haptics->play_wave_rate); + if (ret) + return dev_err_probe(haptics->dev, ret, + "qcom,wave-play-rate-us is required\n"); + + INIT_WORK(&haptics->work, haptics_play_stop_work); + + ret = haptics_init(haptics); + if (ret) + return ret; + + input_dev = devm_input_allocate_device(&pdev->dev); + if (!input_dev) + return -ENOMEM; + + input_dev->name = "spmi_haptics"; + input_dev->id.version = 1; + input_dev->close = spmi_haptics_close; + input_set_drvdata(input_dev, haptics); + + haptics->input = input_dev; + + /* In the future this should become FF_PERIODIC */ + input_set_capability(haptics->input, EV_FF, FF_RUMBLE); + + ret = input_ff_create_memless(input_dev, NULL, + spmi_haptics_play_effect); + if (ret) + return dev_err_probe( + &pdev->dev, ret, + "Couldn't register haptics as EV_FF device\n"); + + ret = input_register_device(input_dev); + if (ret) + return dev_err_probe(&pdev->dev, ret, + "Couldn't register input device\n"); + + /* NOTE: the play IRQ is only used for buffer mode */ + irq = platform_get_irq_byname(pdev, "play"); + if (irq < 0) { + return dev_err_probe(&pdev->dev, irq, + "Unable to get play irq\n"); + } + ret = devm_request_threaded_irq(haptics->dev, irq, NULL, + haptics_play_irq, IRQF_ONESHOT, + "haptics_play_irq", haptics); + if (ret) + return dev_err_probe(haptics->dev, ret, + "Couldn't request play irq\n"); + + irq = platform_get_irq_byname(pdev, "short"); + if (irq < 0) + return dev_err_probe(&pdev->dev, irq, + "Unable to get short circut irq\n"); + ret = devm_request_threaded_irq(haptics->dev, irq, NULL, haptics_sc_irq, + IRQF_ONESHOT, "haptics_short_irq", + haptics); + if (ret) + return dev_err_probe(haptics->dev, ret, + "Couldn't request short circuit irq\n"); + + mutex_init(&haptics->play_lock); + + return 0; +} + +static int __maybe_unused spmi_haptics_suspend(struct device *dev) +{ + struct spmi_haptics *haptics = dev_get_drvdata(dev); + + cancel_work_sync(&haptics->work); + haptics_stop_vibrate(haptics); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(spmi_haptics_pm_ops, spmi_haptics_suspend, NULL); + +static int spmi_haptics_remove(struct platform_device *pdev) +{ + struct spmi_haptics *haptics = dev_get_drvdata(&pdev->dev); + + cancel_work_sync(&haptics->work); + mutex_destroy(&haptics->play_lock); + input_unregister_device(haptics->input); + + return 0; +} + +static void spmi_haptics_shutdown(struct platform_device *pdev) +{ + struct spmi_haptics *haptics = dev_get_drvdata(&pdev->dev); + + cancel_work_sync(&haptics->work); + haptics_stop_vibrate(haptics); +} + +static const struct of_device_id spmi_haptics_match_table[] = { + { .compatible = "qcom,spmi-haptics" }, + {} +}; +MODULE_DEVICE_TABLE(of, spmi_haptics_match_table); + +static struct platform_driver spmi_haptics_driver = { + .probe = spmi_haptics_probe, + .remove = spmi_haptics_remove, + .shutdown = spmi_haptics_shutdown, + .driver = { + .name = "spmi-haptics", + .pm = &spmi_haptics_pm_ops, + .of_match_table = spmi_haptics_match_table, + }, +}; +module_platform_driver(spmi_haptics_driver); + +MODULE_DESCRIPTION("spmi haptics driver using ff-memless framework"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Caleb Connolly ");