From patchwork Mon Feb 12 17:31:10 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: James Ogletree X-Patchwork-Id: 772159 Received: from mx0b-001ae601.pphosted.com (mx0a-001ae601.pphosted.com [67.231.149.25]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id ABCAA3E47E; Mon, 12 Feb 2024 17:31:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=67.231.149.25 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707759097; cv=none; b=RvCQsH64vvnqaZI2BpHN0mcBUPGvS7cNqRP6THwJUmEe27DklSfKFT7fo3hXtcrBl9BTvKFXnDCmFL9LyFP/CrLebwvxQai+gShLCWFpx50ALJxW2sFc3QrazYoT4yRRT8O8YcSON1yV/UPFV8gXlRrwgnj77zfKyu1PAr+O63M= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707759097; c=relaxed/simple; bh=3uvTDNPPpb4SerYcDImb90SaPyTKCwfqgs6CYU35n5g=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=fiuR4Pj8IPoqLHt7QjLBcNABMwnv3l9jGrJRJTYUdRVfFFKGtoKv+VfYB1M7DcHenYOHcs39m1K2guy8gEzFH46mk02c9i1O8pSG2YCQ8HkJm5QNp+6HbImbPOuJ+HhuhzHVANSz4MPg+lY6cYFfE9e/CZsEpZSSBRaXowiplsU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=opensource.cirrus.com; spf=pass smtp.mailfrom=opensource.cirrus.com; dkim=pass (2048-bit key) header.d=cirrus.com header.i=@cirrus.com header.b=hkIeHMJA; arc=none smtp.client-ip=67.231.149.25 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=opensource.cirrus.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=opensource.cirrus.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=cirrus.com header.i=@cirrus.com header.b="hkIeHMJA" Received: from pps.filterd (m0077473.ppops.net [127.0.0.1]) by mx0a-001ae601.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 41CHUGsm011046; Mon, 12 Feb 2024 11:31:29 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cirrus.com; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding:content-type; s= PODMain02222019; bh=+BSfi+xVlWKZNdjE4CsVbfPZzo7lWoTmdOOEkRMCWK8=; b= hkIeHMJAVd9bgvQK8kZsV9HAnzSy1dFj7Vlp/hinya+3/QOZwxFIcvg7qGCkvBLP MUyWQbFelQQM5flYUZxfvMANr6qN8tjgazHYbwb0ZiDYH0aFX7AJw5s2iLxF4tdr 0vPYME2h4DTlRpg/nKwMkun3RXSo4ST2vpLOPoa2rW3lHfaUqmSJBp/GMMgp6WGV XrEPdbobdTk8HMhlI4hvze8rFgoV356VoIjl+5cOzVLYIvNX0ZSV5PSxZ6KADbeH y40BvL060JW8suDsYIzcxvpdAJFKW7qz8IrLzJz4I2SJWyiJYfEZXnaCmchsF9Fj 27BWDtx0K0B2ft/EXwZYDw== Received: from ediex01.ad.cirrus.com ([84.19.233.68]) by mx0a-001ae601.pphosted.com (PPS) with ESMTPS id 3w67e224y7-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 12 Feb 2024 11:31:28 -0600 (CST) Received: from ediex01.ad.cirrus.com (198.61.84.80) by ediex01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Mon, 12 Feb 2024 17:31:26 +0000 Received: from ediswmail9.ad.cirrus.com (198.61.86.93) by ediex01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40 via Frontend Transport; Mon, 12 Feb 2024 17:31:26 +0000 Received: from aus-sw-rshr002.ad.cirrus.com (aus-sw-rshr002.ad.cirrus.com [141.131.145.53]) by ediswmail9.ad.cirrus.com (Postfix) with ESMTP id D0D1E820243; Mon, 12 Feb 2024 17:31:24 +0000 (UTC) From: James Ogletree To: , , , , , , CC: , , , , James Ogletree Subject: [PATCH v7 4/5] Input: cs40l50 - Add support for the CS40L50 haptic driver Date: Mon, 12 Feb 2024 17:31:10 +0000 Message-ID: <20240212173111.771107-5-jogletre@opensource.cirrus.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240212173111.771107-1-jogletre@opensource.cirrus.com> References: <20240212173111.771107-1-jogletre@opensource.cirrus.com> Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: Ho2aOrR_QlZgoPb35ZoWPSzx-bPJdxL_ X-Proofpoint-GUID: Ho2aOrR_QlZgoPb35ZoWPSzx-bPJdxL_ X-Proofpoint-Spam-Reason: safe Introduce support for Cirrus Logic Device CS40L50: a haptic driver with waveform memory, integrated DSP, and closed-loop algorithms. The input driver provides the interface for control of haptic effects through the device. Signed-off-by: James Ogletree --- v7: Please advise if playback stop is still misused with respect to not specifying an effect, and if so what the best way forward is. The device can only play one effect at a time, but setting max effects for the EVIOCGEFFECTS ioctl to 1 would restrict the number of uploads to 1 as well. Is there an alternative workaround here? Please correct any wrong assumptions. MAINTAINERS | 1 + drivers/input/misc/Kconfig | 10 + drivers/input/misc/Makefile | 1 + drivers/input/misc/cs40l50-vibra.c | 575 +++++++++++++++++++++++++++++ 4 files changed, 587 insertions(+) create mode 100644 drivers/input/misc/cs40l50-vibra.c diff --git a/MAINTAINERS b/MAINTAINERS index 69a9e0a3b968..24cfb4f017bb 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4940,6 +4940,7 @@ M: Ben Bright L: patches@opensource.cirrus.com S: Supported F: Documentation/devicetree/bindings/input/cirrus,cs40l50.yaml +F: drivers/input/misc/cs40l* F: drivers/mfd/cs40l* F: include/linux/mfd/cs40l* diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 6ba984d7f0b1..ee45dbb0636e 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -140,6 +140,16 @@ config INPUT_BMA150 To compile this driver as a module, choose M here: the module will be called bma150. +config INPUT_CS40L50_VIBRA + tristate "CS40L50 Haptic Driver support" + depends on MFD_CS40L50_CORE + help + Say Y here to enable support for Cirrus Logic's CS40L50 + haptic driver. + + To compile this driver as a module, choose M here: the + module will be called cs40l50-vibra. + config INPUT_E3X0_BUTTON tristate "NI Ettus Research USRP E3xx Button support." default n diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 04296a4abe8e..88279de6d3d5 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -28,6 +28,7 @@ obj-$(CONFIG_INPUT_CMA3000) += cma3000_d0x.o obj-$(CONFIG_INPUT_CMA3000_I2C) += cma3000_d0x_i2c.o obj-$(CONFIG_INPUT_COBALT_BTNS) += cobalt_btns.o obj-$(CONFIG_INPUT_CPCAP_PWRBUTTON) += cpcap-pwrbutton.o +obj-$(CONFIG_INPUT_CS40L50_VIBRA) += cs40l50-vibra.o obj-$(CONFIG_INPUT_DA7280_HAPTICS) += da7280.o obj-$(CONFIG_INPUT_DA9052_ONKEY) += da9052_onkey.o obj-$(CONFIG_INPUT_DA9055_ONKEY) += da9055_onkey.o diff --git a/drivers/input/misc/cs40l50-vibra.c b/drivers/input/misc/cs40l50-vibra.c new file mode 100644 index 000000000000..dce2a71fbb20 --- /dev/null +++ b/drivers/input/misc/cs40l50-vibra.c @@ -0,0 +1,575 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * CS40L50 Advanced Haptic Driver with waveform memory, + * integrated DSP, and closed-loop algorithms + * + * Copyright 2024 Cirrus Logic, Inc. + * + * Author: James Ogletree + */ + +#include +#include +#include +#include +#include + +/* Wavetables */ +#define CS40L50_RAM_INDEX_START 0x1000000 +#define CS40L50_RAM_INDEX_END 0x100007F +#define CS40L50_RTH_INDEX_START 0x1400000 +#define CS40L50_RTH_INDEX_END 0x1400001 +#define CS40L50_ROM_INDEX_START 0x1800000 +#define CS40L50_ROM_INDEX_END 0x180001A +#define CS40L50_TYPE_PCM 8 +#define CS40L50_TYPE_PWLE 12 +#define CS40L50_PCM_ID 0x0 +#define CS40L50_OWT_CUSTOM_DATA_SIZE 2 + +/* DSP */ +#define CS40L50_GPIO_BASE 0x2804140 +#define CS40L50_OWT_BASE 0x2805C34 +#define CS40L50_OWT_SIZE 0x2805C38 +#define CS40L50_OWT_NEXT 0x2805C3C + +/* GPIO */ +#define CS40L50_GPIO_NUM_MASK GENMASK(14, 12) +#define CS40L50_GPIO_EDGE_MASK BIT(15) +#define CS40L50_GPIO_MAPPING_NONE 0 +#define CS40L50_GPIO_DISABLE 0x1FF + +enum vibra_bank_type { + WVFRM_BANK_RAM, + WVFRM_BANK_ROM, + WVFRM_BANK_OWT, + WVFRM_BANK_NUM, +}; + +/* Describes an area in DSP memory populated by effects */ +struct vibra_bank { + enum vibra_bank_type bank; + u32 base_index; + u32 max_index; +}; + +struct vibra_effect { + enum vibra_bank_type bank; + struct list_head list; + u32 gpio_reg; + u32 index; + int id; +}; + +/* Describes haptic interface of loaded DSP firmware */ +struct vibra_dsp { + struct vibra_bank *banks; + u32 gpio_base_reg; + u32 owt_offset_reg; + u32 owt_size_reg; + u32 owt_base_reg; + int (*write)(struct device *dev, struct regmap *regmap, u32 val); + u32 push_owt_cmd; + u32 delete_owt_cmd; + u32 stop_cmd; +}; + +/* Describes configuration and state of haptic operations */ +struct vibra_info { + struct device *dev; + struct regmap *regmap; + struct input_dev *input; + struct mutex lock; + struct workqueue_struct *vibe_wq; + struct list_head effect_head; + struct vibra_dsp dsp; +}; + +struct vibra_work { + struct vibra_info *info; + struct ff_effect *effect; + struct work_struct work; + s16 *custom_data; + int custom_len; + int count; + int error; +}; + +static struct vibra_bank cs40l50_banks[] = { + { + .bank = WVFRM_BANK_RAM, + .base_index = CS40L50_RAM_INDEX_START, + .max_index = CS40L50_RAM_INDEX_END, + }, + { + .bank = WVFRM_BANK_ROM, + .base_index = CS40L50_ROM_INDEX_START, + .max_index = CS40L50_ROM_INDEX_END, + }, + { + .bank = WVFRM_BANK_OWT, + .base_index = CS40L50_RTH_INDEX_START, + .max_index = CS40L50_RTH_INDEX_END, + }, +}; + +static struct vibra_dsp cs40l50_dsp = { + .banks = cs40l50_banks, + .gpio_base_reg = CS40L50_GPIO_BASE, + .owt_base_reg = CS40L50_OWT_BASE, + .owt_offset_reg = CS40L50_OWT_NEXT, + .owt_size_reg = CS40L50_OWT_SIZE, + + .push_owt_cmd = CS40L50_OWT_PUSH, + .delete_owt_cmd = CS40L50_OWT_DELETE, + .stop_cmd = CS40L50_STOP_PLAYBACK, + + .write = cs40l50_dsp_write, +}; + +static struct vibra_effect *vibra_find_effect(int id, struct list_head *effect_head) +{ + struct vibra_effect *effect; + + list_for_each_entry(effect, effect_head, list) + if (effect->id == id) + return effect; + + return NULL; +} + +static int vibra_effect_bank_set(struct vibra_work *work_data, + struct vibra_effect *effect) +{ + s16 bank = work_data->custom_data[0] & 0xffffu; + + if (bank >= WVFRM_BANK_NUM) { + dev_err(work_data->info->dev, "Invalid waveform bank: %d\n", bank); + return -EINVAL; + } + + if (work_data->custom_len > CS40L50_OWT_CUSTOM_DATA_SIZE) + effect->bank = WVFRM_BANK_OWT; + else + effect->bank = bank; + + return 0; +} + +static int vibra_effect_gpio_mapping_set(struct vibra_work *work_data, + struct vibra_effect *effect) +{ + u16 button = work_data->effect->trigger.button; + struct vibra_info *info = work_data->info; + u32 gpio_num, gpio_edge; + + if (button) { + gpio_num = FIELD_GET(CS40L50_GPIO_NUM_MASK, button); + gpio_edge = FIELD_GET(CS40L50_GPIO_EDGE_MASK, button); + effect->gpio_reg = info->dsp.gpio_base_reg + (gpio_num * 8) - gpio_edge; + + return regmap_write(info->regmap, effect->gpio_reg, button); + } + + effect->gpio_reg = CS40L50_GPIO_MAPPING_NONE; + + return 0; +} + +static int vibra_effect_index_set(struct vibra_work *work_data, + struct vibra_effect *effect) +{ + struct vibra_info *info = work_data->info; + struct vibra_effect *owt_effect; + u32 base_index, max_index; + + base_index = info->dsp.banks[effect->bank].base_index; + max_index = info->dsp.banks[effect->bank].max_index; + + effect->index = base_index; + + switch (effect->bank) { + case WVFRM_BANK_OWT: + list_for_each_entry(owt_effect, &info->effect_head, list) + if (owt_effect->bank == WVFRM_BANK_OWT) + effect->index++; + break; + case WVFRM_BANK_ROM: + case WVFRM_BANK_RAM: + effect->index += work_data->custom_data[1] & 0xffffu; + break; + default: + dev_err(info->dev, "Bank not supported: %d\n", effect->bank); + return -EINVAL; + } + + if (effect->index > max_index || effect->index < base_index) { + dev_err(info->dev, "Index out of bounds: %u\n", effect->index); + return -ENOSPC; + } + + return 0; +} + +/* Describes a header for an OWT effect */ +struct owt_header { + u32 type; + u32 data_words; + u32 offset; +} __packed; + +static int vibra_upload_owt(struct vibra_work *work_data) +{ + u32 len = 2 * work_data->custom_len, wt_offset, wt_size; + struct vibra_info *info = work_data->info; + struct owt_header header; + u8 *out_data; + int error; + + error = regmap_read(info->regmap, info->dsp.owt_size_reg, &wt_size); + if (error) + return error; + + if ((wt_size * sizeof(u32)) < sizeof(header) + len) { + dev_err(info->dev, "No space in OWT bank for effect\n"); + return -ENOSPC; + } + + out_data = kzalloc(sizeof(header) + len, GFP_KERNEL); + if (!out_data) + return -ENOMEM; + + header.type = work_data->custom_data[0] == CS40L50_PCM_ID ? CS40L50_TYPE_PCM : + CS40L50_TYPE_PWLE; + header.offset = sizeof(header) / sizeof(u32); + header.data_words = len / sizeof(u32); + + memcpy(out_data, &header, sizeof(header)); + memcpy(out_data + sizeof(header), work_data->custom_data, len); + + error = regmap_read(info->regmap, info->dsp.owt_offset_reg, &wt_offset); + if (error) + return error; + + error = regmap_bulk_write(info->regmap, info->dsp.owt_base_reg + + (wt_offset * sizeof(u32)), out_data, + sizeof(header) + len); + if (error) + goto err_free; + + error = info->dsp.write(info->dev, info->regmap, info->dsp.push_owt_cmd); +err_free: + kfree(out_data); + + return error; +} + +static void vibra_add_worker(struct work_struct *work) +{ + struct vibra_work *work_data = container_of(work, struct vibra_work, work); + struct vibra_info *info = work_data->info; + struct vibra_effect *effect; + bool is_new = false; + int error; + + error = pm_runtime_resume_and_get(info->dev); + if (error < 0) + goto exit; + + mutex_lock(&info->lock); + + effect = vibra_find_effect(work_data->effect->id, &info->effect_head); + if (!effect) { + effect = kzalloc(sizeof(*effect), GFP_KERNEL); + if (!effect) { + error = -ENOMEM; + goto err_mutex; + } + + effect->id = work_data->effect->id; + is_new = true; + } + + error = vibra_effect_bank_set(work_data, effect); + if (error) + goto err_free; + + error = vibra_effect_index_set(work_data, effect); + if (error) + goto err_free; + + error = vibra_effect_gpio_mapping_set(work_data, effect); + if (error) + goto err_free; + + if (effect->bank == WVFRM_BANK_OWT) + error = vibra_upload_owt(work_data); +err_free: + if (is_new) { + if (error) + kfree(effect); + else + list_add(&effect->list, &info->effect_head); + } +err_mutex: + mutex_unlock(&info->lock); + + pm_runtime_mark_last_busy(info->dev); + pm_runtime_put_autosuspend(info->dev); +exit: + work_data->error = error; +} + +static int vibra_add(struct input_dev *dev, struct ff_effect *effect, + struct ff_effect *old) +{ + struct ff_periodic_effect *periodic = &effect->u.periodic; + struct vibra_info *info = input_get_drvdata(dev); + struct vibra_work work_data = { info, effect, }; + u32 len = effect->u.periodic.custom_len; + + if (effect->type != FF_PERIODIC || periodic->waveform != FF_CUSTOM) { + dev_err(info->dev, "Type (%#X) or waveform (%#X) unsupported\n", + effect->type, periodic->waveform); + return -EINVAL; + } + + work_data.custom_data = kcalloc(len, sizeof(s16), GFP_KERNEL); + if (!work_data.custom_data) + return -ENOMEM; + + if (copy_from_user(work_data.custom_data, effect->u.periodic.custom_data, + sizeof(s16) * len)) { + work_data.error = -EFAULT; + goto out_free; + } + + work_data.custom_len = len; + + INIT_WORK(&work_data.work, vibra_add_worker); + + /* Push to the workqueue to serialize with playbacks */ + queue_work(info->vibe_wq, &work_data.work); + flush_work(&work_data.work); +out_free: + kfree(work_data.custom_data); + + return work_data.error; +} + +static void vibra_start_worker(struct work_struct *work) +{ + struct vibra_work *work_data = container_of(work, struct vibra_work, work); + struct vibra_info *info = work_data->info; + struct vibra_effect *start_effect; + + if (pm_runtime_resume_and_get(info->dev) < 0) + goto error; + + mutex_lock(&info->lock); + + start_effect = vibra_find_effect(work_data->effect->id, &info->effect_head); + if (start_effect) { + while (--work_data->count >= 0) { + info->dsp.write(info->dev, info->regmap, start_effect->index); + usleep_range(work_data->effect->replay.length, + work_data->effect->replay.length + 100); + } + } + + mutex_unlock(&info->lock); + + if (!start_effect) + dev_err(info->dev, "Effect to play not found\n"); + + pm_runtime_mark_last_busy(info->dev); + pm_runtime_put_autosuspend(info->dev); +error: + kfree(work_data); +} + +static void vibra_stop_worker(struct work_struct *work) +{ + struct vibra_work *work_data = container_of(work, struct vibra_work, work); + struct vibra_info *info = work_data->info; + + if (pm_runtime_resume_and_get(info->dev) < 0) + return; + + mutex_lock(&info->lock); + + info->dsp.write(info->dev, info->regmap, info->dsp.stop_cmd); + + mutex_unlock(&info->lock); + + pm_runtime_mark_last_busy(info->dev); + pm_runtime_put_autosuspend(info->dev); + + kfree(work_data); +} + +static int vibra_playback(struct input_dev *dev, int effect_id, int val) +{ + struct vibra_info *info = input_get_drvdata(dev); + struct vibra_work *work_data; + + work_data = kzalloc(sizeof(*work_data), GFP_ATOMIC); + if (!work_data) + return -ENOMEM; + + work_data->info = info; + + if (val > 0) { + work_data->effect = &dev->ff->effects[effect_id]; + work_data->count = val; + INIT_WORK(&work_data->work, vibra_start_worker); + } else { + /* Stop the amplifier as device can only drive one effect */ + INIT_WORK(&work_data->work, vibra_stop_worker); + } + + queue_work(info->vibe_wq, &work_data->work); + + return 0; +} + +static void vibra_erase_worker(struct work_struct *work) +{ + struct vibra_work *work_data = container_of(work, struct vibra_work, work); + struct vibra_effect *owt_effect, *erase_effect; + struct vibra_info *info = work_data->info; + int error; + + error = pm_runtime_resume_and_get(info->dev); + if (error < 0) + goto exit; + + mutex_lock(&info->lock); + + erase_effect = vibra_find_effect(work_data->effect->id, &info->effect_head); + if (!erase_effect) { + dev_err(info->dev, "Effect to erase not found\n"); + error = -EINVAL; + goto error; + } + + if (erase_effect->gpio_reg != CS40L50_GPIO_MAPPING_NONE) { + error = regmap_write(info->regmap, erase_effect->gpio_reg, + CS40L50_GPIO_DISABLE); + if (error) + goto error; + } + + if (erase_effect->bank == WVFRM_BANK_OWT) { + error = info->dsp.write(info->dev, info->regmap, + info->dsp.delete_owt_cmd | + erase_effect->index); + if (error) + goto error; + + list_for_each_entry(owt_effect, &info->effect_head, list) + if (owt_effect->bank == WVFRM_BANK_OWT && + owt_effect->index > erase_effect->index) + owt_effect->index--; + } + + list_del(&erase_effect->list); + kfree(erase_effect); +error: + mutex_unlock(&info->lock); + + pm_runtime_mark_last_busy(info->dev); + pm_runtime_put_autosuspend(info->dev); +exit: + work_data->error = error; +} + +static int vibra_erase(struct input_dev *dev, int effect_id) +{ + struct vibra_info *info = input_get_drvdata(dev); + struct vibra_work work_data = { info, &dev->ff->effects[effect_id], }; + + INIT_WORK(&work_data.work, vibra_erase_worker); + + /* Push to workqueue to serialize with playbacks */ + queue_work(info->vibe_wq, &work_data.work); + flush_work(&work_data.work); + + return work_data.error; +} + +static void vibra_remove_wq(void *data) +{ + struct vibra_info *info = data; + + flush_workqueue(info->vibe_wq); + destroy_workqueue(info->vibe_wq); +} + +static int cs40l50_vibra_probe(struct platform_device *pdev) +{ + struct cs40l50 *cs40l50 = dev_get_drvdata(pdev->dev.parent); + struct vibra_info *info; + int error; + + info = devm_kzalloc(pdev->dev.parent, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + mutex_init(&info->lock); + + info->dev = cs40l50->dev; + info->regmap = cs40l50->regmap; + info->dsp = cs40l50_dsp; + + info->input = devm_input_allocate_device(info->dev); + if (!info->input) + return -ENOMEM; + info->input->id.product = cs40l50->devid & 0xFFFF; + info->input->id.version = cs40l50->revid; + info->input->name = "cs40l50_vibra"; + + input_set_drvdata(info->input, info); + input_set_capability(info->input, EV_FF, FF_PERIODIC); + input_set_capability(info->input, EV_FF, FF_CUSTOM); + + error = input_ff_create(info->input, FF_MAX_EFFECTS); + if (error) { + dev_err(info->dev, "Failed to create input device\n"); + return error; + } + + info->input->ff->upload = vibra_add; + info->input->ff->playback = vibra_playback; + info->input->ff->erase = vibra_erase; + + INIT_LIST_HEAD(&info->effect_head); + + info->vibe_wq = alloc_ordered_workqueue("vibe_wq", WQ_HIGHPRI); + if (!info->vibe_wq) + return -ENOMEM; + + error = devm_add_action_or_reset(info->dev, vibra_remove_wq, info); + if (error) + return error; + + return input_register_device(info->input); +} + +static const struct platform_device_id vibra_id_match[] = { + { "cs40l50-vibra", }, + {} +}; +MODULE_DEVICE_TABLE(platform, vibra_id_match); + +static struct platform_driver cs40l50_vibra_driver = { + .probe = cs40l50_vibra_probe, + .id_table = vibra_id_match, + .driver = { + .name = "cs40l50-vibra", + }, +}; +module_platform_driver(cs40l50_vibra_driver); + +MODULE_DESCRIPTION("CS40L50 Advanced Haptic Driver"); +MODULE_AUTHOR("James Ogletree, Cirrus Logic Inc. "); +MODULE_LICENSE("GPL");