From patchwork Fri Mar 8 22:24:20 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: James Ogletree X-Patchwork-Id: 778971 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 1E59A5FEE3; Fri, 8 Mar 2024 22:24:49 +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=1709936692; cv=none; b=iY0viIxNJReBGA1Pm2xvt2SE3R65WwAYqQ3bn2cM3Bbmu+RPG+USQNM15G6MqRws7L51oEkv+TO9Kr4yYG/SSHgZYV1uwOTb4nkrT8uNyL2CHlYxoUAkKVSE+bWWNUIxXyqg7YkgUAKWFGqr9fg0iLU6Nc16mz3r1qGIPdp1DX4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709936692; c=relaxed/simple; bh=/r6ohfUR/KkXldidmLlB0UN1VgfrG3jrFVYnMA3/4K8=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Hw6o+dU4Hi+/zddByZMQNesFPDO6ZQEA8SgR2LqO4C9pb1RNIJUTffE66stIRiuRUt2DdGBRbFd56xqqIwHpNguzbwcLJxm2yS/zD4pQQGg1R6WX21TTAt6uiPmQzGwcAoAIpfm10edyc4rbc2yqWrnwTW9PYI1tnyMiDqWJxCc= 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=BtoSxuPN; 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="BtoSxuPN" 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 428FgFSj026312; Fri, 8 Mar 2024 16:24:43 -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=rl65WRO9dg/U+/RUXFOhyVhaMAH9xOxca+dvlQys2hY=; b= BtoSxuPNnyzU9OIYRBg2rU0Bzu356O3UC17TPHIT2rZPpIYgKMeGfoqDiGXJO+ad L4re5yBDsqxihRkxRj1D2JtAcrny+u4yTMnx4O1GjJ8u57JEdx2ixUrh1v/2SCDx vNta8dN9uGkZN7jJc0Jp/EcSf58GajY32yTnBxbYwBXxPXNtSyAEoK/fUr4bUsvc EAgqdyXfZ+uYlUbCQ7Z6Qd9YYqYpN5+4akLMbxajJtW5L6JUT+NCYMv4ydzz+LtZ 9f95bfyHCjW/bgnLFO6XPt9EbP+Q9S1Oto12jhW0/blmxN7HDoDYI/6XJ8tormEx c4MmCuFZNSlYpU/kMnjNxA== Received: from ediex02.ad.cirrus.com ([84.19.233.68]) by mx0a-001ae601.pphosted.com (PPS) with ESMTPS id 3wm2d2qu06-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 08 Mar 2024 16:24:43 -0600 (CST) Received: from ediex02.ad.cirrus.com (198.61.84.81) by ediex02.ad.cirrus.com (198.61.84.81) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.4; Fri, 8 Mar 2024 22:24:41 +0000 Received: from ediswmail9.ad.cirrus.com (198.61.86.93) by anon-ediex02.ad.cirrus.com (198.61.84.81) with Microsoft SMTP Server id 15.2.1544.4 via Frontend Transport; Fri, 8 Mar 2024 22:24:41 +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 BBD49820270; Fri, 8 Mar 2024 22:24:39 +0000 (UTC) From: James Ogletree To: , , , , , , CC: , , , , James Ogletree Subject: [PATCH v9 4/5] Input: cs40l50 - Add support for the CS40L50 haptic driver Date: Fri, 8 Mar 2024 22:24:20 +0000 Message-ID: <20240308222421.188858-5-jogletre@opensource.cirrus.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240308222421.188858-1-jogletre@opensource.cirrus.com> References: <20240308222421.188858-1-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: YG00hRhCRUA_ujUgz2R0XlT7eHxwb9yz X-Proofpoint-GUID: YG00hRhCRUA_ujUgz2R0XlT7eHxwb9yz 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: v8: v9: Please advise if playback stop is still misused with respect to not specifying an effect ID. 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. So I'm unsure of the correct approach here. MAINTAINERS | 1 + drivers/input/misc/Kconfig | 10 + drivers/input/misc/Makefile | 1 + drivers/input/misc/cs40l50-vibra.c | 578 +++++++++++++++++++++++++++++ 4 files changed, 590 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..c7e68862bbfe --- /dev/null +++ b/drivers/input/misc/cs40l50-vibra.c @@ -0,0 +1,578 @@ +// 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) + goto err_free; + + 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 err; + + mutex_lock(&info->lock); + + /* Update effect if already present, otherwise create new effect */ + 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); +err: + 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); + u32 len = effect->u.periodic.custom_len; + struct vibra_work work_data; + + 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 err_free; + } + + work_data.custom_len = len; + work_data.info = info; + work_data.effect = effect; + 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); +err_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 err_free; + + 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); +err_free: + 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 drives only 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 err; + + 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 err_mutex; + } + + if (erase_effect->gpio_reg != CS40L50_GPIO_MAPPING_NONE) { + error = regmap_write(info->regmap, erase_effect->gpio_reg, + CS40L50_GPIO_DISABLE); + if (error) + goto err_mutex; + } + + 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 err_mutex; + + 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); +err_mutex: + mutex_unlock(&info->lock); + + pm_runtime_mark_last_busy(info->dev); + pm_runtime_put_autosuspend(info->dev); +err: + 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; + + work_data.info = info; + work_data.effect = &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) +{ + flush_workqueue(data); + destroy_workqueue(data); +} + +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->vibe_wq); + 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");