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 <jogletre@xxxxxxxxxxxxxxxxxxxxx> --- These comments may need attention: https://lore.kernel.org/linux-input/BC84DC9F-65FB-4553-A0B9-52151DD549DB@xxxxxxxxxx/ MAINTAINERS | 1 + drivers/input/misc/Kconfig | 10 + drivers/input/misc/Makefile | 1 + drivers/input/misc/cs40l50-vibra.c | 555 +++++++++++++++++++++++++++++ 4 files changed, 567 insertions(+) create mode 100644 drivers/input/misc/cs40l50-vibra.c diff --git a/MAINTAINERS b/MAINTAINERS index e804f3766cba..49c2e6e57b09 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4940,6 +4940,7 @@ M: Ben Bright <ben.bright@xxxxxxxxxx> L: patches@xxxxxxxxxxxxxxxxxxxxx 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..03bdb7c26ec0 --- /dev/null +++ b/drivers/input/misc/cs40l50-vibra.c @@ -0,0 +1,555 @@ +// 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 <james.ogletree@xxxxxxxxxx> + */ + +#include <linux/bitfield.h> +#include <linux/input.h> +#include <linux/mfd/cs40l50.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> + +/* 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 +#define CS40L50_CUSTOM_DATA_MASK 0xFFFFU + +/* DSP */ +#define CS40L50_GPIO_BASE 0x2804140 +#define CS40L50_OWT_BASE 0x2805C34 +#define CS40L50_OWT_SIZE 0x2805C38 +#define CS40L50_OWT_NEXT 0x2805C3C +#define CS40L50_EFFECTS_MAX 1 + +/* 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 cs40l50_bank_type { + CS40L50_WVFRM_BANK_RAM, + CS40L50_WVFRM_BANK_ROM, + CS40L50_WVFRM_BANK_OWT, + CS40L50_WVFRM_BANK_NUM, +}; + +/* Describes an area in DSP memory populated by effects */ +struct cs40l50_bank { + enum cs40l50_bank_type type; + u32 base_index; + u32 max_index; +}; + +struct cs40l50_effect { + enum cs40l50_bank_type type; + struct list_head list; + u32 gpio_reg; + u32 index; + int id; +}; + +/* Describes haptic interface of loaded DSP firmware */ +struct cs40l50_vibra_dsp { + struct cs40l50_bank *banks; + u32 gpio_base_reg; + u32 owt_offset_reg; + u32 owt_size_reg; + u32 owt_base_reg; + u32 push_owt_cmd; + u32 delete_owt_cmd; + u32 stop_cmd; + int (*write)(struct device *dev, struct regmap *regmap, u32 val); +}; + +/* Describes configuration and state of haptic operations */ +struct cs40l50_vibra { + struct device *dev; + struct regmap *regmap; + struct input_dev *input; + struct workqueue_struct *vib_wq; + struct list_head effect_head; + struct cs40l50_vibra_dsp dsp; +}; + +struct cs40l50_work { + struct cs40l50_vibra *vib; + struct ff_effect *effect; + struct work_struct work; + s16 *custom_data; + int custom_len; + int count; + int error; +}; + +static struct cs40l50_bank cs40l50_banks[] = { + { + .type = CS40L50_WVFRM_BANK_RAM, + .base_index = CS40L50_RAM_INDEX_START, + .max_index = CS40L50_RAM_INDEX_END, + }, + { + .type = CS40L50_WVFRM_BANK_ROM, + .base_index = CS40L50_ROM_INDEX_START, + .max_index = CS40L50_ROM_INDEX_END, + }, + { + .type = CS40L50_WVFRM_BANK_OWT, + .base_index = CS40L50_RTH_INDEX_START, + .max_index = CS40L50_RTH_INDEX_END, + }, +}; + +static struct cs40l50_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 cs40l50_effect *cs40l50_find_effect(int id, struct list_head *effect_head) +{ + struct cs40l50_effect *effect; + + list_for_each_entry(effect, effect_head, list) + if (effect->id == id) + return effect; + + return NULL; +} + +static int cs40l50_effect_bank_set(struct cs40l50_work *work_data, + struct cs40l50_effect *effect) +{ + s16 bank_type = work_data->custom_data[0] & CS40L50_CUSTOM_DATA_MASK; + + if (bank_type >= CS40L50_WVFRM_BANK_NUM) { + dev_err(work_data->vib->dev, "Invalid bank (%d)\n", bank_type); + return -EINVAL; + } + + if (work_data->custom_len > CS40L50_OWT_CUSTOM_DATA_SIZE) + effect->type = CS40L50_WVFRM_BANK_OWT; + else + effect->type = bank_type; + + return 0; +} + +static int cs40l50_effect_index_set(struct cs40l50_work *work_data, + struct cs40l50_effect *effect) +{ + struct cs40l50_vibra *vib = work_data->vib; + struct cs40l50_effect *owt_effect; + u32 base_index, max_index; + + base_index = vib->dsp.banks[effect->type].base_index; + max_index = vib->dsp.banks[effect->type].max_index; + + effect->index = base_index; + + switch (effect->type) { + case CS40L50_WVFRM_BANK_OWT: + list_for_each_entry(owt_effect, &vib->effect_head, list) + if (owt_effect->type == CS40L50_WVFRM_BANK_OWT) + effect->index++; + break; + case CS40L50_WVFRM_BANK_ROM: + case CS40L50_WVFRM_BANK_RAM: + effect->index += work_data->custom_data[1] & CS40L50_CUSTOM_DATA_MASK; + break; + default: + dev_err(vib->dev, "Bank type %d not supported\n", effect->type); + return -EINVAL; + } + + if (effect->index > max_index || effect->index < base_index) { + dev_err(vib->dev, "Index out of bounds: %u\n", effect->index); + return -ENOSPC; + } + + return 0; +} + +static int cs40l50_effect_gpio_mapping_set(struct cs40l50_work *work_data, + struct cs40l50_effect *effect) +{ + u16 gpio_edge, gpio_num, button = work_data->effect->trigger.button; + struct cs40l50_vibra *vib = work_data->vib; + + if (button) { + gpio_num = FIELD_GET(CS40L50_GPIO_NUM_MASK, button); + gpio_edge = FIELD_GET(CS40L50_GPIO_EDGE_MASK, button); + effect->gpio_reg = vib->dsp.gpio_base_reg + (gpio_num * 8) - gpio_edge; + + return regmap_write(vib->regmap, effect->gpio_reg, button); + } + + effect->gpio_reg = CS40L50_GPIO_MAPPING_NONE; + + return 0; +} + +struct cs40l50_owt_header { + u32 type; + u32 data_words; + u32 offset; +} __packed; + +static int cs40l50_upload_owt(struct cs40l50_work *work_data) +{ + u8 *new_owt_effect_data __free(kfree) = NULL; + struct cs40l50_vibra *vib = work_data->vib; + size_t len = work_data->custom_len * 2; + struct cs40l50_owt_header header; + u32 offset, size; + int error; + + error = regmap_read(vib->regmap, vib->dsp.owt_size_reg, &size); + if (error) + return error; + + if ((size * sizeof(u32)) < sizeof(header) + len) { + dev_err(vib->dev, "No space in open wavetable for effect\n"); + return -ENOSPC; + } + + 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); + + new_owt_effect_data = kmalloc(sizeof(header) + len, GFP_KERNEL); + + memcpy(new_owt_effect_data, &header, sizeof(header)); + memcpy(new_owt_effect_data + sizeof(header), work_data->custom_data, len); + + error = regmap_read(vib->regmap, vib->dsp.owt_offset_reg, &offset); + if (error) + return error; + + error = regmap_bulk_write(vib->regmap, vib->dsp.owt_base_reg + + (offset * sizeof(u32)), new_owt_effect_data, + sizeof(header) + len); + if (error) + return error; + + error = vib->dsp.write(vib->dev, vib->regmap, vib->dsp.push_owt_cmd); + if (error) + return error; + + return 0; +} + +static void cs40l50_add_worker(struct work_struct *work) +{ + struct cs40l50_work *work_data = container_of(work, struct cs40l50_work, work); + struct cs40l50_vibra *vib = work_data->vib; + struct cs40l50_effect *effect; + bool is_new = false; + int error; + + error = pm_runtime_resume_and_get(vib->dev); + if (error) + goto err_exit; + + /* Update effect if already uploaded, otherwise create new effect */ + effect = cs40l50_find_effect(work_data->effect->id, &vib->effect_head); + if (!effect) { + effect = kzalloc(sizeof(*effect), GFP_KERNEL); + if (!effect) { + error = -ENOMEM; + goto err_pm; + } + + effect->id = work_data->effect->id; + is_new = true; + } + + error = cs40l50_effect_bank_set(work_data, effect); + if (error) + goto err_free; + + error = cs40l50_effect_index_set(work_data, effect); + if (error) + goto err_free; + + error = cs40l50_effect_gpio_mapping_set(work_data, effect); + if (error) + goto err_free; + + if (effect->type == CS40L50_WVFRM_BANK_OWT) + error = cs40l50_upload_owt(work_data); +err_free: + if (is_new) { + if (error) + kfree(effect); + else + list_add(&effect->list, &vib->effect_head); + } +err_pm: + pm_runtime_mark_last_busy(vib->dev); + pm_runtime_put_autosuspend(vib->dev); +err_exit: + work_data->error = error; +} + +static int cs40l50_add(struct input_dev *dev, struct ff_effect *effect, + struct ff_effect *old) +{ + struct ff_periodic_effect *periodic = &effect->u.periodic; + struct cs40l50_vibra *vib = input_get_drvdata(dev); + struct cs40l50_work work_data; + + if (effect->type != FF_PERIODIC || periodic->waveform != FF_CUSTOM) { + dev_err(vib->dev, "Type (%#X) or waveform (%#X) unsupported\n", + effect->type, periodic->waveform); + return -EINVAL; + } + + work_data.custom_data = memdup_array_user(effect->u.periodic.custom_data, + effect->u.periodic.custom_len, + sizeof(s16)); + if (IS_ERR(work_data.custom_data)) + return PTR_ERR(work_data.custom_data); + + work_data.custom_len = effect->u.periodic.custom_len; + work_data.vib = vib; + work_data.effect = effect; + INIT_WORK(&work_data.work, cs40l50_add_worker); + + /* Push to the workqueue to serialize with playbacks */ + queue_work(vib->vib_wq, &work_data.work); + flush_work(&work_data.work); + + kfree(work_data.custom_data); + + return work_data.error; +} + +static void cs40l50_start_worker(struct work_struct *work) +{ + struct cs40l50_work *work_data = container_of(work, struct cs40l50_work, work); + struct cs40l50_vibra *vib = work_data->vib; + struct cs40l50_effect *start_effect; + + if (pm_runtime_resume_and_get(vib->dev) < 0) + goto err_free; + + start_effect = cs40l50_find_effect(work_data->effect->id, &vib->effect_head); + if (start_effect) { + while (--work_data->count >= 0) { + vib->dsp.write(vib->dev, vib->regmap, start_effect->index); + usleep_range(work_data->effect->replay.length, + work_data->effect->replay.length + 100); + } + } else { + dev_err(vib->dev, "Effect to play not found\n"); + } + + pm_runtime_mark_last_busy(vib->dev); + pm_runtime_put_autosuspend(vib->dev); +err_free: + kfree(work_data); +} + +static void cs40l50_stop_worker(struct work_struct *work) +{ + struct cs40l50_work *work_data = container_of(work, struct cs40l50_work, work); + struct cs40l50_vibra *vib = work_data->vib; + + if (pm_runtime_resume_and_get(vib->dev) < 0) + return; + + vib->dsp.write(vib->dev, vib->regmap, vib->dsp.stop_cmd); + + pm_runtime_mark_last_busy(vib->dev); + pm_runtime_put_autosuspend(vib->dev); + + kfree(work_data); +} + +static int cs40l50_playback(struct input_dev *dev, int effect_id, int val) +{ + struct cs40l50_vibra *vib = input_get_drvdata(dev); + struct cs40l50_work *work_data; + + work_data = kzalloc(sizeof(*work_data), GFP_ATOMIC); + if (!work_data) + return -ENOMEM; + + work_data->vib = vib; + + if (val > 0) { + work_data->effect = &dev->ff->effects[effect_id]; + work_data->count = val; + INIT_WORK(&work_data->work, cs40l50_start_worker); + } else { + /* Stop the amplifier as device drives only one effect */ + INIT_WORK(&work_data->work, cs40l50_stop_worker); + } + + queue_work(vib->vib_wq, &work_data->work); + + return 0; +} + +static void cs40l50_erase_worker(struct work_struct *work) +{ + struct cs40l50_work *work_data = container_of(work, struct cs40l50_work, work); + struct cs40l50_effect *erase_effect, *owt_effect; + struct cs40l50_vibra *vib = work_data->vib; + int error; + + error = pm_runtime_resume_and_get(vib->dev); + if (error) + goto err_exit; + + erase_effect = cs40l50_find_effect(work_data->effect->id, &vib->effect_head); + if (!erase_effect) { + dev_err(vib->dev, "Effect to erase not found\n"); + error = -EINVAL; + goto err_pm; + } + + if (erase_effect->gpio_reg != CS40L50_GPIO_MAPPING_NONE) { + error = regmap_write(vib->regmap, erase_effect->gpio_reg, + CS40L50_GPIO_DISABLE); + if (error) + goto err_pm; + } + + if (erase_effect->type == CS40L50_WVFRM_BANK_OWT) { + error = vib->dsp.write(vib->dev, vib->regmap, + vib->dsp.delete_owt_cmd | + (erase_effect->index & 0xFF)); + if (error) + goto err_pm; + + list_for_each_entry(owt_effect, &vib->effect_head, list) + if (owt_effect->type == CS40L50_WVFRM_BANK_OWT && + owt_effect->index > erase_effect->index) + owt_effect->index--; + } + + list_del(&erase_effect->list); + kfree(erase_effect); +err_pm: + pm_runtime_mark_last_busy(vib->dev); + pm_runtime_put_autosuspend(vib->dev); +err_exit: + work_data->error = error; +} + +static int cs40l50_erase(struct input_dev *dev, int effect_id) +{ + struct cs40l50_vibra *vib = input_get_drvdata(dev); + struct cs40l50_work work_data; + + work_data.vib = vib; + work_data.effect = &dev->ff->effects[effect_id]; + + INIT_WORK(&work_data.work, cs40l50_erase_worker); + + /* Push to workqueue to serialize with playbacks */ + queue_work(vib->vib_wq, &work_data.work); + flush_work(&work_data.work); + + return work_data.error; +} + +static void cs40l50_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 cs40l50_vibra *vib; + int error; + + vib = devm_kzalloc(pdev->dev.parent, sizeof(*vib), GFP_KERNEL); + if (!vib) + return -ENOMEM; + + vib->dev = cs40l50->dev; + vib->regmap = cs40l50->regmap; + vib->dsp = cs40l50_dsp; + + vib->input = devm_input_allocate_device(vib->dev); + if (!vib->input) + return -ENOMEM; + + vib->input->id.product = cs40l50->devid; + vib->input->id.version = cs40l50->revid; + vib->input->name = "cs40l50_vibra"; + + input_set_drvdata(vib->input, vib); + input_set_capability(vib->input, EV_FF, FF_PERIODIC); + input_set_capability(vib->input, EV_FF, FF_CUSTOM); + + error = input_ff_create(vib->input, CS40L50_EFFECTS_MAX); + if (error) { + dev_err(vib->dev, "Failed to create input device\n"); + return error; + } + + vib->input->ff->upload = cs40l50_add; + vib->input->ff->playback = cs40l50_playback; + vib->input->ff->erase = cs40l50_erase; + + INIT_LIST_HEAD(&vib->effect_head); + + vib->vib_wq = alloc_ordered_workqueue("vib_wq", WQ_HIGHPRI); + if (!vib->vib_wq) + return -ENOMEM; + + error = devm_add_action_or_reset(vib->dev, cs40l50_remove_wq, vib->vib_wq); + if (error) + return error; + + error = input_register_device(vib->input); + if (error) + return error; + + return 0; +} + +static const struct platform_device_id cs40l50_vibra_id_match[] = { + { "cs40l50-vibra", }, + {} +}; +MODULE_DEVICE_TABLE(platform, cs40l50_vibra_id_match); + +static struct platform_driver cs40l50_vibra_driver = { + .probe = cs40l50_vibra_probe, + .id_table = cs40l50_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. <james.ogletree@xxxxxxxxxx>"); +MODULE_LICENSE("GPL"); -- 2.34.1
