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201 lines
5.0 KiB
201 lines
5.0 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (C) 2018 Spreadtrum Communications Inc. |
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*/ |
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#include <linux/device.h> |
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#include <linux/input.h> |
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#include <linux/mod_devicetable.h> |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/property.h> |
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#include <linux/regmap.h> |
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#include <linux/workqueue.h> |
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#define CUR_DRV_CAL_SEL GENMASK(13, 12) |
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#define SLP_LDOVIBR_PD_EN BIT(9) |
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#define LDO_VIBR_PD BIT(8) |
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#define SC2730_CUR_DRV_CAL_SEL 0 |
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#define SC2730_SLP_LDOVIBR_PD_EN BIT(14) |
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#define SC2730_LDO_VIBR_PD BIT(13) |
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struct sc27xx_vibra_data { |
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u32 cur_drv_cal_sel; |
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u32 slp_pd_en; |
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u32 ldo_pd; |
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}; |
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struct vibra_info { |
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struct input_dev *input_dev; |
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struct work_struct play_work; |
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struct regmap *regmap; |
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const struct sc27xx_vibra_data *data; |
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u32 base; |
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u32 strength; |
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bool enabled; |
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}; |
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static const struct sc27xx_vibra_data sc2731_data = { |
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.cur_drv_cal_sel = CUR_DRV_CAL_SEL, |
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.slp_pd_en = SLP_LDOVIBR_PD_EN, |
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.ldo_pd = LDO_VIBR_PD, |
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}; |
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static const struct sc27xx_vibra_data sc2730_data = { |
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.cur_drv_cal_sel = SC2730_CUR_DRV_CAL_SEL, |
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.slp_pd_en = SC2730_SLP_LDOVIBR_PD_EN, |
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.ldo_pd = SC2730_LDO_VIBR_PD, |
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}; |
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static const struct sc27xx_vibra_data sc2721_data = { |
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.cur_drv_cal_sel = CUR_DRV_CAL_SEL, |
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.slp_pd_en = SLP_LDOVIBR_PD_EN, |
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.ldo_pd = LDO_VIBR_PD, |
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}; |
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static void sc27xx_vibra_set(struct vibra_info *info, bool on) |
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{ |
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const struct sc27xx_vibra_data *data = info->data; |
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if (on) { |
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regmap_update_bits(info->regmap, info->base, data->ldo_pd, 0); |
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regmap_update_bits(info->regmap, info->base, |
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data->slp_pd_en, 0); |
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info->enabled = true; |
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} else { |
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regmap_update_bits(info->regmap, info->base, data->ldo_pd, |
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data->ldo_pd); |
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regmap_update_bits(info->regmap, info->base, |
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data->slp_pd_en, data->slp_pd_en); |
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info->enabled = false; |
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} |
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} |
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static int sc27xx_vibra_hw_init(struct vibra_info *info) |
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{ |
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const struct sc27xx_vibra_data *data = info->data; |
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if (!data->cur_drv_cal_sel) |
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return 0; |
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return regmap_update_bits(info->regmap, info->base, |
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data->cur_drv_cal_sel, 0); |
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} |
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static void sc27xx_vibra_play_work(struct work_struct *work) |
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{ |
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struct vibra_info *info = container_of(work, struct vibra_info, |
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play_work); |
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if (info->strength && !info->enabled) |
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sc27xx_vibra_set(info, true); |
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else if (info->strength == 0 && info->enabled) |
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sc27xx_vibra_set(info, false); |
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} |
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static int sc27xx_vibra_play(struct input_dev *input, void *data, |
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struct ff_effect *effect) |
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{ |
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struct vibra_info *info = input_get_drvdata(input); |
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info->strength = effect->u.rumble.weak_magnitude; |
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schedule_work(&info->play_work); |
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return 0; |
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} |
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static void sc27xx_vibra_close(struct input_dev *input) |
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{ |
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struct vibra_info *info = input_get_drvdata(input); |
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cancel_work_sync(&info->play_work); |
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if (info->enabled) |
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sc27xx_vibra_set(info, false); |
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} |
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static int sc27xx_vibra_probe(struct platform_device *pdev) |
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{ |
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struct vibra_info *info; |
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const struct sc27xx_vibra_data *data; |
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int error; |
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data = device_get_match_data(&pdev->dev); |
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if (!data) { |
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dev_err(&pdev->dev, "no matching driver data found\n"); |
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return -EINVAL; |
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} |
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info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); |
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if (!info) |
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return -ENOMEM; |
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info->regmap = dev_get_regmap(pdev->dev.parent, NULL); |
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if (!info->regmap) { |
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dev_err(&pdev->dev, "failed to get vibrator regmap.\n"); |
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return -ENODEV; |
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} |
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error = device_property_read_u32(&pdev->dev, "reg", &info->base); |
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if (error) { |
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dev_err(&pdev->dev, "failed to get vibrator base address.\n"); |
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return error; |
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} |
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info->input_dev = devm_input_allocate_device(&pdev->dev); |
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if (!info->input_dev) { |
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dev_err(&pdev->dev, "failed to allocate input device.\n"); |
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return -ENOMEM; |
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} |
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info->input_dev->name = "sc27xx:vibrator"; |
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info->input_dev->id.version = 0; |
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info->input_dev->close = sc27xx_vibra_close; |
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info->data = data; |
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input_set_drvdata(info->input_dev, info); |
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input_set_capability(info->input_dev, EV_FF, FF_RUMBLE); |
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INIT_WORK(&info->play_work, sc27xx_vibra_play_work); |
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info->enabled = false; |
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error = sc27xx_vibra_hw_init(info); |
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if (error) { |
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dev_err(&pdev->dev, "failed to initialize the vibrator.\n"); |
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return error; |
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} |
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error = input_ff_create_memless(info->input_dev, NULL, |
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sc27xx_vibra_play); |
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if (error) { |
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dev_err(&pdev->dev, "failed to register vibrator to FF.\n"); |
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return error; |
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} |
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error = input_register_device(info->input_dev); |
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if (error) { |
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dev_err(&pdev->dev, "failed to register input device.\n"); |
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return error; |
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} |
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return 0; |
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} |
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static const struct of_device_id sc27xx_vibra_of_match[] = { |
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{ .compatible = "sprd,sc2721-vibrator", .data = &sc2721_data }, |
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{ .compatible = "sprd,sc2730-vibrator", .data = &sc2730_data }, |
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{ .compatible = "sprd,sc2731-vibrator", .data = &sc2731_data }, |
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{} |
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}; |
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MODULE_DEVICE_TABLE(of, sc27xx_vibra_of_match); |
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static struct platform_driver sc27xx_vibra_driver = { |
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.driver = { |
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.name = "sc27xx-vibrator", |
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.of_match_table = sc27xx_vibra_of_match, |
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}, |
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.probe = sc27xx_vibra_probe, |
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}; |
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module_platform_driver(sc27xx_vibra_driver); |
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MODULE_DESCRIPTION("Spreadtrum SC27xx Vibrator Driver"); |
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MODULE_LICENSE("GPL v2"); |
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MODULE_AUTHOR("Xiaotong Lu <[email protected]>");
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