/* * Copyright (C) 2017 MediaTek, Inc. * * Author: Chen Zhong * * This software is licensed under the terms of the GNU General Public * License version 2, as published by the Free Software Foundation, and * may be copied, distributed, and modified under those terms. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define MTK_PMIC_PWRKEY_INDEX 0 #define MTK_PMIC_HOMEKEY_INDEX 1 #define MTK_PMIC_MAX_KEY_COUNT 2 #define MT6397_PWRKEY_RST_SHIFT 6 #define MT6397_HOMEKEY_RST_SHIFT 5 #define MT6397_RST_DU_SHIFT 8 #define MT6357_PWRKEY_RST_SHIFT 9 #define MT6357_HOMEKEY_RST_SHIFT 8 #define MT6357_RST_DU_SHIFT 12 #define MT6359_PWRKEY_RST_SHIFT 9 #define MT6359_HOMEKEY_RST_SHIFT 8 #define MT6359_RST_DU_SHIFT 12 #define PWRKEY_RST_EN 0x1 #define HOMEKEY_RST_EN 0x1 #define RST_DU_MASK 0x3 #define INVALID_VALUE 0 struct mtk_pmic_keys_regs { u32 deb_reg; u32 deb_mask; u32 intsel_reg; u32 intsel_mask; }; #define MTK_PMIC_KEYS_REGS(_deb_reg, _deb_mask, \ _intsel_reg, _intsel_mask) \ { \ .deb_reg = _deb_reg, \ .deb_mask = _deb_mask, \ .intsel_reg = _intsel_reg, \ .intsel_mask = _intsel_mask, \ } #define RELEASE_IRQ_INTERVAL 2 struct mtk_pmic_regs { const struct mtk_pmic_keys_regs keys_regs[MTK_PMIC_MAX_KEY_COUNT]; bool release_irq; u32 pmic_rst_reg; u32 pwrkey_rst_shift; u32 homekey_rst_shift; u32 rst_du_shift; }; static const struct mtk_pmic_regs mt6397_regs = { .keys_regs[MTK_PMIC_PWRKEY_INDEX] = MTK_PMIC_KEYS_REGS(MT6397_CHRSTATUS, 0x8, MT6397_INT_RSV, 0x10), .keys_regs[MTK_PMIC_HOMEKEY_INDEX] = MTK_PMIC_KEYS_REGS(MT6397_OCSTATUS2, 0x10, MT6397_INT_RSV, 0x8), .release_irq = false, .pmic_rst_reg = MT6397_TOP_RST_MISC, .pwrkey_rst_shift = MT6397_PWRKEY_RST_SHIFT, .homekey_rst_shift = MT6397_HOMEKEY_RST_SHIFT, .rst_du_shift = MT6397_RST_DU_SHIFT, }; static const struct mtk_pmic_regs mt6323_regs = { .keys_regs[MTK_PMIC_PWRKEY_INDEX] = MTK_PMIC_KEYS_REGS(MT6323_CHRSTATUS, 0x2, MT6323_INT_MISC_CON, 0x10), .keys_regs[MTK_PMIC_HOMEKEY_INDEX] = MTK_PMIC_KEYS_REGS(MT6323_CHRSTATUS, 0x4, MT6323_INT_MISC_CON, 0x8), .release_irq = false, .pmic_rst_reg = MT6323_TOP_RST_MISC, .pwrkey_rst_shift = MT6397_PWRKEY_RST_SHIFT, .homekey_rst_shift = MT6397_HOMEKEY_RST_SHIFT, .rst_du_shift = MT6397_RST_DU_SHIFT, }; static const struct mtk_pmic_regs mt6359_regs = { .keys_regs[MTK_PMIC_PWRKEY_INDEX] = MTK_PMIC_KEYS_REGS(MT6359_TOPSTATUS, 0x2, MT6359_PSC_TOP_INT_CON0, 0x1), .keys_regs[MTK_PMIC_HOMEKEY_INDEX] = MTK_PMIC_KEYS_REGS(MT6359_TOPSTATUS, 0x8, MT6359_PSC_TOP_INT_CON0, 0x2), .release_irq = true, .pmic_rst_reg = MT6359_TOP_RST_MISC, .pwrkey_rst_shift = MT6359_PWRKEY_RST_SHIFT, .homekey_rst_shift = MT6359_HOMEKEY_RST_SHIFT, .rst_du_shift = MT6359_RST_DU_SHIFT, }; static const struct mtk_pmic_regs mt6357_regs = { .keys_regs[MTK_PMIC_PWRKEY_INDEX] = MTK_PMIC_KEYS_REGS(MT6357_TOPSTATUS, 0x2, MT6357_PSC_TOP_INT_CON0, MT6357_RG_INT_EN_PWRKEY_MASK), .keys_regs[MTK_PMIC_HOMEKEY_INDEX] = MTK_PMIC_KEYS_REGS(MT6357_TOPSTATUS, MT6357_HOMEKEY_DEB_MASK, MT6357_PSC_TOP_INT_CON0, MT6357_RG_INT_EN_HOMEKEY_MASK), .release_irq = true, .pmic_rst_reg = MT6357_TOP_RST_MISC, .pwrkey_rst_shift = MT6357_PWRKEY_RST_SHIFT, .homekey_rst_shift = MT6357_HOMEKEY_RST_SHIFT, .rst_du_shift = MT6357_RST_DU_SHIFT, }; struct mtk_pmic_keys_info { struct mtk_pmic_keys *keys; const struct mtk_pmic_keys_regs *regs; unsigned int keycode; int irq; int release_irq_num; bool wakeup:1; }; struct mtk_pmic_keys { struct input_dev *input_dev; struct device *dev; struct regmap *regmap; struct mtk_pmic_keys_info keys[MTK_PMIC_MAX_KEY_COUNT]; }; enum mtk_pmic_keys_lp_mode { LP_DISABLE, LP_ONEKEY, LP_TWOKEY, }; struct mtk_pmic_keys *keys; static void mtk_pmic_keys_lp_reset_setup(struct mtk_pmic_keys *keys, const struct mtk_pmic_regs *pmic_regs) { int ret; u32 long_press_mode, long_press_debounce; u32 pmic_rst_reg = pmic_regs->pmic_rst_reg; u32 pwrkey_rst = PWRKEY_RST_EN << pmic_regs->pwrkey_rst_shift; u32 homekey_rst = HOMEKEY_RST_EN << pmic_regs->homekey_rst_shift; ret = of_property_read_u32(keys->dev->of_node, "power-off-time-sec", &long_press_debounce); if (ret) long_press_debounce = 0; regmap_update_bits(keys->regmap, pmic_rst_reg, RST_DU_MASK << pmic_regs->rst_du_shift, long_press_debounce << pmic_regs->rst_du_shift); ret = of_property_read_u32(keys->dev->of_node, "mediatek,long-press-mode", &long_press_mode); if (ret) long_press_mode = LP_DISABLE; switch (long_press_mode) { case LP_ONEKEY: regmap_update_bits(keys->regmap, pmic_rst_reg, pwrkey_rst, pwrkey_rst); regmap_update_bits(keys->regmap, pmic_rst_reg, homekey_rst, 0); break; case LP_TWOKEY: regmap_update_bits(keys->regmap, pmic_rst_reg, pwrkey_rst, pwrkey_rst); regmap_update_bits(keys->regmap, pmic_rst_reg, homekey_rst, homekey_rst); break; case LP_DISABLE: regmap_update_bits(keys->regmap, pmic_rst_reg, pwrkey_rst, 0); regmap_update_bits(keys->regmap, pmic_rst_reg, homekey_rst, 0); break; default: break; } } static irqreturn_t mtk_pmic_keys_release_irq_handler_thread( int irq, void *data) { struct mtk_pmic_keys_info *info = data; input_report_key(info->keys->input_dev, info->keycode, 0); input_sync(info->keys->input_dev); dev_dbg(info->keys->dev, "release key =%d using PMIC\n", info->keycode); return IRQ_HANDLED; } static irqreturn_t mtk_pmic_keys_irq_handler_thread(int irq, void *data) { struct mtk_pmic_keys_info *info = data; u32 key_deb, pressed; if (info->release_irq_num > 0) { pressed = 1; } else { regmap_read(info->keys->regmap, info->regs->deb_reg, &key_deb); key_deb &= info->regs->deb_mask; pressed = !key_deb; } input_report_key(info->keys->input_dev, info->keycode, pressed); input_sync(info->keys->input_dev); dev_dbg(info->keys->dev, "(%s) key =%d using PMIC\n", pressed ? "pressed" : "released", info->keycode); return IRQ_HANDLED; } static int mtk_pmic_key_setup(struct mtk_pmic_keys *keys, struct mtk_pmic_keys_info *info) { int ret; info->keys = keys; ret = regmap_update_bits(keys->regmap, info->regs->intsel_reg, info->regs->intsel_mask, info->regs->intsel_mask); if (ret < 0) return ret; ret = devm_request_threaded_irq(keys->dev, info->irq, NULL, mtk_pmic_keys_irq_handler_thread, IRQF_ONESHOT | IRQF_TRIGGER_HIGH, "mtk-pmic-keys", info); if (ret) { dev_dbg(keys->dev, "Failed to request IRQ: %d: %d\n", info->irq, ret); return ret; } if (info->release_irq_num > 0) { ret = devm_request_threaded_irq(keys->dev, info->release_irq_num, NULL, mtk_pmic_keys_release_irq_handler_thread, IRQF_ONESHOT | IRQF_TRIGGER_HIGH, "mtk-pmic-keys", info); if (ret) { dev_dbg(keys->dev, "Failed to request IRQ: %d: %d\n", info->release_irq_num, ret); return ret; } } input_set_capability(keys->input_dev, EV_KEY, info->keycode); return 0; } int mtk_pmic_pwrkey_status(void) { struct mtk_pmic_keys_info *pwrkey; const struct mtk_pmic_keys_regs *regs; u32 key_deb, pressed; if (!keys) return -EINVAL; pwrkey = &keys->keys[MTK_PMIC_PWRKEY_INDEX]; regs = pwrkey->regs; regmap_read(keys->regmap, regs->deb_reg, &key_deb); dev_info(keys->dev, "Read register 0x%x and mask 0x%x and value: 0x%x\n", regs->deb_reg, regs->deb_mask, key_deb); key_deb &= regs->deb_mask; pressed = !key_deb; dev_info(keys->dev, "%s power key\n", pressed ? "pressed" : "released"); return pressed; } EXPORT_SYMBOL(mtk_pmic_pwrkey_status); #ifdef CONFIG_SEC_DEBUG int mtk_pmic_homekey_status(void) { struct mtk_pmic_keys_info *homekey; const struct mtk_pmic_keys_regs *regs; u32 key_deb, pressed; if (!keys) return -EINVAL; homekey = &keys->keys[MTK_PMIC_HOMEKEY_INDEX]; regs = homekey->regs; regmap_read(keys->regmap, regs->deb_reg, &key_deb); dev_info(keys->dev, "Read register 0x%x and mask 0x%x and value: 0x%x\n", regs->deb_reg, regs->deb_mask, key_deb); key_deb &= regs->deb_mask; pressed = !key_deb; dev_info(keys->dev, "%s home key\n", pressed ? "pressed" : "released"); return pressed; } EXPORT_SYMBOL(mtk_pmic_homekey_status); #endif static int __maybe_unused mtk_pmic_keys_suspend(struct device *dev) { struct mtk_pmic_keys *keys = dev_get_drvdata(dev); int index; for (index = 0; index < MTK_PMIC_MAX_KEY_COUNT; index++) { if (keys->keys[index].wakeup) enable_irq_wake(keys->keys[index].irq); } return 0; } static int __maybe_unused mtk_pmic_keys_resume(struct device *dev) { struct mtk_pmic_keys *keys = dev_get_drvdata(dev); int index; for (index = 0; index < MTK_PMIC_MAX_KEY_COUNT; index++) { if (keys->keys[index].wakeup) disable_irq_wake(keys->keys[index].irq); } return 0; } static SIMPLE_DEV_PM_OPS(mtk_pmic_keys_pm_ops, mtk_pmic_keys_suspend, mtk_pmic_keys_resume); static const struct of_device_id of_mtk_pmic_keys_match_tbl[] = { { .compatible = "mediatek,mt6397-keys", .data = &mt6397_regs, }, { .compatible = "mediatek,mt6323-keys", .data = &mt6323_regs, }, { .compatible = "mediatek,mt6359-keys", .data = &mt6359_regs, }, { .compatible = "mediatek,mt6357-keys", .data = &mt6357_regs, }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, of_mtk_pmic_keys_match_tbl); static int mtk_pmic_keys_probe(struct platform_device *pdev) { int error, index = 0; unsigned int keycount; struct mt6397_chip *pmic_chip = dev_get_drvdata(pdev->dev.parent); struct device_node *node = pdev->dev.of_node, *child; const struct mtk_pmic_regs *mtk_pmic_regs; struct input_dev *input_dev; const struct of_device_id *of_id = of_match_device(of_mtk_pmic_keys_match_tbl, &pdev->dev); if (!of_id) return -EINVAL; keys = devm_kzalloc(&pdev->dev, sizeof(*keys), GFP_KERNEL); if (!keys) return -ENOMEM; keys->dev = &pdev->dev; keys->regmap = pmic_chip->regmap; mtk_pmic_regs = of_id->data; keys->input_dev = input_dev = devm_input_allocate_device(keys->dev); if (!input_dev) { dev_err(keys->dev, "input allocate device fail.\n"); return -ENOMEM; } input_dev->name = "mtk-pmic-keys"; input_dev->id.bustype = BUS_HOST; input_dev->id.vendor = 0x0001; input_dev->id.product = 0x0001; input_dev->id.version = 0x0001; __set_bit(EV_KEY, input_dev->evbit); keycount = of_get_available_child_count(node); if (keycount > MTK_PMIC_MAX_KEY_COUNT) { dev_err(keys->dev, "too many keys defined (%d)\n", keycount); return -EINVAL; } for_each_child_of_node(node, child) { keys->keys[index].regs = &mtk_pmic_regs->keys_regs[index]; keys->keys[index].irq = platform_get_irq(pdev, index); if (keys->keys[index].irq < 0) return keys->keys[index].irq; if (mtk_pmic_regs->release_irq) { keys->keys[index].release_irq_num = platform_get_irq( pdev, index + RELEASE_IRQ_INTERVAL); if (keys->keys[index].release_irq_num < 0) return keys->keys[index].release_irq_num; } error = of_property_read_u32(child, "linux,keycodes", &keys->keys[index].keycode); if (error) { dev_err(keys->dev, "failed to read key:%d linux,keycode property: %d\n", index, error); return error; } if (of_property_read_bool(child, "wakeup-source")) keys->keys[index].wakeup = true; error = mtk_pmic_key_setup(keys, &keys->keys[index]); if (error) { pr_info("Set key index = %d error.\n", index); return error; } index++; } error = input_register_device(input_dev); if (error) { dev_err(&pdev->dev, "register input device failed (%d)\n", error); return error; } mtk_pmic_keys_lp_reset_setup(keys, mtk_pmic_regs); platform_set_drvdata(pdev, keys); return 0; } static struct platform_driver pmic_keys_pdrv = { .probe = mtk_pmic_keys_probe, .driver = { .name = "mtk-pmic-keys", .of_match_table = of_mtk_pmic_keys_match_tbl, .pm = &mtk_pmic_keys_pm_ops, }, }; module_platform_driver(pmic_keys_pdrv); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Chen Zhong "); MODULE_DESCRIPTION("MTK pmic-keys driver v0.1");