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Thu, 26 Dec 2019 20:06:00 -0800 Received: from mtkmbs07n1.mediatek.inc (172.21.101.16) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 26 Dec 2019 18:35:47 -0800 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Fri, 27 Dec 2019 09:35:04 +0800 Received: from localhost.localdomain (10.15.20.246) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Fri, 27 Dec 2019 09:35:14 +0800 From: fengping.yu To: Matthias Brugger Subject: [PATCH V2 2/2] drivers: input: keyboard Date: Fri, 27 Dec 2019 09:34:18 +0800 Message-ID: <20191227013418.19842-3-fengping.yu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20191227013418.19842-1-fengping.yu@mediatek.com> References: <20191227013418.19842-1-fengping.yu@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191226_200610_326060_62FC185A X-CRM114-Status: GOOD ( 14.46 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, "fengping.yu" , linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, wsd_upstream@mediatek.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org add mtk keypad driver Change-Id: I778def5a83621a5242d0bac7abfa20a7e5f89924 Signed-off-by: fengping.yu --- arch/arm64/configs/defconfig | 1 + drivers/input/keyboard/Kconfig | 8 + drivers/input/keyboard/Makefile | 1 + drivers/input/keyboard/mtk-kpd.c | 357 +++++++++++++++++++++++++++++++ 4 files changed, 367 insertions(+) create mode 100644 drivers/input/keyboard/mtk-kpd.c diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig index 8e05c39eab08..62bed77ec127 100644 --- a/arch/arm64/configs/defconfig +++ b/arch/arm64/configs/defconfig @@ -315,6 +315,7 @@ CONFIG_KEYBOARD_ADC=m CONFIG_KEYBOARD_GPIO=y CONFIG_KEYBOARD_SNVS_PWRKEY=m CONFIG_KEYBOARD_CROS_EC=y +CONFIG_KEYBOARD_MTK=y CONFIG_INPUT_TOUCHSCREEN=y CONFIG_TOUCHSCREEN_ATMEL_MXT=m CONFIG_INPUT_MISC=y diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index 8911bc2ec42a..01747a97536b 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -775,4 +775,12 @@ config KEYBOARD_MTK_PMIC To compile this driver as a module, choose M here: the module will be called pmic-keys. +config KEYBOARD_MTK + tristate "MediaTek Keypad Support" + help + Say Y here if you want to use the keypad. + If unuse, say N. + To compile this driver as a module, choose M here: the + module will be called mtk-kpd. + endif diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile index 9510325c0c5d..daa654bcce6e 100644 --- a/drivers/input/keyboard/Makefile +++ b/drivers/input/keyboard/Makefile @@ -41,6 +41,7 @@ obj-$(CONFIG_KEYBOARD_MATRIX) += matrix_keypad.o obj-$(CONFIG_KEYBOARD_MAX7359) += max7359_keypad.o obj-$(CONFIG_KEYBOARD_MCS) += mcs_touchkey.o obj-$(CONFIG_KEYBOARD_MPR121) += mpr121_touchkey.o +obj-$(CONFIG_KEYBOARD_MTK) += mtk-kpd.o obj-$(CONFIG_KEYBOARD_MTK_PMIC) += mtk-pmic-keys.o obj-$(CONFIG_KEYBOARD_NEWTON) += newtonkbd.o obj-$(CONFIG_KEYBOARD_NOMADIK) += nomadik-ske-keypad.o diff --git a/drivers/input/keyboard/mtk-kpd.c b/drivers/input/keyboard/mtk-kpd.c new file mode 100644 index 000000000000..740a58b44dac --- /dev/null +++ b/drivers/input/keyboard/mtk-kpd.c @@ -0,0 +1,357 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 MediaTek Inc. + * Author Terry Chang + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define KPD_NAME "mtk-kpd" + +#define KP_STA (0x0000) +#define KP_MEM1 (0x0004) +#define KP_MEM2 (0x0008) +#define KP_MEM3 (0x000c) +#define KP_MEM4 (0x0010) +#define KP_MEM5 (0x0014) +#define KP_DEBOUNCE (0x0018) +#define KP_SEL (0x0020) +#define KP_EN (0x0024) + +#define KP_COL0_SEL (1 << 10) +#define KP_COL1_SEL (1 << 11) +#define KP_COL2_SEL (1 << 12) + +#define KPD_DEBOUNCE_MASK ((1U << 14) - 1) +#define KPD_DOUBLE_KEY_MASK (1U << 0) + +#define KPD_NUM_MEMS 5 +#define KPD_MEM5_BITS 8 +#define KPD_NUM_KEYS 72 /* 4 * 16 + KPD_MEM5_BITS */ + +struct mtk_keypad { + struct input_dev *input_dev; + struct wakeup_source *suspend_lock; + struct tasklet_struct tasklet; + struct clk *clk; + void __iomem *base; + unsigned int irqnr; + u32 key_debounce; + u32 hw_map_num; + u32 hw_init_map[KPD_NUM_KEYS]; + u16 keymap_state[KPD_NUM_MEMS]; +}; + +/* for keymap handling */ +static void kpd_keymap_handler(unsigned long data); + +static int kpd_pdrv_probe(struct platform_device *pdev); + +static void kpd_get_keymap_state(void __iomem *kp_base, u16 state[]) +{ + state[0] = readw(kp_base + KP_MEM1); + state[1] = readw(kp_base + KP_MEM2); + state[2] = readw(kp_base + KP_MEM3); + state[3] = readw(kp_base + KP_MEM4); + state[4] = readw(kp_base + KP_MEM5); + pr_debug("kpd register = %x %x %x %x %x\n", + state[0], state[1], state[2], state[3], state[4]); +} + +static void kpd_keymap_handler(unsigned long data) +{ + int i, j; + int pressed; + u16 new_state[KPD_NUM_MEMS], change, mask; + u16 hw_keycode, keycode; + void *dest; + struct mtk_keypad *keypad = (struct mtk_keypad *)data; + + kpd_get_keymap_state(keypad->base, new_state); + + __pm_wakeup_event(keypad->suspend_lock, 500); + + for (i = 0; i < KPD_NUM_MEMS; i++) { + change = new_state[i] ^ keypad->keymap_state[i]; + if (!change) + continue; + + for (j = 0; j < 16U; j++) { + mask = (u16)1 << j; + if (!(change & mask)) + continue; + + hw_keycode = (i << 4) + j; + + if (hw_keycode >= KPD_NUM_KEYS) + continue; + + /* bit is 1: not pressed, 0: pressed */ + pressed = (new_state[i] & mask) == 0U; + pr_debug("(%s) HW keycode = %d\n", + (pressed) ? "pressed" : "released", + hw_keycode); + + keycode = keypad->hw_init_map[hw_keycode]; + if (!keycode) + continue; + input_report_key(keypad->input_dev, keycode, pressed); + input_sync(keypad->input_dev); + pr_debug("report Linux keycode = %d\n", keycode); + } + } + + dest = memcpy(keypad->keymap_state, new_state, sizeof(new_state)); + enable_irq(keypad->irqnr); +} + +static irqreturn_t kpd_irq_handler(int irq, void *dev_id) +{ + /* use _nosync to avoid deadlock */ + struct mtk_keypad *keypad = dev_id; + + disable_irq_nosync(keypad->irqnr); + tasklet_schedule(&keypad->tasklet); + return IRQ_HANDLED; +} + +static int kpd_get_dts_info(struct mtk_keypad *keypad, + struct device_node *node) +{ + int ret; + + ret = of_property_read_u32(node, "mediatek,key-debounce-ms", + &keypad->key_debounce); + if (ret) { + pr_debug("read mediatek,key-debounce-ms error.\n"); + return ret; + } + + ret = of_property_read_u32(node, "mediatek,hw-map-num", + &keypad->hw_map_num); + if (ret) { + pr_debug("read mediatek,hw-map-num error.\n"); + return ret; + } + + if (keypad->hw_map_num > KPD_NUM_KEYS) { + pr_debug("hw-map-num error, it cannot bigger than %d.\n", + KPD_NUM_KEYS); + return -EINVAL; + } + + ret = of_property_read_u32_array(node, "mediatek,hw-init-map", + keypad->hw_init_map, + keypad->hw_map_num); + + if (ret) { + pr_debug("hw-init-map was not defined in dts.\n"); + return ret; + } + + pr_debug("deb= %d\n", keypad->key_debounce); + + return 0; +} + +static int kpd_gpio_init(struct device *dev) +{ + struct pinctrl *keypad_pinctrl; + struct pinctrl_state *kpd_default; + + keypad_pinctrl = devm_pinctrl_get(dev); + if (IS_ERR(keypad_pinctrl)) { + pr_debug("Cannot find keypad_pinctrl!\n"); + + return (int)PTR_ERR(keypad_pinctrl); + } + + kpd_default = pinctrl_lookup_state(keypad_pinctrl, "default"); + if (IS_ERR(kpd_default)) { + pr_debug("Cannot find ecall_state!\n"); + + return (int)PTR_ERR(kpd_default); + } + + return pinctrl_select_state(keypad_pinctrl, + kpd_default); +} + +static int kpd_pdrv_probe(struct platform_device *pdev) +{ + struct mtk_keypad *keypad; + struct resource *res; + int i; + int err; + + keypad = devm_kzalloc(&pdev->dev, sizeof(*keypad), GFP_KERNEL); + if (!keypad) + return -ENOMEM; + + keypad->clk = devm_clk_get(&pdev->dev, "kpd"); + if (IS_ERR(keypad->clk)) { + pr_notice("get kpd-clk fail: %d\n", (int)PTR_ERR(keypad->clk)); + return (int)PTR_ERR(keypad->clk); + } + + err = clk_prepare_enable(keypad->clk); + if (err) { + pr_notice("kpd-clk prepare enable failed.\n"); + return err; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + err = -ENODEV; + goto err_unprepare_clk; + } + + keypad->base = devm_ioremap(&pdev->dev, res->start, + resource_size(res)); + if (!keypad->base) { + pr_notice("KP iomap failed\n"); + err = -EBUSY; + goto err_unprepare_clk; + } + + keypad->irqnr = irq_of_parse_and_map(pdev->dev.of_node, 0); + if (!keypad->irqnr) { + pr_notice("KP get irqnr failed\n"); + err = -ENODEV; + goto err_unprepare_clk; + } + + pr_info("kp base: 0x%p, addr:0x%p, kp irq: %d\n", + keypad->base, &keypad->base, keypad->irqnr); + err = kpd_gpio_init(&pdev->dev); + if (err) { + pr_debug("gpio init failed\n"); + goto err_unprepare_clk; + } + + err = kpd_get_dts_info(keypad, pdev->dev.of_node); + if (err) { + pr_debug("get dts info failed.\n"); + goto err_unprepare_clk; + } + + memset(keypad->keymap_state, 0xff, sizeof(keypad->keymap_state)); + + keypad->input_dev = devm_input_allocate_device(&pdev->dev); + if (!keypad->input_dev) { + pr_notice("input allocate device fail.\n"); + err = -ENOMEM; + goto err_unprepare_clk; + } + + keypad->input_dev->name = KPD_NAME; + keypad->input_dev->id.bustype = BUS_HOST; + keypad->input_dev->dev.parent = &pdev->dev; + + __set_bit(EV_KEY, keypad->input_dev->evbit); + + for (i = 0; i < KPD_NUM_KEYS; i++) { + if (keypad->hw_init_map[i]) + __set_bit(keypad->hw_init_map[i], + keypad->input_dev->keybit); + } + + err = input_register_device(keypad->input_dev); + if (err) { + pr_notice("register input device failed (%d)\n", err); + goto err_unprepare_clk; + } + + input_set_drvdata(keypad->input_dev, keypad); + + keypad->suspend_lock = wakeup_source_register(NULL, "kpd wakelock"); + if (!keypad->suspend_lock) { + pr_notice("wakeup source init failed.\n"); + err = -ENOMEM; + goto err_unregister_device; + } + + tasklet_init(&keypad->tasklet, kpd_keymap_handler, + (unsigned long)keypad); + + writew((u16)(keypad->key_debounce & KPD_DEBOUNCE_MASK), + keypad->base + KP_DEBOUNCE); + + /* register IRQ */ + err = request_irq(keypad->irqnr, kpd_irq_handler, IRQF_TRIGGER_NONE, + KPD_NAME, keypad); + if (err) { + pr_notice("register IRQ failed (%d)\n", err); + goto err_irq; + } + + pr_info("kpd_probe OK.\n"); + + return 0; + +err_irq: + tasklet_kill(&keypad->tasklet); + wakeup_source_unregister(keypad->suspend_lock); + +err_unregister_device: + input_unregister_device(keypad->input_dev); + +err_unprepare_clk: + clk_disable_unprepare(keypad->clk); + + return err; +} + +static int kpd_pdrv_remove(struct platform_device *pdev) +{ + struct mtk_keypad *keypad = platform_get_drvdata(pdev); + + tasklet_kill(&keypad->tasklet); + wakeup_source_unregister(keypad->suspend_lock); + input_unregister_device(keypad->input_dev); + clk_disable_unprepare(keypad->clk); + + return 0; +} + +static const struct of_device_id kpd_of_match[] = { + {.compatible = "mediatek,mt6779-keypad"}, + {.compatible = "mediatek,kp"}, + {}, +}; + +static struct platform_driver kpd_pdrv = { + .probe = kpd_pdrv_probe, + .remove = kpd_pdrv_remove, + .driver = { + .name = KPD_NAME, + .of_match_table = kpd_of_match, + }, +}; + +module_platform_driver(kpd_pdrv); + +MODULE_AUTHOR("Mediatek Corporation"); +MODULE_DESCRIPTION("MTK Keypad (KPD) Driver"); +MODULE_LICENSE("GPL"); -- 2.18.0 _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek