From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) (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 768388BE7; Sat, 20 Apr 2024 01:19:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=60.244.123.138 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713575981; cv=none; b=J9MMSRYoK9p6VZOVOPBYjbxnqa+jEbquApyY352qcjTNKqBdSYPl/wWKRve31pJunkQeFqplZAqFBAw+S60tHOrsuQAyRBiWT1heNxv83xKxRXvwIUeNcj5w3g37QsRwnB3iuwFpMbyYhgH3LIJ0cEPKwEurJCsps006ex+t9B0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713575981; c=relaxed/simple; bh=ZLYxuV6QytFHJ7wDV3GYjL/7KvyCTm29dczZ1L6mIF4=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=TScVuvcEIFsY7EsFqlQhNEkF3otDjRsqg2Xfa6sUGxQIW0FlXHTCDa3AAa+EUxgGJIYUZQVqktDanPKaw1XOz/z01HDsHt2z+JHQ2tdjeOzyAhn5VlzyEWIBsXZmdtaJhTjMfon2NZksYfTyfjJjct6x6JXvbydNVPlvdHjxun4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com; spf=pass smtp.mailfrom=mediatek.com; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b=tlJsrA3T; arc=none smtp.client-ip=60.244.123.138 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mediatek.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="tlJsrA3T" X-UUID: 0d20b006feb411eeb8927bc1f75efef4-20240420 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=uda2cqb2pFcyGcNrX4MtEfFo+dnCU7oaH84WCV1M28E=; b=tlJsrA3TzdCLQK/AlXD8dHU6uZOoQegWHwrYAuobovdlwekODV34lB36V0FXPZjkPw2SQhILpgkvtfOYg1K9O72McJBsu0RdbthMbYYlp0kiuzp1JTnvG0go52OLmNuwNAsWtheZzwC6fl7yQIDdssU9PbY5oP505KCeVqSH8LM=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.38,REQID:9b4ddcd0-a291-421a-9f52-233a8a11e8e4,IP:0,U RL:0,TC:0,Content:-25,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:-25 X-CID-META: VersionHash:82c5f88,CLOUDID:508e21fb-ed05-4274-9204-014369d201e8,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES:1, SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: 0d20b006feb411eeb8927bc1f75efef4-20240420 Received: from mtkmbs14n1.mediatek.inc [(172.21.101.75)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 275465166; Sat, 20 Apr 2024 09:19:36 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs13n2.mediatek.inc (172.21.101.108) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Sat, 20 Apr 2024 09:19:34 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Sat, 20 Apr 2024 09:19:33 +0800 From: Zhi Mao To: Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley CC: Matthias Brugger , AngeloGioacchino Del Regno , Zhi Mao , Philipp Zabel , Laurent Pinchart , Heiko Stuebner , Sakari Ailus , Hans Verkuil , Hans de Goede , Tomi Valkeinen , Alain Volmat , Paul Elder , Mehdi Djait , Andy Shevchenko , Bingbu Cao , , , , , , , , , <10572168@qq.com> Subject: [PATCH v1 2/2] media: i2c: Add GT97xx VCM driver Date: Sat, 20 Apr 2024 09:18:40 +0800 Message-ID: <20240420011840.23148-3-zhi.mao@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240420011840.23148-1-zhi.mao@mediatek.com> References: <20240420011840.23148-1-zhi.mao@mediatek.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-MTK: N Add a V4L2 sub-device driver for Giantec GT97xx VCM. Signed-off-by: Zhi Mao --- drivers/media/i2c/Kconfig | 13 ++ drivers/media/i2c/Makefile | 1 + drivers/media/i2c/gt97xx.c | 436 +++++++++++++++++++++++++++++++++++++ 3 files changed, 450 insertions(+) create mode 100644 drivers/media/i2c/gt97xx.c diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index 56f276b920ab..fcb330cebfe0 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -759,6 +759,19 @@ config VIDEO_DW9807_VCM capability. This is designed for linear control of voice coil motors, controlled via I2C serial interface. +config VIDEO_GT97XX + tristate "GT97xx lens voice coil support" + depends on I2C && VIDEO_DEV + select MEDIA_CONTROLLER + select VIDEO_V4L2_SUBDEV_API + select V4L2_FWNODE + select V4L2_CCI_I2C + help + This is a driver for the GT97xx camera lens voice coil. + GT97xx is a 10 bit DAC with 100mA output current sink + capability. It is designed for linear control of + voice coil motors, controlled via I2C serial interface. + endmenu menu "Flash devices" diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile index dfbe6448b549..af36a7aa3d12 100644 --- a/drivers/media/i2c/Makefile +++ b/drivers/media/i2c/Makefile @@ -39,6 +39,7 @@ obj-$(CONFIG_VIDEO_DW9807_VCM) += dw9807-vcm.o obj-$(CONFIG_VIDEO_ET8EK8) += et8ek8/ obj-$(CONFIG_VIDEO_GC0308) += gc0308.o obj-$(CONFIG_VIDEO_GC2145) += gc2145.o +obj-$(CONFIG_VIDEO_GT97XX) += gt97xx.o obj-$(CONFIG_VIDEO_HI556) += hi556.o obj-$(CONFIG_VIDEO_HI846) += hi846.o obj-$(CONFIG_VIDEO_HI847) += hi847.o diff --git a/drivers/media/i2c/gt97xx.c b/drivers/media/i2c/gt97xx.c new file mode 100644 index 000000000000..ccae190ffba6 --- /dev/null +++ b/drivers/media/i2c/gt97xx.c @@ -0,0 +1,436 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Driver for Giantec gt97xx VCM lens device + * + * Copyright 2024 MediaTek + * + * Zhi Mao + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +/* gt97xx chip info register and name */ +#define GT97XX_IC_INFO_REG CCI_REG8(0x00) +#define GT9768_ID 0xE9 +#define GT9769_ID 0xE1 +#define GT97XX_NAME "gt97xx" + +/* + * Ring control and Power control register + * Bit[1] RING_EN + * 0: Direct mode + * 1: AAC mode (ringing control mode) + * Bit[0] PD + * 0: Normal operation mode + * 1: Power down mode + * requires waiting time after PD reset takes place. + */ +#define GT97XX_RING_PD_CONTROL_REG CCI_REG8(0x02) +#define GT97XX_PD_MODE_OFF 0x00 +#define GT97XX_PD_MODE_EN BIT(0) +#define GT97XX_AAC_MODE_EN BIT(1) + +/* + * DAC is a 10bit address to control the VCM position. + * DAC_MSB: D[9:8] (ADD: 0x03) + * DAC_LSB: D[7:0] (ADD: 0x04) + */ +#define GT97XX_DAC_ADDR_REG CCI_REG16(0x03) + +#define GT97XX_MOVE_STEPS 16 +#define GT97XX_MAX_FOCUS_POS (BIT(10) - 1) + +#define GT97XX_SLEEP_US (1 * USEC_PER_MSEC) + +enum vcm_giantec_reg_desc { + GT_IC_INFO_REG, + GT_RING_PD_CONTROL_REG, + GT_DAC_ADDR_REG, + GT_MAX_REG +}; + +struct vcm_giantec_of_data { + unsigned int id; + unsigned int regs[GT_MAX_REG]; +}; + +static const char *const gt97xx_supply_names[] = { + "vin", + "vdd", +}; + +/* gt97xx device structure */ +struct gt97xx { + struct v4l2_subdev sd; + + struct regulator_bulk_data supplies[ARRAY_SIZE(gt97xx_supply_names)]; + + struct v4l2_ctrl_handler ctrls; + struct v4l2_ctrl *focus; + + struct regmap *regmap; + + const struct vcm_giantec_of_data *chip; +}; + +static inline struct gt97xx *sd_to_gt97xx(struct v4l2_subdev *subdev) +{ + return container_of(subdev, struct gt97xx, sd); +} + +struct regval_list { + u8 reg_num; + u8 value; +}; + +static int gt97xx_set_dac(struct gt97xx *gt97xx, u16 val) +{ + /* Write VCM position to registers */ + return cci_write(gt97xx->regmap, + gt97xx->chip->regs[GT_DAC_ADDR_REG], val, NULL); +} + +static int gt97xx_identify_module(struct gt97xx *gt97xx) +{ + int ret; + u64 ic_id; + struct i2c_client *client = v4l2_get_subdevdata(>97xx->sd); + + ret = cci_read(gt97xx->regmap, gt97xx->chip->regs[GT_IC_INFO_REG], + &ic_id, NULL); + if (ret < 0) + return ret; + + if (ic_id != gt97xx->chip->id) { + dev_err(&client->dev, "chip id mismatch: 0x%x!=0x%llx", + gt97xx->chip->id, ic_id); + return -1; + } + + return 0; +} + +static int gt97xx_init(struct gt97xx *gt97xx) +{ + int ret, val; + + ret = gt97xx_identify_module(gt97xx); + if (ret < 0) + return ret; + + /* Reset PD_CONTROL */ + ret = cci_write(gt97xx->regmap, + gt97xx->chip->regs[GT_RING_PD_CONTROL_REG], + GT97XX_PD_MODE_OFF, NULL); + if (ret < 0) + return ret; + + /* Need waiting delay time after PD reset */ + fsleep(GT97XX_SLEEP_US); + + /* Enable ACC mode */ + ret = cci_write(gt97xx->regmap, + gt97xx->chip->regs[GT_RING_PD_CONTROL_REG], + GT97XX_AAC_MODE_EN, NULL); + if (ret < 0) + return ret; + + for (val = gt97xx->focus->val % GT97XX_MOVE_STEPS; + val <= gt97xx->focus->val; val += GT97XX_MOVE_STEPS) { + ret = gt97xx_set_dac(gt97xx, val); + if (ret) + return ret; + + fsleep(GT97XX_SLEEP_US); + } + + return 0; +} + +static int gt97xx_release(struct gt97xx *gt97xx) +{ + int ret, val; + + val = round_down(gt97xx->focus->val, GT97XX_MOVE_STEPS); + for (; val >= 0; val -= GT97XX_MOVE_STEPS) { + ret = gt97xx_set_dac(gt97xx, val); + if (ret) + return ret; + + fsleep(GT97XX_SLEEP_US); + } + + return 0; +} + +static int gt97xx_power_on(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct gt97xx *gt97xx = sd_to_gt97xx(sd); + int ret; + + ret = regulator_bulk_enable(ARRAY_SIZE(gt97xx_supply_names), + gt97xx->supplies); + if (ret < 0) + dev_err(dev, "failed to enable regulators\n"); + + return ret; +} + +static int gt97xx_power_off(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct gt97xx *gt97xx = sd_to_gt97xx(sd); + int ret; + + ret = regulator_bulk_disable(ARRAY_SIZE(gt97xx_supply_names), + gt97xx->supplies); + if (ret < 0) + dev_err(dev, "failed to disable regulators\n"); + + return ret; +} + +static int gt97xx_runtime_suspend(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct gt97xx *gt97xx = sd_to_gt97xx(sd); + + gt97xx_release(gt97xx); + gt97xx_power_off(dev); + + return 0; +} + +static int gt97xx_runtime_resume(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct gt97xx *gt97xx = sd_to_gt97xx(sd); + int ret; + + ret = gt97xx_power_on(dev); + if (ret < 0) { + dev_err(dev, "failed to power_on\n"); + return ret; + } + + /* Need waited before sending I2C commands after power-up */ + fsleep(GT97XX_SLEEP_US); + + ret = gt97xx_init(gt97xx); + if (ret < 0) + goto disable_power; + + return 0; + +disable_power: + gt97xx_power_off(dev); + + return ret; +} + +static int gt97xx_set_ctrl(struct v4l2_ctrl *ctrl) +{ + struct gt97xx *gt97xx = + container_of(ctrl->handler, struct gt97xx, ctrls); + + if (ctrl->id == V4L2_CID_FOCUS_ABSOLUTE) + return gt97xx_set_dac(gt97xx, ctrl->val); + + return 0; +} + +static const struct v4l2_ctrl_ops gt97xx_ctrl_ops = { + .s_ctrl = gt97xx_set_ctrl, +}; + +static int gt97xx_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + return pm_runtime_resume_and_get(sd->dev); +} + +static int gt97xx_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + return pm_runtime_put(sd->dev); +} + +static const struct v4l2_subdev_internal_ops gt97xx_int_ops = { + .open = gt97xx_open, + .close = gt97xx_close, +}; + +static const struct v4l2_subdev_core_ops gt97xx_core_ops = { + .subscribe_event = v4l2_ctrl_subdev_subscribe_event, + .unsubscribe_event = v4l2_event_subdev_unsubscribe, +}; + +static const struct v4l2_subdev_ops gt97xx_ops = { + .core = >97xx_core_ops, +}; + +static int gt97xx_init_controls(struct gt97xx *gt97xx) +{ + struct v4l2_ctrl_handler *hdl = >97xx->ctrls; + const struct v4l2_ctrl_ops *ops = >97xx_ctrl_ops; + + v4l2_ctrl_handler_init(hdl, 1); + + gt97xx->focus = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FOCUS_ABSOLUTE, 0, + GT97XX_MAX_FOCUS_POS, + 1, 0); + + if (hdl->error) + return hdl->error; + + gt97xx->sd.ctrl_handler = hdl; + + return 0; +} + +static int gt97xx_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct gt97xx *gt97xx; + unsigned int i; + int ret; + + gt97xx = devm_kzalloc(dev, sizeof(*gt97xx), GFP_KERNEL); + if (!gt97xx) + return -ENOMEM; + + gt97xx->regmap = devm_cci_regmap_init_i2c(client, 8); + if (IS_ERR(gt97xx->regmap)) + return dev_err_probe(dev, PTR_ERR(gt97xx->regmap), + "failed to init CCI\n"); + + /* Initialize subdev */ + v4l2_i2c_subdev_init(>97xx->sd, client, >97xx_ops); + + gt97xx->chip = device_get_match_data(dev); + + for (i = 0; i < ARRAY_SIZE(gt97xx_supply_names); i++) + gt97xx->supplies[i].supply = gt97xx_supply_names[i]; + + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(gt97xx_supply_names), + gt97xx->supplies); + if (ret < 0) + return dev_err_probe(dev, ret, + "failed to get regulators\n"); + + /* Initialize controls */ + ret = gt97xx_init_controls(gt97xx); + if (ret) + goto err_free_handler; + + /* Initialize subdev */ + gt97xx->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + gt97xx->sd.internal_ops = >97xx_int_ops; + gt97xx->sd.entity.function = MEDIA_ENT_F_LENS; + + ret = media_entity_pads_init(>97xx->sd.entity, 0, NULL); + if (ret < 0) + goto err_free_handler; + + /* Power on and initialize hardware */ + ret = gt97xx_runtime_resume(dev); + if (ret < 0) { + dev_err_probe(dev, ret, "failed to power on\n"); + goto err_clean_entity; + } + + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + pm_runtime_set_autosuspend_delay(dev, 1000); + pm_runtime_use_autosuspend(dev); + pm_runtime_idle(dev); + + ret = v4l2_async_register_subdev(>97xx->sd); + if (ret < 0) { + dev_err_probe(dev, ret, "failed to register V4L2 subdev\n"); + goto err_power_off; + } + + return 0; + +err_power_off: + pm_runtime_disable(dev); +err_clean_entity: + media_entity_cleanup(>97xx->sd.entity); +err_free_handler: + v4l2_ctrl_handler_free(>97xx->ctrls); + + return ret; +} + +static void gt97xx_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct gt97xx *gt97xx = sd_to_gt97xx(sd); + + v4l2_async_unregister_subdev(>97xx->sd); + v4l2_ctrl_handler_free(>97xx->ctrls); + media_entity_cleanup(>97xx->sd.entity); + pm_runtime_disable(&client->dev); + if (!pm_runtime_status_suspended(&client->dev)) + gt97xx_runtime_suspend(&client->dev); + pm_runtime_set_suspended(&client->dev); +} + +static DEFINE_RUNTIME_DEV_PM_OPS(gt97xx_pm_ops, + gt97xx_runtime_suspend, + gt97xx_runtime_resume, + NULL); + +static const struct vcm_giantec_of_data gt9768_data = { + .id = GT9768_ID, + .regs[GT_IC_INFO_REG] = GT97XX_IC_INFO_REG, + .regs[GT_RING_PD_CONTROL_REG] = GT97XX_RING_PD_CONTROL_REG, + .regs[GT_DAC_ADDR_REG] = GT97XX_DAC_ADDR_REG, +}; + +static const struct vcm_giantec_of_data gt9769_data = { + .id = GT9769_ID, + .regs[GT_IC_INFO_REG] = GT97XX_IC_INFO_REG, + .regs[GT_RING_PD_CONTROL_REG] = GT97XX_RING_PD_CONTROL_REG, + .regs[GT_DAC_ADDR_REG] = GT97XX_DAC_ADDR_REG, +}; + +static const struct of_device_id gt97xx_of_table[] = { + { .compatible = "giantec,gt9768", .data = >9768_data }, + { .compatible = "giantec,gt9769", .data = >9769_data }, + {} +}; +MODULE_DEVICE_TABLE(of, gt97xx_of_table); + +static struct i2c_driver gt97xx_i2c_driver = { + .driver = { + .name = GT97XX_NAME, + .pm = pm_ptr(>97xx_pm_ops), + .of_match_table = gt97xx_of_table, + }, + .probe = gt97xx_probe, + .remove = gt97xx_remove, +}; +module_i2c_driver(gt97xx_i2c_driver); + +MODULE_AUTHOR("Zhi Mao "); +MODULE_DESCRIPTION("GT97xx VCM driver"); +MODULE_LICENSE("GPL"); -- 2.25.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EDE4AC4345F for ; Sat, 20 Apr 2024 01:21:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; 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Sat, 20 Apr 2024 09:19:34 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Sat, 20 Apr 2024 09:19:33 +0800 From: Zhi Mao To: Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley CC: Matthias Brugger , AngeloGioacchino Del Regno , Zhi Mao , Philipp Zabel , Laurent Pinchart , Heiko Stuebner , Sakari Ailus , Hans Verkuil , Hans de Goede , Tomi Valkeinen , Alain Volmat , Paul Elder , Mehdi Djait , Andy Shevchenko , Bingbu Cao , , , , , , , , , <10572168@qq.com> Subject: [PATCH v1 2/2] media: i2c: Add GT97xx VCM driver Date: Sat, 20 Apr 2024 09:18:40 +0800 Message-ID: <20240420011840.23148-3-zhi.mao@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240420011840.23148-1-zhi.mao@mediatek.com> References: <20240420011840.23148-1-zhi.mao@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-20240420_022139_228465_14C54A94 X-CRM114-Status: GOOD ( 25.71 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add a V4L2 sub-device driver for Giantec GT97xx VCM. Signed-off-by: Zhi Mao --- drivers/media/i2c/Kconfig | 13 ++ drivers/media/i2c/Makefile | 1 + drivers/media/i2c/gt97xx.c | 436 +++++++++++++++++++++++++++++++++++++ 3 files changed, 450 insertions(+) create mode 100644 drivers/media/i2c/gt97xx.c diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index 56f276b920ab..fcb330cebfe0 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -759,6 +759,19 @@ config VIDEO_DW9807_VCM capability. This is designed for linear control of voice coil motors, controlled via I2C serial interface. +config VIDEO_GT97XX + tristate "GT97xx lens voice coil support" + depends on I2C && VIDEO_DEV + select MEDIA_CONTROLLER + select VIDEO_V4L2_SUBDEV_API + select V4L2_FWNODE + select V4L2_CCI_I2C + help + This is a driver for the GT97xx camera lens voice coil. + GT97xx is a 10 bit DAC with 100mA output current sink + capability. It is designed for linear control of + voice coil motors, controlled via I2C serial interface. + endmenu menu "Flash devices" diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile index dfbe6448b549..af36a7aa3d12 100644 --- a/drivers/media/i2c/Makefile +++ b/drivers/media/i2c/Makefile @@ -39,6 +39,7 @@ obj-$(CONFIG_VIDEO_DW9807_VCM) += dw9807-vcm.o obj-$(CONFIG_VIDEO_ET8EK8) += et8ek8/ obj-$(CONFIG_VIDEO_GC0308) += gc0308.o obj-$(CONFIG_VIDEO_GC2145) += gc2145.o +obj-$(CONFIG_VIDEO_GT97XX) += gt97xx.o obj-$(CONFIG_VIDEO_HI556) += hi556.o obj-$(CONFIG_VIDEO_HI846) += hi846.o obj-$(CONFIG_VIDEO_HI847) += hi847.o diff --git a/drivers/media/i2c/gt97xx.c b/drivers/media/i2c/gt97xx.c new file mode 100644 index 000000000000..ccae190ffba6 --- /dev/null +++ b/drivers/media/i2c/gt97xx.c @@ -0,0 +1,436 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Driver for Giantec gt97xx VCM lens device + * + * Copyright 2024 MediaTek + * + * Zhi Mao + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +/* gt97xx chip info register and name */ +#define GT97XX_IC_INFO_REG CCI_REG8(0x00) +#define GT9768_ID 0xE9 +#define GT9769_ID 0xE1 +#define GT97XX_NAME "gt97xx" + +/* + * Ring control and Power control register + * Bit[1] RING_EN + * 0: Direct mode + * 1: AAC mode (ringing control mode) + * Bit[0] PD + * 0: Normal operation mode + * 1: Power down mode + * requires waiting time after PD reset takes place. + */ +#define GT97XX_RING_PD_CONTROL_REG CCI_REG8(0x02) +#define GT97XX_PD_MODE_OFF 0x00 +#define GT97XX_PD_MODE_EN BIT(0) +#define GT97XX_AAC_MODE_EN BIT(1) + +/* + * DAC is a 10bit address to control the VCM position. + * DAC_MSB: D[9:8] (ADD: 0x03) + * DAC_LSB: D[7:0] (ADD: 0x04) + */ +#define GT97XX_DAC_ADDR_REG CCI_REG16(0x03) + +#define GT97XX_MOVE_STEPS 16 +#define GT97XX_MAX_FOCUS_POS (BIT(10) - 1) + +#define GT97XX_SLEEP_US (1 * USEC_PER_MSEC) + +enum vcm_giantec_reg_desc { + GT_IC_INFO_REG, + GT_RING_PD_CONTROL_REG, + GT_DAC_ADDR_REG, + GT_MAX_REG +}; + +struct vcm_giantec_of_data { + unsigned int id; + unsigned int regs[GT_MAX_REG]; +}; + +static const char *const gt97xx_supply_names[] = { + "vin", + "vdd", +}; + +/* gt97xx device structure */ +struct gt97xx { + struct v4l2_subdev sd; + + struct regulator_bulk_data supplies[ARRAY_SIZE(gt97xx_supply_names)]; + + struct v4l2_ctrl_handler ctrls; + struct v4l2_ctrl *focus; + + struct regmap *regmap; + + const struct vcm_giantec_of_data *chip; +}; + +static inline struct gt97xx *sd_to_gt97xx(struct v4l2_subdev *subdev) +{ + return container_of(subdev, struct gt97xx, sd); +} + +struct regval_list { + u8 reg_num; + u8 value; +}; + +static int gt97xx_set_dac(struct gt97xx *gt97xx, u16 val) +{ + /* Write VCM position to registers */ + return cci_write(gt97xx->regmap, + gt97xx->chip->regs[GT_DAC_ADDR_REG], val, NULL); +} + +static int gt97xx_identify_module(struct gt97xx *gt97xx) +{ + int ret; + u64 ic_id; + struct i2c_client *client = v4l2_get_subdevdata(>97xx->sd); + + ret = cci_read(gt97xx->regmap, gt97xx->chip->regs[GT_IC_INFO_REG], + &ic_id, NULL); + if (ret < 0) + return ret; + + if (ic_id != gt97xx->chip->id) { + dev_err(&client->dev, "chip id mismatch: 0x%x!=0x%llx", + gt97xx->chip->id, ic_id); + return -1; + } + + return 0; +} + +static int gt97xx_init(struct gt97xx *gt97xx) +{ + int ret, val; + + ret = gt97xx_identify_module(gt97xx); + if (ret < 0) + return ret; + + /* Reset PD_CONTROL */ + ret = cci_write(gt97xx->regmap, + gt97xx->chip->regs[GT_RING_PD_CONTROL_REG], + GT97XX_PD_MODE_OFF, NULL); + if (ret < 0) + return ret; + + /* Need waiting delay time after PD reset */ + fsleep(GT97XX_SLEEP_US); + + /* Enable ACC mode */ + ret = cci_write(gt97xx->regmap, + gt97xx->chip->regs[GT_RING_PD_CONTROL_REG], + GT97XX_AAC_MODE_EN, NULL); + if (ret < 0) + return ret; + + for (val = gt97xx->focus->val % GT97XX_MOVE_STEPS; + val <= gt97xx->focus->val; val += GT97XX_MOVE_STEPS) { + ret = gt97xx_set_dac(gt97xx, val); + if (ret) + return ret; + + fsleep(GT97XX_SLEEP_US); + } + + return 0; +} + +static int gt97xx_release(struct gt97xx *gt97xx) +{ + int ret, val; + + val = round_down(gt97xx->focus->val, GT97XX_MOVE_STEPS); + for (; val >= 0; val -= GT97XX_MOVE_STEPS) { + ret = gt97xx_set_dac(gt97xx, val); + if (ret) + return ret; + + fsleep(GT97XX_SLEEP_US); + } + + return 0; +} + +static int gt97xx_power_on(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct gt97xx *gt97xx = sd_to_gt97xx(sd); + int ret; + + ret = regulator_bulk_enable(ARRAY_SIZE(gt97xx_supply_names), + gt97xx->supplies); + if (ret < 0) + dev_err(dev, "failed to enable regulators\n"); + + return ret; +} + +static int gt97xx_power_off(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct gt97xx *gt97xx = sd_to_gt97xx(sd); + int ret; + + ret = regulator_bulk_disable(ARRAY_SIZE(gt97xx_supply_names), + gt97xx->supplies); + if (ret < 0) + dev_err(dev, "failed to disable regulators\n"); + + return ret; +} + +static int gt97xx_runtime_suspend(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct gt97xx *gt97xx = sd_to_gt97xx(sd); + + gt97xx_release(gt97xx); + gt97xx_power_off(dev); + + return 0; +} + +static int gt97xx_runtime_resume(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct gt97xx *gt97xx = sd_to_gt97xx(sd); + int ret; + + ret = gt97xx_power_on(dev); + if (ret < 0) { + dev_err(dev, "failed to power_on\n"); + return ret; + } + + /* Need waited before sending I2C commands after power-up */ + fsleep(GT97XX_SLEEP_US); + + ret = gt97xx_init(gt97xx); + if (ret < 0) + goto disable_power; + + return 0; + +disable_power: + gt97xx_power_off(dev); + + return ret; +} + +static int gt97xx_set_ctrl(struct v4l2_ctrl *ctrl) +{ + struct gt97xx *gt97xx = + container_of(ctrl->handler, struct gt97xx, ctrls); + + if (ctrl->id == V4L2_CID_FOCUS_ABSOLUTE) + return gt97xx_set_dac(gt97xx, ctrl->val); + + return 0; +} + +static const struct v4l2_ctrl_ops gt97xx_ctrl_ops = { + .s_ctrl = gt97xx_set_ctrl, +}; + +static int gt97xx_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + return pm_runtime_resume_and_get(sd->dev); +} + +static int gt97xx_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + return pm_runtime_put(sd->dev); +} + +static const struct v4l2_subdev_internal_ops gt97xx_int_ops = { + .open = gt97xx_open, + .close = gt97xx_close, +}; + +static const struct v4l2_subdev_core_ops gt97xx_core_ops = { + .subscribe_event = v4l2_ctrl_subdev_subscribe_event, + .unsubscribe_event = v4l2_event_subdev_unsubscribe, +}; + +static const struct v4l2_subdev_ops gt97xx_ops = { + .core = >97xx_core_ops, +}; + +static int gt97xx_init_controls(struct gt97xx *gt97xx) +{ + struct v4l2_ctrl_handler *hdl = >97xx->ctrls; + const struct v4l2_ctrl_ops *ops = >97xx_ctrl_ops; + + v4l2_ctrl_handler_init(hdl, 1); + + gt97xx->focus = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FOCUS_ABSOLUTE, 0, + GT97XX_MAX_FOCUS_POS, + 1, 0); + + if (hdl->error) + return hdl->error; + + gt97xx->sd.ctrl_handler = hdl; + + return 0; +} + +static int gt97xx_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct gt97xx *gt97xx; + unsigned int i; + int ret; + + gt97xx = devm_kzalloc(dev, sizeof(*gt97xx), GFP_KERNEL); + if (!gt97xx) + return -ENOMEM; + + gt97xx->regmap = devm_cci_regmap_init_i2c(client, 8); + if (IS_ERR(gt97xx->regmap)) + return dev_err_probe(dev, PTR_ERR(gt97xx->regmap), + "failed to init CCI\n"); + + /* Initialize subdev */ + v4l2_i2c_subdev_init(>97xx->sd, client, >97xx_ops); + + gt97xx->chip = device_get_match_data(dev); + + for (i = 0; i < ARRAY_SIZE(gt97xx_supply_names); i++) + gt97xx->supplies[i].supply = gt97xx_supply_names[i]; + + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(gt97xx_supply_names), + gt97xx->supplies); + if (ret < 0) + return dev_err_probe(dev, ret, + "failed to get regulators\n"); + + /* Initialize controls */ + ret = gt97xx_init_controls(gt97xx); + if (ret) + goto err_free_handler; + + /* Initialize subdev */ + gt97xx->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + gt97xx->sd.internal_ops = >97xx_int_ops; + gt97xx->sd.entity.function = MEDIA_ENT_F_LENS; + + ret = media_entity_pads_init(>97xx->sd.entity, 0, NULL); + if (ret < 0) + goto err_free_handler; + + /* Power on and initialize hardware */ + ret = gt97xx_runtime_resume(dev); + if (ret < 0) { + dev_err_probe(dev, ret, "failed to power on\n"); + goto err_clean_entity; + } + + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + pm_runtime_set_autosuspend_delay(dev, 1000); + pm_runtime_use_autosuspend(dev); + pm_runtime_idle(dev); + + ret = v4l2_async_register_subdev(>97xx->sd); + if (ret < 0) { + dev_err_probe(dev, ret, "failed to register V4L2 subdev\n"); + goto err_power_off; + } + + return 0; + +err_power_off: + pm_runtime_disable(dev); +err_clean_entity: + media_entity_cleanup(>97xx->sd.entity); +err_free_handler: + v4l2_ctrl_handler_free(>97xx->ctrls); + + return ret; +} + +static void gt97xx_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct gt97xx *gt97xx = sd_to_gt97xx(sd); + + v4l2_async_unregister_subdev(>97xx->sd); + v4l2_ctrl_handler_free(>97xx->ctrls); + media_entity_cleanup(>97xx->sd.entity); + pm_runtime_disable(&client->dev); + if (!pm_runtime_status_suspended(&client->dev)) + gt97xx_runtime_suspend(&client->dev); + pm_runtime_set_suspended(&client->dev); +} + +static DEFINE_RUNTIME_DEV_PM_OPS(gt97xx_pm_ops, + gt97xx_runtime_suspend, + gt97xx_runtime_resume, + NULL); + +static const struct vcm_giantec_of_data gt9768_data = { + .id = GT9768_ID, + .regs[GT_IC_INFO_REG] = GT97XX_IC_INFO_REG, + .regs[GT_RING_PD_CONTROL_REG] = GT97XX_RING_PD_CONTROL_REG, + .regs[GT_DAC_ADDR_REG] = GT97XX_DAC_ADDR_REG, +}; + +static const struct vcm_giantec_of_data gt9769_data = { + .id = GT9769_ID, + .regs[GT_IC_INFO_REG] = GT97XX_IC_INFO_REG, + .regs[GT_RING_PD_CONTROL_REG] = GT97XX_RING_PD_CONTROL_REG, + .regs[GT_DAC_ADDR_REG] = GT97XX_DAC_ADDR_REG, +}; + +static const struct of_device_id gt97xx_of_table[] = { + { .compatible = "giantec,gt9768", .data = >9768_data }, + { .compatible = "giantec,gt9769", .data = >9769_data }, + {} +}; +MODULE_DEVICE_TABLE(of, gt97xx_of_table); + +static struct i2c_driver gt97xx_i2c_driver = { + .driver = { + .name = GT97XX_NAME, + .pm = pm_ptr(>97xx_pm_ops), + .of_match_table = gt97xx_of_table, + }, + .probe = gt97xx_probe, + .remove = gt97xx_remove, +}; +module_i2c_driver(gt97xx_i2c_driver); + +MODULE_AUTHOR("Zhi Mao "); +MODULE_DESCRIPTION("GT97xx VCM driver"); +MODULE_LICENSE("GPL"); -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel