From patchwork Tue Sep 3 06:57:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keke Li via B4 Relay X-Patchwork-Id: 13788115 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 EE5BC1D6193; Tue, 3 Sep 2024 06:57:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725346638; cv=none; b=NeR46aWOEgK9MoMMILy0aZUvf9TIF8hJdXmB1VV31vIOCm4XZsThqZmALx8eqDmQXSNlo5PxbVOowcvO8+wwRKGTKvz5YkhVJw/867A6RDOrcAZyXXg86BZZFFWQacYQxyQgwduH+/u8C2ekg2n8qmjh7FzoEQHzRGE33Ne7fF8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725346638; c=relaxed/simple; bh=ZdxS9p9jTFPxnS7Uz2JLDdNEvZ0e1DcjltQPRSJkDe4=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=VN1H8dic8cjZZtKlMqpsApJrNz6q4BZlCMiA/W1Qlc1U+QvMSvOYeoOkaTshxGl8PhNJQqId+wm7R21S1PJ4L3y0TnzGxE7UraP19nfj43dhDLXQGw9VWDkWiGTTNOLidwKGBP7NPrVkdQFr9HMhZvkXZVBrlrEoJPxnPNAkvkY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=A2NfhT1D; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="A2NfhT1D" Received: by smtp.kernel.org (Postfix) with ESMTPS id 9B615C4CECB; Tue, 3 Sep 2024 06:57:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1725346637; bh=ZdxS9p9jTFPxnS7Uz2JLDdNEvZ0e1DcjltQPRSJkDe4=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=A2NfhT1DrRFG1M66lehf6pziVWjWdOpdYu995pJKr6aqQTMuRiTFkiuhCOHGGUU9l q7isH35sWXnpM/Jp2ryfo2ve0SqYo5Zjg3L2A1ziSEVfJff/MnJRGDVYQKuYsdQDcW riGQSDKCxGetYCFM/DDZvCFCxU7lSXSdXnSDU5LG9ZcIngOT6XYasyKSS9Nlgzll9q 8+iptdBNQ+07DpEwd/niXxbntRTlhb9qWwoPir1wJsjzVwJ1hVPVm5PqDvh6hsM8at hXEUmakZzq8NqXa5bxW+m/m2fYIuTFtg2CjDF13REb5k8y5iChbf67Jl7nvMPosqFr Kf5FChTmF+VWA== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8A16DCD3431; Tue, 3 Sep 2024 06:57:17 +0000 (UTC) From: Keke Li via B4 Relay Date: Tue, 03 Sep 2024 14:57:06 +0800 Subject: [PATCH 2/9] media: platform: Add c3 mipi csi2 driver Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240903-c3isp-v1-2-8af0edcc13c8@amlogic.com> References: <20240903-c3isp-v1-0-8af0edcc13c8@amlogic.com> In-Reply-To: <20240903-c3isp-v1-0-8af0edcc13c8@amlogic.com> To: Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, kieran.bingham@ideasonboard.com, laurent.pinchart@ideasonboard.com, dan.scally@ideasonboard.com, Keke Li X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1725346629; l=31342; i=keke.li@amlogic.com; s=20240902; h=from:subject:message-id; bh=jhOXiX8y41sFAZnXpRoV5yCCzzXal+BR7DKmkMst2Gw=; b=Gb9BmFgX6HvMCbfZOw6W851h1AOLVGNvjHIly2sMMmmcHBuzM/y7FuikrqGzkvRIQwr6J8F3g JM9LOId5k44AHve4uH735ZBzjBBfmj6ZGjnPEranmhf3VmXeW3XRX4L X-Developer-Key: i=keke.li@amlogic.com; a=ed25519; pk=XxNPTsQ0YqMJLLekV456eoKV5gbSlxnViB1k1DhfRmU= X-Endpoint-Received: by B4 Relay for keke.li@amlogic.com/20240902 with auth_id=204 X-Original-From: Keke Li Reply-To: keke.li@amlogic.com From: Keke Li This driver is used to receive mipi data from image sensor. Signed-off-by: Keke Li --- MAINTAINERS | 7 + drivers/media/platform/amlogic/Kconfig | 1 + drivers/media/platform/amlogic/Makefile | 2 + .../media/platform/amlogic/c3-mipi-csi2/Kconfig | 16 + .../media/platform/amlogic/c3-mipi-csi2/Makefile | 3 + .../platform/amlogic/c3-mipi-csi2/c3-mipi-csi2.c | 940 +++++++++++++++++++++ 6 files changed, 969 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 97c4b798e65e..6077a0cb20c3 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4889,6 +4889,13 @@ S: Maintained F: Documentation/devicetree/bindings/net/can/st,stm32-bxcan.yaml F: drivers/net/can/bxcan.c +C3 MIPI CSI2 DRIVER FOR AMLOGIC +M: Keke Li +L: linux-media@vger.kernel.org +S: Maintained +F: Documentation/devicetree/bindings/media/amlogic,c3-mipi-csi2.yaml +F: drivers/media/platform/amlogic/c3-mipi-csi2/ + C-MEDIA CMI8788 DRIVER M: Clemens Ladisch L: alsa-devel@alsa-project.org (moderated for non-subscribers) diff --git a/drivers/media/platform/amlogic/Kconfig b/drivers/media/platform/amlogic/Kconfig index 5014957404e9..b7c2de14848b 100644 --- a/drivers/media/platform/amlogic/Kconfig +++ b/drivers/media/platform/amlogic/Kconfig @@ -2,4 +2,5 @@ comment "Amlogic media platform drivers" +source "drivers/media/platform/amlogic/c3-mipi-csi2/Kconfig" source "drivers/media/platform/amlogic/meson-ge2d/Kconfig" diff --git a/drivers/media/platform/amlogic/Makefile b/drivers/media/platform/amlogic/Makefile index d3cdb8fa4ddb..4f571ce5d13e 100644 --- a/drivers/media/platform/amlogic/Makefile +++ b/drivers/media/platform/amlogic/Makefile @@ -1,2 +1,4 @@ # SPDX-License-Identifier: GPL-2.0-only + +obj-y += c3-mipi-csi2/ obj-y += meson-ge2d/ diff --git a/drivers/media/platform/amlogic/c3-mipi-csi2/Kconfig b/drivers/media/platform/amlogic/c3-mipi-csi2/Kconfig new file mode 100644 index 000000000000..0d7b2e203273 --- /dev/null +++ b/drivers/media/platform/amlogic/c3-mipi-csi2/Kconfig @@ -0,0 +1,16 @@ +# SPDX-License-Identifier: GPL-2.0-only + +config VIDEO_C3_MIPI_CSI2 + tristate "Amlogic C3 MIPI CSI-2 receiver" + depends on ARCH_MESON || COMPILE_TEST + depends on VIDEO_DEV + depends on OF + select MEDIA_CONTROLLER + select V4L2_FWNODE + select VIDEO_V4L2_SUBDEV_API + help + Video4Linux2 driver for Amlogic C3 MIPI CSI-2 receiver. + C3 MIPI CSI-2 receiver is used to receive MIPI data from + image sensor. + + To compile this driver as a module choose m here. diff --git a/drivers/media/platform/amlogic/c3-mipi-csi2/Makefile b/drivers/media/platform/amlogic/c3-mipi-csi2/Makefile new file mode 100644 index 000000000000..cc08fc722bfd --- /dev/null +++ b/drivers/media/platform/amlogic/c3-mipi-csi2/Makefile @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0-only + +obj-$(CONFIG_VIDEO_C3_MIPI_CSI2) += c3-mipi-csi2.o diff --git a/drivers/media/platform/amlogic/c3-mipi-csi2/c3-mipi-csi2.c b/drivers/media/platform/amlogic/c3-mipi-csi2/c3-mipi-csi2.c new file mode 100644 index 000000000000..0c83e72dfb83 --- /dev/null +++ b/drivers/media/platform/amlogic/c3-mipi-csi2/c3-mipi-csi2.c @@ -0,0 +1,940 @@ +// SPDX-License-Identifier: (GPL-2.0-only OR MIT) +/* + * Copyright (C) 2024 Amlogic, Inc. All rights reserved + */ + +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +/* C3 CSI-2 submodule definition */ +enum { + SUBMD_APHY, + SUBMD_DPHY, + SUBMD_HOST, +}; + +#define CSI2_SUBMD_MASK GENMASK(17, 16) +#define CSI2_SUBMD_SHIFT 16 +#define CSI2_SUBMD(x) (((x) & (CSI2_SUBMD_MASK)) >> (CSI2_SUBMD_SHIFT)) +#define CSI2_REG_ADDR_MASK GENMASK(15, 0) +#define CSI2_REG_ADDR(x) ((x) & (CSI2_REG_ADDR_MASK)) +#define CSI2_REG_A(x) ((SUBMD_APHY << CSI2_SUBMD_SHIFT) | (x)) +#define CSI2_REG_D(x) ((SUBMD_DPHY << CSI2_SUBMD_SHIFT) | (x)) +#define CSI2_REG_H(x) ((SUBMD_HOST << CSI2_SUBMD_SHIFT) | (x)) + +#define MIPI_CSI2_CLOCK_NUM_MAX 3 +#define MIPI_CSI2_SUBDEV_NAME "mipi-csi2" + +/* C3 CSI-2 APHY register */ +#define MIPI_CSI_2M_PHY2_CNTL1 CSI2_REG_A(0x44) +#define MIPI_APHY_NORMAL_CNTL1 0x3f425C00 + +#define MIPI_CSI_2M_PHY2_CNTL2 CSI2_REG_A(0x48) +#define MIPI_APHY_4LANES_CNTL2 0x033a0000 +#define MIPI_APHY_NORMAL_CNTL2 0x333a0000 + +#define MIPI_CSI_2M_PHY2_CNTL3 CSI2_REG_A(0x4c) +#define MIPI_APHY_2LANES_CNTL3 0x03800000 + +/* C3 CSI-2 DPHY register */ +#define MIPI_PHY_CTRL CSI2_REG_D(0x00) +#define MIPI_DPHY_LANES_ENABLE 0x0 + +#define MIPI_PHY_CLK_LANE_CTRL CSI2_REG_D(0x04) +#define MIPI_DPHY_CLK_CONTINUE_MODE 0x3d8 + +#define MIPI_PHY_DATA_LANE_CTRL CSI2_REG_D(0x08) +#define MIPI_DPHY_LANE_CTRL_DISABLE 0x0 + +#define MIPI_PHY_DATA_LANE_CTRL1 CSI2_REG_D(0x0c) +#define MIPI_DPHY_INSERT_ERRESC BIT(0) +#define MIPI_DPHY_HS_SYNC_CHECK BIT(1) +#define MIPI_DPHY_FIVE_HS_PIPE GENMASK(6, 2) +#define MIPI_DPHY_FIVE_HS_PIPE_SHIFT 2 +#define MIPI_DPHY_DATA_PIPE_SELECT GENMASK(9, 7) +#define MIPI_DPHY_DATA_PIPE_SELECT_SHIFT 7 + +#define MIPI_PHY_TCLK_MISS CSI2_REG_D(0x10) +#define MIPI_DPHY_CLK_MISS 0x9 + +#define MIPI_PHY_TCLK_SETTLE CSI2_REG_D(0x14) +#define MIPI_DPHY_CLK_SETTLE 0x1F + +#define MIPI_PHY_THS_EXIT CSI2_REG_D(0x18) +#define MIPI_DPHY_HS_EXIT 0x8 + +#define MIPI_PHY_THS_SKIP CSI2_REG_D(0x1c) +#define MIPI_DPHY_HS_SKIP 0xa + +#define MIPI_PHY_THS_SETTLE CSI2_REG_D(0x20) +#define MIPI_PHY_TINIT CSI2_REG_D(0x24) +#define MIPI_DPHY_INIT_CYCLES 0x4e20 + +#define MIPI_PHY_TULPS_C CSI2_REG_D(0x28) +#define MIPI_DPHY_ULPS_CHECK_CYCLES 0x1000 + +#define MIPI_PHY_TULPS_S CSI2_REG_D(0x2c) +#define MIPI_DPHY_ULPS_START_CYCLES 0x100 + +#define MIPI_PHY_TMBIAS CSI2_REG_D(0x30) +#define MIPI_DPHY_MBIAS_CYCLES 0x100 + +#define MIPI_PHY_TLP_EN_W CSI2_REG_D(0x34) +#define MIPI_DPHY_ULPS_STOP_CYCLES 0xC + +#define MIPI_PHY_TLPOK CSI2_REG_D(0x38) +#define MIPI_DPHY_POWER_UP_CYCLES 0x100 + +#define MIPI_PHY_TWD_INIT CSI2_REG_D(0x3c) +#define MIPI_DPHY_INIT_WATCH_DOG 0x400000 + +#define MIPI_PHY_TWD_HS CSI2_REG_D(0x40) +#define MIPI_DPHY_HS_WATCH_DOG 0x400000 + +#define MIPI_PHY_MUX_CTRL0 CSI2_REG_D(0x284) +#define MIPI_DPHY_LANE3_SELECT GENMASK(3, 0) +#define MIPI_DPHY_LANE2_SELECT GENMASK(7, 4) +#define MIPI_DPHY_LANE2_SELECT_SHIFT 4 +#define MIPI_DPHY_LANE1_SELECT GENMASK(11, 8) +#define MIPI_DPHY_LANE1_SELECT_SHIFT 8 +#define MIPI_DPHY_LANE0_SELECT GENMASK(14, 12) + +#define MIPI_PHY_MUX_CTRL1 CSI2_REG_D(0x288) +#define MIPI_DPHY_LANE3_CTRL_SIGNAL GENMASK(3, 0) +#define MIPI_DPHY_LANE2_CTRL_SIGNAL GENMASK(7, 4) +#define MIPI_DPHY_LANE2_CTRL_SIGNAL_SHIFT 4 +#define MIPI_DPHY_LANE1_CTRL_SIGNAL GENMASK(11, 8) +#define MIPI_DPHY_LANE1_CTRL_SIGNAL_SHIFT 8 +#define MIPI_DPHY_LANE0_CTRL_SIGNAL GENMASK(14, 12) +#define MIPI_DPHY_CLK_SELECT BIT(17) + +/* C3 CSI-2 HOST register */ +#define CSI2_HOST_N_LANES CSI2_REG_H(0x04) +#define CSI2_HOST_CSI2_RESETN CSI2_REG_H(0x10) +#define CSI2_HOST_RESETN_DEFAULT 0x0 +#define CSI2_HOST_RESETN_RST_VALUE BIT(0) + +#define CSI2_HOST_MASK1 CSI2_REG_H(0x28) +#define CSI2_HOST_ERROR_MASK1 GENMASK(28, 0) + +#define MIPI_CSI2_MAX_WIDTH 2888 +#define MIPI_CSI2_MIN_WIDTH 160 +#define MIPI_CSI2_MAX_HEIGHT 2240 +#define MIPI_CSI2_MIN_HEIGHT 120 +#define MIPI_CSI2_DEFAULT_WIDTH 1920 +#define MIPI_CSI2_DEFAULT_HEIGHT 1080 +#define MIPI_CSI2_DEFAULT_FMT MEDIA_BUS_FMT_SRGGB10_1X10 + +/* C3 CSI-2 pad list */ +enum { + MIPI_CSI2_PAD_SINK, + MIPI_CSI2_PAD_SRC, + MIPI_CSI2_PAD_MAX +}; + +/** + * struct csi_info - MIPI CSI2 information + * + * @clock: array of MIPI CSI2 clock names + * @clock_rate: array of MIPI CSI2 clock rate + * @clock_num: actual clock number + */ +struct csi_info { + char *clock[MIPI_CSI2_CLOCK_NUM_MAX]; + u32 clock_rate[MIPI_CSI2_CLOCK_NUM_MAX]; + u32 clock_num; +}; + +/** + * struct csi_device - MIPI CSI2 platform device + * + * @dev: pointer to the struct device + * @aphy: MIPI CSI2 aphy register address + * @dphy: MIPI CSI2 dphy register address + * @host: MIPI CSI2 host register address + * @clock: array of MIPI CSI2 clocks + * @sd: MIPI CSI2 sub-device + * @pads: MIPI CSI2 sub-device pads + * @notifier: notifier to register on the v4l2-async API + * @src_sd: source sub-device + * @bus: MIPI CSI2 bus information + * @src_sd_pad: source sub-device pad + * @lock: protect MIPI CSI2 device + * @info: version-specific MIPI CSI2 information + */ +struct csi_device { + struct device *dev; + void __iomem *aphy; + void __iomem *dphy; + void __iomem *host; + struct clk_bulk_data clock[MIPI_CSI2_CLOCK_NUM_MAX]; + + struct v4l2_subdev sd; + struct media_pad pads[MIPI_CSI2_PAD_MAX]; + struct v4l2_async_notifier notifier; + struct v4l2_subdev *src_sd; + struct v4l2_mbus_config_mipi_csi2 bus; + + u16 src_sd_pad; + struct mutex lock; /* Protect csi device */ + const struct csi_info *info; +}; + +static const u32 c3_mipi_csi_formats[] = { + MEDIA_BUS_FMT_SBGGR10_1X10, + MEDIA_BUS_FMT_SGBRG10_1X10, + MEDIA_BUS_FMT_SGRBG10_1X10, + MEDIA_BUS_FMT_SRGGB10_1X10, + MEDIA_BUS_FMT_SBGGR12_1X12, + MEDIA_BUS_FMT_SGBRG12_1X12, + MEDIA_BUS_FMT_SGRBG12_1X12, + MEDIA_BUS_FMT_SRGGB12_1X12, +}; + +/* Hardware configuration */ + +static int c3_mipi_csi_write(struct csi_device *csi, u32 reg, u32 val) +{ + void __iomem *addr; + + switch (CSI2_SUBMD(reg)) { + case SUBMD_APHY: + addr = csi->aphy + CSI2_REG_ADDR(reg); + break; + case SUBMD_DPHY: + addr = csi->dphy + CSI2_REG_ADDR(reg); + break; + case SUBMD_HOST: + addr = csi->host + CSI2_REG_ADDR(reg); + break; + default: + return -EINVAL; + } + + writel(val, addr); + + return 0; +} + +static int c3_mipi_csi_update_bits(struct csi_device *csi, u32 reg, + u32 mask, u32 val) +{ + void __iomem *addr; + u32 orig, tmp; + + switch (CSI2_SUBMD(reg)) { + case SUBMD_APHY: + addr = csi->aphy + CSI2_REG_ADDR(reg); + break; + case SUBMD_DPHY: + addr = csi->dphy + CSI2_REG_ADDR(reg); + break; + case SUBMD_HOST: + addr = csi->host + CSI2_REG_ADDR(reg); + break; + default: + return -EINVAL; + } + + orig = readl(addr); + tmp = orig & ~mask; + tmp |= val & mask; + + if (tmp != orig) + writel(tmp, addr); + + return 0; +} + +static void c3_mipi_csi_cfg_aphy(struct csi_device *csi, u32 lanes) +{ + c3_mipi_csi_write(csi, MIPI_CSI_2M_PHY2_CNTL1, MIPI_APHY_NORMAL_CNTL1); + + if (lanes == 4) + c3_mipi_csi_write(csi, MIPI_CSI_2M_PHY2_CNTL2, MIPI_APHY_4LANES_CNTL2); + else + c3_mipi_csi_write(csi, MIPI_CSI_2M_PHY2_CNTL2, MIPI_APHY_NORMAL_CNTL2); + + if (lanes == 2) + c3_mipi_csi_write(csi, MIPI_CSI_2M_PHY2_CNTL3, MIPI_APHY_2LANES_CNTL3); +} + +static void c3_mipi_csi_2lanes_setting(struct csi_device *csi) +{ + /* Disable lane 2 and lane 3 */ + c3_mipi_csi_update_bits(csi, MIPI_PHY_MUX_CTRL0, + MIPI_DPHY_LANE3_SELECT, 0xf); + c3_mipi_csi_update_bits(csi, MIPI_PHY_MUX_CTRL0, + MIPI_DPHY_LANE2_SELECT, + 0xf << MIPI_DPHY_LANE2_SELECT_SHIFT); + /* Select analog data lane 1 */ + c3_mipi_csi_update_bits(csi, MIPI_PHY_MUX_CTRL0, + MIPI_DPHY_LANE1_SELECT, + 0x1 << MIPI_DPHY_LANE1_SELECT_SHIFT); + /* Select analog data lane 0 */ + c3_mipi_csi_update_bits(csi, MIPI_PHY_MUX_CTRL0, + MIPI_DPHY_LANE0_SELECT, 0x0); + + /* Disable lane 2 and lane 3 control signal */ + c3_mipi_csi_update_bits(csi, MIPI_PHY_MUX_CTRL1, + MIPI_DPHY_LANE3_CTRL_SIGNAL, 0xf); + c3_mipi_csi_update_bits(csi, MIPI_PHY_MUX_CTRL1, + MIPI_DPHY_LANE2_CTRL_SIGNAL, + 0xf << MIPI_DPHY_LANE2_CTRL_SIGNAL_SHIFT); + /* Select lane 1 signal */ + c3_mipi_csi_update_bits(csi, MIPI_PHY_MUX_CTRL1, + MIPI_DPHY_LANE1_CTRL_SIGNAL, + 0x1 << MIPI_DPHY_LANE1_CTRL_SIGNAL_SHIFT); + /* Select lane 0 signal */ + c3_mipi_csi_update_bits(csi, MIPI_PHY_MUX_CTRL1, + MIPI_DPHY_LANE0_CTRL_SIGNAL, 0x0); + /* Select input 0 as clock */ + c3_mipi_csi_update_bits(csi, MIPI_PHY_MUX_CTRL1, + MIPI_DPHY_CLK_SELECT, + MIPI_DPHY_CLK_SELECT); +} + +static void c3_mipi_csi_4lanes_setting(struct csi_device *csi) +{ + /* Select analog data lane 3 */ + c3_mipi_csi_update_bits(csi, MIPI_PHY_MUX_CTRL0, + MIPI_DPHY_LANE3_SELECT, 0x3); + /* Select analog data lane 2 */ + c3_mipi_csi_update_bits(csi, MIPI_PHY_MUX_CTRL0, + MIPI_DPHY_LANE2_SELECT, + 0x2 << MIPI_DPHY_LANE2_SELECT_SHIFT); + /* Select analog data lane 1 */ + c3_mipi_csi_update_bits(csi, MIPI_PHY_MUX_CTRL0, + MIPI_DPHY_LANE1_SELECT, + 0x1 << MIPI_DPHY_LANE1_SELECT_SHIFT); + /* Select analog data lane 0 */ + c3_mipi_csi_update_bits(csi, MIPI_PHY_MUX_CTRL0, + MIPI_DPHY_LANE0_SELECT, 0x0); + + /* Select lane 3 signal */ + c3_mipi_csi_update_bits(csi, MIPI_PHY_MUX_CTRL1, + MIPI_DPHY_LANE3_CTRL_SIGNAL, 0x3); + /* Select lane 2 signal */ + c3_mipi_csi_update_bits(csi, MIPI_PHY_MUX_CTRL1, + MIPI_DPHY_LANE2_CTRL_SIGNAL, + 0x2 << MIPI_DPHY_LANE2_CTRL_SIGNAL_SHIFT); + /* Select lane 1 signal */ + c3_mipi_csi_update_bits(csi, MIPI_PHY_MUX_CTRL1, + MIPI_DPHY_LANE1_CTRL_SIGNAL, + 0x1 << MIPI_DPHY_LANE1_CTRL_SIGNAL_SHIFT); + /* Select lane 0 signal */ + c3_mipi_csi_update_bits(csi, MIPI_PHY_MUX_CTRL1, + MIPI_DPHY_LANE0_CTRL_SIGNAL, 0x0); + /* Select input 0 as clock */ + c3_mipi_csi_update_bits(csi, MIPI_PHY_MUX_CTRL1, + MIPI_DPHY_CLK_SELECT, + MIPI_DPHY_CLK_SELECT); +} + +static void c3_mipi_csi_cfg_dphy(struct csi_device *csi, u32 lanes, s64 rate) +{ + u32 val; + u32 settle; + + /* Calculate the high speed settle */ + val = DIV_ROUND_UP(1000000000, rate); + settle = (16 * val + 230) / 10; + + c3_mipi_csi_write(csi, MIPI_PHY_CLK_LANE_CTRL, MIPI_DPHY_CLK_CONTINUE_MODE); + c3_mipi_csi_write(csi, MIPI_PHY_TCLK_MISS, MIPI_DPHY_CLK_MISS); + c3_mipi_csi_write(csi, MIPI_PHY_TCLK_SETTLE, MIPI_DPHY_CLK_SETTLE); + c3_mipi_csi_write(csi, MIPI_PHY_THS_EXIT, MIPI_DPHY_HS_EXIT); + c3_mipi_csi_write(csi, MIPI_PHY_THS_SKIP, MIPI_DPHY_HS_SKIP); + c3_mipi_csi_write(csi, MIPI_PHY_THS_SETTLE, settle); + c3_mipi_csi_write(csi, MIPI_PHY_TINIT, MIPI_DPHY_INIT_CYCLES); + c3_mipi_csi_write(csi, MIPI_PHY_TMBIAS, MIPI_DPHY_MBIAS_CYCLES); + c3_mipi_csi_write(csi, MIPI_PHY_TULPS_C, MIPI_DPHY_ULPS_CHECK_CYCLES); + c3_mipi_csi_write(csi, MIPI_PHY_TULPS_S, MIPI_DPHY_ULPS_START_CYCLES); + c3_mipi_csi_write(csi, MIPI_PHY_TLP_EN_W, MIPI_DPHY_ULPS_STOP_CYCLES); + c3_mipi_csi_write(csi, MIPI_PHY_TLPOK, MIPI_DPHY_POWER_UP_CYCLES); + c3_mipi_csi_write(csi, MIPI_PHY_TWD_INIT, MIPI_DPHY_INIT_WATCH_DOG); + c3_mipi_csi_write(csi, MIPI_PHY_TWD_HS, MIPI_DPHY_HS_WATCH_DOG); + c3_mipi_csi_write(csi, MIPI_PHY_DATA_LANE_CTRL, MIPI_DPHY_LANE_CTRL_DISABLE); + + c3_mipi_csi_update_bits(csi, MIPI_PHY_DATA_LANE_CTRL1, + MIPI_DPHY_INSERT_ERRESC, + MIPI_DPHY_INSERT_ERRESC); + c3_mipi_csi_update_bits(csi, MIPI_PHY_DATA_LANE_CTRL1, + MIPI_DPHY_HS_SYNC_CHECK, + MIPI_DPHY_HS_SYNC_CHECK); + /* + * Set 5 pipe lines to the same high speed. + * Each bit for one pipe line. + */ + c3_mipi_csi_update_bits(csi, MIPI_PHY_DATA_LANE_CTRL1, + MIPI_DPHY_FIVE_HS_PIPE, + 0x1f << MIPI_DPHY_FIVE_HS_PIPE_SHIFT); + + /* Output data with pipe line data. */ + c3_mipi_csi_update_bits(csi, MIPI_PHY_DATA_LANE_CTRL1, + MIPI_DPHY_DATA_PIPE_SELECT, + 0x3 << MIPI_DPHY_DATA_PIPE_SELECT_SHIFT); + if (lanes == 2) + c3_mipi_csi_2lanes_setting(csi); + else + c3_mipi_csi_4lanes_setting(csi); + + /* Enable digital data and clock lanes */ + c3_mipi_csi_write(csi, MIPI_PHY_CTRL, MIPI_DPHY_LANES_ENABLE); +} + +static void c3_mipi_csi_cfg_host(struct csi_device *csi, u32 lanes) +{ + /* Reset CSI-2 controller output */ + c3_mipi_csi_write(csi, CSI2_HOST_CSI2_RESETN, CSI2_HOST_RESETN_DEFAULT); + c3_mipi_csi_write(csi, CSI2_HOST_CSI2_RESETN, CSI2_HOST_RESETN_RST_VALUE); + + /* Set data lane number */ + c3_mipi_csi_write(csi, CSI2_HOST_N_LANES, lanes - 1); + + /* Enable error mask */ + c3_mipi_csi_write(csi, CSI2_HOST_MASK1, CSI2_HOST_ERROR_MASK1); +} + +static int c3_mipi_csi_start_stream(struct csi_device *csi) +{ + s64 link_freq; + s64 lane_rate; + + link_freq = v4l2_get_link_freq(csi->src_sd->ctrl_handler, 0, 0); + if (link_freq < 0) { + dev_err(csi->dev, "Unable to obtain link frequency: %lld\n", link_freq); + return link_freq; + } + + lane_rate = link_freq * 2; + if (lane_rate > 1500000000) + return -EINVAL; + + c3_mipi_csi_cfg_aphy(csi, csi->bus.num_data_lanes); + c3_mipi_csi_cfg_dphy(csi, csi->bus.num_data_lanes, lane_rate); + c3_mipi_csi_cfg_host(csi, csi->bus.num_data_lanes); + + return 0; +} + +static int c3_mipi_csi_enable_streams(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + u32 pad, u64 streams_mask) +{ + struct csi_device *csi = v4l2_get_subdevdata(sd); + u64 sink_streams; + int ret; + + guard(mutex)(&csi->lock); + + pm_runtime_resume_and_get(csi->dev); + + c3_mipi_csi_start_stream(csi); + + sink_streams = v4l2_subdev_state_xlate_streams(state, pad, + MIPI_CSI2_PAD_SINK, + &streams_mask); + ret = v4l2_subdev_enable_streams(csi->src_sd, + csi->src_sd_pad, + sink_streams); + if (ret) { + pm_runtime_put(csi->dev); + return ret; + } + + return 0; +} + +static int c3_mipi_csi_disable_streams(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + u32 pad, u64 streams_mask) +{ + struct csi_device *csi = v4l2_get_subdevdata(sd); + u64 sink_streams; + int ret; + + guard(mutex)(&csi->lock); + + sink_streams = v4l2_subdev_state_xlate_streams(state, pad, + MIPI_CSI2_PAD_SINK, + &streams_mask); + ret = v4l2_subdev_disable_streams(csi->src_sd, + csi->src_sd_pad, + sink_streams); + if (ret) + dev_err(csi->dev, "Failed to disable %s\n", csi->src_sd->name); + + pm_runtime_put(csi->dev); + + return ret; +} + +static int c3_mipi_csi_cfg_routing(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_krouting *routing) +{ + static const struct v4l2_mbus_framefmt format = { + .width = MIPI_CSI2_DEFAULT_WIDTH, + .height = MIPI_CSI2_DEFAULT_HEIGHT, + .code = MIPI_CSI2_DEFAULT_FMT, + .field = V4L2_FIELD_NONE, + .colorspace = V4L2_COLORSPACE_RAW, + .ycbcr_enc = V4L2_YCBCR_ENC_601, + .quantization = V4L2_QUANTIZATION_LIM_RANGE, + .xfer_func = V4L2_XFER_FUNC_NONE, + }; + int ret; + + ret = v4l2_subdev_routing_validate(sd, routing, + V4L2_SUBDEV_ROUTING_ONLY_1_TO_1); + if (ret) + return ret; + + ret = v4l2_subdev_set_routing_with_fmt(sd, state, routing, &format); + if (ret) + return ret; + + return 0; +} + +static int c3_mipi_csi_init_routing(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state) +{ + struct v4l2_subdev_route routes; + struct v4l2_subdev_krouting routing; + + routes.sink_pad = MIPI_CSI2_PAD_SINK; + routes.sink_stream = 0; + routes.source_pad = MIPI_CSI2_PAD_SRC; + routes.source_stream = 0; + routes.flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE; + + routing.num_routes = 1; + routing.routes = &routes; + + return c3_mipi_csi_cfg_routing(sd, state, &routing); +} + +static int c3_mipi_csi_set_routing(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + enum v4l2_subdev_format_whence which, + struct v4l2_subdev_krouting *routing) +{ + bool is_streaming = v4l2_subdev_is_streaming(sd); + + if (which == V4L2_SUBDEV_FORMAT_ACTIVE && is_streaming) + return -EBUSY; + + return c3_mipi_csi_cfg_routing(sd, state, routing); +} + +static int c3_mipi_csi_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_mbus_code_enum *code) +{ + switch (code->pad) { + case MIPI_CSI2_PAD_SINK: + if (code->index >= ARRAY_SIZE(c3_mipi_csi_formats)) + return -EINVAL; + + code->code = c3_mipi_csi_formats[code->index]; + break; + case MIPI_CSI2_PAD_SRC: + struct v4l2_mbus_framefmt *fmt; + + if (code->index > 0) + return -EINVAL; + + fmt = v4l2_subdev_state_get_format(state, code->pad); + code->code = fmt->code; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int c3_mipi_csi_set_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state, + struct v4l2_subdev_format *format) +{ + struct v4l2_mbus_framefmt *fmt; + unsigned int i; + + if (format->pad == MIPI_CSI2_PAD_SRC) + return v4l2_subdev_get_fmt(sd, state, format); + + if (format->pad != MIPI_CSI2_PAD_SINK) + return -EINVAL; + + fmt = v4l2_subdev_state_get_format(state, format->pad); + + for (i = 0; i < ARRAY_SIZE(c3_mipi_csi_formats); i++) + if (format->format.code == c3_mipi_csi_formats[i]) + break; + + if (i == ARRAY_SIZE(c3_mipi_csi_formats)) + fmt->code = c3_mipi_csi_formats[0]; + else + fmt->code = c3_mipi_csi_formats[i]; + + fmt->width = clamp_t(u32, format->format.width, + MIPI_CSI2_MIN_WIDTH, MIPI_CSI2_MAX_WIDTH); + fmt->height = clamp_t(u32, format->format.height, + MIPI_CSI2_MIN_HEIGHT, MIPI_CSI2_MAX_HEIGHT); + + format->format = *fmt; + + /* Synchronize the format to source pad */ + fmt = v4l2_subdev_state_get_format(state, MIPI_CSI2_PAD_SRC); + *fmt = format->format; + + return 0; +} + +static int c3_mipi_csi_init_state(struct v4l2_subdev *sd, + struct v4l2_subdev_state *state) +{ + struct v4l2_mbus_framefmt *sink_fmt; + struct v4l2_mbus_framefmt *src_fmt; + + sink_fmt = v4l2_subdev_state_get_format(state, MIPI_CSI2_PAD_SINK); + src_fmt = v4l2_subdev_state_get_format(state, MIPI_CSI2_PAD_SRC); + + sink_fmt->width = MIPI_CSI2_DEFAULT_WIDTH; + sink_fmt->height = MIPI_CSI2_DEFAULT_HEIGHT; + sink_fmt->field = V4L2_FIELD_NONE; + sink_fmt->code = MIPI_CSI2_DEFAULT_FMT; + sink_fmt->colorspace = V4L2_COLORSPACE_RAW; + sink_fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(sink_fmt->colorspace); + sink_fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(sink_fmt->colorspace); + sink_fmt->quantization = + V4L2_MAP_QUANTIZATION_DEFAULT(false, sink_fmt->colorspace, + sink_fmt->ycbcr_enc); + *src_fmt = *sink_fmt; + + return c3_mipi_csi_init_routing(sd, state); +} + +static const struct v4l2_subdev_pad_ops c3_mipi_csi_pad_ops = { + .enum_mbus_code = c3_mipi_csi_enum_mbus_code, + .get_fmt = v4l2_subdev_get_fmt, + .set_fmt = c3_mipi_csi_set_fmt, + .set_routing = c3_mipi_csi_set_routing, + .enable_streams = c3_mipi_csi_enable_streams, + .disable_streams = c3_mipi_csi_disable_streams, +}; + +static const struct v4l2_subdev_ops c3_mipi_csi_subdev_ops = { + .pad = &c3_mipi_csi_pad_ops, +}; + +static const struct v4l2_subdev_internal_ops c3_mipi_csi_internal_ops = { + .init_state = c3_mipi_csi_init_state, +}; + +/* Media entity operations */ +static const struct media_entity_operations c3_mipi_csi_entity_ops = { + .link_validate = v4l2_subdev_link_validate, +}; + +/* PM runtime */ + +static int __maybe_unused c3_mipi_csi_runtime_suspend(struct device *dev) +{ + struct csi_device *csi = dev_get_drvdata(dev); + + clk_bulk_disable_unprepare(csi->info->clock_num, csi->clock); + + return 0; +} + +static int __maybe_unused c3_mipi_csi_runtime_resume(struct device *dev) +{ + struct csi_device *csi = dev_get_drvdata(dev); + + return clk_bulk_prepare_enable(csi->info->clock_num, csi->clock); +} + +static const struct dev_pm_ops c3_mipi_csi_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) + SET_RUNTIME_PM_OPS(c3_mipi_csi_runtime_suspend, + c3_mipi_csi_runtime_resume, NULL) +}; + +/* Probe/remove & platform driver */ + +static int c3_mipi_csi_subdev_init(struct csi_device *csi) +{ + struct v4l2_subdev *sd = &csi->sd; + int ret; + + v4l2_subdev_init(sd, &c3_mipi_csi_subdev_ops); + sd->owner = THIS_MODULE; + sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + sd->internal_ops = &c3_mipi_csi_internal_ops; + snprintf(sd->name, sizeof(sd->name), "%s", MIPI_CSI2_SUBDEV_NAME); + + sd->entity.function = MEDIA_ENT_F_VID_IF_BRIDGE; + sd->entity.ops = &c3_mipi_csi_entity_ops; + + sd->dev = csi->dev; + v4l2_set_subdevdata(sd, csi); + + csi->pads[MIPI_CSI2_PAD_SINK].flags = MEDIA_PAD_FL_SINK; + csi->pads[MIPI_CSI2_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE; + ret = media_entity_pads_init(&sd->entity, MIPI_CSI2_PAD_MAX, csi->pads); + if (ret) + return ret; + + ret = v4l2_subdev_init_finalize(sd); + if (ret) { + media_entity_cleanup(&sd->entity); + return ret; + } + + return 0; +} + +static void c3_mipi_csi_subdev_deinit(struct csi_device *csi) +{ + v4l2_subdev_cleanup(&csi->sd); + media_entity_cleanup(&csi->sd.entity); +} + +/* Subdev notifier register */ +static int c3_mipi_csi_notify_bound(struct v4l2_async_notifier *notifier, + struct v4l2_subdev *sd, + struct v4l2_async_connection *asc) +{ + struct csi_device *csi = v4l2_get_subdevdata(notifier->sd); + struct media_pad *sink = &csi->sd.entity.pads[MIPI_CSI2_PAD_SINK]; + int ret; + + ret = media_entity_get_fwnode_pad(&sd->entity, + sd->fwnode, MEDIA_PAD_FL_SOURCE); + if (ret < 0) { + dev_err(csi->dev, "Failed to find pad for %s\n", sd->name); + return ret; + } + + csi->src_sd = sd; + csi->src_sd_pad = ret; + + return v4l2_create_fwnode_links_to_pad(sd, sink, MEDIA_LNK_FL_ENABLED | + MEDIA_LNK_FL_IMMUTABLE); +} + +static const struct v4l2_async_notifier_operations c3_mipi_csi_notify_ops = { + .bound = c3_mipi_csi_notify_bound, +}; + +static int c3_mipi_csi_async_register(struct csi_device *csi) +{ + struct v4l2_fwnode_endpoint vep = { + .bus_type = V4L2_MBUS_CSI2_DPHY, + }; + struct v4l2_async_connection *asc; + struct fwnode_handle *ep; + int ret; + + v4l2_async_subdev_nf_init(&csi->notifier, &csi->sd); + + ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(csi->dev), 0, 0, + FWNODE_GRAPH_ENDPOINT_NEXT); + if (!ep) + return -ENOTCONN; + + ret = v4l2_fwnode_endpoint_parse(ep, &vep); + if (ret) + goto err_put_handle; + + csi->bus = vep.bus.mipi_csi2; + if (csi->bus.num_data_lanes != 2 && csi->bus.num_data_lanes != 4) + goto err_put_handle; + + asc = v4l2_async_nf_add_fwnode_remote(&csi->notifier, ep, + struct v4l2_async_connection); + if (IS_ERR(asc)) { + ret = PTR_ERR(asc); + goto err_put_handle; + } + + csi->notifier.ops = &c3_mipi_csi_notify_ops; + ret = v4l2_async_nf_register(&csi->notifier); + if (ret) + goto err_cleanup_nf; + + ret = v4l2_async_register_subdev(&csi->sd); + if (ret) + goto err_unregister_nf; + + fwnode_handle_put(ep); + + return 0; + +err_unregister_nf: + v4l2_async_nf_unregister(&csi->notifier); +err_cleanup_nf: + v4l2_async_nf_cleanup(&csi->notifier); +err_put_handle: + fwnode_handle_put(ep); + return ret; +} + +static void c3_mipi_csi_async_unregister(struct csi_device *csi) +{ + v4l2_async_unregister_subdev(&csi->sd); + v4l2_async_nf_unregister(&csi->notifier); + v4l2_async_nf_cleanup(&csi->notifier); +} + +static int c3_mipi_csi_ioremap_resource(struct csi_device *csi) +{ + struct device *dev = csi->dev; + struct platform_device *pdev = to_platform_device(dev); + + csi->aphy = devm_platform_ioremap_resource_byname(pdev, "csi_aphy"); + if (IS_ERR(csi->aphy)) + return PTR_ERR(csi->aphy); + + csi->dphy = devm_platform_ioremap_resource_byname(pdev, "csi_dphy"); + if (IS_ERR(csi->dphy)) + return PTR_ERR(csi->dphy); + + csi->host = devm_platform_ioremap_resource_byname(pdev, "csi_host"); + if (IS_ERR(csi->host)) + return PTR_ERR(csi->host); + + return 0; +} + +static int c3_mipi_csi_configure_clocks(struct csi_device *csi) +{ + const struct csi_info *info = csi->info; + int ret; + u32 i; + + for (i = 0; i < info->clock_num; i++) + csi->clock[i].id = info->clock[i]; + + ret = devm_clk_bulk_get(csi->dev, info->clock_num, csi->clock); + if (ret) + return ret; + + for (i = 0; i < info->clock_num; i++) { + if (!info->clock_rate[i]) + continue; + ret = clk_set_rate(csi->clock[i].clk, info->clock_rate[i]); + if (ret) { + dev_err(csi->dev, "Failed to set %s rate %u\n", info->clock[i], + info->clock_rate[i]); + } + } + + return 0; +} + +static int c3_mipi_csi_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct csi_device *csi; + int ret; + + csi = devm_kzalloc(dev, sizeof(*csi), GFP_KERNEL); + if (!csi) + return -ENOMEM; + + csi->info = of_device_get_match_data(dev); + csi->dev = dev; + + ret = c3_mipi_csi_ioremap_resource(csi); + if (ret) { + dev_err(dev, "Failed to ioremap resource: %d\n", ret); + return ret; + } + + ret = c3_mipi_csi_configure_clocks(csi); + if (ret) { + dev_err(dev, "Failed to configure clocks: %d\n", ret); + return ret; + } + + platform_set_drvdata(pdev, csi); + + mutex_init(&csi->lock); + pm_runtime_enable(dev); + + ret = c3_mipi_csi_subdev_init(csi); + if (ret) + goto err_disable_runtime_pm; + + ret = c3_mipi_csi_async_register(csi); + if (ret) + goto err_deinit_subdev; + + return 0; + +err_deinit_subdev: + c3_mipi_csi_subdev_deinit(csi); +err_disable_runtime_pm: + pm_runtime_disable(dev); + mutex_destroy(&csi->lock); + return ret; +}; + +static void c3_mipi_csi_remove(struct platform_device *pdev) +{ + struct csi_device *csi = platform_get_drvdata(pdev); + + c3_mipi_csi_async_unregister(csi); + c3_mipi_csi_subdev_deinit(csi); + + pm_runtime_disable(&pdev->dev); + mutex_destroy(&csi->lock); +}; + +static const struct csi_info c3_mipi_csi_info = { + .clock = {"vapb", "csi_phy0"}, + .clock_rate = {0, 200000000}, + .clock_num = 2 +}; + +static const struct of_device_id c3_mipi_csi_of_match[] = { + { .compatible = "amlogic,c3-mipi-csi2", + .data = &c3_mipi_csi_info, + }, + { }, +}; +MODULE_DEVICE_TABLE(of, c3_mipi_csi_of_match); + +static struct platform_driver c3_mipi_csi_driver = { + .probe = c3_mipi_csi_probe, + .remove_new = c3_mipi_csi_remove, + .driver = { + .name = "c3-mipi-csi2", + .of_match_table = c3_mipi_csi_of_match, + .pm = &c3_mipi_csi_pm_ops, + }, +}; + +module_platform_driver(c3_mipi_csi_driver); + +MODULE_AUTHOR("Keke Li "); +MODULE_DESCRIPTION("Amlogic C3 MIPI CSI-2 receiver"); +MODULE_LICENSE("GPL");