[v2,04/19] media: camss: Add CSIPHY files

Message ID	1497883719-12410-5-git-send-email-todor.tomov@linaro.org (mailing list archive)
State	New, archived
Headers	show Return-Path: <linux-media-owner@kernel.org> From: Todor Tomov <todor.tomov@linaro.org> To: mchehab@kernel.org, hans.verkuil@cisco.com, javier@osg.samsung.com, s.nawrocki@samsung.com, linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org Cc: Todor Tomov <todor.tomov@linaro.org> Subject: [PATCH v2 04/19] media: camss: Add CSIPHY files Date: Mon, 19 Jun 2017 17:48:24 +0300 Message-Id: <1497883719-12410-5-git-send-email-todor.tomov@linaro.org> In-Reply-To: <1497883719-12410-1-git-send-email-todor.tomov@linaro.org> References: <1497883719-12410-1-git-send-email-todor.tomov@linaro.org> Sender: linux-media-owner@vger.kernel.org Precedence: bulk

Hi Sakari, On 06/29/2017 12:34 AM, Sakari Ailus wrote: > Hi Todor, > > It's been a while --- how do you do? > > Thanks for the patchset! Thank you for the review. I'll focus more on this now, so let's see :) > > On Mon, Jun 19, 2017 at 05:48:24PM +0300, Todor Tomov wrote: >> These files control the CSIPHY modules which are responsible for the physical >> layer of the CSI2 receivers. >> >> Signed-off-by: Todor Tomov <todor.tomov@linaro.org> >> --- >> drivers/media/platform/qcom/camss-8x16/csiphy.c | 686 ++++++++++++++++++++++++ >> drivers/media/platform/qcom/camss-8x16/csiphy.h | 77 +++ >> 2 files changed, 763 insertions(+) >> create mode 100644 drivers/media/platform/qcom/camss-8x16/csiphy.c >> create mode 100644 drivers/media/platform/qcom/camss-8x16/csiphy.h >> >> diff --git a/drivers/media/platform/qcom/camss-8x16/csiphy.c b/drivers/media/platform/qcom/camss-8x16/csiphy.c >> new file mode 100644 >> index 0000000..b9d47ca >> --- /dev/null >> +++ b/drivers/media/platform/qcom/camss-8x16/csiphy.c >> @@ -0,0 +1,686 @@ >> +/* >> + * csiphy.c >> + * >> + * Qualcomm MSM Camera Subsystem - CSIPHY Module >> + * >> + * Copyright (c) 2011-2015, The Linux Foundation. All rights reserved. >> + * Copyright (C) 2016 Linaro Ltd. > > How about 2017? How time flies... > >> + * >> + * This program is free software; you can redistribute it and/or modify >> + * it under the terms of the GNU General Public License version 2 and >> + * only version 2 as published by the Free Software Foundation. >> + * >> + * 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 <linux/clk.h> >> +#include <linux/delay.h> >> +#include <linux/interrupt.h> >> +#include <linux/kernel.h> >> +#include <linux/of.h> >> +#include <linux/platform_device.h> >> +#include <media/media-entity.h> >> +#include <media/v4l2-device.h> >> +#include <media/v4l2-subdev.h> >> + > > ... > >> +/* >> + * csiphy_init_formats - Initialize formats on all pads >> + * @sd: CSIPHY V4L2 subdevice >> + * @fh: V4L2 subdev file handle >> + * >> + * Initialize all pad formats with default values. >> + * >> + * Return 0 on success or a negative error code otherwise >> + */ >> +static int csiphy_init_formats(struct v4l2_subdev *sd, >> + struct v4l2_subdev_fh *fh) >> +{ >> + struct v4l2_subdev_format format; > > You can do: > > struct v4l2_subdev_format format = { 0 }; > > And drop the memset. Or even better, assign the fields in declaration. Yes. I'll do so for all memsets in the driver. > >> + >> + memset(&format, 0, sizeof(format)); >> + format.pad = MSM_CSIPHY_PAD_SINK; >> + format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE; >> + format.format.code = MEDIA_BUS_FMT_UYVY8_2X8; >> + format.format.width = 1920; >> + format.format.height = 1080; >> + >> + return csiphy_set_format(sd, fh ? fh->pad : NULL, &format); >> +} >> + >> +/* >> + * msm_csiphy_subdev_init - Initialize CSIPHY device structure and resources >> + * @csiphy: CSIPHY device >> + * @res: CSIPHY module resources table >> + * @id: CSIPHY module id >> + * >> + * Return 0 on success or a negative error code otherwise >> + */ >> +int msm_csiphy_subdev_init(struct csiphy_device *csiphy, >> + struct resources *res, u8 id) >> +{ >> + struct device *dev = to_device_index(csiphy, id); >> + struct platform_device *pdev = container_of(dev, >> + struct platform_device, dev); > > to_platform_device()? Yes, thanks. > >> + struct resource *r; >> + int i; >> + int ret; >> + >> + csiphy->id = id; >> + csiphy->cfg.combo_mode = 0; >> + >> + /* Memory */ >> + >> + r = platform_get_resource_byname(pdev, IORESOURCE_MEM, res->reg[0]); >> + csiphy->base = devm_ioremap_resource(dev, r); >> + if (IS_ERR(csiphy->base)) { >> + dev_err(dev, "could not map memory\n"); >> + return PTR_ERR(csiphy->base); >> + } >> + >> + r = platform_get_resource_byname(pdev, IORESOURCE_MEM, res->reg[1]); >> + csiphy->base_clk_mux = devm_ioremap_resource(dev, r); >> + if (IS_ERR(csiphy->base_clk_mux)) { >> + dev_err(dev, "could not map memory\n"); >> + return PTR_ERR(csiphy->base_clk_mux); >> + } >> + >> + /* Interrupt */ >> + >> + r = platform_get_resource_byname(pdev, IORESOURCE_IRQ, >> + res->interrupt[0]); >> + if (!r) { >> + dev_err(dev, "missing IRQ\n"); >> + return -EINVAL; >> + } >> + >> + csiphy->irq = r->start; >> + snprintf(csiphy->irq_name, sizeof(csiphy->irq_name), "%s_%s%d", >> + dev_name(dev), MSM_CSIPHY_NAME, csiphy->id); >> + ret = devm_request_irq(dev, csiphy->irq, csiphy_isr, >> + IRQF_TRIGGER_RISING, csiphy->irq_name, csiphy); >> + if (ret < 0) { >> + dev_err(dev, "request_irq failed\n"); > > Printing the error code as well might be nice for debugging if ever needed. Ok. > >> + return ret; >> + } >> + >> + disable_irq(csiphy->irq); >> + >> + /* Clocks */ >> + >> + csiphy->nclocks = 0; >> + while (res->clock[csiphy->nclocks]) >> + csiphy->nclocks++; >> + >> + csiphy->clock = devm_kzalloc(dev, csiphy->nclocks * >> + sizeof(*csiphy->clock), GFP_KERNEL); >> + if (!csiphy->clock) >> + return -ENOMEM; >> + >> + for (i = 0; i < csiphy->nclocks; i++) { >> + csiphy->clock[i] = devm_clk_get(dev, res->clock[i]); >> + if (IS_ERR(csiphy->clock[i])) >> + return PTR_ERR(csiphy->clock[i]); >> + >> + if (res->clock_rate[i]) { >> + long clk_rate = clk_round_rate(csiphy->clock[i], >> + res->clock_rate[i]); >> + if (clk_rate < 0) { >> + dev_err(to_device_index(csiphy, csiphy->id), >> + "clk round rate failed\n"); >> + return -EINVAL; >> + } >> + ret = clk_set_rate(csiphy->clock[i], clk_rate); >> + if (ret < 0) { >> + dev_err(to_device_index(csiphy, csiphy->id), >> + "clk set rate failed\n"); >> + return ret; >> + } >> + } >> + } >> + >> + return 0; >> +} >> + >> +/* >> + * csiphy_link_setup - Setup CSIPHY connections >> + * @entity: Pointer to media entity structure >> + * @local: Pointer to local pad >> + * @remote: Pointer to remote pad >> + * @flags: Link flags >> + * >> + * Rreturn 0 on success >> + */ >> +static int csiphy_link_setup(struct media_entity *entity, >> + const struct media_pad *local, >> + const struct media_pad *remote, u32 flags) >> +{ >> + if ((local->flags & MEDIA_PAD_FL_SOURCE) && >> + (flags & MEDIA_LNK_FL_ENABLED)) { >> + struct v4l2_subdev *sd; >> + struct csiphy_device *csiphy; >> + struct csid_device *csid; >> + >> + if (media_entity_remote_pad((struct media_pad *)local)) > > This is ugly. > > What do you intend to find with media_entity_remote_pad()? The pad flags > haven't been assigned to the pad yet, so media_entity_remote_pad() could > give you something else than remote. This is an attempt to check whether the pad is already linked - to refuse a second active connection from the same src pad. As far as I can say, it was a successful attempt. Do you see any problem with it? > >> + return -EBUSY; >> + >> + sd = container_of(entity, struct v4l2_subdev, entity); > > media_entity_to_v4l2_subdev(). Ok. > >> + csiphy = v4l2_get_subdevdata(sd); >> + >> + sd = container_of(remote->entity, struct v4l2_subdev, entity); > > Ditto. Ok. > >> + csid = v4l2_get_subdevdata(sd); >> + >> + csiphy->cfg.csid_id = csid->id; >> + } >> + >> + return 0; >> +} >> + >> +static const struct v4l2_subdev_core_ops csiphy_core_ops = { >> + .s_power = csiphy_set_power, >> +}; >> + >> +static const struct v4l2_subdev_video_ops csiphy_video_ops = { >> + .s_stream = csiphy_set_stream, >> +}; >> + >> +static const struct v4l2_subdev_pad_ops csiphy_pad_ops = { >> + .enum_mbus_code = csiphy_enum_mbus_code, >> + .enum_frame_size = csiphy_enum_frame_size, >> + .get_fmt = csiphy_get_format, >> + .set_fmt = csiphy_set_format, >> +}; >> + >> +static const struct v4l2_subdev_ops csiphy_v4l2_ops = { >> + .core = &csiphy_core_ops, >> + .video = &csiphy_video_ops, >> + .pad = &csiphy_pad_ops, >> +}; >> + >> +static const struct v4l2_subdev_internal_ops csiphy_v4l2_internal_ops = { >> + .open = csiphy_init_formats, >> +}; >> + >> +static const struct media_entity_operations csiphy_media_ops = { >> + .link_setup = csiphy_link_setup, >> + .link_validate = v4l2_subdev_link_validate, >> +}; >> + >> +/* >> + * msm_csiphy_register_entity - Register subdev node for CSIPHY module >> + * @csiphy: CSIPHY device >> + * @v4l2_dev: V4L2 device >> + * >> + * Return 0 on success or a negative error code otherwise >> + */ >> +int msm_csiphy_register_entity(struct csiphy_device *csiphy, >> + struct v4l2_device *v4l2_dev) >> +{ >> + struct v4l2_subdev *sd = &csiphy->subdev; >> + struct media_pad *pads = csiphy->pads; >> + struct device *dev = to_device_index(csiphy, csiphy->id); >> + int ret; >> + >> + v4l2_subdev_init(sd, &csiphy_v4l2_ops); >> + sd->internal_ops = &csiphy_v4l2_internal_ops; >> + sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; >> + snprintf(sd->name, ARRAY_SIZE(sd->name), "%s%d", >> + MSM_CSIPHY_NAME, csiphy->id); >> + v4l2_set_subdevdata(sd, csiphy); >> + >> + ret = csiphy_init_formats(sd, NULL); >> + if (ret < 0) { >> + dev_err(dev, "Failed to init format\n"); >> + return ret; >> + } >> + >> + pads[MSM_CSIPHY_PAD_SINK].flags = MEDIA_PAD_FL_SINK; >> + pads[MSM_CSIPHY_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE; >> + >> + sd->entity.function = MEDIA_ENT_F_IO_V4L; >> + sd->entity.ops = &csiphy_media_ops; >> + ret = media_entity_pads_init(&sd->entity, MSM_CSIPHY_PADS_NUM, pads); >> + if (ret < 0) { >> + dev_err(dev, "Failed to init media entity\n"); >> + return ret; >> + } >> + >> + ret = v4l2_device_register_subdev(v4l2_dev, sd); >> + if (ret < 0) { >> + dev_err(dev, "Failed to register subdev\n"); >> + media_entity_cleanup(&sd->entity); >> + } >> + >> + return ret; >> +} >> + >> +/* >> + * msm_csiphy_unregister_entity - Unregister CSIPHY module subdev node >> + * @csiphy: CSIPHY device >> + */ >> +void msm_csiphy_unregister_entity(struct csiphy_device *csiphy) >> +{ >> + v4l2_device_unregister_subdev(&csiphy->subdev); >> +} >> diff --git a/drivers/media/platform/qcom/camss-8x16/csiphy.h b/drivers/media/platform/qcom/camss-8x16/csiphy.h >> new file mode 100644 >> index 0000000..60330a8 >> --- /dev/null >> +++ b/drivers/media/platform/qcom/camss-8x16/csiphy.h >> @@ -0,0 +1,77 @@ >> +/* >> + * csiphy.h >> + * >> + * Qualcomm MSM Camera Subsystem - CSIPHY Module >> + * >> + * Copyright (c) 2011-2015, The Linux Foundation. All rights reserved. >> + * Copyright (C) 2016 Linaro Ltd. >> + * >> + * This program is free software; you can redistribute it and/or modify >> + * it under the terms of the GNU General Public License version 2 and >> + * only version 2 as published by the Free Software Foundation. >> + * >> + * 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. >> + */ >> +#ifndef QC_MSM_CAMSS_CSIPHY_H >> +#define QC_MSM_CAMSS_CSIPHY_H >> + >> +#include <linux/clk.h> >> +#include <media/media-entity.h> >> +#include <media/v4l2-device.h> >> +#include <media/v4l2-mediabus.h> >> +#include <media/v4l2-subdev.h> >> + >> +#define MSM_CSIPHY_PAD_SINK 0 >> +#define MSM_CSIPHY_PAD_SRC 1 >> +#define MSM_CSIPHY_PADS_NUM 2 >> + >> +struct csiphy_lane { >> + u8 pos; >> + u8 pol; >> +}; >> + >> +struct csiphy_lanes_cfg { >> + int num_data; >> + struct csiphy_lane *data; >> + struct csiphy_lane clk; >> +}; >> + >> +struct csiphy_csi2_cfg { >> + int settle_cnt; >> + struct csiphy_lanes_cfg lane_cfg; >> +}; >> + >> +struct csiphy_config { >> + u8 combo_mode; >> + u8 csid_id; >> + struct csiphy_csi2_cfg *csi2; >> +}; >> + >> +struct csiphy_device { >> + u8 id; >> + struct v4l2_subdev subdev; >> + struct media_pad pads[MSM_CSIPHY_PADS_NUM]; >> + void __iomem *base; >> + void __iomem *base_clk_mux; >> + u32 irq; >> + char irq_name[30]; >> + struct clk **clock; > > You could add a forward declaration and avoid including the header file for > struct clk. Up to you I guess --- for a driver specific header it doesn't > really matter much. > Ok, I can keep it for now then. >> + int nclocks; >> + struct csiphy_config cfg; >> + struct v4l2_mbus_framefmt fmt[MSM_CSIPHY_PADS_NUM]; >> +}; >> + >> +struct resources; >> + >> +int msm_csiphy_subdev_init(struct csiphy_device *csiphy, >> + struct resources *res, u8 id); >> + >> +int msm_csiphy_register_entity(struct csiphy_device *csiphy, >> + struct v4l2_device *v4l2_dev); >> + >> +void msm_csiphy_unregister_entity(struct csiphy_device *csiphy); >> + >> +#endif /* QC_MSM_CAMSS_CSIPHY_H */ >

diff --git a/drivers/media/platform/qcom/camss-8x16/csiphy.c b/drivers/media/platform/qcom/camss-8x16/csiphy.c new file mode 100644 index 0000000..b9d47ca --- /dev/null +++ b/drivers/media/platform/qcom/camss-8x16/csiphy.c @@ -0,0 +1,686 @@ +/* + * csiphy.c + * + * Qualcomm MSM Camera Subsystem - CSIPHY Module + * + * Copyright (c) 2011-2015, The Linux Foundation. All rights reserved. + * Copyright (C) 2016 Linaro Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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 <linux/clk.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <media/media-entity.h> +#include <media/v4l2-device.h> +#include <media/v4l2-subdev.h> + +#include "csiphy.h" +#include "camss.h" + +#define MSM_CSIPHY_NAME "msm_csiphy" + +#define CAMSS_CSI_PHY_LNn_CFG2(n) (0x004 + 0x40 * (n)) +#define CAMSS_CSI_PHY_LNn_CFG3(n) (0x008 + 0x40 * (n)) +#define CAMSS_CSI_PHY_GLBL_RESET 0x140 +#define CAMSS_CSI_PHY_GLBL_PWR_CFG 0x144 +#define CAMSS_CSI_PHY_GLBL_IRQ_CMD 0x164 +#define CAMSS_CSI_PHY_HW_VERSION 0x188 +#define CAMSS_CSI_PHY_INTERRUPT_STATUSn(n) (0x18c + 0x4 * (n)) +#define CAMSS_CSI_PHY_INTERRUPT_MASKn(n) (0x1ac + 0x4 * (n)) +#define CAMSS_CSI_PHY_INTERRUPT_CLEARn(n) (0x1cc + 0x4 * (n)) +#define CAMSS_CSI_PHY_GLBL_T_INIT_CFG0 0x1ec +#define CAMSS_CSI_PHY_T_WAKEUP_CFG0 0x1f4 + +static const u32 csiphy_formats[] = { + MEDIA_BUS_FMT_UYVY8_2X8, + MEDIA_BUS_FMT_VYUY8_2X8, + MEDIA_BUS_FMT_YUYV8_2X8, + MEDIA_BUS_FMT_YVYU8_2X8, + MEDIA_BUS_FMT_SBGGR8_1X8, + MEDIA_BUS_FMT_SGBRG8_1X8, + MEDIA_BUS_FMT_SGRBG8_1X8, + MEDIA_BUS_FMT_SRGGB8_1X8, + 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, +}; + +/* + * csiphy_isr - CSIPHY module interrupt handler + * @irq: Interrupt line + * @dev: CSIPHY device + * + * Return IRQ_HANDLED on success + */ +static irqreturn_t csiphy_isr(int irq, void *dev) +{ + struct csiphy_device *csiphy = dev; + u8 i; + + for (i = 0; i < 8; i++) { + u8 val = readl_relaxed(csiphy->base + + CAMSS_CSI_PHY_INTERRUPT_STATUSn(i)); + writel_relaxed(val, csiphy->base + + CAMSS_CSI_PHY_INTERRUPT_CLEARn(i)); + writel_relaxed(0x1, csiphy->base + CAMSS_CSI_PHY_GLBL_IRQ_CMD); + writel_relaxed(0x0, csiphy->base + CAMSS_CSI_PHY_GLBL_IRQ_CMD); + writel_relaxed(0x0, csiphy->base + + CAMSS_CSI_PHY_INTERRUPT_CLEARn(i)); + } + + return IRQ_HANDLED; +} + +/* + * csiphy_reset - Perform software reset on CSIPHY module + * @csiphy: CSIPHY device + */ +static void csiphy_reset(struct csiphy_device *csiphy) +{ + writel_relaxed(0x1, csiphy->base + CAMSS_CSI_PHY_GLBL_RESET); + usleep_range(5000, 8000); + writel_relaxed(0x0, csiphy->base + CAMSS_CSI_PHY_GLBL_RESET); +} + +/* + * csiphy_set_power - Power on/off CSIPHY module + * @sd: CSIPHY V4L2 subdevice + * @on: Requested power state + * + * Return 0 on success or a negative error code otherwise + */ +static int csiphy_set_power(struct v4l2_subdev *sd, int on) +{ + struct csiphy_device *csiphy = v4l2_get_subdevdata(sd); + struct device *dev = to_device_index(csiphy, csiphy->id); + int ret; + + if (on) { + u8 hw_version; + + ret = camss_enable_clocks(csiphy->nclocks, csiphy->clock, dev); + if (ret < 0) + return ret; + + enable_irq(csiphy->irq); + + csiphy_reset(csiphy); + + hw_version = readl_relaxed(csiphy->base + + CAMSS_CSI_PHY_HW_VERSION); + dev_dbg(dev, "CSIPHY HW Version = 0x%02x\n", hw_version); + } else { + disable_irq(csiphy->irq); + + camss_disable_clocks(csiphy->nclocks, csiphy->clock); + } + + return 0; +} + +/* + * csiphy_get_lane_mask - Calculate CSI2 lane mask configuration parameter + * @lane_cfg - CSI2 lane configuration + * + * Return lane mask + */ +static u8 csiphy_get_lane_mask(struct csiphy_lanes_cfg *lane_cfg) +{ + u8 lane_mask; + int i; + + lane_mask = 1 << lane_cfg->clk.pos; + + for (i = 0; i < lane_cfg->num_data; i++) + lane_mask |= 1 << lane_cfg->data[i].pos; + + return lane_mask; +} + +/* + * csiphy_stream_on - Enable streaming on CSIPHY module + * @csiphy: CSIPHY device + * + * Helper function to enable streaming on CSIPHY module. + * Main configuration of CSIPHY module is also done here. + */ +static void csiphy_stream_on(struct csiphy_device *csiphy) +{ + struct csiphy_config *cfg = &csiphy->cfg; + u8 lane_mask = csiphy_get_lane_mask(&cfg->csi2->lane_cfg); + u8 val; + int i = 0; + + val = readl_relaxed(csiphy->base_clk_mux); + if (cfg->combo_mode && (lane_mask & 0x18) == 0x18) { + val &= ~0xf0; + val |= cfg->csid_id << 4; + } else { + val &= ~0xf; + val |= cfg->csid_id; + } + writel_relaxed(val, csiphy->base_clk_mux); + + writel_relaxed(0x1, csiphy->base + + CAMSS_CSI_PHY_GLBL_T_INIT_CFG0); + writel_relaxed(0x1, csiphy->base + + CAMSS_CSI_PHY_T_WAKEUP_CFG0); + + val = 0x1; + val |= lane_mask << 1; + writel_relaxed(val, csiphy->base + CAMSS_CSI_PHY_GLBL_PWR_CFG); + + val = cfg->combo_mode << 4; + writel_relaxed(val, csiphy->base + CAMSS_CSI_PHY_GLBL_RESET); + + while (lane_mask) { + if (lane_mask & 0x1) { + writel_relaxed(0x10, csiphy->base + + CAMSS_CSI_PHY_LNn_CFG2(i)); + writel_relaxed(cfg->csi2->settle_cnt, csiphy->base + + CAMSS_CSI_PHY_LNn_CFG3(i)); + writel_relaxed(0x3f, csiphy->base + + CAMSS_CSI_PHY_INTERRUPT_MASKn(i)); + writel_relaxed(0x3f, csiphy->base + + CAMSS_CSI_PHY_INTERRUPT_CLEARn(i)); + } + + lane_mask >>= 1; + i++; + } +} + +/* + * csiphy_stream_off - Disable streaming on CSIPHY module + * @csiphy: CSIPHY device + * + * Helper function to disable streaming on CSIPHY module + */ +static void csiphy_stream_off(struct csiphy_device *csiphy) +{ + u8 lane_mask = csiphy_get_lane_mask(&csiphy->cfg.csi2->lane_cfg); + int i = 0; + + while (lane_mask) { + if (lane_mask & 0x1) + writel_relaxed(0x0, csiphy->base + + CAMSS_CSI_PHY_LNn_CFG2(i)); + + lane_mask >>= 1; + i++; + } + + writel_relaxed(0x0, csiphy->base + CAMSS_CSI_PHY_GLBL_PWR_CFG); +} + + +/* + * csiphy_set_stream - Enable/disable streaming on CSIPHY module + * @sd: CSIPHY V4L2 subdevice + * @enable: Requested streaming state + * + * Return 0 (awlays succeeds) + */ +static int csiphy_set_stream(struct v4l2_subdev *sd, int enable) +{ + struct csiphy_device *csiphy = v4l2_get_subdevdata(sd); + + if (enable) + csiphy_stream_on(csiphy); + else + csiphy_stream_off(csiphy); + + return 0; +} + +/* + * __csiphy_get_format - Get pointer to format structure + * @csiphy: CSIPHY device + * @cfg: V4L2 subdev pad configuration + * @pad: pad from which format is requested + * @which: TRY or ACTIVE format + * + * Return pointer to TRY or ACTIVE format structure + */ +static struct v4l2_mbus_framefmt * +__csiphy_get_format(struct csiphy_device *csiphy, + struct v4l2_subdev_pad_config *cfg, + unsigned int pad, + enum v4l2_subdev_format_whence which) +{ + if (which == V4L2_SUBDEV_FORMAT_TRY) + return v4l2_subdev_get_try_format(&csiphy->subdev, cfg, pad); + + return &csiphy->fmt[pad]; +} + +/* + * csiphy_try_format - Handle try format by pad subdev method + * @csiphy: CSIPHY device + * @cfg: V4L2 subdev pad configuration + * @pad: pad on which format is requested + * @fmt: pointer to v4l2 format structure + * @which: wanted subdev format + */ +static void csiphy_try_format(struct csiphy_device *csiphy, + struct v4l2_subdev_pad_config *cfg, + unsigned int pad, + struct v4l2_mbus_framefmt *fmt, + enum v4l2_subdev_format_whence which) +{ + unsigned int i; + + switch (pad) { + case MSM_CSIPHY_PAD_SINK: + /* Set format on sink pad */ + + for (i = 0; i < ARRAY_SIZE(csiphy_formats); i++) + if (fmt->code == csiphy_formats[i]) + break; + + /* If not found, use UYVY as default */ + if (i >= ARRAY_SIZE(csiphy_formats)) + fmt->code = MEDIA_BUS_FMT_UYVY8_2X8; + + fmt->width = clamp_t(u32, fmt->width, 1, 8191); + fmt->height = clamp_t(u32, fmt->height, 1, 8191); + + if (fmt->field == V4L2_FIELD_ANY) + fmt->field = V4L2_FIELD_NONE; + + fmt->colorspace = V4L2_COLORSPACE_SRGB; + + break; + + case MSM_CSIPHY_PAD_SRC: + /* Set and return a format same as sink pad */ + + *fmt = *__csiphy_get_format(csiphy, cfg, MSM_CSID_PAD_SINK, + which); + + break; + } +} + +/* + * csiphy_enum_mbus_code - Handle pixel format enumeration + * @sd: CSIPHY V4L2 subdevice + * @cfg: V4L2 subdev pad configuration + * @code: pointer to v4l2_subdev_mbus_code_enum structure + * return -EINVAL or zero on success + */ +static int csiphy_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_mbus_code_enum *code) +{ + struct csiphy_device *csiphy = v4l2_get_subdevdata(sd); + struct v4l2_mbus_framefmt *format; + + if (code->pad == MSM_CSIPHY_PAD_SINK) { + if (code->index >= ARRAY_SIZE(csiphy_formats)) + return -EINVAL; + + code->code = csiphy_formats[code->index]; + } else { + if (code->index > 0) + return -EINVAL; + + format = __csiphy_get_format(csiphy, cfg, MSM_CSIPHY_PAD_SINK, + code->which); + + code->code = format->code; + } + + return 0; +} + +/* + * csiphy_enum_frame_size - Handle frame size enumeration + * @sd: CSIPHY V4L2 subdevice + * @cfg: V4L2 subdev pad configuration + * @fse: pointer to v4l2_subdev_frame_size_enum structure + * return -EINVAL or zero on success + */ +static int csiphy_enum_frame_size(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_frame_size_enum *fse) +{ + struct csiphy_device *csiphy = v4l2_get_subdevdata(sd); + struct v4l2_mbus_framefmt format; + + if (fse->index != 0) + return -EINVAL; + + format.code = fse->code; + format.width = 1; + format.height = 1; + csiphy_try_format(csiphy, cfg, fse->pad, &format, fse->which); + fse->min_width = format.width; + fse->min_height = format.height; + + if (format.code != fse->code) + return -EINVAL; + + format.code = fse->code; + format.width = -1; + format.height = -1; + csiphy_try_format(csiphy, cfg, fse->pad, &format, fse->which); + fse->max_width = format.width; + fse->max_height = format.height; + + return 0; +} + +/* + * csiphy_get_format - Handle get format by pads subdev method + * @sd: CSIPHY V4L2 subdevice + * @cfg: V4L2 subdev pad configuration + * @fmt: pointer to v4l2 subdev format structure + * + * Return -EINVAL or zero on success + */ +static int csiphy_get_format(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *fmt) +{ + struct csiphy_device *csiphy = v4l2_get_subdevdata(sd); + struct v4l2_mbus_framefmt *format; + + format = __csiphy_get_format(csiphy, cfg, fmt->pad, fmt->which); + if (format == NULL) + return -EINVAL; + + fmt->format = *format; + + return 0; +} + +/* + * csiphy_set_format - Handle set format by pads subdev method + * @sd: CSIPHY V4L2 subdevice + * @cfg: V4L2 subdev pad configuration + * @fmt: pointer to v4l2 subdev format structure + * + * Return -EINVAL or zero on success + */ +static int csiphy_set_format(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *fmt) +{ + struct csiphy_device *csiphy = v4l2_get_subdevdata(sd); + struct v4l2_mbus_framefmt *format; + + format = __csiphy_get_format(csiphy, cfg, fmt->pad, fmt->which); + if (format == NULL) + return -EINVAL; + + csiphy_try_format(csiphy, cfg, fmt->pad, &fmt->format, fmt->which); + *format = fmt->format; + + /* Propagate the format from sink to source */ + if (fmt->pad == MSM_CSIPHY_PAD_SINK) { + format = __csiphy_get_format(csiphy, cfg, MSM_CSIPHY_PAD_SRC, + fmt->which); + + *format = fmt->format; + csiphy_try_format(csiphy, cfg, MSM_CSIPHY_PAD_SRC, format, + fmt->which); + } + + return 0; +} + +/* + * csiphy_init_formats - Initialize formats on all pads + * @sd: CSIPHY V4L2 subdevice + * @fh: V4L2 subdev file handle + * + * Initialize all pad formats with default values. + * + * Return 0 on success or a negative error code otherwise + */ +static int csiphy_init_formats(struct v4l2_subdev *sd, + struct v4l2_subdev_fh *fh) +{ + struct v4l2_subdev_format format; + + memset(&format, 0, sizeof(format)); + format.pad = MSM_CSIPHY_PAD_SINK; + format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE; + format.format.code = MEDIA_BUS_FMT_UYVY8_2X8; + format.format.width = 1920; + format.format.height = 1080; + + return csiphy_set_format(sd, fh ? fh->pad : NULL, &format); +} + +/* + * msm_csiphy_subdev_init - Initialize CSIPHY device structure and resources + * @csiphy: CSIPHY device + * @res: CSIPHY module resources table + * @id: CSIPHY module id + * + * Return 0 on success or a negative error code otherwise + */ +int msm_csiphy_subdev_init(struct csiphy_device *csiphy, + struct resources *res, u8 id) +{ + struct device *dev = to_device_index(csiphy, id); + struct platform_device *pdev = container_of(dev, + struct platform_device, dev); + struct resource *r; + int i; + int ret; + + csiphy->id = id; + csiphy->cfg.combo_mode = 0; + + /* Memory */ + + r = platform_get_resource_byname(pdev, IORESOURCE_MEM, res->reg[0]); + csiphy->base = devm_ioremap_resource(dev, r); + if (IS_ERR(csiphy->base)) { + dev_err(dev, "could not map memory\n"); + return PTR_ERR(csiphy->base); + } + + r = platform_get_resource_byname(pdev, IORESOURCE_MEM, res->reg[1]); + csiphy->base_clk_mux = devm_ioremap_resource(dev, r); + if (IS_ERR(csiphy->base_clk_mux)) { + dev_err(dev, "could not map memory\n"); + return PTR_ERR(csiphy->base_clk_mux); + } + + /* Interrupt */ + + r = platform_get_resource_byname(pdev, IORESOURCE_IRQ, + res->interrupt[0]); + if (!r) { + dev_err(dev, "missing IRQ\n"); + return -EINVAL; + } + + csiphy->irq = r->start; + snprintf(csiphy->irq_name, sizeof(csiphy->irq_name), "%s_%s%d", + dev_name(dev), MSM_CSIPHY_NAME, csiphy->id); + ret = devm_request_irq(dev, csiphy->irq, csiphy_isr, + IRQF_TRIGGER_RISING, csiphy->irq_name, csiphy); + if (ret < 0) { + dev_err(dev, "request_irq failed\n"); + return ret; + } + + disable_irq(csiphy->irq); + + /* Clocks */ + + csiphy->nclocks = 0; + while (res->clock[csiphy->nclocks]) + csiphy->nclocks++; + + csiphy->clock = devm_kzalloc(dev, csiphy->nclocks * + sizeof(*csiphy->clock), GFP_KERNEL); + if (!csiphy->clock) + return -ENOMEM; + + for (i = 0; i < csiphy->nclocks; i++) { + csiphy->clock[i] = devm_clk_get(dev, res->clock[i]); + if (IS_ERR(csiphy->clock[i])) + return PTR_ERR(csiphy->clock[i]); + + if (res->clock_rate[i]) { + long clk_rate = clk_round_rate(csiphy->clock[i], + res->clock_rate[i]); + if (clk_rate < 0) { + dev_err(to_device_index(csiphy, csiphy->id), + "clk round rate failed\n"); + return -EINVAL; + } + ret = clk_set_rate(csiphy->clock[i], clk_rate); + if (ret < 0) { + dev_err(to_device_index(csiphy, csiphy->id), + "clk set rate failed\n"); + return ret; + } + } + } + + return 0; +} + +/* + * csiphy_link_setup - Setup CSIPHY connections + * @entity: Pointer to media entity structure + * @local: Pointer to local pad + * @remote: Pointer to remote pad + * @flags: Link flags + * + * Rreturn 0 on success + */ +static int csiphy_link_setup(struct media_entity *entity, + const struct media_pad *local, + const struct media_pad *remote, u32 flags) +{ + if ((local->flags & MEDIA_PAD_FL_SOURCE) && + (flags & MEDIA_LNK_FL_ENABLED)) { + struct v4l2_subdev *sd; + struct csiphy_device *csiphy; + struct csid_device *csid; + + if (media_entity_remote_pad((struct media_pad *)local)) + return -EBUSY; + + sd = container_of(entity, struct v4l2_subdev, entity); + csiphy = v4l2_get_subdevdata(sd); + + sd = container_of(remote->entity, struct v4l2_subdev, entity); + csid = v4l2_get_subdevdata(sd); + + csiphy->cfg.csid_id = csid->id; + } + + return 0; +} + +static const struct v4l2_subdev_core_ops csiphy_core_ops = { + .s_power = csiphy_set_power, +}; + +static const struct v4l2_subdev_video_ops csiphy_video_ops = { + .s_stream = csiphy_set_stream, +}; + +static const struct v4l2_subdev_pad_ops csiphy_pad_ops = { + .enum_mbus_code = csiphy_enum_mbus_code, + .enum_frame_size = csiphy_enum_frame_size, + .get_fmt = csiphy_get_format, + .set_fmt = csiphy_set_format, +}; + +static const struct v4l2_subdev_ops csiphy_v4l2_ops = { + .core = &csiphy_core_ops, + .video = &csiphy_video_ops, + .pad = &csiphy_pad_ops, +}; + +static const struct v4l2_subdev_internal_ops csiphy_v4l2_internal_ops = { + .open = csiphy_init_formats, +}; + +static const struct media_entity_operations csiphy_media_ops = { + .link_setup = csiphy_link_setup, + .link_validate = v4l2_subdev_link_validate, +}; + +/* + * msm_csiphy_register_entity - Register subdev node for CSIPHY module + * @csiphy: CSIPHY device + * @v4l2_dev: V4L2 device + * + * Return 0 on success or a negative error code otherwise + */ +int msm_csiphy_register_entity(struct csiphy_device *csiphy, + struct v4l2_device *v4l2_dev) +{ + struct v4l2_subdev *sd = &csiphy->subdev; + struct media_pad *pads = csiphy->pads; + struct device *dev = to_device_index(csiphy, csiphy->id); + int ret; + + v4l2_subdev_init(sd, &csiphy_v4l2_ops); + sd->internal_ops = &csiphy_v4l2_internal_ops; + sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + snprintf(sd->name, ARRAY_SIZE(sd->name), "%s%d", + MSM_CSIPHY_NAME, csiphy->id); + v4l2_set_subdevdata(sd, csiphy); + + ret = csiphy_init_formats(sd, NULL); + if (ret < 0) { + dev_err(dev, "Failed to init format\n"); + return ret; + } + + pads[MSM_CSIPHY_PAD_SINK].flags = MEDIA_PAD_FL_SINK; + pads[MSM_CSIPHY_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE; + + sd->entity.function = MEDIA_ENT_F_IO_V4L; + sd->entity.ops = &csiphy_media_ops; + ret = media_entity_pads_init(&sd->entity, MSM_CSIPHY_PADS_NUM, pads); + if (ret < 0) { + dev_err(dev, "Failed to init media entity\n"); + return ret; + } + + ret = v4l2_device_register_subdev(v4l2_dev, sd); + if (ret < 0) { + dev_err(dev, "Failed to register subdev\n"); + media_entity_cleanup(&sd->entity); + } + + return ret; +} + +/* + * msm_csiphy_unregister_entity - Unregister CSIPHY module subdev node + * @csiphy: CSIPHY device + */ +void msm_csiphy_unregister_entity(struct csiphy_device *csiphy) +{ + v4l2_device_unregister_subdev(&csiphy->subdev); +} diff --git a/drivers/media/platform/qcom/camss-8x16/csiphy.h b/drivers/media/platform/qcom/camss-8x16/csiphy.h new file mode 100644 index 0000000..60330a8 --- /dev/null +++ b/drivers/media/platform/qcom/camss-8x16/csiphy.h @@ -0,0 +1,77 @@ +/* + * csiphy.h + * + * Qualcomm MSM Camera Subsystem - CSIPHY Module + * + * Copyright (c) 2011-2015, The Linux Foundation. All rights reserved. + * Copyright (C) 2016 Linaro Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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. + */ +#ifndef QC_MSM_CAMSS_CSIPHY_H +#define QC_MSM_CAMSS_CSIPHY_H + +#include <linux/clk.h> +#include <media/media-entity.h> +#include <media/v4l2-device.h> +#include <media/v4l2-mediabus.h> +#include <media/v4l2-subdev.h> + +#define MSM_CSIPHY_PAD_SINK 0 +#define MSM_CSIPHY_PAD_SRC 1 +#define MSM_CSIPHY_PADS_NUM 2 + +struct csiphy_lane { + u8 pos; + u8 pol; +}; + +struct csiphy_lanes_cfg { + int num_data; + struct csiphy_lane *data; + struct csiphy_lane clk; +}; + +struct csiphy_csi2_cfg { + int settle_cnt; + struct csiphy_lanes_cfg lane_cfg; +}; + +struct csiphy_config { + u8 combo_mode; + u8 csid_id; + struct csiphy_csi2_cfg *csi2; +}; + +struct csiphy_device { + u8 id; + struct v4l2_subdev subdev; + struct media_pad pads[MSM_CSIPHY_PADS_NUM]; + void __iomem *base; + void __iomem *base_clk_mux; + u32 irq; + char irq_name[30]; + struct clk **clock; + int nclocks; + struct csiphy_config cfg; + struct v4l2_mbus_framefmt fmt[MSM_CSIPHY_PADS_NUM]; +}; + +struct resources; + +int msm_csiphy_subdev_init(struct csiphy_device *csiphy, + struct resources *res, u8 id); + +int msm_csiphy_register_entity(struct csiphy_device *csiphy, + struct v4l2_device *v4l2_dev); + +void msm_csiphy_unregister_entity(struct csiphy_device *csiphy); + +#endif /* QC_MSM_CAMSS_CSIPHY_H */

[v2,04/19] media: camss: Add CSIPHY files

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