| Message ID | 1500287629-23703-8-git-send-email-todor.tomov@linaro.org |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Qualcomm 8x16 Camera Subsystem driver | expand |
Hi Todor, On Mon, Jul 17, 2017 at 01:33:33PM +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> > --- > .../media/platform/qcom/camss-8x16/camss-csiphy.c | 816 +++++++++++++++++++++ > .../media/platform/qcom/camss-8x16/camss-csiphy.h | 77 ++ > 2 files changed, 893 insertions(+) > create mode 100644 drivers/media/platform/qcom/camss-8x16/camss-csiphy.c > create mode 100644 drivers/media/platform/qcom/camss-8x16/camss-csiphy.h > > diff --git a/drivers/media/platform/qcom/camss-8x16/camss-csiphy.c b/drivers/media/platform/qcom/camss-8x16/camss-csiphy.c > new file mode 100644 > index 0000000..4e7ddc4 > --- /dev/null > +++ b/drivers/media/platform/qcom/camss-8x16/camss-csiphy.c > @@ -0,0 +1,816 @@ > +/* > + * camss-csiphy.c > + * > + * Qualcomm MSM Camera Subsystem - CSIPHY Module > + * > + * Copyright (c) 2011-2015, The Linux Foundation. All rights reserved. > + * Copyright (C) 2016-2017 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 "camss-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 struct { > + u32 code; > + u8 bpp; > +} csiphy_formats[] = { > + { > + MEDIA_BUS_FMT_UYVY8_2X8, > + 8, I might put these on a single line per array entry. Up to you. > + }, > + { > + MEDIA_BUS_FMT_VYUY8_2X8, > + 8, > + }, > + { > + MEDIA_BUS_FMT_YUYV8_2X8, > + 8, > + }, > + { > + MEDIA_BUS_FMT_YVYU8_2X8, > + 8, > + }, > + { > + MEDIA_BUS_FMT_SBGGR8_1X8, > + 8, > + }, > + { > + MEDIA_BUS_FMT_SGBRG8_1X8, > + 8, > + }, > + { > + MEDIA_BUS_FMT_SGRBG8_1X8, > + 8, > + }, > + { > + MEDIA_BUS_FMT_SRGGB8_1X8, > + 8, > + }, > + { > + MEDIA_BUS_FMT_SBGGR10_1X10, > + 10, > + }, > + { > + MEDIA_BUS_FMT_SGBRG10_1X10, > + 10, > + }, > + { > + MEDIA_BUS_FMT_SGRBG10_1X10, > + 10, > + }, > + { > + MEDIA_BUS_FMT_SRGGB10_1X10, > + 10, > + }, > + { > + MEDIA_BUS_FMT_SBGGR12_1X12, > + 12, > + }, > + { > + MEDIA_BUS_FMT_SGBRG12_1X12, > + 12, > + }, > + { > + MEDIA_BUS_FMT_SGRBG12_1X12, > + 12, > + }, > + { > + MEDIA_BUS_FMT_SRGGB12_1X12, > + 12, > + } > +}; > + > +/* > + * csiphy_get_bpp - map media bus format to bits per pixel > + * @code: media bus format code > + * > + * Return number of bits per pixel > + */ > +static u8 csiphy_get_bpp(u32 code) > +{ > + unsigned int i; > + > + for (i = 0; i < ARRAY_SIZE(csiphy_formats); i++) > + if (code == csiphy_formats[i].code) > + break; I'd return the entry here and have __WARN() and return 8 (or safe value) in the end for extra safety. > + > + return csiphy_formats[i].bpp; > +} > + > +/* > + * 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) { You could declare ret here. > + 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_settle_cnt_calc - Calculate settle count value > + * @csiphy: CSIPHY device > + * > + * Helper function to calculate settle count value. This is > + * based on the CSI2 T_hs_settle parameter which in turn > + * is calculated based on the CSI2 transmitter pixel clock > + * frequency. > + * > + * Return settle count value or 0 if the CSI2 pixel clock > + * frequency is not available > + */ > +static u8 csiphy_settle_cnt_calc(struct csiphy_device *csiphy) > +{ > + u8 bpp = csiphy_get_bpp( > + csiphy->fmt[MSM_CSIPHY_PAD_SINK].code); > + u8 num_lanes = csiphy->cfg.csi2->lane_cfg.num_data; > + u32 pixel_clock; /* Hz */ > + u32 mipi_clock; /* Hz */ > + u32 ui; /* ps */ > + u32 timer_period; /* ps */ > + u32 t_hs_prepare_max; /* ps */ > + u32 t_hs_prepare_zero_min; /* ps */ > + u32 t_hs_settle; /* ps */ > + u8 settle_cnt; > + int ret; > + > + ret = camss_get_pixel_clock(&csiphy->subdev.entity, &pixel_clock); > + if (ret) { > + dev_err(to_device_index(csiphy, csiphy->id), > + "Cannot get CSI2 transmitter's pixel clock\n"); > + return 0; > + } > + > + mipi_clock = pixel_clock * bpp / (2 * num_lanes); > + ui = 1000000000000 / (mipi_clock * 2); I don't think you lost anything if you divide by two seprately from mipi_lock. On suitable mipi_clock you could get overflow to 0. > + t_hs_prepare_max = 85000 + 6 * ui; > + t_hs_prepare_zero_min = 145000 + 10 * ui; > + t_hs_settle = (t_hs_prepare_max + t_hs_prepare_zero_min) / 2; > + > + timer_period = 1000000000000 / csiphy->timer_clk_rate; > + settle_cnt = t_hs_settle / timer_period; > + > + return settle_cnt; > +} > + > +/* > + * 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. > + * > + * Return 0 on success or a negative error code otherwise > + */ > +static int 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 settle_cnt; > + u8 val; > + int i = 0; > + > + settle_cnt = csiphy_settle_cnt_calc(csiphy); > + if (!settle_cnt) > + return -EINVAL; > + > + 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(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++; > + } > + > + return 0; > +} > + > +/* > + * 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 on success or a negative error code otherwise > + */ > +static int csiphy_set_stream(struct v4l2_subdev *sd, int enable) > +{ > + struct csiphy_device *csiphy = v4l2_get_subdevdata(sd); > + int ret = 0; > + > + if (enable) > + ret = csiphy_stream_on(csiphy); > + else > + csiphy_stream_off(csiphy); > + > + return ret; > +} > + > +/* > + * __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].code) > + 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].code; > + } 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 = { > + .pad = MSM_CSIPHY_PAD_SINK, > + .which = fh ? V4L2_SUBDEV_FORMAT_TRY : > + V4L2_SUBDEV_FORMAT_ACTIVE, > + .format = { > + .code = MEDIA_BUS_FMT_UYVY8_2X8, > + .width = 1920, > + .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, > + const struct resources *res, u8 id) > +{ > + struct device *dev = to_device_index(csiphy, id); > + struct platform_device *pdev = to_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: %d\n", ret); > + 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: %ld\n", > + clk_rate); > + 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: %d\n", ret); > + return ret; > + } > + > + if (!strcmp(res->clock[i], "csiphy0_timer") || > + !strcmp(res->clock[i], "csiphy1_timer")) > + csiphy->timer_clk_rate = clk_rate; > + } > + } > + > + 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(local)) > + return -EBUSY; > + > + sd = media_entity_to_v4l2_subdev(entity); > + csiphy = v4l2_get_subdevdata(sd); > + > + sd = media_entity_to_v4l2_subdev(remote->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: %d\n", ret); > + 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: %d\n", ret); > + return ret; > + } > + > + ret = v4l2_device_register_subdev(v4l2_dev, sd); > + if (ret < 0) { > + dev_err(dev, "Failed to register subdev: %d\n", ret); > + 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/camss-csiphy.h b/drivers/media/platform/qcom/camss-8x16/camss-csiphy.h > new file mode 100644 > index 0000000..a6f23ed > --- /dev/null > +++ b/drivers/media/platform/qcom/camss-8x16/camss-csiphy.h > @@ -0,0 +1,77 @@ > +/* > + * camss-csiphy.h > + * > + * Qualcomm MSM Camera Subsystem - CSIPHY Module > + * > + * Copyright (c) 2011-2015, The Linux Foundation. All rights reserved. > + * Copyright (C) 2016-2017 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 { > + 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; > + long timer_clk_rate; u32? Or can this be more than 32 bits? In that case u64. > + struct csiphy_config cfg; > + struct v4l2_mbus_framefmt fmt[MSM_CSIPHY_PADS_NUM]; > +}; > + > +struct resources; > + > +int msm_csiphy_subdev_init(struct csiphy_device *csiphy, > + const 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 */ -- Regards, Sakari Ailus e-mail: sakari.ailus@iki.fi XMPP: sailus@retiisi.org.uk
diff --git a/drivers/media/platform/qcom/camss-8x16/camss-csiphy.c b/drivers/media/platform/qcom/camss-8x16/camss-csiphy.c new file mode 100644 index 0000000..4e7ddc4 --- /dev/null +++ b/drivers/media/platform/qcom/camss-8x16/camss-csiphy.c @@ -0,0 +1,816 @@ +/* + * camss-csiphy.c + * + * Qualcomm MSM Camera Subsystem - CSIPHY Module + * + * Copyright (c) 2011-2015, The Linux Foundation. All rights reserved. + * Copyright (C) 2016-2017 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 "camss-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 struct { + u32 code; + u8 bpp; +} csiphy_formats[] = { + { + MEDIA_BUS_FMT_UYVY8_2X8, + 8, + }, + { + MEDIA_BUS_FMT_VYUY8_2X8, + 8, + }, + { + MEDIA_BUS_FMT_YUYV8_2X8, + 8, + }, + { + MEDIA_BUS_FMT_YVYU8_2X8, + 8, + }, + { + MEDIA_BUS_FMT_SBGGR8_1X8, + 8, + }, + { + MEDIA_BUS_FMT_SGBRG8_1X8, + 8, + }, + { + MEDIA_BUS_FMT_SGRBG8_1X8, + 8, + }, + { + MEDIA_BUS_FMT_SRGGB8_1X8, + 8, + }, + { + MEDIA_BUS_FMT_SBGGR10_1X10, + 10, + }, + { + MEDIA_BUS_FMT_SGBRG10_1X10, + 10, + }, + { + MEDIA_BUS_FMT_SGRBG10_1X10, + 10, + }, + { + MEDIA_BUS_FMT_SRGGB10_1X10, + 10, + }, + { + MEDIA_BUS_FMT_SBGGR12_1X12, + 12, + }, + { + MEDIA_BUS_FMT_SGBRG12_1X12, + 12, + }, + { + MEDIA_BUS_FMT_SGRBG12_1X12, + 12, + }, + { + MEDIA_BUS_FMT_SRGGB12_1X12, + 12, + } +}; + +/* + * csiphy_get_bpp - map media bus format to bits per pixel + * @code: media bus format code + * + * Return number of bits per pixel + */ +static u8 csiphy_get_bpp(u32 code) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(csiphy_formats); i++) + if (code == csiphy_formats[i].code) + break; + + return csiphy_formats[i].bpp; +} + +/* + * 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_settle_cnt_calc - Calculate settle count value + * @csiphy: CSIPHY device + * + * Helper function to calculate settle count value. This is + * based on the CSI2 T_hs_settle parameter which in turn + * is calculated based on the CSI2 transmitter pixel clock + * frequency. + * + * Return settle count value or 0 if the CSI2 pixel clock + * frequency is not available + */ +static u8 csiphy_settle_cnt_calc(struct csiphy_device *csiphy) +{ + u8 bpp = csiphy_get_bpp( + csiphy->fmt[MSM_CSIPHY_PAD_SINK].code); + u8 num_lanes = csiphy->cfg.csi2->lane_cfg.num_data; + u32 pixel_clock; /* Hz */ + u32 mipi_clock; /* Hz */ + u32 ui; /* ps */ + u32 timer_period; /* ps */ + u32 t_hs_prepare_max; /* ps */ + u32 t_hs_prepare_zero_min; /* ps */ + u32 t_hs_settle; /* ps */ + u8 settle_cnt; + int ret; + + ret = camss_get_pixel_clock(&csiphy->subdev.entity, &pixel_clock); + if (ret) { + dev_err(to_device_index(csiphy, csiphy->id), + "Cannot get CSI2 transmitter's pixel clock\n"); + return 0; + } + + mipi_clock = pixel_clock * bpp / (2 * num_lanes); + ui = 1000000000000 / (mipi_clock * 2); + t_hs_prepare_max = 85000 + 6 * ui; + t_hs_prepare_zero_min = 145000 + 10 * ui; + t_hs_settle = (t_hs_prepare_max + t_hs_prepare_zero_min) / 2; + + timer_period = 1000000000000 / csiphy->timer_clk_rate; + settle_cnt = t_hs_settle / timer_period; + + return settle_cnt; +} + +/* + * 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. + * + * Return 0 on success or a negative error code otherwise + */ +static int 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 settle_cnt; + u8 val; + int i = 0; + + settle_cnt = csiphy_settle_cnt_calc(csiphy); + if (!settle_cnt) + return -EINVAL; + + 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(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++; + } + + return 0; +} + +/* + * 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 on success or a negative error code otherwise + */ +static int csiphy_set_stream(struct v4l2_subdev *sd, int enable) +{ + struct csiphy_device *csiphy = v4l2_get_subdevdata(sd); + int ret = 0; + + if (enable) + ret = csiphy_stream_on(csiphy); + else + csiphy_stream_off(csiphy); + + return ret; +} + +/* + * __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].code) + 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].code; + } 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 = { + .pad = MSM_CSIPHY_PAD_SINK, + .which = fh ? V4L2_SUBDEV_FORMAT_TRY : + V4L2_SUBDEV_FORMAT_ACTIVE, + .format = { + .code = MEDIA_BUS_FMT_UYVY8_2X8, + .width = 1920, + .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, + const struct resources *res, u8 id) +{ + struct device *dev = to_device_index(csiphy, id); + struct platform_device *pdev = to_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: %d\n", ret); + 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: %ld\n", + clk_rate); + 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: %d\n", ret); + return ret; + } + + if (!strcmp(res->clock[i], "csiphy0_timer") || + !strcmp(res->clock[i], "csiphy1_timer")) + csiphy->timer_clk_rate = clk_rate; + } + } + + 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(local)) + return -EBUSY; + + sd = media_entity_to_v4l2_subdev(entity); + csiphy = v4l2_get_subdevdata(sd); + + sd = media_entity_to_v4l2_subdev(remote->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: %d\n", ret); + 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: %d\n", ret); + return ret; + } + + ret = v4l2_device_register_subdev(v4l2_dev, sd); + if (ret < 0) { + dev_err(dev, "Failed to register subdev: %d\n", ret); + 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/camss-csiphy.h b/drivers/media/platform/qcom/camss-8x16/camss-csiphy.h new file mode 100644 index 0000000..a6f23ed --- /dev/null +++ b/drivers/media/platform/qcom/camss-8x16/camss-csiphy.h @@ -0,0 +1,77 @@ +/* + * camss-csiphy.h + * + * Qualcomm MSM Camera Subsystem - CSIPHY Module + * + * Copyright (c) 2011-2015, The Linux Foundation. All rights reserved. + * Copyright (C) 2016-2017 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 { + 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; + long timer_clk_rate; + struct csiphy_config cfg; + struct v4l2_mbus_framefmt fmt[MSM_CSIPHY_PADS_NUM]; +}; + +struct resources; + +int msm_csiphy_subdev_init(struct csiphy_device *csiphy, + const 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 */
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> --- .../media/platform/qcom/camss-8x16/camss-csiphy.c | 816 +++++++++++++++++++++ .../media/platform/qcom/camss-8x16/camss-csiphy.h | 77 ++ 2 files changed, 893 insertions(+) create mode 100644 drivers/media/platform/qcom/camss-8x16/camss-csiphy.c create mode 100644 drivers/media/platform/qcom/camss-8x16/camss-csiphy.h -- 2.7.4