// SPDX-License-Identifier: GPL-2.0 /* * camss-csid.c * * Qualcomm MSM Camera Subsystem - CSID (CSI Decoder) Module * * Copyright (c) 2011-2015, The Linux Foundation. All rights reserved. * Copyright (C) 2015-2018 Linaro Ltd. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "camss-csid.h" #include "camss-csid-gen1.h" #include "camss.h" /* offset of CSID registers in VFE region for VFE 480 */ #define VFE_480_CSID_OFFSET 0x1200 #define VFE_480_LITE_CSID_OFFSET 0x200 #define MSM_CSID_NAME "msm_csid" const char * const csid_testgen_modes[] = { "Disabled", "Incrementing", "Alternating 0x55/0xAA", "All Zeros 0x00", "All Ones 0xFF", "Pseudo-random Data", "User Specified", "Complex pattern", "Color box", "Color bars", NULL }; u32 csid_find_code(u32 *codes, unsigned int ncodes, unsigned int match_format_idx, u32 match_code) { int i; if (!match_code && (match_format_idx >= ncodes)) return 0; for (i = 0; i < ncodes; i++) if (match_code) { if (codes[i] == match_code) return match_code; } else { if (i == match_format_idx) return codes[i]; } return codes[0]; } const struct csid_format *csid_get_fmt_entry(const struct csid_format *formats, unsigned int nformats, u32 code) { unsigned int i; for (i = 0; i < nformats; i++) if (code == formats[i].code) return &formats[i]; WARN(1, "Unknown format\n"); return &formats[0]; } /* * csid_set_clock_rates - Calculate and set clock rates on CSID module * @csiphy: CSID device */ static int csid_set_clock_rates(struct csid_device *csid) { struct device *dev = csid->camss->dev; const struct csid_format *fmt; s64 link_freq; int i, j; int ret; fmt = csid_get_fmt_entry(csid->formats, csid->nformats, csid->fmt[MSM_CSIPHY_PAD_SINK].code); link_freq = camss_get_link_freq(&csid->subdev.entity, fmt->bpp, csid->phy.lane_cnt); if (link_freq < 0) link_freq = 0; for (i = 0; i < csid->nclocks; i++) { struct camss_clock *clock = &csid->clock[i]; if (!strcmp(clock->name, "csi0") || !strcmp(clock->name, "csi1") || !strcmp(clock->name, "csi2") || !strcmp(clock->name, "csi3")) { u64 min_rate = link_freq / 4; long rate; camss_add_clock_margin(&min_rate); for (j = 0; j < clock->nfreqs; j++) if (min_rate < clock->freq[j]) break; if (j == clock->nfreqs) { dev_err(dev, "Pixel clock is too high for CSID\n"); return -EINVAL; } /* if sensor pixel clock is not available */ /* set highest possible CSID clock rate */ if (min_rate == 0) j = clock->nfreqs - 1; rate = clk_round_rate(clock->clk, clock->freq[j]); if (rate < 0) { dev_err(dev, "clk round rate failed: %ld\n", rate); return -EINVAL; } ret = clk_set_rate(clock->clk, rate); if (ret < 0) { dev_err(dev, "clk set rate failed: %d\n", ret); return ret; } } else if (clock->nfreqs) { clk_set_rate(clock->clk, clock->freq[0]); } } return 0; } /* * csid_set_power - Power on/off CSID module * @sd: CSID V4L2 subdevice * @on: Requested power state * * Return 0 on success or a negative error code otherwise */ static int csid_set_power(struct v4l2_subdev *sd, int on) { struct csid_device *csid = v4l2_get_subdevdata(sd); struct camss *camss = csid->camss; struct device *dev = camss->dev; struct vfe_device *vfe = &camss->vfe[csid->id]; u32 version = camss->version; int ret = 0; if (on) { if (version == CAMSS_8250 || version == CAMSS_845) { ret = vfe_get(vfe); if (ret < 0) return ret; } ret = pm_runtime_resume_and_get(dev); if (ret < 0) return ret; ret = regulator_bulk_enable(csid->num_supplies, csid->supplies); if (ret < 0) { pm_runtime_put_sync(dev); return ret; } ret = csid_set_clock_rates(csid); if (ret < 0) { regulator_bulk_disable(csid->num_supplies, csid->supplies); pm_runtime_put_sync(dev); return ret; } ret = camss_enable_clocks(csid->nclocks, csid->clock, dev); if (ret < 0) { regulator_bulk_disable(csid->num_supplies, csid->supplies); pm_runtime_put_sync(dev); return ret; } enable_irq(csid->irq); ret = csid->ops->reset(csid); if (ret < 0) { disable_irq(csid->irq); camss_disable_clocks(csid->nclocks, csid->clock); regulator_bulk_disable(csid->num_supplies, csid->supplies); pm_runtime_put_sync(dev); return ret; } csid->ops->hw_version(csid); } else { disable_irq(csid->irq); camss_disable_clocks(csid->nclocks, csid->clock); regulator_bulk_disable(csid->num_supplies, csid->supplies); pm_runtime_put_sync(dev); if (version == CAMSS_8250 || version == CAMSS_845) vfe_put(vfe); } return ret; } /* * csid_set_stream - Enable/disable streaming on CSID module * @sd: CSID V4L2 subdevice * @enable: Requested streaming state * * Main configuration of CSID module is also done here. * * Return 0 on success or a negative error code otherwise */ static int csid_set_stream(struct v4l2_subdev *sd, int enable) { struct csid_device *csid = v4l2_get_subdevdata(sd); int ret; if (enable) { ret = v4l2_ctrl_handler_setup(&csid->ctrls); if (ret < 0) { dev_err(csid->camss->dev, "could not sync v4l2 controls: %d\n", ret); return ret; } if (!csid->testgen.enabled && !media_entity_remote_pad(&csid->pads[MSM_CSID_PAD_SINK])) return -ENOLINK; } csid->ops->configure_stream(csid, enable); return 0; } /* * __csid_get_format - Get pointer to format structure * @csid: CSID 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 * __csid_get_format(struct csid_device *csid, struct v4l2_subdev_state *sd_state, unsigned int pad, enum v4l2_subdev_format_whence which) { if (which == V4L2_SUBDEV_FORMAT_TRY) return v4l2_subdev_get_try_format(&csid->subdev, sd_state, pad); return &csid->fmt[pad]; } /* * csid_try_format - Handle try format by pad subdev method * @csid: CSID 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 csid_try_format(struct csid_device *csid, struct v4l2_subdev_state *sd_state, unsigned int pad, struct v4l2_mbus_framefmt *fmt, enum v4l2_subdev_format_whence which) { unsigned int i; switch (pad) { case MSM_CSID_PAD_SINK: /* Set format on sink pad */ for (i = 0; i < csid->nformats; i++) if (fmt->code == csid->formats[i].code) break; /* If not found, use UYVY as default */ if (i >= csid->nformats) 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); fmt->field = V4L2_FIELD_NONE; fmt->colorspace = V4L2_COLORSPACE_SRGB; break; case MSM_CSID_PAD_SRC: if (csid->testgen_mode->cur.val == 0) { /* Test generator is disabled, */ /* keep pad formats in sync */ u32 code = fmt->code; *fmt = *__csid_get_format(csid, sd_state, MSM_CSID_PAD_SINK, which); fmt->code = csid->ops->src_pad_code(csid, fmt->code, 0, code); } else { /* Test generator is enabled, set format on source */ /* pad to allow test generator usage */ for (i = 0; i < csid->nformats; i++) if (csid->formats[i].code == fmt->code) break; /* If not found, use UYVY as default */ if (i >= csid->nformats) 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); fmt->field = V4L2_FIELD_NONE; } break; } fmt->colorspace = V4L2_COLORSPACE_SRGB; } /* * csid_enum_mbus_code - Handle pixel format enumeration * @sd: CSID V4L2 subdevice * @cfg: V4L2 subdev pad configuration * @code: pointer to v4l2_subdev_mbus_code_enum structure * return -EINVAL or zero on success */ static int csid_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_mbus_code_enum *code) { struct csid_device *csid = v4l2_get_subdevdata(sd); if (code->pad == MSM_CSID_PAD_SINK) { if (code->index >= csid->nformats) return -EINVAL; code->code = csid->formats[code->index].code; } else { if (csid->testgen_mode->cur.val == 0) { struct v4l2_mbus_framefmt *sink_fmt; sink_fmt = __csid_get_format(csid, sd_state, MSM_CSID_PAD_SINK, code->which); code->code = csid->ops->src_pad_code(csid, sink_fmt->code, code->index, 0); if (!code->code) return -EINVAL; } else { if (code->index >= csid->nformats) return -EINVAL; code->code = csid->formats[code->index].code; } } return 0; } /* * csid_enum_frame_size - Handle frame size enumeration * @sd: CSID V4L2 subdevice * @cfg: V4L2 subdev pad configuration * @fse: pointer to v4l2_subdev_frame_size_enum structure * return -EINVAL or zero on success */ static int csid_enum_frame_size(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_frame_size_enum *fse) { struct csid_device *csid = 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; csid_try_format(csid, sd_state, 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; csid_try_format(csid, sd_state, fse->pad, &format, fse->which); fse->max_width = format.width; fse->max_height = format.height; return 0; } /* * csid_get_format - Handle get format by pads subdev method * @sd: CSID V4L2 subdevice * @cfg: V4L2 subdev pad configuration * @fmt: pointer to v4l2 subdev format structure * * Return -EINVAL or zero on success */ static int csid_get_format(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *fmt) { struct csid_device *csid = v4l2_get_subdevdata(sd); struct v4l2_mbus_framefmt *format; format = __csid_get_format(csid, sd_state, fmt->pad, fmt->which); if (format == NULL) return -EINVAL; fmt->format = *format; return 0; } /* * csid_set_format - Handle set format by pads subdev method * @sd: CSID V4L2 subdevice * @cfg: V4L2 subdev pad configuration * @fmt: pointer to v4l2 subdev format structure * * Return -EINVAL or zero on success */ static int csid_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state, struct v4l2_subdev_format *fmt) { struct csid_device *csid = v4l2_get_subdevdata(sd); struct v4l2_mbus_framefmt *format; format = __csid_get_format(csid, sd_state, fmt->pad, fmt->which); if (format == NULL) return -EINVAL; csid_try_format(csid, sd_state, fmt->pad, &fmt->format, fmt->which); *format = fmt->format; /* Propagate the format from sink to source */ if (fmt->pad == MSM_CSID_PAD_SINK) { format = __csid_get_format(csid, sd_state, MSM_CSID_PAD_SRC, fmt->which); *format = fmt->format; csid_try_format(csid, sd_state, MSM_CSID_PAD_SRC, format, fmt->which); } return 0; } /* * csid_init_formats - Initialize formats on all pads * @sd: CSID 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 csid_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) { struct v4l2_subdev_format format = { .pad = MSM_CSID_PAD_SINK, .which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE, .format = { .code = MEDIA_BUS_FMT_UYVY8_2X8, .width = 1920, .height = 1080 } }; return csid_set_format(sd, fh ? fh->state : NULL, &format); } /* * csid_set_test_pattern - Set test generator's pattern mode * @csid: CSID device * @value: desired test pattern mode * * Return 0 on success or a negative error code otherwise */ static int csid_set_test_pattern(struct csid_device *csid, s32 value) { struct csid_testgen_config *tg = &csid->testgen; /* If CSID is linked to CSIPHY, do not allow to enable test generator */ if (value && media_entity_remote_pad(&csid->pads[MSM_CSID_PAD_SINK])) return -EBUSY; tg->enabled = !!value; return csid->ops->configure_testgen_pattern(csid, value); } /* * csid_s_ctrl - Handle set control subdev method * @ctrl: pointer to v4l2 control structure * * Return 0 on success or a negative error code otherwise */ static int csid_s_ctrl(struct v4l2_ctrl *ctrl) { struct csid_device *csid = container_of(ctrl->handler, struct csid_device, ctrls); int ret = -EINVAL; switch (ctrl->id) { case V4L2_CID_TEST_PATTERN: ret = csid_set_test_pattern(csid, ctrl->val); break; } return ret; } static const struct v4l2_ctrl_ops csid_ctrl_ops = { .s_ctrl = csid_s_ctrl, }; /* * msm_csid_subdev_init - Initialize CSID device structure and resources * @csid: CSID device * @res: CSID module resources table * @id: CSID module id * * Return 0 on success or a negative error code otherwise */ int msm_csid_subdev_init(struct camss *camss, struct csid_device *csid, const struct resources *res, u8 id) { struct device *dev = camss->dev; struct platform_device *pdev = to_platform_device(dev); int i, j; int ret; csid->camss = camss; csid->id = id; if (camss->version == CAMSS_8x16) { csid->ops = &csid_ops_4_1; } else if (camss->version == CAMSS_8x96 || camss->version == CAMSS_660) { csid->ops = &csid_ops_4_7; } else if (camss->version == CAMSS_845 || camss->version == CAMSS_8250) { csid->ops = &csid_ops_gen2; } else { return -EINVAL; } csid->ops->subdev_init(csid); /* Memory */ if (camss->version == CAMSS_8250) { /* for titan 480, CSID registers are inside the VFE region, * between the VFE "top" and "bus" registers. this requires * VFE to be initialized before CSID */ if (id >= 2) /* VFE/CSID lite */ csid->base = camss->vfe[id].base + VFE_480_LITE_CSID_OFFSET; else csid->base = camss->vfe[id].base + VFE_480_CSID_OFFSET; } else { csid->base = devm_platform_ioremap_resource_byname(pdev, res->reg[0]); if (IS_ERR(csid->base)) return PTR_ERR(csid->base); } /* Interrupt */ ret = platform_get_irq_byname(pdev, res->interrupt[0]); if (ret < 0) return ret; csid->irq = ret; snprintf(csid->irq_name, sizeof(csid->irq_name), "%s_%s%d", dev_name(dev), MSM_CSID_NAME, csid->id); ret = devm_request_irq(dev, csid->irq, csid->ops->isr, IRQF_TRIGGER_RISING | IRQF_NO_AUTOEN, csid->irq_name, csid); if (ret < 0) { dev_err(dev, "request_irq failed: %d\n", ret); return ret; } /* Clocks */ csid->nclocks = 0; while (res->clock[csid->nclocks]) csid->nclocks++; csid->clock = devm_kcalloc(dev, csid->nclocks, sizeof(*csid->clock), GFP_KERNEL); if (!csid->clock) return -ENOMEM; for (i = 0; i < csid->nclocks; i++) { struct camss_clock *clock = &csid->clock[i]; clock->clk = devm_clk_get(dev, res->clock[i]); if (IS_ERR(clock->clk)) return PTR_ERR(clock->clk); clock->name = res->clock[i]; clock->nfreqs = 0; while (res->clock_rate[i][clock->nfreqs]) clock->nfreqs++; if (!clock->nfreqs) { clock->freq = NULL; continue; } clock->freq = devm_kcalloc(dev, clock->nfreqs, sizeof(*clock->freq), GFP_KERNEL); if (!clock->freq) return -ENOMEM; for (j = 0; j < clock->nfreqs; j++) clock->freq[j] = res->clock_rate[i][j]; } /* Regulator */ for (i = 0; i < ARRAY_SIZE(res->regulators); i++) { if (res->regulators[i]) csid->num_supplies++; } if (csid->num_supplies) { csid->supplies = devm_kmalloc_array(camss->dev, csid->num_supplies, sizeof(csid->supplies), GFP_KERNEL); if (!csid->supplies) return -ENOMEM; } for (i = 0; i < csid->num_supplies; i++) csid->supplies[i].supply = res->regulators[i]; ret = devm_regulator_bulk_get(camss->dev, csid->num_supplies, csid->supplies); if (ret) return ret; init_completion(&csid->reset_complete); return 0; } /* * msm_csid_get_csid_id - Get CSID HW module id * @entity: Pointer to CSID media entity structure * @id: Return CSID HW module id here */ void msm_csid_get_csid_id(struct media_entity *entity, u8 *id) { struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity); struct csid_device *csid = v4l2_get_subdevdata(sd); *id = csid->id; } /* * csid_get_lane_assign - Calculate CSI2 lane assign configuration parameter * @lane_cfg - CSI2 lane configuration * * Return lane assign */ static u32 csid_get_lane_assign(struct csiphy_lanes_cfg *lane_cfg) { u32 lane_assign = 0; int i; for (i = 0; i < lane_cfg->num_data; i++) lane_assign |= lane_cfg->data[i].pos << (i * 4); return lane_assign; } /* * csid_link_setup - Setup CSID connections * @entity: Pointer to media entity structure * @local: Pointer to local pad * @remote: Pointer to remote pad * @flags: Link flags * * Return 0 on success */ static int csid_link_setup(struct media_entity *entity, const struct media_pad *local, const struct media_pad *remote, u32 flags) { if (flags & MEDIA_LNK_FL_ENABLED) if (media_entity_remote_pad(local)) return -EBUSY; if ((local->flags & MEDIA_PAD_FL_SINK) && (flags & MEDIA_LNK_FL_ENABLED)) { struct v4l2_subdev *sd; struct csid_device *csid; struct csiphy_device *csiphy; struct csiphy_lanes_cfg *lane_cfg; struct v4l2_subdev_format format = { 0 }; sd = media_entity_to_v4l2_subdev(entity); csid = v4l2_get_subdevdata(sd); /* If test generator is enabled */ /* do not allow a link from CSIPHY to CSID */ if (csid->testgen_mode->cur.val != 0) return -EBUSY; sd = media_entity_to_v4l2_subdev(remote->entity); csiphy = v4l2_get_subdevdata(sd); /* If a sensor is not linked to CSIPHY */ /* do no allow a link from CSIPHY to CSID */ if (!csiphy->cfg.csi2) return -EPERM; csid->phy.csiphy_id = csiphy->id; lane_cfg = &csiphy->cfg.csi2->lane_cfg; csid->phy.lane_cnt = lane_cfg->num_data; csid->phy.lane_assign = csid_get_lane_assign(lane_cfg); /* Reset format on source pad to sink pad format */ format.pad = MSM_CSID_PAD_SRC; format.which = V4L2_SUBDEV_FORMAT_ACTIVE; csid_set_format(&csid->subdev, NULL, &format); } return 0; } static const struct v4l2_subdev_core_ops csid_core_ops = { .s_power = csid_set_power, .subscribe_event = v4l2_ctrl_subdev_subscribe_event, .unsubscribe_event = v4l2_event_subdev_unsubscribe, }; static const struct v4l2_subdev_video_ops csid_video_ops = { .s_stream = csid_set_stream, }; static const struct v4l2_subdev_pad_ops csid_pad_ops = { .enum_mbus_code = csid_enum_mbus_code, .enum_frame_size = csid_enum_frame_size, .get_fmt = csid_get_format, .set_fmt = csid_set_format, }; static const struct v4l2_subdev_ops csid_v4l2_ops = { .core = &csid_core_ops, .video = &csid_video_ops, .pad = &csid_pad_ops, }; static const struct v4l2_subdev_internal_ops csid_v4l2_internal_ops = { .open = csid_init_formats, }; static const struct media_entity_operations csid_media_ops = { .link_setup = csid_link_setup, .link_validate = v4l2_subdev_link_validate, }; /* * msm_csid_register_entity - Register subdev node for CSID module * @csid: CSID device * @v4l2_dev: V4L2 device * * Return 0 on success or a negative error code otherwise */ int msm_csid_register_entity(struct csid_device *csid, struct v4l2_device *v4l2_dev) { struct v4l2_subdev *sd = &csid->subdev; struct media_pad *pads = csid->pads; struct device *dev = csid->camss->dev; int ret; v4l2_subdev_init(sd, &csid_v4l2_ops); sd->internal_ops = &csid_v4l2_internal_ops; sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; snprintf(sd->name, ARRAY_SIZE(sd->name), "%s%d", MSM_CSID_NAME, csid->id); v4l2_set_subdevdata(sd, csid); ret = v4l2_ctrl_handler_init(&csid->ctrls, 1); if (ret < 0) { dev_err(dev, "Failed to init ctrl handler: %d\n", ret); return ret; } csid->testgen_mode = v4l2_ctrl_new_std_menu_items(&csid->ctrls, &csid_ctrl_ops, V4L2_CID_TEST_PATTERN, csid->testgen.nmodes, 0, 0, csid->testgen.modes); if (csid->ctrls.error) { dev_err(dev, "Failed to init ctrl: %d\n", csid->ctrls.error); ret = csid->ctrls.error; goto free_ctrl; } csid->subdev.ctrl_handler = &csid->ctrls; ret = csid_init_formats(sd, NULL); if (ret < 0) { dev_err(dev, "Failed to init format: %d\n", ret); goto free_ctrl; } pads[MSM_CSID_PAD_SINK].flags = MEDIA_PAD_FL_SINK; pads[MSM_CSID_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE; sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER; sd->entity.ops = &csid_media_ops; ret = media_entity_pads_init(&sd->entity, MSM_CSID_PADS_NUM, pads); if (ret < 0) { dev_err(dev, "Failed to init media entity: %d\n", ret); goto free_ctrl; } ret = v4l2_device_register_subdev(v4l2_dev, sd); if (ret < 0) { dev_err(dev, "Failed to register subdev: %d\n", ret); goto media_cleanup; } return 0; media_cleanup: media_entity_cleanup(&sd->entity); free_ctrl: v4l2_ctrl_handler_free(&csid->ctrls); return ret; } /* * msm_csid_unregister_entity - Unregister CSID module subdev node * @csid: CSID device */ void msm_csid_unregister_entity(struct csid_device *csid) { v4l2_device_unregister_subdev(&csid->subdev); media_entity_cleanup(&csid->subdev.entity); v4l2_ctrl_handler_free(&csid->ctrls); }