/* * camss-csid.c * * Qualcomm MSM Camera Subsystem - CSID (CSI Decoder) Module * * Copyright (c) 2011-2015, The Linux Foundation. All rights reserved. * Copyright (C) 2015-2017 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 #include #include #include #include #include #include #include #include #include #include "camss-csid.h" #include "camss.h" #define MSM_CSID_NAME "msm_csid" #define CAMSS_CSID_HW_VERSION 0x0 #define CAMSS_CSID_CORE_CTRL_0 0x004 #define CAMSS_CSID_CORE_CTRL_1 0x008 #define CAMSS_CSID_RST_CMD 0x00c #define CAMSS_CSID_CID_LUT_VC_n(n) (0x010 + 0x4 * (n)) #define CAMSS_CSID_CID_n_CFG(n) (0x020 + 0x4 * (n)) #define CAMSS_CSID_IRQ_CLEAR_CMD 0x060 #define CAMSS_CSID_IRQ_MASK 0x064 #define CAMSS_CSID_IRQ_STATUS 0x068 #define CAMSS_CSID_TG_CTRL 0x0a0 #define CAMSS_CSID_TG_CTRL_DISABLE 0xa06436 #define CAMSS_CSID_TG_CTRL_ENABLE 0xa06437 #define CAMSS_CSID_TG_VC_CFG 0x0a4 #define CAMSS_CSID_TG_VC_CFG_H_BLANKING 0x3ff #define CAMSS_CSID_TG_VC_CFG_V_BLANKING 0x7f #define CAMSS_CSID_TG_DT_n_CGG_0(n) (0x0ac + 0xc * (n)) #define CAMSS_CSID_TG_DT_n_CGG_1(n) (0x0b0 + 0xc * (n)) #define CAMSS_CSID_TG_DT_n_CGG_2(n) (0x0b4 + 0xc * (n)) #define DATA_TYPE_EMBEDDED_DATA_8BIT 0x12 #define DATA_TYPE_YUV422_8BIT 0x1e #define DATA_TYPE_RAW_6BIT 0x28 #define DATA_TYPE_RAW_8BIT 0x2a #define DATA_TYPE_RAW_10BIT 0x2b #define DATA_TYPE_RAW_12BIT 0x2c #define DECODE_FORMAT_UNCOMPRESSED_6_BIT 0x0 #define DECODE_FORMAT_UNCOMPRESSED_8_BIT 0x1 #define DECODE_FORMAT_UNCOMPRESSED_10_BIT 0x2 #define DECODE_FORMAT_UNCOMPRESSED_12_BIT 0x3 #define CSID_RESET_TIMEOUT_MS 500 struct csid_fmts { u32 code; u8 data_type; u8 decode_format; u8 bpp; u8 spp; /* bus samples per pixel */ }; static const struct csid_fmts csid_input_fmts[] = { { MEDIA_BUS_FMT_UYVY8_2X8, DATA_TYPE_YUV422_8BIT, DECODE_FORMAT_UNCOMPRESSED_8_BIT, 8, 2, }, { MEDIA_BUS_FMT_VYUY8_2X8, DATA_TYPE_YUV422_8BIT, DECODE_FORMAT_UNCOMPRESSED_8_BIT, 8, 2, }, { MEDIA_BUS_FMT_YUYV8_2X8, DATA_TYPE_YUV422_8BIT, DECODE_FORMAT_UNCOMPRESSED_8_BIT, 8, 2, }, { MEDIA_BUS_FMT_YVYU8_2X8, DATA_TYPE_YUV422_8BIT, DECODE_FORMAT_UNCOMPRESSED_8_BIT, 8, 2, }, { MEDIA_BUS_FMT_SBGGR8_1X8, DATA_TYPE_RAW_8BIT, DECODE_FORMAT_UNCOMPRESSED_8_BIT, 8, 1, }, { MEDIA_BUS_FMT_SGBRG8_1X8, DATA_TYPE_RAW_8BIT, DECODE_FORMAT_UNCOMPRESSED_8_BIT, 8, 1, }, { MEDIA_BUS_FMT_SGRBG8_1X8, DATA_TYPE_RAW_8BIT, DECODE_FORMAT_UNCOMPRESSED_8_BIT, 8, 1, }, { MEDIA_BUS_FMT_SRGGB8_1X8, DATA_TYPE_RAW_8BIT, DECODE_FORMAT_UNCOMPRESSED_8_BIT, 8, 1, }, { MEDIA_BUS_FMT_SBGGR10_1X10, DATA_TYPE_RAW_10BIT, DECODE_FORMAT_UNCOMPRESSED_10_BIT, 10, 1, }, { MEDIA_BUS_FMT_SGBRG10_1X10, DATA_TYPE_RAW_10BIT, DECODE_FORMAT_UNCOMPRESSED_10_BIT, 10, 1, }, { MEDIA_BUS_FMT_SGRBG10_1X10, DATA_TYPE_RAW_10BIT, DECODE_FORMAT_UNCOMPRESSED_10_BIT, 10, 1, }, { MEDIA_BUS_FMT_SRGGB10_1X10, DATA_TYPE_RAW_10BIT, DECODE_FORMAT_UNCOMPRESSED_10_BIT, 10, 1, }, { MEDIA_BUS_FMT_SBGGR12_1X12, DATA_TYPE_RAW_12BIT, DECODE_FORMAT_UNCOMPRESSED_12_BIT, 12, 1, }, { MEDIA_BUS_FMT_SGBRG12_1X12, DATA_TYPE_RAW_12BIT, DECODE_FORMAT_UNCOMPRESSED_12_BIT, 12, 1, }, { MEDIA_BUS_FMT_SGRBG12_1X12, DATA_TYPE_RAW_12BIT, DECODE_FORMAT_UNCOMPRESSED_12_BIT, 12, 1, }, { MEDIA_BUS_FMT_SRGGB12_1X12, DATA_TYPE_RAW_12BIT, DECODE_FORMAT_UNCOMPRESSED_12_BIT, 12, 1, } }; static const struct csid_fmts *csid_get_fmt_entry(u32 code) { unsigned int i; for (i = 0; i < ARRAY_SIZE(csid_input_fmts); i++) if (code == csid_input_fmts[i].code) return &csid_input_fmts[i]; WARN(1, "Unknown format\n"); return &csid_input_fmts[0]; } /* * csid_isr - CSID module interrupt handler * @irq: Interrupt line * @dev: CSID device * * Return IRQ_HANDLED on success */ static irqreturn_t csid_isr(int irq, void *dev) { struct csid_device *csid = dev; u32 value; value = readl_relaxed(csid->base + CAMSS_CSID_IRQ_STATUS); writel_relaxed(value, csid->base + CAMSS_CSID_IRQ_CLEAR_CMD); if ((value >> 11) & 0x1) complete(&csid->reset_complete); return IRQ_HANDLED; } /* * 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 = to_device_index(csid, csid->id); u32 pixel_clock; int i, j; int ret; ret = camss_get_pixel_clock(&csid->subdev.entity, &pixel_clock); if (ret) pixel_clock = 0; for (i = 0; i < csid->nclocks; i++) { struct camss_clock *clock = &csid->clock[i]; if (!strcmp(clock->name, "csi0") || !strcmp(clock->name, "csi1")) { u8 bpp = csid_get_fmt_entry( csid->fmt[MSM_CSIPHY_PAD_SINK].code)->bpp; u8 num_lanes = csid->phy.lane_cnt; u64 min_rate = pixel_clock * bpp / (2 * num_lanes * 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; } } } return 0; } /* * csid_reset - Trigger reset on CSID module and wait to complete * @csid: CSID device * * Return 0 on success or a negative error code otherwise */ static int csid_reset(struct csid_device *csid) { unsigned long time; reinit_completion(&csid->reset_complete); writel_relaxed(0x7fff, csid->base + CAMSS_CSID_RST_CMD); time = wait_for_completion_timeout(&csid->reset_complete, msecs_to_jiffies(CSID_RESET_TIMEOUT_MS)); if (!time) { dev_err(to_device_index(csid, csid->id), "CSID reset timeout\n"); return -EIO; } 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 device *dev = to_device_index(csid, csid->id); int ret; if (on) { u32 hw_version; ret = regulator_enable(csid->vdda); if (ret < 0) return ret; ret = csid_set_clock_rates(csid); if (ret < 0) { regulator_disable(csid->vdda); return ret; } ret = camss_enable_clocks(csid->nclocks, csid->clock, dev); if (ret < 0) { regulator_disable(csid->vdda); return ret; } enable_irq(csid->irq); ret = csid_reset(csid); if (ret < 0) { disable_irq(csid->irq); camss_disable_clocks(csid->nclocks, csid->clock); regulator_disable(csid->vdda); return ret; } hw_version = readl_relaxed(csid->base + CAMSS_CSID_HW_VERSION); dev_dbg(dev, "CSID HW Version = 0x%08x\n", hw_version); } else { disable_irq(csid->irq); camss_disable_clocks(csid->nclocks, csid->clock); ret = regulator_disable(csid->vdda); } 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); struct csid_testgen_config *tg = &csid->testgen; u32 val; if (enable) { u8 vc = 0; /* Virtual Channel 0 */ u8 cid = vc * 4; /* id of Virtual Channel and Data Type set */ u8 dt, dt_shift, df; int ret; ret = v4l2_ctrl_handler_setup(&csid->ctrls); if (ret < 0) { dev_err(to_device_index(csid, csid->id), "could not sync v4l2 controls: %d\n", ret); return ret; } if (!tg->enabled && !media_entity_remote_pad(&csid->pads[MSM_CSID_PAD_SINK])) return -ENOLINK; dt = csid_get_fmt_entry(csid->fmt[MSM_CSID_PAD_SRC].code)-> data_type; if (tg->enabled) { /* Config Test Generator */ struct v4l2_mbus_framefmt *f = &csid->fmt[MSM_CSID_PAD_SRC]; u8 bpp = csid_get_fmt_entry(f->code)->bpp; u8 spp = csid_get_fmt_entry(f->code)->spp; u32 num_bytes_per_line = f->width * bpp * spp / 8; u32 num_lines = f->height; /* 31:24 V blank, 23:13 H blank, 3:2 num of active DT */ /* 1:0 VC */ val = ((CAMSS_CSID_TG_VC_CFG_V_BLANKING & 0xff) << 24) | ((CAMSS_CSID_TG_VC_CFG_H_BLANKING & 0x7ff) << 13); writel_relaxed(val, csid->base + CAMSS_CSID_TG_VC_CFG); /* 28:16 bytes per lines, 12:0 num of lines */ val = ((num_bytes_per_line & 0x1fff) << 16) | (num_lines & 0x1fff); writel_relaxed(val, csid->base + CAMSS_CSID_TG_DT_n_CGG_0(0)); /* 5:0 data type */ val = dt; writel_relaxed(val, csid->base + CAMSS_CSID_TG_DT_n_CGG_1(0)); /* 2:0 output test pattern */ val = tg->payload_mode; writel_relaxed(val, csid->base + CAMSS_CSID_TG_DT_n_CGG_2(0)); } else { struct csid_phy_config *phy = &csid->phy; val = phy->lane_cnt - 1; val |= phy->lane_assign << 4; writel_relaxed(val, csid->base + CAMSS_CSID_CORE_CTRL_0); val = phy->csiphy_id << 17; val |= 0x9; writel_relaxed(val, csid->base + CAMSS_CSID_CORE_CTRL_1); } /* Config LUT */ dt_shift = (cid % 4) * 8; df = csid_get_fmt_entry(csid->fmt[MSM_CSID_PAD_SINK].code)-> decode_format; val = readl_relaxed(csid->base + CAMSS_CSID_CID_LUT_VC_n(vc)); val &= ~(0xff << dt_shift); val |= dt << dt_shift; writel_relaxed(val, csid->base + CAMSS_CSID_CID_LUT_VC_n(vc)); val = (df << 4) | 0x3; writel_relaxed(val, csid->base + CAMSS_CSID_CID_n_CFG(cid)); if (tg->enabled) { val = CAMSS_CSID_TG_CTRL_ENABLE; writel_relaxed(val, csid->base + CAMSS_CSID_TG_CTRL); } } else { if (tg->enabled) { val = CAMSS_CSID_TG_CTRL_DISABLE; writel_relaxed(val, csid->base + CAMSS_CSID_TG_CTRL); } } 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_pad_config *cfg, unsigned int pad, enum v4l2_subdev_format_whence which) { if (which == V4L2_SUBDEV_FORMAT_TRY) return v4l2_subdev_get_try_format(&csid->subdev, cfg, 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_pad_config *cfg, 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 < ARRAY_SIZE(csid_input_fmts); i++) if (fmt->code == csid_input_fmts[i].code) break; /* If not found, use UYVY as default */ if (i >= ARRAY_SIZE(csid_input_fmts)) 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 - set and return a format same as sink pad */ struct v4l2_mbus_framefmt format; format = *__csid_get_format(csid, cfg, MSM_CSID_PAD_SINK, which); *fmt = format; } else { /* Test generator is enabled, set format on source*/ /* pad to allow test generator usage */ for (i = 0; i < ARRAY_SIZE(csid_input_fmts); i++) if (csid_input_fmts[i].code == fmt->code) break; /* If not found, use UYVY as default */ if (i >= ARRAY_SIZE(csid_input_fmts)) 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_pad_config *cfg, struct v4l2_subdev_mbus_code_enum *code) { struct csid_device *csid = v4l2_get_subdevdata(sd); struct v4l2_mbus_framefmt *format; if (code->pad == MSM_CSID_PAD_SINK) { if (code->index >= ARRAY_SIZE(csid_input_fmts)) return -EINVAL; code->code = csid_input_fmts[code->index].code; } else { if (csid->testgen_mode->cur.val == 0) { if (code->index > 0) return -EINVAL; format = __csid_get_format(csid, cfg, MSM_CSID_PAD_SINK, code->which); code->code = format->code; } else { if (code->index >= ARRAY_SIZE(csid_input_fmts)) return -EINVAL; code->code = csid_input_fmts[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_pad_config *cfg, 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, 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; csid_try_format(csid, cfg, 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_pad_config *cfg, struct v4l2_subdev_format *fmt) { struct csid_device *csid = v4l2_get_subdevdata(sd); struct v4l2_mbus_framefmt *format; format = __csid_get_format(csid, cfg, 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_pad_config *cfg, struct v4l2_subdev_format *fmt) { struct csid_device *csid = v4l2_get_subdevdata(sd); struct v4l2_mbus_framefmt *format; format = __csid_get_format(csid, cfg, fmt->pad, fmt->which); if (format == NULL) return -EINVAL; csid_try_format(csid, cfg, 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, cfg, MSM_CSID_PAD_SRC, fmt->which); *format = fmt->format; csid_try_format(csid, cfg, 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->pad : NULL, &format); } static const char * const csid_test_pattern_menu[] = { "Disabled", "Incrementing", "Alternating 0x55/0xAA", "All Zeros 0x00", "All Ones 0xFF", "Pseudo-random Data", }; /* * 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; switch (value) { case 1: tg->payload_mode = CSID_PAYLOAD_MODE_INCREMENTING; break; case 2: tg->payload_mode = CSID_PAYLOAD_MODE_ALTERNATING_55_AA; break; case 3: tg->payload_mode = CSID_PAYLOAD_MODE_ALL_ZEROES; break; case 4: tg->payload_mode = CSID_PAYLOAD_MODE_ALL_ONES; break; case 5: tg->payload_mode = CSID_PAYLOAD_MODE_RANDOM; break; } return 0; } /* * 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 csid_device *csid, const struct resources *res, u8 id) { struct device *dev = to_device_index(csid, id); struct platform_device *pdev = to_platform_device(dev); struct resource *r; int i, j; int ret; csid->id = id; /* Memory */ r = platform_get_resource_byname(pdev, IORESOURCE_MEM, res->reg[0]); csid->base = devm_ioremap_resource(dev, r); if (IS_ERR(csid->base)) { dev_err(dev, "could not map memory\n"); return PTR_ERR(csid->base); } /* Interrupt */ r = platform_get_resource_byname(pdev, IORESOURCE_IRQ, res->interrupt[0]); if (!r) { dev_err(dev, "missing IRQ\n"); return -EINVAL; } csid->irq = r->start; 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_isr, IRQF_TRIGGER_RISING, csid->irq_name, csid); if (ret < 0) { dev_err(dev, "request_irq failed: %d\n", ret); return ret; } disable_irq(csid->irq); /* Clocks */ csid->nclocks = 0; while (res->clock[csid->nclocks]) csid->nclocks++; csid->clock = devm_kzalloc(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_kzalloc(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 */ csid->vdda = devm_regulator_get(dev, res->regulator[0]); if (IS_ERR(csid->vdda)) { dev_err(dev, "could not get regulator\n"); return PTR_ERR(csid->vdda); } 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, }; 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 = to_device_index(csid, csid->id); int ret; v4l2_subdev_init(sd, &csid_v4l2_ops); sd->internal_ops = &csid_v4l2_internal_ops; sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; 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, ARRAY_SIZE(csid_test_pattern_menu) - 1, 0, 0, csid_test_pattern_menu); 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_IO_V4L; 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); }