/* * ispccdc.c * * TI OMAP3 ISP - CCDC module * * Copyright (C) 2009-2010 Nokia Corporation * Copyright (C) 2009 Texas Instruments, Inc. * * Contacts: Laurent Pinchart * Sakari Ailus * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA */ #include #include #include #include #include #include #include #include #include #include "isp.h" #include "ispreg.h" #include "ispccdc.h" #define CCDC_MIN_WIDTH 32 #define CCDC_MIN_HEIGHT 32 static struct v4l2_mbus_framefmt * __ccdc_get_format(struct isp_ccdc_device *ccdc, struct v4l2_subdev_fh *fh, unsigned int pad, enum v4l2_subdev_format_whence which); static const unsigned int ccdc_fmts[] = { V4L2_MBUS_FMT_Y8_1X8, V4L2_MBUS_FMT_Y10_1X10, V4L2_MBUS_FMT_Y12_1X12, V4L2_MBUS_FMT_SGRBG8_1X8, V4L2_MBUS_FMT_SRGGB8_1X8, V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_MBUS_FMT_SGBRG8_1X8, V4L2_MBUS_FMT_SGRBG10_1X10, V4L2_MBUS_FMT_SRGGB10_1X10, V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_MBUS_FMT_SGBRG10_1X10, V4L2_MBUS_FMT_SGRBG12_1X12, V4L2_MBUS_FMT_SRGGB12_1X12, V4L2_MBUS_FMT_SBGGR12_1X12, V4L2_MBUS_FMT_SGBRG12_1X12, }; /* * ccdc_print_status - Print current CCDC Module register values. * @ccdc: Pointer to ISP CCDC device. * * Also prints other debug information stored in the CCDC module. */ #define CCDC_PRINT_REGISTER(isp, name)\ dev_dbg(isp->dev, "###CCDC " #name "=0x%08x\n", \ isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_##name)) static void ccdc_print_status(struct isp_ccdc_device *ccdc) { struct isp_device *isp = to_isp_device(ccdc); dev_dbg(isp->dev, "-------------CCDC Register dump-------------\n"); CCDC_PRINT_REGISTER(isp, PCR); CCDC_PRINT_REGISTER(isp, SYN_MODE); CCDC_PRINT_REGISTER(isp, HD_VD_WID); CCDC_PRINT_REGISTER(isp, PIX_LINES); CCDC_PRINT_REGISTER(isp, HORZ_INFO); CCDC_PRINT_REGISTER(isp, VERT_START); CCDC_PRINT_REGISTER(isp, VERT_LINES); CCDC_PRINT_REGISTER(isp, CULLING); CCDC_PRINT_REGISTER(isp, HSIZE_OFF); CCDC_PRINT_REGISTER(isp, SDOFST); CCDC_PRINT_REGISTER(isp, SDR_ADDR); CCDC_PRINT_REGISTER(isp, CLAMP); CCDC_PRINT_REGISTER(isp, DCSUB); CCDC_PRINT_REGISTER(isp, COLPTN); CCDC_PRINT_REGISTER(isp, BLKCMP); CCDC_PRINT_REGISTER(isp, FPC); CCDC_PRINT_REGISTER(isp, FPC_ADDR); CCDC_PRINT_REGISTER(isp, VDINT); CCDC_PRINT_REGISTER(isp, ALAW); CCDC_PRINT_REGISTER(isp, REC656IF); CCDC_PRINT_REGISTER(isp, CFG); CCDC_PRINT_REGISTER(isp, FMTCFG); CCDC_PRINT_REGISTER(isp, FMT_HORZ); CCDC_PRINT_REGISTER(isp, FMT_VERT); CCDC_PRINT_REGISTER(isp, PRGEVEN0); CCDC_PRINT_REGISTER(isp, PRGEVEN1); CCDC_PRINT_REGISTER(isp, PRGODD0); CCDC_PRINT_REGISTER(isp, PRGODD1); CCDC_PRINT_REGISTER(isp, VP_OUT); CCDC_PRINT_REGISTER(isp, LSC_CONFIG); CCDC_PRINT_REGISTER(isp, LSC_INITIAL); CCDC_PRINT_REGISTER(isp, LSC_TABLE_BASE); CCDC_PRINT_REGISTER(isp, LSC_TABLE_OFFSET); dev_dbg(isp->dev, "--------------------------------------------\n"); } /* * omap3isp_ccdc_busy - Get busy state of the CCDC. * @ccdc: Pointer to ISP CCDC device. */ int omap3isp_ccdc_busy(struct isp_ccdc_device *ccdc) { struct isp_device *isp = to_isp_device(ccdc); return isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_PCR) & ISPCCDC_PCR_BUSY; } /* ----------------------------------------------------------------------------- * Lens Shading Compensation */ /* * ccdc_lsc_validate_config - Check that LSC configuration is valid. * @ccdc: Pointer to ISP CCDC device. * @lsc_cfg: the LSC configuration to check. * * Returns 0 if the LSC configuration is valid, or -EINVAL if invalid. */ static int ccdc_lsc_validate_config(struct isp_ccdc_device *ccdc, struct omap3isp_ccdc_lsc_config *lsc_cfg) { struct isp_device *isp = to_isp_device(ccdc); struct v4l2_mbus_framefmt *format; unsigned int paxel_width, paxel_height; unsigned int paxel_shift_x, paxel_shift_y; unsigned int min_width, min_height, min_size; unsigned int input_width, input_height; paxel_shift_x = lsc_cfg->gain_mode_m; paxel_shift_y = lsc_cfg->gain_mode_n; if ((paxel_shift_x < 2) || (paxel_shift_x > 6) || (paxel_shift_y < 2) || (paxel_shift_y > 6)) { dev_dbg(isp->dev, "CCDC: LSC: Invalid paxel size\n"); return -EINVAL; } if (lsc_cfg->offset & 3) { dev_dbg(isp->dev, "CCDC: LSC: Offset must be a multiple of " "4\n"); return -EINVAL; } if ((lsc_cfg->initial_x & 1) || (lsc_cfg->initial_y & 1)) { dev_dbg(isp->dev, "CCDC: LSC: initial_x and y must be even\n"); return -EINVAL; } format = __ccdc_get_format(ccdc, NULL, CCDC_PAD_SINK, V4L2_SUBDEV_FORMAT_ACTIVE); input_width = format->width; input_height = format->height; /* Calculate minimum bytesize for validation */ paxel_width = 1 << paxel_shift_x; min_width = ((input_width + lsc_cfg->initial_x + paxel_width - 1) >> paxel_shift_x) + 1; paxel_height = 1 << paxel_shift_y; min_height = ((input_height + lsc_cfg->initial_y + paxel_height - 1) >> paxel_shift_y) + 1; min_size = 4 * min_width * min_height; if (min_size > lsc_cfg->size) { dev_dbg(isp->dev, "CCDC: LSC: too small table\n"); return -EINVAL; } if (lsc_cfg->offset < (min_width * 4)) { dev_dbg(isp->dev, "CCDC: LSC: Offset is too small\n"); return -EINVAL; } if ((lsc_cfg->size / lsc_cfg->offset) < min_height) { dev_dbg(isp->dev, "CCDC: LSC: Wrong size/offset combination\n"); return -EINVAL; } return 0; } /* * ccdc_lsc_program_table - Program Lens Shading Compensation table address. * @ccdc: Pointer to ISP CCDC device. */ static void ccdc_lsc_program_table(struct isp_ccdc_device *ccdc, u32 addr) { isp_reg_writel(to_isp_device(ccdc), addr, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_LSC_TABLE_BASE); } /* * ccdc_lsc_setup_regs - Configures the lens shading compensation module * @ccdc: Pointer to ISP CCDC device. */ static void ccdc_lsc_setup_regs(struct isp_ccdc_device *ccdc, struct omap3isp_ccdc_lsc_config *cfg) { struct isp_device *isp = to_isp_device(ccdc); int reg; isp_reg_writel(isp, cfg->offset, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_LSC_TABLE_OFFSET); reg = 0; reg |= cfg->gain_mode_n << ISPCCDC_LSC_GAIN_MODE_N_SHIFT; reg |= cfg->gain_mode_m << ISPCCDC_LSC_GAIN_MODE_M_SHIFT; reg |= cfg->gain_format << ISPCCDC_LSC_GAIN_FORMAT_SHIFT; isp_reg_writel(isp, reg, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_LSC_CONFIG); reg = 0; reg &= ~ISPCCDC_LSC_INITIAL_X_MASK; reg |= cfg->initial_x << ISPCCDC_LSC_INITIAL_X_SHIFT; reg &= ~ISPCCDC_LSC_INITIAL_Y_MASK; reg |= cfg->initial_y << ISPCCDC_LSC_INITIAL_Y_SHIFT; isp_reg_writel(isp, reg, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_LSC_INITIAL); } static int ccdc_lsc_wait_prefetch(struct isp_ccdc_device *ccdc) { struct isp_device *isp = to_isp_device(ccdc); unsigned int wait; isp_reg_writel(isp, IRQ0STATUS_CCDC_LSC_PREF_COMP_IRQ, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0STATUS); /* timeout 1 ms */ for (wait = 0; wait < 1000; wait++) { if (isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0STATUS) & IRQ0STATUS_CCDC_LSC_PREF_COMP_IRQ) { isp_reg_writel(isp, IRQ0STATUS_CCDC_LSC_PREF_COMP_IRQ, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0STATUS); return 0; } rmb(); udelay(1); } return -ETIMEDOUT; } /* * __ccdc_lsc_enable - Enables/Disables the Lens Shading Compensation module. * @ccdc: Pointer to ISP CCDC device. * @enable: 0 Disables LSC, 1 Enables LSC. */ static int __ccdc_lsc_enable(struct isp_ccdc_device *ccdc, int enable) { struct isp_device *isp = to_isp_device(ccdc); const struct v4l2_mbus_framefmt *format = __ccdc_get_format(ccdc, NULL, CCDC_PAD_SINK, V4L2_SUBDEV_FORMAT_ACTIVE); if ((format->code != V4L2_MBUS_FMT_SGRBG10_1X10) && (format->code != V4L2_MBUS_FMT_SRGGB10_1X10) && (format->code != V4L2_MBUS_FMT_SBGGR10_1X10) && (format->code != V4L2_MBUS_FMT_SGBRG10_1X10)) return -EINVAL; if (enable) omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_CCDC_LSC_READ); isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_LSC_CONFIG, ISPCCDC_LSC_ENABLE, enable ? ISPCCDC_LSC_ENABLE : 0); if (enable) { if (ccdc_lsc_wait_prefetch(ccdc) < 0) { isp_reg_clr(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_LSC_CONFIG, ISPCCDC_LSC_ENABLE); ccdc->lsc.state = LSC_STATE_STOPPED; dev_warn(to_device(ccdc), "LSC prefecth timeout\n"); return -ETIMEDOUT; } ccdc->lsc.state = LSC_STATE_RUNNING; } else { ccdc->lsc.state = LSC_STATE_STOPPING; } return 0; } static int ccdc_lsc_busy(struct isp_ccdc_device *ccdc) { struct isp_device *isp = to_isp_device(ccdc); return isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_LSC_CONFIG) & ISPCCDC_LSC_BUSY; } /* __ccdc_lsc_configure - Apply a new configuration to the LSC engine * @ccdc: Pointer to ISP CCDC device * @req: New configuration request * * context: in_interrupt() */ static int __ccdc_lsc_configure(struct isp_ccdc_device *ccdc, struct ispccdc_lsc_config_req *req) { if (!req->enable) return -EINVAL; if (ccdc_lsc_validate_config(ccdc, &req->config) < 0) { dev_dbg(to_device(ccdc), "Discard LSC configuration\n"); return -EINVAL; } if (ccdc_lsc_busy(ccdc)) return -EBUSY; ccdc_lsc_setup_regs(ccdc, &req->config); ccdc_lsc_program_table(ccdc, req->table); return 0; } /* * ccdc_lsc_error_handler - Handle LSC prefetch error scenario. * @ccdc: Pointer to ISP CCDC device. * * Disables LSC, and defers enablement to shadow registers update time. */ static void ccdc_lsc_error_handler(struct isp_ccdc_device *ccdc) { struct isp_device *isp = to_isp_device(ccdc); /* * From OMAP3 TRM: When this event is pending, the module * goes into transparent mode (output =input). Normal * operation can be resumed at the start of the next frame * after: * 1) Clearing this event * 2) Disabling the LSC module * 3) Enabling it */ isp_reg_clr(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_LSC_CONFIG, ISPCCDC_LSC_ENABLE); ccdc->lsc.state = LSC_STATE_STOPPED; } static void ccdc_lsc_free_request(struct isp_ccdc_device *ccdc, struct ispccdc_lsc_config_req *req) { struct isp_device *isp = to_isp_device(ccdc); if (req == NULL) return; if (req->iovm) dma_unmap_sg(isp->dev, req->iovm->sgt->sgl, req->iovm->sgt->nents, DMA_TO_DEVICE); if (req->table) omap_iommu_vfree(isp->domain, isp->dev, req->table); kfree(req); } static void ccdc_lsc_free_queue(struct isp_ccdc_device *ccdc, struct list_head *queue) { struct ispccdc_lsc_config_req *req, *n; unsigned long flags; spin_lock_irqsave(&ccdc->lsc.req_lock, flags); list_for_each_entry_safe(req, n, queue, list) { list_del(&req->list); spin_unlock_irqrestore(&ccdc->lsc.req_lock, flags); ccdc_lsc_free_request(ccdc, req); spin_lock_irqsave(&ccdc->lsc.req_lock, flags); } spin_unlock_irqrestore(&ccdc->lsc.req_lock, flags); } static void ccdc_lsc_free_table_work(struct work_struct *work) { struct isp_ccdc_device *ccdc; struct ispccdc_lsc *lsc; lsc = container_of(work, struct ispccdc_lsc, table_work); ccdc = container_of(lsc, struct isp_ccdc_device, lsc); ccdc_lsc_free_queue(ccdc, &lsc->free_queue); } /* * ccdc_lsc_config - Configure the LSC module from a userspace request * * Store the request LSC configuration in the LSC engine request pointer. The * configuration will be applied to the hardware when the CCDC will be enabled, * or at the next LSC interrupt if the CCDC is already running. */ static int ccdc_lsc_config(struct isp_ccdc_device *ccdc, struct omap3isp_ccdc_update_config *config) { struct isp_device *isp = to_isp_device(ccdc); struct ispccdc_lsc_config_req *req; unsigned long flags; void *table; u16 update; int ret; update = config->update & (OMAP3ISP_CCDC_CONFIG_LSC | OMAP3ISP_CCDC_TBL_LSC); if (!update) return 0; if (update != (OMAP3ISP_CCDC_CONFIG_LSC | OMAP3ISP_CCDC_TBL_LSC)) { dev_dbg(to_device(ccdc), "%s: Both LSC configuration and table " "need to be supplied\n", __func__); return -EINVAL; } req = kzalloc(sizeof(*req), GFP_KERNEL); if (req == NULL) return -ENOMEM; if (config->flag & OMAP3ISP_CCDC_CONFIG_LSC) { if (copy_from_user(&req->config, config->lsc_cfg, sizeof(req->config))) { ret = -EFAULT; goto done; } req->enable = 1; req->table = omap_iommu_vmalloc(isp->domain, isp->dev, 0, req->config.size, IOMMU_FLAG); if (IS_ERR_VALUE(req->table)) { req->table = 0; ret = -ENOMEM; goto done; } req->iovm = omap_find_iovm_area(isp->dev, req->table); if (req->iovm == NULL) { ret = -ENOMEM; goto done; } if (!dma_map_sg(isp->dev, req->iovm->sgt->sgl, req->iovm->sgt->nents, DMA_TO_DEVICE)) { ret = -ENOMEM; req->iovm = NULL; goto done; } dma_sync_sg_for_cpu(isp->dev, req->iovm->sgt->sgl, req->iovm->sgt->nents, DMA_TO_DEVICE); table = omap_da_to_va(isp->dev, req->table); if (copy_from_user(table, config->lsc, req->config.size)) { ret = -EFAULT; goto done; } dma_sync_sg_for_device(isp->dev, req->iovm->sgt->sgl, req->iovm->sgt->nents, DMA_TO_DEVICE); } spin_lock_irqsave(&ccdc->lsc.req_lock, flags); if (ccdc->lsc.request) { list_add_tail(&ccdc->lsc.request->list, &ccdc->lsc.free_queue); schedule_work(&ccdc->lsc.table_work); } ccdc->lsc.request = req; spin_unlock_irqrestore(&ccdc->lsc.req_lock, flags); ret = 0; done: if (ret < 0) ccdc_lsc_free_request(ccdc, req); return ret; } static inline int ccdc_lsc_is_configured(struct isp_ccdc_device *ccdc) { unsigned long flags; spin_lock_irqsave(&ccdc->lsc.req_lock, flags); if (ccdc->lsc.active) { spin_unlock_irqrestore(&ccdc->lsc.req_lock, flags); return 1; } spin_unlock_irqrestore(&ccdc->lsc.req_lock, flags); return 0; } static int ccdc_lsc_enable(struct isp_ccdc_device *ccdc) { struct ispccdc_lsc *lsc = &ccdc->lsc; if (lsc->state != LSC_STATE_STOPPED) return -EINVAL; if (lsc->active) { list_add_tail(&lsc->active->list, &lsc->free_queue); lsc->active = NULL; } if (__ccdc_lsc_configure(ccdc, lsc->request) < 0) { omap3isp_sbl_disable(to_isp_device(ccdc), OMAP3_ISP_SBL_CCDC_LSC_READ); list_add_tail(&lsc->request->list, &lsc->free_queue); lsc->request = NULL; goto done; } lsc->active = lsc->request; lsc->request = NULL; __ccdc_lsc_enable(ccdc, 1); done: if (!list_empty(&lsc->free_queue)) schedule_work(&lsc->table_work); return 0; } /* ----------------------------------------------------------------------------- * Parameters configuration */ /* * ccdc_configure_clamp - Configure optical-black or digital clamping * @ccdc: Pointer to ISP CCDC device. * * The CCDC performs either optical-black or digital clamp. Configure and enable * the selected clamp method. */ static void ccdc_configure_clamp(struct isp_ccdc_device *ccdc) { struct isp_device *isp = to_isp_device(ccdc); u32 clamp; if (ccdc->obclamp) { clamp = ccdc->clamp.obgain << ISPCCDC_CLAMP_OBGAIN_SHIFT; clamp |= ccdc->clamp.oblen << ISPCCDC_CLAMP_OBSLEN_SHIFT; clamp |= ccdc->clamp.oblines << ISPCCDC_CLAMP_OBSLN_SHIFT; clamp |= ccdc->clamp.obstpixel << ISPCCDC_CLAMP_OBST_SHIFT; isp_reg_writel(isp, clamp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_CLAMP); } else { isp_reg_writel(isp, ccdc->clamp.dcsubval, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_DCSUB); } isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_CLAMP, ISPCCDC_CLAMP_CLAMPEN, ccdc->obclamp ? ISPCCDC_CLAMP_CLAMPEN : 0); } /* * ccdc_configure_fpc - Configure Faulty Pixel Correction * @ccdc: Pointer to ISP CCDC device. */ static void ccdc_configure_fpc(struct isp_ccdc_device *ccdc) { struct isp_device *isp = to_isp_device(ccdc); isp_reg_clr(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_FPC, ISPCCDC_FPC_FPCEN); if (!ccdc->fpc_en) return; isp_reg_writel(isp, ccdc->fpc.fpcaddr, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_FPC_ADDR); /* The FPNUM field must be set before enabling FPC. */ isp_reg_writel(isp, (ccdc->fpc.fpnum << ISPCCDC_FPC_FPNUM_SHIFT), OMAP3_ISP_IOMEM_CCDC, ISPCCDC_FPC); isp_reg_writel(isp, (ccdc->fpc.fpnum << ISPCCDC_FPC_FPNUM_SHIFT) | ISPCCDC_FPC_FPCEN, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_FPC); } /* * ccdc_configure_black_comp - Configure Black Level Compensation. * @ccdc: Pointer to ISP CCDC device. */ static void ccdc_configure_black_comp(struct isp_ccdc_device *ccdc) { struct isp_device *isp = to_isp_device(ccdc); u32 blcomp; blcomp = ccdc->blcomp.b_mg << ISPCCDC_BLKCMP_B_MG_SHIFT; blcomp |= ccdc->blcomp.gb_g << ISPCCDC_BLKCMP_GB_G_SHIFT; blcomp |= ccdc->blcomp.gr_cy << ISPCCDC_BLKCMP_GR_CY_SHIFT; blcomp |= ccdc->blcomp.r_ye << ISPCCDC_BLKCMP_R_YE_SHIFT; isp_reg_writel(isp, blcomp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_BLKCMP); } /* * ccdc_configure_lpf - Configure Low-Pass Filter (LPF). * @ccdc: Pointer to ISP CCDC device. */ static void ccdc_configure_lpf(struct isp_ccdc_device *ccdc) { struct isp_device *isp = to_isp_device(ccdc); isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_SYN_MODE, ISPCCDC_SYN_MODE_LPF, ccdc->lpf ? ISPCCDC_SYN_MODE_LPF : 0); } /* * ccdc_configure_alaw - Configure A-law compression. * @ccdc: Pointer to ISP CCDC device. */ static void ccdc_configure_alaw(struct isp_ccdc_device *ccdc) { struct isp_device *isp = to_isp_device(ccdc); const struct isp_format_info *info; u32 alaw = 0; info = omap3isp_video_format_info(ccdc->formats[CCDC_PAD_SINK].code); switch (info->width) { case 8: return; case 10: alaw = ISPCCDC_ALAW_GWDI_9_0; break; case 11: alaw = ISPCCDC_ALAW_GWDI_10_1; break; case 12: alaw = ISPCCDC_ALAW_GWDI_11_2; break; case 13: alaw = ISPCCDC_ALAW_GWDI_12_3; break; } if (ccdc->alaw) alaw |= ISPCCDC_ALAW_CCDTBL; isp_reg_writel(isp, alaw, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_ALAW); } /* * ccdc_config_imgattr - Configure sensor image specific attributes. * @ccdc: Pointer to ISP CCDC device. * @colptn: Color pattern of the sensor. */ static void ccdc_config_imgattr(struct isp_ccdc_device *ccdc, u32 colptn) { struct isp_device *isp = to_isp_device(ccdc); isp_reg_writel(isp, colptn, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_COLPTN); } /* * ccdc_config - Set CCDC configuration from userspace * @ccdc: Pointer to ISP CCDC device. * @userspace_add: Structure containing CCDC configuration sent from userspace. * * Returns 0 if successful, -EINVAL if the pointer to the configuration * structure is null, or the copy_from_user function fails to copy user space * memory to kernel space memory. */ static int ccdc_config(struct isp_ccdc_device *ccdc, struct omap3isp_ccdc_update_config *ccdc_struct) { struct isp_device *isp = to_isp_device(ccdc); unsigned long flags; spin_lock_irqsave(&ccdc->lock, flags); ccdc->shadow_update = 1; spin_unlock_irqrestore(&ccdc->lock, flags); if (OMAP3ISP_CCDC_ALAW & ccdc_struct->update) { ccdc->alaw = !!(OMAP3ISP_CCDC_ALAW & ccdc_struct->flag); ccdc->update |= OMAP3ISP_CCDC_ALAW; } if (OMAP3ISP_CCDC_LPF & ccdc_struct->update) { ccdc->lpf = !!(OMAP3ISP_CCDC_LPF & ccdc_struct->flag); ccdc->update |= OMAP3ISP_CCDC_LPF; } if (OMAP3ISP_CCDC_BLCLAMP & ccdc_struct->update) { if (copy_from_user(&ccdc->clamp, ccdc_struct->bclamp, sizeof(ccdc->clamp))) { ccdc->shadow_update = 0; return -EFAULT; } ccdc->obclamp = !!(OMAP3ISP_CCDC_BLCLAMP & ccdc_struct->flag); ccdc->update |= OMAP3ISP_CCDC_BLCLAMP; } if (OMAP3ISP_CCDC_BCOMP & ccdc_struct->update) { if (copy_from_user(&ccdc->blcomp, ccdc_struct->blcomp, sizeof(ccdc->blcomp))) { ccdc->shadow_update = 0; return -EFAULT; } ccdc->update |= OMAP3ISP_CCDC_BCOMP; } ccdc->shadow_update = 0; if (OMAP3ISP_CCDC_FPC & ccdc_struct->update) { u32 table_old = 0; u32 table_new; u32 size; if (ccdc->state != ISP_PIPELINE_STREAM_STOPPED) return -EBUSY; ccdc->fpc_en = !!(OMAP3ISP_CCDC_FPC & ccdc_struct->flag); if (ccdc->fpc_en) { if (copy_from_user(&ccdc->fpc, ccdc_struct->fpc, sizeof(ccdc->fpc))) return -EFAULT; /* * table_new must be 64-bytes aligned, but it's * already done by omap_iommu_vmalloc(). */ size = ccdc->fpc.fpnum * 4; table_new = omap_iommu_vmalloc(isp->domain, isp->dev, 0, size, IOMMU_FLAG); if (IS_ERR_VALUE(table_new)) return -ENOMEM; if (copy_from_user(omap_da_to_va(isp->dev, table_new), (__force void __user *) ccdc->fpc.fpcaddr, size)) { omap_iommu_vfree(isp->domain, isp->dev, table_new); return -EFAULT; } table_old = ccdc->fpc.fpcaddr; ccdc->fpc.fpcaddr = table_new; } ccdc_configure_fpc(ccdc); if (table_old != 0) omap_iommu_vfree(isp->domain, isp->dev, table_old); } return ccdc_lsc_config(ccdc, ccdc_struct); } static void ccdc_apply_controls(struct isp_ccdc_device *ccdc) { if (ccdc->update & OMAP3ISP_CCDC_ALAW) { ccdc_configure_alaw(ccdc); ccdc->update &= ~OMAP3ISP_CCDC_ALAW; } if (ccdc->update & OMAP3ISP_CCDC_LPF) { ccdc_configure_lpf(ccdc); ccdc->update &= ~OMAP3ISP_CCDC_LPF; } if (ccdc->update & OMAP3ISP_CCDC_BLCLAMP) { ccdc_configure_clamp(ccdc); ccdc->update &= ~OMAP3ISP_CCDC_BLCLAMP; } if (ccdc->update & OMAP3ISP_CCDC_BCOMP) { ccdc_configure_black_comp(ccdc); ccdc->update &= ~OMAP3ISP_CCDC_BCOMP; } } /* * omap3isp_ccdc_restore_context - Restore values of the CCDC module registers * @dev: Pointer to ISP device */ void omap3isp_ccdc_restore_context(struct isp_device *isp) { struct isp_ccdc_device *ccdc = &isp->isp_ccdc; isp_reg_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_CFG, ISPCCDC_CFG_VDLC); ccdc->update = OMAP3ISP_CCDC_ALAW | OMAP3ISP_CCDC_LPF | OMAP3ISP_CCDC_BLCLAMP | OMAP3ISP_CCDC_BCOMP; ccdc_apply_controls(ccdc); ccdc_configure_fpc(ccdc); } /* ----------------------------------------------------------------------------- * Format- and pipeline-related configuration helpers */ /* * ccdc_config_vp - Configure the Video Port. * @ccdc: Pointer to ISP CCDC device. */ static void ccdc_config_vp(struct isp_ccdc_device *ccdc) { struct isp_pipeline *pipe = to_isp_pipeline(&ccdc->subdev.entity); struct isp_device *isp = to_isp_device(ccdc); const struct isp_format_info *info; unsigned long l3_ick = pipe->l3_ick; unsigned int max_div = isp->revision == ISP_REVISION_15_0 ? 64 : 8; unsigned int div = 0; u32 fmtcfg_vp; fmtcfg_vp = isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_FMTCFG) & ~(ISPCCDC_FMTCFG_VPIN_MASK | ISPCCDC_FMTCFG_VPIF_FRQ_MASK); info = omap3isp_video_format_info(ccdc->formats[CCDC_PAD_SINK].code); switch (info->width) { case 8: case 10: fmtcfg_vp |= ISPCCDC_FMTCFG_VPIN_9_0; break; case 11: fmtcfg_vp |= ISPCCDC_FMTCFG_VPIN_10_1; break; case 12: fmtcfg_vp |= ISPCCDC_FMTCFG_VPIN_11_2; break; case 13: fmtcfg_vp |= ISPCCDC_FMTCFG_VPIN_12_3; break; } if (pipe->input) div = DIV_ROUND_UP(l3_ick, pipe->max_rate); else if (pipe->external_rate) div = l3_ick / pipe->external_rate; div = clamp(div, 2U, max_div); fmtcfg_vp |= (div - 2) << ISPCCDC_FMTCFG_VPIF_FRQ_SHIFT; isp_reg_writel(isp, fmtcfg_vp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_FMTCFG); } /* * ccdc_enable_vp - Enable Video Port. * @ccdc: Pointer to ISP CCDC device. * @enable: 0 Disables VP, 1 Enables VP * * This is needed for outputting image to Preview, H3A and HIST ISP submodules. */ static void ccdc_enable_vp(struct isp_ccdc_device *ccdc, u8 enable) { struct isp_device *isp = to_isp_device(ccdc); isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_FMTCFG, ISPCCDC_FMTCFG_VPEN, enable ? ISPCCDC_FMTCFG_VPEN : 0); } /* * ccdc_config_outlineoffset - Configure memory saving output line offset * @ccdc: Pointer to ISP CCDC device. * @offset: Address offset to start a new line. Must be twice the * Output width and aligned on 32 byte boundary * @oddeven: Specifies the odd/even line pattern to be chosen to store the * output. * @numlines: Set the value 0-3 for +1-4lines, 4-7 for -1-4lines. * * - Configures the output line offset when stored in memory * - Sets the odd/even line pattern to store the output * (EVENEVEN (1), ODDEVEN (2), EVENODD (3), ODDODD (4)) * - Configures the number of even and odd line fields in case of rearranging * the lines. */ static void ccdc_config_outlineoffset(struct isp_ccdc_device *ccdc, u32 offset, u8 oddeven, u8 numlines) { struct isp_device *isp = to_isp_device(ccdc); isp_reg_writel(isp, offset & 0xffff, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_HSIZE_OFF); isp_reg_clr(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_SDOFST, ISPCCDC_SDOFST_FINV); isp_reg_clr(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_SDOFST, ISPCCDC_SDOFST_FOFST_4L); switch (oddeven) { case EVENEVEN: isp_reg_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_SDOFST, (numlines & 0x7) << ISPCCDC_SDOFST_LOFST0_SHIFT); break; case ODDEVEN: isp_reg_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_SDOFST, (numlines & 0x7) << ISPCCDC_SDOFST_LOFST1_SHIFT); break; case EVENODD: isp_reg_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_SDOFST, (numlines & 0x7) << ISPCCDC_SDOFST_LOFST2_SHIFT); break; case ODDODD: isp_reg_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_SDOFST, (numlines & 0x7) << ISPCCDC_SDOFST_LOFST3_SHIFT); break; default: break; } } /* * ccdc_set_outaddr - Set memory address to save output image * @ccdc: Pointer to ISP CCDC device. * @addr: ISP MMU Mapped 32-bit memory address aligned on 32 byte boundary. * * Sets the memory address where the output will be saved. */ static void ccdc_set_outaddr(struct isp_ccdc_device *ccdc, u32 addr) { struct isp_device *isp = to_isp_device(ccdc); isp_reg_writel(isp, addr, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_SDR_ADDR); } /* * omap3isp_ccdc_max_rate - Calculate maximum input data rate based on the input * @ccdc: Pointer to ISP CCDC device. * @max_rate: Maximum calculated data rate. * * Returns in *max_rate less value between calculated and passed */ void omap3isp_ccdc_max_rate(struct isp_ccdc_device *ccdc, unsigned int *max_rate) { struct isp_pipeline *pipe = to_isp_pipeline(&ccdc->subdev.entity); unsigned int rate; if (pipe == NULL) return; /* * TRM says that for parallel sensors the maximum data rate * should be 90% form L3/2 clock, otherwise just L3/2. */ if (ccdc->input == CCDC_INPUT_PARALLEL) rate = pipe->l3_ick / 2 * 9 / 10; else rate = pipe->l3_ick / 2; *max_rate = min(*max_rate, rate); } /* * ccdc_config_sync_if - Set CCDC sync interface configuration * @ccdc: Pointer to ISP CCDC device. * @pdata: Parallel interface platform data (may be NULL) * @data_size: Data size */ static void ccdc_config_sync_if(struct isp_ccdc_device *ccdc, struct isp_parallel_platform_data *pdata, unsigned int data_size) { struct isp_device *isp = to_isp_device(ccdc); u32 syn_mode = ISPCCDC_SYN_MODE_VDHDEN; switch (data_size) { case 8: syn_mode |= ISPCCDC_SYN_MODE_DATSIZ_8; break; case 10: syn_mode |= ISPCCDC_SYN_MODE_DATSIZ_10; break; case 11: syn_mode |= ISPCCDC_SYN_MODE_DATSIZ_11; break; case 12: syn_mode |= ISPCCDC_SYN_MODE_DATSIZ_12; break; } if (pdata && pdata->data_pol) syn_mode |= ISPCCDC_SYN_MODE_DATAPOL; if (pdata && pdata->hs_pol) syn_mode |= ISPCCDC_SYN_MODE_HDPOL; if (pdata && pdata->vs_pol) syn_mode |= ISPCCDC_SYN_MODE_VDPOL; isp_reg_writel(isp, syn_mode, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_SYN_MODE); } /* CCDC formats descriptions */ static const u32 ccdc_sgrbg_pattern = ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP0PLC0_SHIFT | ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP0PLC1_SHIFT | ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP0PLC2_SHIFT | ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP0PLC3_SHIFT | ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP1PLC0_SHIFT | ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP1PLC1_SHIFT | ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP1PLC2_SHIFT | ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP1PLC3_SHIFT | ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP2PLC0_SHIFT | ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP2PLC1_SHIFT | ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP2PLC2_SHIFT | ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP2PLC3_SHIFT | ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP3PLC0_SHIFT | ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP3PLC1_SHIFT | ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP3PLC2_SHIFT | ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP3PLC3_SHIFT; static const u32 ccdc_srggb_pattern = ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP0PLC0_SHIFT | ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP0PLC1_SHIFT | ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP0PLC2_SHIFT | ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP0PLC3_SHIFT | ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP1PLC0_SHIFT | ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP1PLC1_SHIFT | ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP1PLC2_SHIFT | ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP1PLC3_SHIFT | ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP2PLC0_SHIFT | ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP2PLC1_SHIFT | ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP2PLC2_SHIFT | ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP2PLC3_SHIFT | ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP3PLC0_SHIFT | ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP3PLC1_SHIFT | ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP3PLC2_SHIFT | ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP3PLC3_SHIFT; static const u32 ccdc_sbggr_pattern = ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP0PLC0_SHIFT | ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP0PLC1_SHIFT | ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP0PLC2_SHIFT | ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP0PLC3_SHIFT | ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP1PLC0_SHIFT | ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP1PLC1_SHIFT | ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP1PLC2_SHIFT | ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP1PLC3_SHIFT | ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP2PLC0_SHIFT | ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP2PLC1_SHIFT | ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP2PLC2_SHIFT | ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP2PLC3_SHIFT | ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP3PLC0_SHIFT | ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP3PLC1_SHIFT | ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP3PLC2_SHIFT | ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP3PLC3_SHIFT; static const u32 ccdc_sgbrg_pattern = ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP0PLC0_SHIFT | ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP0PLC1_SHIFT | ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP0PLC2_SHIFT | ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP0PLC3_SHIFT | ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP1PLC0_SHIFT | ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP1PLC1_SHIFT | ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP1PLC2_SHIFT | ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP1PLC3_SHIFT | ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP2PLC0_SHIFT | ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP2PLC1_SHIFT | ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP2PLC2_SHIFT | ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP2PLC3_SHIFT | ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP3PLC0_SHIFT | ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP3PLC1_SHIFT | ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP3PLC2_SHIFT | ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP3PLC3_SHIFT; static void ccdc_configure(struct isp_ccdc_device *ccdc) { struct isp_device *isp = to_isp_device(ccdc); struct isp_parallel_platform_data *pdata = NULL; struct v4l2_subdev *sensor; struct v4l2_mbus_framefmt *format; const struct v4l2_rect *crop; const struct isp_format_info *fmt_info; struct v4l2_subdev_format fmt_src; unsigned int depth_out; unsigned int depth_in = 0; struct media_pad *pad; unsigned long flags; unsigned int shift; u32 syn_mode; u32 ccdc_pattern; pad = media_entity_remote_source(&ccdc->pads[CCDC_PAD_SINK]); sensor = media_entity_to_v4l2_subdev(pad->entity); if (ccdc->input == CCDC_INPUT_PARALLEL) pdata = &((struct isp_v4l2_subdevs_group *)sensor->host_priv) ->bus.parallel; /* Compute shift value for lane shifter to configure the bridge. */ fmt_src.pad = pad->index; fmt_src.which = V4L2_SUBDEV_FORMAT_ACTIVE; if (!v4l2_subdev_call(sensor, pad, get_fmt, NULL, &fmt_src)) { fmt_info = omap3isp_video_format_info(fmt_src.format.code); depth_in = fmt_info->width; } fmt_info = omap3isp_video_format_info (isp->isp_ccdc.formats[CCDC_PAD_SINK].code); depth_out = fmt_info->width; shift = depth_in - depth_out; omap3isp_configure_bridge(isp, ccdc->input, pdata, shift); ccdc_config_sync_if(ccdc, pdata, depth_out); /* CCDC_PAD_SINK */ format = &ccdc->formats[CCDC_PAD_SINK]; syn_mode = isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_SYN_MODE); /* Use the raw, unprocessed data when writing to memory. The H3A and * histogram modules are still fed with lens shading corrected data. */ syn_mode &= ~ISPCCDC_SYN_MODE_VP2SDR; if (ccdc->output & CCDC_OUTPUT_MEMORY) syn_mode |= ISPCCDC_SYN_MODE_WEN; else syn_mode &= ~ISPCCDC_SYN_MODE_WEN; if (ccdc->output & CCDC_OUTPUT_RESIZER) syn_mode |= ISPCCDC_SYN_MODE_SDR2RSZ; else syn_mode &= ~ISPCCDC_SYN_MODE_SDR2RSZ; /* Use PACK8 mode for 1byte per pixel formats. */ if (omap3isp_video_format_info(format->code)->width <= 8) syn_mode |= ISPCCDC_SYN_MODE_PACK8; else syn_mode &= ~ISPCCDC_SYN_MODE_PACK8; isp_reg_writel(isp, syn_mode, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_SYN_MODE); /* Mosaic filter */ switch (format->code) { case V4L2_MBUS_FMT_SRGGB10_1X10: case V4L2_MBUS_FMT_SRGGB12_1X12: ccdc_pattern = ccdc_srggb_pattern; break; case V4L2_MBUS_FMT_SBGGR10_1X10: case V4L2_MBUS_FMT_SBGGR12_1X12: ccdc_pattern = ccdc_sbggr_pattern; break; case V4L2_MBUS_FMT_SGBRG10_1X10: case V4L2_MBUS_FMT_SGBRG12_1X12: ccdc_pattern = ccdc_sgbrg_pattern; break; default: /* Use GRBG */ ccdc_pattern = ccdc_sgrbg_pattern; break; } ccdc_config_imgattr(ccdc, ccdc_pattern); /* Generate VD0 on the last line of the image and VD1 on the * 2/3 height line. */ isp_reg_writel(isp, ((format->height - 2) << ISPCCDC_VDINT_0_SHIFT) | ((format->height * 2 / 3) << ISPCCDC_VDINT_1_SHIFT), OMAP3_ISP_IOMEM_CCDC, ISPCCDC_VDINT); /* CCDC_PAD_SOURCE_OF */ crop = &ccdc->crop; isp_reg_writel(isp, (crop->left << ISPCCDC_HORZ_INFO_SPH_SHIFT) | ((crop->width - 1) << ISPCCDC_HORZ_INFO_NPH_SHIFT), OMAP3_ISP_IOMEM_CCDC, ISPCCDC_HORZ_INFO); isp_reg_writel(isp, crop->top << ISPCCDC_VERT_START_SLV0_SHIFT, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_VERT_START); isp_reg_writel(isp, (crop->height - 1) << ISPCCDC_VERT_LINES_NLV_SHIFT, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_VERT_LINES); ccdc_config_outlineoffset(ccdc, ccdc->video_out.bpl_value, 0, 0); /* CCDC_PAD_SOURCE_VP */ format = &ccdc->formats[CCDC_PAD_SOURCE_VP]; isp_reg_writel(isp, (0 << ISPCCDC_FMT_HORZ_FMTSPH_SHIFT) | (format->width << ISPCCDC_FMT_HORZ_FMTLNH_SHIFT), OMAP3_ISP_IOMEM_CCDC, ISPCCDC_FMT_HORZ); isp_reg_writel(isp, (0 << ISPCCDC_FMT_VERT_FMTSLV_SHIFT) | ((format->height + 1) << ISPCCDC_FMT_VERT_FMTLNV_SHIFT), OMAP3_ISP_IOMEM_CCDC, ISPCCDC_FMT_VERT); isp_reg_writel(isp, (format->width << ISPCCDC_VP_OUT_HORZ_NUM_SHIFT) | (format->height << ISPCCDC_VP_OUT_VERT_NUM_SHIFT), OMAP3_ISP_IOMEM_CCDC, ISPCCDC_VP_OUT); spin_lock_irqsave(&ccdc->lsc.req_lock, flags); if (ccdc->lsc.request == NULL) goto unlock; WARN_ON(ccdc->lsc.active); /* Get last good LSC configuration. If it is not supported for * the current active resolution discard it. */ if (ccdc->lsc.active == NULL && __ccdc_lsc_configure(ccdc, ccdc->lsc.request) == 0) { ccdc->lsc.active = ccdc->lsc.request; } else { list_add_tail(&ccdc->lsc.request->list, &ccdc->lsc.free_queue); schedule_work(&ccdc->lsc.table_work); } ccdc->lsc.request = NULL; unlock: spin_unlock_irqrestore(&ccdc->lsc.req_lock, flags); ccdc_apply_controls(ccdc); } static void __ccdc_enable(struct isp_ccdc_device *ccdc, int enable) { struct isp_device *isp = to_isp_device(ccdc); isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_PCR, ISPCCDC_PCR_EN, enable ? ISPCCDC_PCR_EN : 0); } static int ccdc_disable(struct isp_ccdc_device *ccdc) { unsigned long flags; int ret = 0; spin_lock_irqsave(&ccdc->lock, flags); if (ccdc->state == ISP_PIPELINE_STREAM_CONTINUOUS) ccdc->stopping = CCDC_STOP_REQUEST; spin_unlock_irqrestore(&ccdc->lock, flags); ret = wait_event_timeout(ccdc->wait, ccdc->stopping == CCDC_STOP_FINISHED, msecs_to_jiffies(2000)); if (ret == 0) { ret = -ETIMEDOUT; dev_warn(to_device(ccdc), "CCDC stop timeout!\n"); } omap3isp_sbl_disable(to_isp_device(ccdc), OMAP3_ISP_SBL_CCDC_LSC_READ); mutex_lock(&ccdc->ioctl_lock); ccdc_lsc_free_request(ccdc, ccdc->lsc.request); ccdc->lsc.request = ccdc->lsc.active; ccdc->lsc.active = NULL; cancel_work_sync(&ccdc->lsc.table_work); ccdc_lsc_free_queue(ccdc, &ccdc->lsc.free_queue); mutex_unlock(&ccdc->ioctl_lock); ccdc->stopping = CCDC_STOP_NOT_REQUESTED; return ret > 0 ? 0 : ret; } static void ccdc_enable(struct isp_ccdc_device *ccdc) { if (ccdc_lsc_is_configured(ccdc)) __ccdc_lsc_enable(ccdc, 1); __ccdc_enable(ccdc, 1); } /* ----------------------------------------------------------------------------- * Interrupt handling */ /* * ccdc_sbl_busy - Poll idle state of CCDC and related SBL memory write bits * @ccdc: Pointer to ISP CCDC device. * * Returns zero if the CCDC is idle and the image has been written to * memory, too. */ static int ccdc_sbl_busy(struct isp_ccdc_device *ccdc) { struct isp_device *isp = to_isp_device(ccdc); return omap3isp_ccdc_busy(ccdc) | (isp_reg_readl(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_CCDC_WR_0) & ISPSBL_CCDC_WR_0_DATA_READY) | (isp_reg_readl(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_CCDC_WR_1) & ISPSBL_CCDC_WR_0_DATA_READY) | (isp_reg_readl(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_CCDC_WR_2) & ISPSBL_CCDC_WR_0_DATA_READY) | (isp_reg_readl(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_CCDC_WR_3) & ISPSBL_CCDC_WR_0_DATA_READY); } /* * ccdc_sbl_wait_idle - Wait until the CCDC and related SBL are idle * @ccdc: Pointer to ISP CCDC device. * @max_wait: Max retry count in us for wait for idle/busy transition. */ static int ccdc_sbl_wait_idle(struct isp_ccdc_device *ccdc, unsigned int max_wait) { unsigned int wait = 0; if (max_wait == 0) max_wait = 10000; /* 10 ms */ for (wait = 0; wait <= max_wait; wait++) { if (!ccdc_sbl_busy(ccdc)) return 0; rmb(); udelay(1); } return -EBUSY; } /* __ccdc_handle_stopping - Handle CCDC and/or LSC stopping sequence * @ccdc: Pointer to ISP CCDC device. * @event: Pointing which event trigger handler * * Return 1 when the event and stopping request combination is satisfied, * zero otherwise. */ static int __ccdc_handle_stopping(struct isp_ccdc_device *ccdc, u32 event) { int rval = 0; switch ((ccdc->stopping & 3) | event) { case CCDC_STOP_REQUEST | CCDC_EVENT_VD1: if (ccdc->lsc.state != LSC_STATE_STOPPED) __ccdc_lsc_enable(ccdc, 0); __ccdc_enable(ccdc, 0); ccdc->stopping = CCDC_STOP_EXECUTED; return 1; case CCDC_STOP_EXECUTED | CCDC_EVENT_VD0: ccdc->stopping |= CCDC_STOP_CCDC_FINISHED; if (ccdc->lsc.state == LSC_STATE_STOPPED) ccdc->stopping |= CCDC_STOP_LSC_FINISHED; rval = 1; break; case CCDC_STOP_EXECUTED | CCDC_EVENT_LSC_DONE: ccdc->stopping |= CCDC_STOP_LSC_FINISHED; rval = 1; break; case CCDC_STOP_EXECUTED | CCDC_EVENT_VD1: return 1; } if (ccdc->stopping == CCDC_STOP_FINISHED) { wake_up(&ccdc->wait); rval = 1; } return rval; } static void ccdc_hs_vs_isr(struct isp_ccdc_device *ccdc) { struct isp_pipeline *pipe = to_isp_pipeline(&ccdc->subdev.entity); struct video_device *vdev = ccdc->subdev.devnode; struct v4l2_event event; /* Frame number propagation */ atomic_inc(&pipe->frame_number); memset(&event, 0, sizeof(event)); event.type = V4L2_EVENT_FRAME_SYNC; event.u.frame_sync.frame_sequence = atomic_read(&pipe->frame_number); v4l2_event_queue(vdev, &event); } /* * ccdc_lsc_isr - Handle LSC events * @ccdc: Pointer to ISP CCDC device. * @events: LSC events */ static void ccdc_lsc_isr(struct isp_ccdc_device *ccdc, u32 events) { unsigned long flags; if (events & IRQ0STATUS_CCDC_LSC_PREF_ERR_IRQ) { struct isp_pipeline *pipe = to_isp_pipeline(&ccdc->subdev.entity); ccdc_lsc_error_handler(ccdc); pipe->error = true; dev_dbg(to_device(ccdc), "lsc prefetch error\n"); } if (!(events & IRQ0STATUS_CCDC_LSC_DONE_IRQ)) return; /* LSC_DONE interrupt occur, there are two cases * 1. stopping for reconfiguration * 2. stopping because of STREAM OFF command */ spin_lock_irqsave(&ccdc->lsc.req_lock, flags); if (ccdc->lsc.state == LSC_STATE_STOPPING) ccdc->lsc.state = LSC_STATE_STOPPED; if (__ccdc_handle_stopping(ccdc, CCDC_EVENT_LSC_DONE)) goto done; if (ccdc->lsc.state != LSC_STATE_RECONFIG) goto done; /* LSC is in STOPPING state, change to the new state */ ccdc->lsc.state = LSC_STATE_STOPPED; /* This is an exception. Start of frame and LSC_DONE interrupt * have been received on the same time. Skip this event and wait * for better times. */ if (events & IRQ0STATUS_HS_VS_IRQ) goto done; /* The LSC engine is stopped at this point. Enable it if there's a * pending request. */ if (ccdc->lsc.request == NULL) goto done; ccdc_lsc_enable(ccdc); done: spin_unlock_irqrestore(&ccdc->lsc.req_lock, flags); } static int ccdc_isr_buffer(struct isp_ccdc_device *ccdc) { struct isp_pipeline *pipe = to_isp_pipeline(&ccdc->subdev.entity); struct isp_device *isp = to_isp_device(ccdc); struct isp_buffer *buffer; int restart = 0; /* The CCDC generates VD0 interrupts even when disabled (the datasheet * doesn't explicitly state if that's supposed to happen or not, so it * can be considered as a hardware bug or as a feature, but we have to * deal with it anyway). Disabling the CCDC when no buffer is available * would thus not be enough, we need to handle the situation explicitly. */ if (list_empty(&ccdc->video_out.dmaqueue)) goto done; /* We're in continuous mode, and memory writes were disabled due to a * buffer underrun. Reenable them now that we have a buffer. The buffer * address has been set in ccdc_video_queue. */ if (ccdc->state == ISP_PIPELINE_STREAM_CONTINUOUS && ccdc->underrun) { restart = 1; ccdc->underrun = 0; goto done; } if (ccdc_sbl_wait_idle(ccdc, 1000)) { dev_info(isp->dev, "CCDC won't become idle!\n"); goto done; } buffer = omap3isp_video_buffer_next(&ccdc->video_out); if (buffer != NULL) { ccdc_set_outaddr(ccdc, buffer->isp_addr); restart = 1; } pipe->state |= ISP_PIPELINE_IDLE_OUTPUT; if (ccdc->state == ISP_PIPELINE_STREAM_SINGLESHOT && isp_pipeline_ready(pipe)) omap3isp_pipeline_set_stream(pipe, ISP_PIPELINE_STREAM_SINGLESHOT); done: return restart; } /* * ccdc_vd0_isr - Handle VD0 event * @ccdc: Pointer to ISP CCDC device. * * Executes LSC deferred enablement before next frame starts. */ static void ccdc_vd0_isr(struct isp_ccdc_device *ccdc) { unsigned long flags; int restart = 0; if (ccdc->output & CCDC_OUTPUT_MEMORY) restart = ccdc_isr_buffer(ccdc); spin_lock_irqsave(&ccdc->lock, flags); if (__ccdc_handle_stopping(ccdc, CCDC_EVENT_VD0)) { spin_unlock_irqrestore(&ccdc->lock, flags); return; } if (!ccdc->shadow_update) ccdc_apply_controls(ccdc); spin_unlock_irqrestore(&ccdc->lock, flags); if (restart) ccdc_enable(ccdc); } /* * ccdc_vd1_isr - Handle VD1 event * @ccdc: Pointer to ISP CCDC device. */ static void ccdc_vd1_isr(struct isp_ccdc_device *ccdc) { unsigned long flags; spin_lock_irqsave(&ccdc->lsc.req_lock, flags); /* * Depending on the CCDC pipeline state, CCDC stopping should be * handled differently. In SINGLESHOT we emulate an internal CCDC * stopping because the CCDC hw works only in continuous mode. * When CONTINUOUS pipeline state is used and the CCDC writes it's * data to memory the CCDC and LSC are stopped immediately but * without change the CCDC stopping state machine. The CCDC * stopping state machine should be used only when user request * for stopping is received (SINGLESHOT is an exeption). */ switch (ccdc->state) { case ISP_PIPELINE_STREAM_SINGLESHOT: ccdc->stopping = CCDC_STOP_REQUEST; break; case ISP_PIPELINE_STREAM_CONTINUOUS: if (ccdc->output & CCDC_OUTPUT_MEMORY) { if (ccdc->lsc.state != LSC_STATE_STOPPED) __ccdc_lsc_enable(ccdc, 0); __ccdc_enable(ccdc, 0); } break; case ISP_PIPELINE_STREAM_STOPPED: break; } if (__ccdc_handle_stopping(ccdc, CCDC_EVENT_VD1)) goto done; if (ccdc->lsc.request == NULL) goto done; /* * LSC need to be reconfigured. Stop it here and on next LSC_DONE IRQ * do the appropriate changes in registers */ if (ccdc->lsc.state == LSC_STATE_RUNNING) { __ccdc_lsc_enable(ccdc, 0); ccdc->lsc.state = LSC_STATE_RECONFIG; goto done; } /* LSC has been in STOPPED state, enable it */ if (ccdc->lsc.state == LSC_STATE_STOPPED) ccdc_lsc_enable(ccdc); done: spin_unlock_irqrestore(&ccdc->lsc.req_lock, flags); } /* * omap3isp_ccdc_isr - Configure CCDC during interframe time. * @ccdc: Pointer to ISP CCDC device. * @events: CCDC events */ int omap3isp_ccdc_isr(struct isp_ccdc_device *ccdc, u32 events) { if (ccdc->state == ISP_PIPELINE_STREAM_STOPPED) return 0; if (events & IRQ0STATUS_CCDC_VD1_IRQ) ccdc_vd1_isr(ccdc); ccdc_lsc_isr(ccdc, events); if (events & IRQ0STATUS_CCDC_VD0_IRQ) ccdc_vd0_isr(ccdc); if (events & IRQ0STATUS_HS_VS_IRQ) ccdc_hs_vs_isr(ccdc); return 0; } /* ----------------------------------------------------------------------------- * ISP video operations */ static int ccdc_video_queue(struct isp_video *video, struct isp_buffer *buffer) { struct isp_ccdc_device *ccdc = &video->isp->isp_ccdc; if (!(ccdc->output & CCDC_OUTPUT_MEMORY)) return -ENODEV; ccdc_set_outaddr(ccdc, buffer->isp_addr); /* We now have a buffer queued on the output, restart the pipeline * on the next CCDC interrupt if running in continuous mode (or when * starting the stream). */ ccdc->underrun = 1; return 0; } static const struct isp_video_operations ccdc_video_ops = { .queue = ccdc_video_queue, }; /* ----------------------------------------------------------------------------- * V4L2 subdev operations */ /* * ccdc_ioctl - CCDC module private ioctl's * @sd: ISP CCDC V4L2 subdevice * @cmd: ioctl command * @arg: ioctl argument * * Return 0 on success or a negative error code otherwise. */ static long ccdc_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg) { struct isp_ccdc_device *ccdc = v4l2_get_subdevdata(sd); int ret; switch (cmd) { case VIDIOC_OMAP3ISP_CCDC_CFG: mutex_lock(&ccdc->ioctl_lock); ret = ccdc_config(ccdc, arg); mutex_unlock(&ccdc->ioctl_lock); break; default: return -ENOIOCTLCMD; } return ret; } static int ccdc_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh, struct v4l2_event_subscription *sub) { if (sub->type != V4L2_EVENT_FRAME_SYNC) return -EINVAL; /* line number is zero at frame start */ if (sub->id != 0) return -EINVAL; return v4l2_event_subscribe(fh, sub, OMAP3ISP_CCDC_NEVENTS, NULL); } static int ccdc_unsubscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh, struct v4l2_event_subscription *sub) { return v4l2_event_unsubscribe(fh, sub); } /* * ccdc_set_stream - Enable/Disable streaming on the CCDC module * @sd: ISP CCDC V4L2 subdevice * @enable: Enable/disable stream * * When writing to memory, the CCDC hardware can't be enabled without a memory * buffer to write to. As the s_stream operation is called in response to a * STREAMON call without any buffer queued yet, just update the enabled field * and return immediately. The CCDC will be enabled in ccdc_isr_buffer(). * * When not writing to memory enable the CCDC immediately. */ static int ccdc_set_stream(struct v4l2_subdev *sd, int enable) { struct isp_ccdc_device *ccdc = v4l2_get_subdevdata(sd); struct isp_device *isp = to_isp_device(ccdc); int ret = 0; if (ccdc->state == ISP_PIPELINE_STREAM_STOPPED) { if (enable == ISP_PIPELINE_STREAM_STOPPED) return 0; omap3isp_subclk_enable(isp, OMAP3_ISP_SUBCLK_CCDC); isp_reg_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_CFG, ISPCCDC_CFG_VDLC); ccdc_configure(ccdc); /* TODO: Don't configure the video port if all of its output * links are inactive. */ ccdc_config_vp(ccdc); ccdc_enable_vp(ccdc, 1); ccdc_print_status(ccdc); } switch (enable) { case ISP_PIPELINE_STREAM_CONTINUOUS: if (ccdc->output & CCDC_OUTPUT_MEMORY) omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_CCDC_WRITE); if (ccdc->underrun || !(ccdc->output & CCDC_OUTPUT_MEMORY)) ccdc_enable(ccdc); ccdc->underrun = 0; break; case ISP_PIPELINE_STREAM_SINGLESHOT: if (ccdc->output & CCDC_OUTPUT_MEMORY && ccdc->state != ISP_PIPELINE_STREAM_SINGLESHOT) omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_CCDC_WRITE); ccdc_enable(ccdc); break; case ISP_PIPELINE_STREAM_STOPPED: ret = ccdc_disable(ccdc); if (ccdc->output & CCDC_OUTPUT_MEMORY) omap3isp_sbl_disable(isp, OMAP3_ISP_SBL_CCDC_WRITE); omap3isp_subclk_disable(isp, OMAP3_ISP_SUBCLK_CCDC); ccdc->underrun = 0; break; } ccdc->state = enable; return ret; } static struct v4l2_mbus_framefmt * __ccdc_get_format(struct isp_ccdc_device *ccdc, struct v4l2_subdev_fh *fh, unsigned int pad, enum v4l2_subdev_format_whence which) { if (which == V4L2_SUBDEV_FORMAT_TRY) return v4l2_subdev_get_try_format(fh, pad); else return &ccdc->formats[pad]; } static struct v4l2_rect * __ccdc_get_crop(struct isp_ccdc_device *ccdc, struct v4l2_subdev_fh *fh, enum v4l2_subdev_format_whence which) { if (which == V4L2_SUBDEV_FORMAT_TRY) return v4l2_subdev_get_try_crop(fh, CCDC_PAD_SOURCE_OF); else return &ccdc->crop; } /* * ccdc_try_format - Try video format on a pad * @ccdc: ISP CCDC device * @fh : V4L2 subdev file handle * @pad: Pad number * @fmt: Format */ static void ccdc_try_format(struct isp_ccdc_device *ccdc, struct v4l2_subdev_fh *fh, unsigned int pad, struct v4l2_mbus_framefmt *fmt, enum v4l2_subdev_format_whence which) { struct v4l2_mbus_framefmt *format; const struct isp_format_info *info; unsigned int width = fmt->width; unsigned int height = fmt->height; struct v4l2_rect *crop; unsigned int i; switch (pad) { case CCDC_PAD_SINK: /* TODO: If the CCDC output formatter pad is connected directly * to the resizer, only YUV formats can be used. */ for (i = 0; i < ARRAY_SIZE(ccdc_fmts); i++) { if (fmt->code == ccdc_fmts[i]) break; } /* If not found, use SGRBG10 as default */ if (i >= ARRAY_SIZE(ccdc_fmts)) fmt->code = V4L2_MBUS_FMT_SGRBG10_1X10; /* Clamp the input size. */ fmt->width = clamp_t(u32, width, 32, 4096); fmt->height = clamp_t(u32, height, 32, 4096); break; case CCDC_PAD_SOURCE_OF: format = __ccdc_get_format(ccdc, fh, CCDC_PAD_SINK, which); memcpy(fmt, format, sizeof(*fmt)); /* Hardcode the output size to the crop rectangle size. */ crop = __ccdc_get_crop(ccdc, fh, which); fmt->width = crop->width; fmt->height = crop->height; break; case CCDC_PAD_SOURCE_VP: format = __ccdc_get_format(ccdc, fh, CCDC_PAD_SINK, which); memcpy(fmt, format, sizeof(*fmt)); /* The video port interface truncates the data to 10 bits. */ info = omap3isp_video_format_info(fmt->code); fmt->code = info->truncated; /* The number of lines that can be clocked out from the video * port output must be at least one line less than the number * of input lines. */ fmt->width = clamp_t(u32, width, 32, fmt->width); fmt->height = clamp_t(u32, height, 32, fmt->height - 1); break; } /* Data is written to memory unpacked, each 10-bit or 12-bit pixel is * stored on 2 bytes. */ fmt->colorspace = V4L2_COLORSPACE_SRGB; fmt->field = V4L2_FIELD_NONE; } /* * ccdc_try_crop - Validate a crop rectangle * @ccdc: ISP CCDC device * @sink: format on the sink pad * @crop: crop rectangle to be validated */ static void ccdc_try_crop(struct isp_ccdc_device *ccdc, const struct v4l2_mbus_framefmt *sink, struct v4l2_rect *crop) { const struct isp_format_info *info; unsigned int max_width; /* For Bayer formats, restrict left/top and width/height to even values * to keep the Bayer pattern. */ info = omap3isp_video_format_info(sink->code); if (info->flavor != V4L2_MBUS_FMT_Y8_1X8) { crop->left &= ~1; crop->top &= ~1; } crop->left = clamp_t(u32, crop->left, 0, sink->width - CCDC_MIN_WIDTH); crop->top = clamp_t(u32, crop->top, 0, sink->height - CCDC_MIN_HEIGHT); /* The data formatter truncates the number of horizontal output pixels * to a multiple of 16. To avoid clipping data, allow callers to request * an output size bigger than the input size up to the nearest multiple * of 16. */ max_width = (sink->width - crop->left + 15) & ~15; crop->width = clamp_t(u32, crop->width, CCDC_MIN_WIDTH, max_width) & ~15; crop->height = clamp_t(u32, crop->height, CCDC_MIN_HEIGHT, sink->height - crop->top); /* Odd width/height values don't make sense for Bayer formats. */ if (info->flavor != V4L2_MBUS_FMT_Y8_1X8) { crop->width &= ~1; crop->height &= ~1; } } /* * ccdc_enum_mbus_code - Handle pixel format enumeration * @sd : pointer to v4l2 subdev structure * @fh : V4L2 subdev file handle * @code : pointer to v4l2_subdev_mbus_code_enum structure * return -EINVAL or zero on success */ static int ccdc_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, struct v4l2_subdev_mbus_code_enum *code) { struct isp_ccdc_device *ccdc = v4l2_get_subdevdata(sd); struct v4l2_mbus_framefmt *format; switch (code->pad) { case CCDC_PAD_SINK: if (code->index >= ARRAY_SIZE(ccdc_fmts)) return -EINVAL; code->code = ccdc_fmts[code->index]; break; case CCDC_PAD_SOURCE_OF: case CCDC_PAD_SOURCE_VP: /* No format conversion inside CCDC */ if (code->index != 0) return -EINVAL; format = __ccdc_get_format(ccdc, fh, CCDC_PAD_SINK, V4L2_SUBDEV_FORMAT_TRY); code->code = format->code; break; default: return -EINVAL; } return 0; } static int ccdc_enum_frame_size(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, struct v4l2_subdev_frame_size_enum *fse) { struct isp_ccdc_device *ccdc = 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; ccdc_try_format(ccdc, fh, fse->pad, &format, V4L2_SUBDEV_FORMAT_TRY); 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; ccdc_try_format(ccdc, fh, fse->pad, &format, V4L2_SUBDEV_FORMAT_TRY); fse->max_width = format.width; fse->max_height = format.height; return 0; } /* * ccdc_get_selection - Retrieve a selection rectangle on a pad * @sd: ISP CCDC V4L2 subdevice * @fh: V4L2 subdev file handle * @sel: Selection rectangle * * The only supported rectangles are the crop rectangles on the output formatter * source pad. * * Return 0 on success or a negative error code otherwise. */ static int ccdc_get_selection(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, struct v4l2_subdev_selection *sel) { struct isp_ccdc_device *ccdc = v4l2_get_subdevdata(sd); struct v4l2_mbus_framefmt *format; if (sel->pad != CCDC_PAD_SOURCE_OF) return -EINVAL; switch (sel->target) { case V4L2_SEL_TGT_CROP_BOUNDS: sel->r.left = 0; sel->r.top = 0; sel->r.width = INT_MAX; sel->r.height = INT_MAX; format = __ccdc_get_format(ccdc, fh, CCDC_PAD_SINK, sel->which); ccdc_try_crop(ccdc, format, &sel->r); break; case V4L2_SEL_TGT_CROP: sel->r = *__ccdc_get_crop(ccdc, fh, sel->which); break; default: return -EINVAL; } return 0; } /* * ccdc_set_selection - Set a selection rectangle on a pad * @sd: ISP CCDC V4L2 subdevice * @fh: V4L2 subdev file handle * @sel: Selection rectangle * * The only supported rectangle is the actual crop rectangle on the output * formatter source pad. * * Return 0 on success or a negative error code otherwise. */ static int ccdc_set_selection(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, struct v4l2_subdev_selection *sel) { struct isp_ccdc_device *ccdc = v4l2_get_subdevdata(sd); struct v4l2_mbus_framefmt *format; if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != CCDC_PAD_SOURCE_OF) return -EINVAL; /* The crop rectangle can't be changed while streaming. */ if (ccdc->state != ISP_PIPELINE_STREAM_STOPPED) return -EBUSY; /* Modifying the crop rectangle always changes the format on the source * pad. If the KEEP_CONFIG flag is set, just return the current crop * rectangle. */ if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) { sel->r = *__ccdc_get_crop(ccdc, fh, sel->which); return 0; } format = __ccdc_get_format(ccdc, fh, CCDC_PAD_SINK, sel->which); ccdc_try_crop(ccdc, format, &sel->r); *__ccdc_get_crop(ccdc, fh, sel->which) = sel->r; /* Update the source format. */ format = __ccdc_get_format(ccdc, fh, CCDC_PAD_SOURCE_OF, sel->which); ccdc_try_format(ccdc, fh, CCDC_PAD_SOURCE_OF, format, sel->which); return 0; } /* * ccdc_get_format - Retrieve the video format on a pad * @sd : ISP CCDC V4L2 subdevice * @fh : V4L2 subdev file handle * @fmt: Format * * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond * to the format type. */ static int ccdc_get_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, struct v4l2_subdev_format *fmt) { struct isp_ccdc_device *ccdc = v4l2_get_subdevdata(sd); struct v4l2_mbus_framefmt *format; format = __ccdc_get_format(ccdc, fh, fmt->pad, fmt->which); if (format == NULL) return -EINVAL; fmt->format = *format; return 0; } /* * ccdc_set_format - Set the video format on a pad * @sd : ISP CCDC V4L2 subdevice * @fh : V4L2 subdev file handle * @fmt: Format * * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond * to the format type. */ static int ccdc_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, struct v4l2_subdev_format *fmt) { struct isp_ccdc_device *ccdc = v4l2_get_subdevdata(sd); struct v4l2_mbus_framefmt *format; struct v4l2_rect *crop; format = __ccdc_get_format(ccdc, fh, fmt->pad, fmt->which); if (format == NULL) return -EINVAL; ccdc_try_format(ccdc, fh, fmt->pad, &fmt->format, fmt->which); *format = fmt->format; /* Propagate the format from sink to source */ if (fmt->pad == CCDC_PAD_SINK) { /* Reset the crop rectangle. */ crop = __ccdc_get_crop(ccdc, fh, fmt->which); crop->left = 0; crop->top = 0; crop->width = fmt->format.width; crop->height = fmt->format.height; ccdc_try_crop(ccdc, &fmt->format, crop); /* Update the source formats. */ format = __ccdc_get_format(ccdc, fh, CCDC_PAD_SOURCE_OF, fmt->which); *format = fmt->format; ccdc_try_format(ccdc, fh, CCDC_PAD_SOURCE_OF, format, fmt->which); format = __ccdc_get_format(ccdc, fh, CCDC_PAD_SOURCE_VP, fmt->which); *format = fmt->format; ccdc_try_format(ccdc, fh, CCDC_PAD_SOURCE_VP, format, fmt->which); } return 0; } /* * Decide whether desired output pixel code can be obtained with * the lane shifter by shifting the input pixel code. * @in: input pixelcode to shifter * @out: output pixelcode from shifter * @additional_shift: # of bits the sensor's LSB is offset from CAMEXT[0] * * return true if the combination is possible * return false otherwise */ static bool ccdc_is_shiftable(enum v4l2_mbus_pixelcode in, enum v4l2_mbus_pixelcode out, unsigned int additional_shift) { const struct isp_format_info *in_info, *out_info; if (in == out) return true; in_info = omap3isp_video_format_info(in); out_info = omap3isp_video_format_info(out); if ((in_info->flavor == 0) || (out_info->flavor == 0)) return false; if (in_info->flavor != out_info->flavor) return false; return in_info->width - out_info->width + additional_shift <= 6; } static int ccdc_link_validate(struct v4l2_subdev *sd, struct media_link *link, struct v4l2_subdev_format *source_fmt, struct v4l2_subdev_format *sink_fmt) { struct isp_ccdc_device *ccdc = v4l2_get_subdevdata(sd); unsigned long parallel_shift; /* Check if the two ends match */ if (source_fmt->format.width != sink_fmt->format.width || source_fmt->format.height != sink_fmt->format.height) return -EPIPE; /* We've got a parallel sensor here. */ if (ccdc->input == CCDC_INPUT_PARALLEL) { struct isp_parallel_platform_data *pdata = &((struct isp_v4l2_subdevs_group *) media_entity_to_v4l2_subdev(link->source->entity) ->host_priv)->bus.parallel; parallel_shift = pdata->data_lane_shift * 2; } else { parallel_shift = 0; } /* Lane shifter may be used to drop bits on CCDC sink pad */ if (!ccdc_is_shiftable(source_fmt->format.code, sink_fmt->format.code, parallel_shift)) return -EPIPE; return 0; } /* * ccdc_init_formats - Initialize formats on all pads * @sd: ISP CCDC V4L2 subdevice * @fh: V4L2 subdev file handle * * Initialize all pad formats with default values. If fh is not NULL, try * formats are initialized on the file handle. Otherwise active formats are * initialized on the device. */ static int ccdc_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) { struct v4l2_subdev_format format; memset(&format, 0, sizeof(format)); format.pad = CCDC_PAD_SINK; format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE; format.format.code = V4L2_MBUS_FMT_SGRBG10_1X10; format.format.width = 4096; format.format.height = 4096; ccdc_set_format(sd, fh, &format); return 0; } /* V4L2 subdev core operations */ static const struct v4l2_subdev_core_ops ccdc_v4l2_core_ops = { .ioctl = ccdc_ioctl, .subscribe_event = ccdc_subscribe_event, .unsubscribe_event = ccdc_unsubscribe_event, }; /* V4L2 subdev video operations */ static const struct v4l2_subdev_video_ops ccdc_v4l2_video_ops = { .s_stream = ccdc_set_stream, }; /* V4L2 subdev pad operations */ static const struct v4l2_subdev_pad_ops ccdc_v4l2_pad_ops = { .enum_mbus_code = ccdc_enum_mbus_code, .enum_frame_size = ccdc_enum_frame_size, .get_fmt = ccdc_get_format, .set_fmt = ccdc_set_format, .get_selection = ccdc_get_selection, .set_selection = ccdc_set_selection, .link_validate = ccdc_link_validate, }; /* V4L2 subdev operations */ static const struct v4l2_subdev_ops ccdc_v4l2_ops = { .core = &ccdc_v4l2_core_ops, .video = &ccdc_v4l2_video_ops, .pad = &ccdc_v4l2_pad_ops, }; /* V4L2 subdev internal operations */ static const struct v4l2_subdev_internal_ops ccdc_v4l2_internal_ops = { .open = ccdc_init_formats, }; /* ----------------------------------------------------------------------------- * Media entity operations */ /* * ccdc_link_setup - Setup CCDC connections * @entity: CCDC media entity * @local: Pad at the local end of the link * @remote: Pad at the remote end of the link * @flags: Link flags * * return -EINVAL or zero on success */ static int ccdc_link_setup(struct media_entity *entity, const struct media_pad *local, const struct media_pad *remote, u32 flags) { struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity); struct isp_ccdc_device *ccdc = v4l2_get_subdevdata(sd); struct isp_device *isp = to_isp_device(ccdc); switch (local->index | media_entity_type(remote->entity)) { case CCDC_PAD_SINK | MEDIA_ENT_T_V4L2_SUBDEV: /* Read from the sensor (parallel interface), CCP2, CSI2a or * CSI2c. */ if (!(flags & MEDIA_LNK_FL_ENABLED)) { ccdc->input = CCDC_INPUT_NONE; break; } if (ccdc->input != CCDC_INPUT_NONE) return -EBUSY; if (remote->entity == &isp->isp_ccp2.subdev.entity) ccdc->input = CCDC_INPUT_CCP2B; else if (remote->entity == &isp->isp_csi2a.subdev.entity) ccdc->input = CCDC_INPUT_CSI2A; else if (remote->entity == &isp->isp_csi2c.subdev.entity) ccdc->input = CCDC_INPUT_CSI2C; else ccdc->input = CCDC_INPUT_PARALLEL; break; /* * The ISP core doesn't support pipelines with multiple video outputs. * Revisit this when it will be implemented, and return -EBUSY for now. */ case CCDC_PAD_SOURCE_VP | MEDIA_ENT_T_V4L2_SUBDEV: /* Write to preview engine, histogram and H3A. When none of * those links are active, the video port can be disabled. */ if (flags & MEDIA_LNK_FL_ENABLED) { if (ccdc->output & ~CCDC_OUTPUT_PREVIEW) return -EBUSY; ccdc->output |= CCDC_OUTPUT_PREVIEW; } else { ccdc->output &= ~CCDC_OUTPUT_PREVIEW; } break; case CCDC_PAD_SOURCE_OF | MEDIA_ENT_T_DEVNODE: /* Write to memory */ if (flags & MEDIA_LNK_FL_ENABLED) { if (ccdc->output & ~CCDC_OUTPUT_MEMORY) return -EBUSY; ccdc->output |= CCDC_OUTPUT_MEMORY; } else { ccdc->output &= ~CCDC_OUTPUT_MEMORY; } break; case CCDC_PAD_SOURCE_OF | MEDIA_ENT_T_V4L2_SUBDEV: /* Write to resizer */ if (flags & MEDIA_LNK_FL_ENABLED) { if (ccdc->output & ~CCDC_OUTPUT_RESIZER) return -EBUSY; ccdc->output |= CCDC_OUTPUT_RESIZER; } else { ccdc->output &= ~CCDC_OUTPUT_RESIZER; } break; default: return -EINVAL; } return 0; } /* media operations */ static const struct media_entity_operations ccdc_media_ops = { .link_setup = ccdc_link_setup, .link_validate = v4l2_subdev_link_validate, }; void omap3isp_ccdc_unregister_entities(struct isp_ccdc_device *ccdc) { v4l2_device_unregister_subdev(&ccdc->subdev); omap3isp_video_unregister(&ccdc->video_out); } int omap3isp_ccdc_register_entities(struct isp_ccdc_device *ccdc, struct v4l2_device *vdev) { int ret; /* Register the subdev and video node. */ ret = v4l2_device_register_subdev(vdev, &ccdc->subdev); if (ret < 0) goto error; ret = omap3isp_video_register(&ccdc->video_out, vdev); if (ret < 0) goto error; return 0; error: omap3isp_ccdc_unregister_entities(ccdc); return ret; } /* ----------------------------------------------------------------------------- * ISP CCDC initialisation and cleanup */ /* * ccdc_init_entities - Initialize V4L2 subdev and media entity * @ccdc: ISP CCDC module * * Return 0 on success and a negative error code on failure. */ static int ccdc_init_entities(struct isp_ccdc_device *ccdc) { struct v4l2_subdev *sd = &ccdc->subdev; struct media_pad *pads = ccdc->pads; struct media_entity *me = &sd->entity; int ret; ccdc->input = CCDC_INPUT_NONE; v4l2_subdev_init(sd, &ccdc_v4l2_ops); sd->internal_ops = &ccdc_v4l2_internal_ops; strlcpy(sd->name, "OMAP3 ISP CCDC", sizeof(sd->name)); sd->grp_id = 1 << 16; /* group ID for isp subdevs */ v4l2_set_subdevdata(sd, ccdc); sd->flags |= V4L2_SUBDEV_FL_HAS_EVENTS | V4L2_SUBDEV_FL_HAS_DEVNODE; pads[CCDC_PAD_SINK].flags = MEDIA_PAD_FL_SINK; pads[CCDC_PAD_SOURCE_VP].flags = MEDIA_PAD_FL_SOURCE; pads[CCDC_PAD_SOURCE_OF].flags = MEDIA_PAD_FL_SOURCE; me->ops = &ccdc_media_ops; ret = media_entity_init(me, CCDC_PADS_NUM, pads, 0); if (ret < 0) return ret; ccdc_init_formats(sd, NULL); ccdc->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; ccdc->video_out.ops = &ccdc_video_ops; ccdc->video_out.isp = to_isp_device(ccdc); ccdc->video_out.capture_mem = PAGE_ALIGN(4096 * 4096) * 3; ccdc->video_out.bpl_alignment = 32; ret = omap3isp_video_init(&ccdc->video_out, "CCDC"); if (ret < 0) goto error_video; /* Connect the CCDC subdev to the video node. */ ret = media_entity_create_link(&ccdc->subdev.entity, CCDC_PAD_SOURCE_OF, &ccdc->video_out.video.entity, 0, 0); if (ret < 0) goto error_link; return 0; error_link: omap3isp_video_cleanup(&ccdc->video_out); error_video: media_entity_cleanup(me); return ret; } /* * omap3isp_ccdc_init - CCDC module initialization. * @dev: Device pointer specific to the OMAP3 ISP. * * TODO: Get the initialisation values from platform data. * * Return 0 on success or a negative error code otherwise. */ int omap3isp_ccdc_init(struct isp_device *isp) { struct isp_ccdc_device *ccdc = &isp->isp_ccdc; int ret; spin_lock_init(&ccdc->lock); init_waitqueue_head(&ccdc->wait); mutex_init(&ccdc->ioctl_lock); ccdc->stopping = CCDC_STOP_NOT_REQUESTED; INIT_WORK(&ccdc->lsc.table_work, ccdc_lsc_free_table_work); ccdc->lsc.state = LSC_STATE_STOPPED; INIT_LIST_HEAD(&ccdc->lsc.free_queue); spin_lock_init(&ccdc->lsc.req_lock); ccdc->clamp.oblen = 0; ccdc->clamp.dcsubval = 0; ccdc->update = OMAP3ISP_CCDC_BLCLAMP; ccdc_apply_controls(ccdc); ret = ccdc_init_entities(ccdc); if (ret < 0) { mutex_destroy(&ccdc->ioctl_lock); return ret; } return 0; } /* * omap3isp_ccdc_cleanup - CCDC module cleanup. * @dev: Device pointer specific to the OMAP3 ISP. */ void omap3isp_ccdc_cleanup(struct isp_device *isp) { struct isp_ccdc_device *ccdc = &isp->isp_ccdc; omap3isp_video_cleanup(&ccdc->video_out); media_entity_cleanup(&ccdc->subdev.entity); /* Free LSC requests. As the CCDC is stopped there's no active request, * so only the pending request and the free queue need to be handled. */ ccdc_lsc_free_request(ccdc, ccdc->lsc.request); cancel_work_sync(&ccdc->lsc.table_work); ccdc_lsc_free_queue(ccdc, &ccdc->lsc.free_queue); if (ccdc->fpc.fpcaddr != 0) omap_iommu_vfree(isp->domain, isp->dev, ccdc->fpc.fpcaddr); mutex_destroy(&ccdc->ioctl_lock); }