diff options
Diffstat (limited to 'drivers/media/video/omap3isp/ispccdc.c')
| -rw-r--r-- | drivers/media/video/omap3isp/ispccdc.c | 2268 |
1 files changed, 2268 insertions, 0 deletions
diff --git a/drivers/media/video/omap3isp/ispccdc.c b/drivers/media/video/omap3isp/ispccdc.c new file mode 100644 index 000000000000..5ff9d14ce710 --- /dev/null +++ b/drivers/media/video/omap3isp/ispccdc.c @@ -0,0 +1,2268 @@ +/* + * ispccdc.c + * + * TI OMAP3 ISP - CCDC module + * + * Copyright (C) 2009-2010 Nokia Corporation + * Copyright (C) 2009 Texas Instruments, Inc. + * + * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com> + * Sakari Ailus <sakari.ailus@iki.fi> + * + * 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 <linux/module.h> +#include <linux/uaccess.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/dma-mapping.h> +#include <linux/mm.h> +#include <linux/sched.h> +#include <media/v4l2-event.h> + +#include "isp.h" +#include "ispreg.h" +#include "ispccdc.h" + +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_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) + iommu_vfree(isp->iommu, 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 = iommu_vmalloc(isp->iommu, 0, req->config.size, + IOMMU_FLAG); + if (IS_ERR_VALUE(req->table)) { + req->table = 0; + ret = -ENOMEM; + goto done; + } + + req->iovm = find_iovm_area(isp->iommu, 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 = da_to_va(isp->iommu, 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); + u32 alaw = 0; + + switch (ccdc->syncif.datsz) { + 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 iommu_vmalloc(). + */ + size = ccdc->fpc.fpnum * 4; + table_new = iommu_vmalloc(isp->iommu, 0, size, + IOMMU_FLAG); + if (IS_ERR_VALUE(table_new)) + return -ENOMEM; + + if (copy_from_user(da_to_va(isp->iommu, table_new), + (__force void __user *) + ccdc->fpc.fpcaddr, size)) { + iommu_vfree(isp->iommu, table_new); + return -EFAULT; + } + + table_old = ccdc->fpc.fpcaddr; + ccdc->fpc.fpcaddr = table_new; + } + + ccdc_configure_fpc(ccdc); + if (table_old != 0) + iommu_vfree(isp->iommu, 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); + 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); + + switch (ccdc->syncif.datsz) { + 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 (ccdc->vpcfg.pixelclk) + div = l3_ick / ccdc->vpcfg.pixelclk; + + 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. + * @syncif: Structure containing the sync parameters like field state, CCDC in + * master/slave mode, raw/yuv data, polarity of data, field, hs, vs + * signals. + */ +static void ccdc_config_sync_if(struct isp_ccdc_device *ccdc, + struct ispccdc_syncif *syncif) +{ + struct isp_device *isp = to_isp_device(ccdc); + u32 syn_mode = isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCDC, + ISPCCDC_SYN_MODE); + + syn_mode |= ISPCCDC_SYN_MODE_VDHDEN; + + if (syncif->fldstat) + syn_mode |= ISPCCDC_SYN_MODE_FLDSTAT; + else + syn_mode &= ~ISPCCDC_SYN_MODE_FLDSTAT; + + syn_mode &= ~ISPCCDC_SYN_MODE_DATSIZ_MASK; + switch (syncif->datsz) { + 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 (syncif->fldmode) + syn_mode |= ISPCCDC_SYN_MODE_FLDMODE; + else + syn_mode &= ~ISPCCDC_SYN_MODE_FLDMODE; + + if (syncif->datapol) + syn_mode |= ISPCCDC_SYN_MODE_DATAPOL; + else + syn_mode &= ~ISPCCDC_SYN_MODE_DATAPOL; + + if (syncif->fldpol) + syn_mode |= ISPCCDC_SYN_MODE_FLDPOL; + else + syn_mode &= ~ISPCCDC_SYN_MODE_FLDPOL; + + if (syncif->hdpol) + syn_mode |= ISPCCDC_SYN_MODE_HDPOL; + else + syn_mode &= ~ISPCCDC_SYN_MODE_HDPOL; + + if (syncif->vdpol) + syn_mode |= ISPCCDC_SYN_MODE_VDPOL; + else + syn_mode &= ~ISPCCDC_SYN_MODE_VDPOL; + + if (syncif->ccdc_mastermode) { + syn_mode |= ISPCCDC_SYN_MODE_FLDOUT | ISPCCDC_SYN_MODE_VDHDOUT; + isp_reg_writel(isp, + syncif->hs_width << ISPCCDC_HD_VD_WID_HDW_SHIFT + | syncif->vs_width << ISPCCDC_HD_VD_WID_VDW_SHIFT, + OMAP3_ISP_IOMEM_CCDC, + ISPCCDC_HD_VD_WID); + + isp_reg_writel(isp, + syncif->ppln << ISPCCDC_PIX_LINES_PPLN_SHIFT + | syncif->hlprf << ISPCCDC_PIX_LINES_HLPRF_SHIFT, + OMAP3_ISP_IOMEM_CCDC, + ISPCCDC_PIX_LINES); + } else + syn_mode &= ~(ISPCCDC_SYN_MODE_FLDOUT | + ISPCCDC_SYN_MODE_VDHDOUT); + + isp_reg_writel(isp, syn_mode, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_SYN_MODE); + + if (!syncif->bt_r656_en) + isp_reg_clr(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_REC656IF, + ISPCCDC_REC656IF_R656ON); +} + +/* 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; + struct media_pad *pad; + unsigned long flags; + u32 syn_mode; + u32 ccdc_pattern; + + if (ccdc->input == CCDC_INPUT_PARALLEL) { + pad = media_entity_remote_source(&ccdc->pads[CCDC_PAD_SINK]); + sensor = media_entity_to_v4l2_subdev(pad->entity); + pdata = &((struct isp_v4l2_subdevs_group *)sensor->host_priv) + ->bus.parallel; + } + + omap3isp_configure_bridge(isp, ccdc->input, pdata); + + ccdc->syncif.datsz = pdata ? pdata->width : 10; + ccdc_config_sync_if(ccdc, &ccdc->syncif); + + /* 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)->bpp <= 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 */ + format = &ccdc->formats[CCDC_PAD_SOURCE_OF]; + + isp_reg_writel(isp, (0 << ISPCCDC_HORZ_INFO_SPH_SHIFT) | + ((format->width - 1) << ISPCCDC_HORZ_INFO_NPH_SHIFT), + OMAP3_ISP_IOMEM_CCDC, ISPCCDC_HORZ_INFO); + isp_reg_writel(isp, 0 << ISPCCDC_VERT_START_SLV0_SHIFT, + OMAP3_ISP_IOMEM_CCDC, ISPCCDC_VERT_START); + isp_reg_writel(isp, (format->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 satisfyied, + * 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 video_device *vdev = &ccdc->subdev.devnode; + struct v4l2_event event; + + memset(&event, 0, sizeof(event)); + event.type = V4L2_EVENT_OMAP3ISP_HS_VS; + + 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) { + ccdc_lsc_error_handler(ccdc); + ccdc->error = 1; + 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, ccdc->error); + 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: + ccdc->error = 0; + 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 in + * 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_OMAP3ISP_HS_VS) + return -EINVAL; + + return v4l2_event_subscribe(fh, sub); +} + +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->error = 0; + 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]; +} + +/* + * 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; + 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)); + + /* 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. + */ + fmt->width = clamp_t(u32, width, 32, (fmt->width + 15) & ~15); + fmt->width &= ~15; + fmt->height = clamp_t(u32, height, 32, fmt->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_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_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; + + 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) { + 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; +} + +/* + * 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, +}; + +/* 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, +}; + +/* + * 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; + sd->nevents = OMAP3ISP_CCDC_NEVENTS; + + 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) + return ret; + + /* 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) + return ret; + + return 0; +} + +void omap3isp_ccdc_unregister_entities(struct isp_ccdc_device *ccdc) +{ + media_entity_cleanup(&ccdc->subdev.entity); + + 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 + */ + +/* + * 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; + + 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->syncif.ccdc_mastermode = 0; + ccdc->syncif.datapol = 0; + ccdc->syncif.datsz = 0; + ccdc->syncif.fldmode = 0; + ccdc->syncif.fldout = 0; + ccdc->syncif.fldpol = 0; + ccdc->syncif.fldstat = 0; + ccdc->syncif.hdpol = 0; + ccdc->syncif.vdpol = 0; + + ccdc->clamp.oblen = 0; + ccdc->clamp.dcsubval = 0; + + ccdc->vpcfg.pixelclk = 0; + + ccdc->update = OMAP3ISP_CCDC_BLCLAMP; + ccdc_apply_controls(ccdc); + + return ccdc_init_entities(ccdc); +} + +/* + * 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; + + /* 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) + iommu_vfree(isp->iommu, ccdc->fpc.fpcaddr); +} |