diff options
Diffstat (limited to 'drivers/media/platform/atmel/atmel-isc.c')
| -rw-r--r-- | drivers/media/platform/atmel/atmel-isc.c | 1947 |
1 files changed, 0 insertions, 1947 deletions
diff --git a/drivers/media/platform/atmel/atmel-isc.c b/drivers/media/platform/atmel/atmel-isc.c deleted file mode 100644 index d6534252cdcd..000000000000 --- a/drivers/media/platform/atmel/atmel-isc.c +++ /dev/null @@ -1,1947 +0,0 @@ -/* - * Atmel Image Sensor Controller (ISC) driver - * - * Copyright (C) 2016 Atmel - * - * Author: Songjun Wu <songjun.wu@microchip.com> - * - * This program is free software; you may redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * Sensor-->PFE-->WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB-->RLP-->DMA - * - * ISC video pipeline integrates the following submodules: - * PFE: Parallel Front End to sample the camera sensor input stream - * WB: Programmable white balance in the Bayer domain - * CFA: Color filter array interpolation module - * CC: Programmable color correction - * GAM: Gamma correction - * CSC: Programmable color space conversion - * CBC: Contrast and Brightness control - * SUB: This module performs YCbCr444 to YCbCr420 chrominance subsampling - * RLP: This module performs rounding, range limiting - * and packing of the incoming data - */ - -#include <linux/clk.h> -#include <linux/clkdev.h> -#include <linux/clk-provider.h> -#include <linux/delay.h> -#include <linux/interrupt.h> -#include <linux/math64.h> -#include <linux/module.h> -#include <linux/of.h> -#include <linux/of_graph.h> -#include <linux/platform_device.h> -#include <linux/pm_runtime.h> -#include <linux/regmap.h> -#include <linux/videodev2.h> - -#include <media/v4l2-ctrls.h> -#include <media/v4l2-device.h> -#include <media/v4l2-event.h> -#include <media/v4l2-image-sizes.h> -#include <media/v4l2-ioctl.h> -#include <media/v4l2-fwnode.h> -#include <media/v4l2-subdev.h> -#include <media/videobuf2-dma-contig.h> - -#include "atmel-isc-regs.h" - -#define ATMEL_ISC_NAME "atmel_isc" - -#define ISC_MAX_SUPPORT_WIDTH 2592 -#define ISC_MAX_SUPPORT_HEIGHT 1944 - -#define ISC_CLK_MAX_DIV 255 - -enum isc_clk_id { - ISC_ISPCK = 0, - ISC_MCK = 1, -}; - -struct isc_clk { - struct clk_hw hw; - struct clk *clk; - struct regmap *regmap; - u8 id; - u8 parent_id; - u32 div; - struct device *dev; -}; - -#define to_isc_clk(hw) container_of(hw, struct isc_clk, hw) - -struct isc_buffer { - struct vb2_v4l2_buffer vb; - struct list_head list; -}; - -struct isc_subdev_entity { - struct v4l2_subdev *sd; - struct v4l2_async_subdev *asd; - struct v4l2_async_notifier notifier; - struct v4l2_subdev_pad_config *config; - - u32 pfe_cfg0; - - struct list_head list; -}; - -/* - * struct isc_format - ISC media bus format information - * @fourcc: Fourcc code for this format - * @mbus_code: V4L2 media bus format code. - * @bpp: Bits per pixel (when stored in memory) - * @reg_bps: reg value for bits per sample - * (when transferred over a bus) - * @pipeline: pipeline switch - * @sd_support: Subdev supports this format - * @isc_support: ISC can convert raw format to this format - */ -struct isc_format { - u32 fourcc; - u32 mbus_code; - u8 bpp; - - u32 reg_bps; - u32 reg_bay_cfg; - u32 reg_rlp_mode; - u32 reg_dcfg_imode; - u32 reg_dctrl_dview; - - u32 pipeline; - - bool sd_support; - bool isc_support; -}; - - -#define HIST_ENTRIES 512 -#define HIST_BAYER (ISC_HIS_CFG_MODE_B + 1) - -enum{ - HIST_INIT = 0, - HIST_ENABLED, - HIST_DISABLED, -}; - -struct isc_ctrls { - struct v4l2_ctrl_handler handler; - - u32 brightness; - u32 contrast; - u8 gamma_index; - u8 awb; - - u32 r_gain; - u32 b_gain; - - u32 hist_entry[HIST_ENTRIES]; - u32 hist_count[HIST_BAYER]; - u8 hist_id; - u8 hist_stat; -}; - -#define ISC_PIPE_LINE_NODE_NUM 11 - -struct isc_device { - struct regmap *regmap; - struct clk *hclock; - struct clk *ispck; - struct isc_clk isc_clks[2]; - - struct device *dev; - struct v4l2_device v4l2_dev; - struct video_device video_dev; - - struct vb2_queue vb2_vidq; - spinlock_t dma_queue_lock; - struct list_head dma_queue; - struct isc_buffer *cur_frm; - unsigned int sequence; - bool stop; - struct completion comp; - - struct v4l2_format fmt; - struct isc_format **user_formats; - unsigned int num_user_formats; - const struct isc_format *current_fmt; - const struct isc_format *raw_fmt; - - struct isc_ctrls ctrls; - struct work_struct awb_work; - - struct mutex lock; - - struct regmap_field *pipeline[ISC_PIPE_LINE_NODE_NUM]; - - struct isc_subdev_entity *current_subdev; - struct list_head subdev_entities; -}; - -#define RAW_FMT_IND_START 0 -#define RAW_FMT_IND_END 11 -#define ISC_FMT_IND_START 12 -#define ISC_FMT_IND_END 14 - -static struct isc_format isc_formats[] = { - { V4L2_PIX_FMT_SBGGR8, MEDIA_BUS_FMT_SBGGR8_1X8, 8, - ISC_PFE_CFG0_BPS_EIGHT, ISC_BAY_CFG_BGBG, ISC_RLP_CFG_MODE_DAT8, - ISC_DCFG_IMODE_PACKED8, ISC_DCTRL_DVIEW_PACKED, 0x0, - false, false }, - { V4L2_PIX_FMT_SGBRG8, MEDIA_BUS_FMT_SGBRG8_1X8, 8, - ISC_PFE_CFG0_BPS_EIGHT, ISC_BAY_CFG_GBGB, ISC_RLP_CFG_MODE_DAT8, - ISC_DCFG_IMODE_PACKED8, ISC_DCTRL_DVIEW_PACKED, 0x0, - false, false }, - { V4L2_PIX_FMT_SGRBG8, MEDIA_BUS_FMT_SGRBG8_1X8, 8, - ISC_PFE_CFG0_BPS_EIGHT, ISC_BAY_CFG_GRGR, ISC_RLP_CFG_MODE_DAT8, - ISC_DCFG_IMODE_PACKED8, ISC_DCTRL_DVIEW_PACKED, 0x0, - false, false }, - { V4L2_PIX_FMT_SRGGB8, MEDIA_BUS_FMT_SRGGB8_1X8, 8, - ISC_PFE_CFG0_BPS_EIGHT, ISC_BAY_CFG_RGRG, ISC_RLP_CFG_MODE_DAT8, - ISC_DCFG_IMODE_PACKED8, ISC_DCTRL_DVIEW_PACKED, 0x0, - false, false }, - - { V4L2_PIX_FMT_SBGGR10, MEDIA_BUS_FMT_SBGGR10_1X10, 16, - ISC_PFG_CFG0_BPS_TEN, ISC_BAY_CFG_BGBG, ISC_RLP_CFG_MODE_DAT10, - ISC_DCFG_IMODE_PACKED16, ISC_DCTRL_DVIEW_PACKED, 0x0, - false, false }, - { V4L2_PIX_FMT_SGBRG10, MEDIA_BUS_FMT_SGBRG10_1X10, 16, - ISC_PFG_CFG0_BPS_TEN, ISC_BAY_CFG_GBGB, ISC_RLP_CFG_MODE_DAT10, - ISC_DCFG_IMODE_PACKED16, ISC_DCTRL_DVIEW_PACKED, 0x0, - false, false }, - { V4L2_PIX_FMT_SGRBG10, MEDIA_BUS_FMT_SGRBG10_1X10, 16, - ISC_PFG_CFG0_BPS_TEN, ISC_BAY_CFG_GRGR, ISC_RLP_CFG_MODE_DAT10, - ISC_DCFG_IMODE_PACKED16, ISC_DCTRL_DVIEW_PACKED, 0x0, - false, false }, - { V4L2_PIX_FMT_SRGGB10, MEDIA_BUS_FMT_SRGGB10_1X10, 16, - ISC_PFG_CFG0_BPS_TEN, ISC_BAY_CFG_RGRG, ISC_RLP_CFG_MODE_DAT10, - ISC_DCFG_IMODE_PACKED16, ISC_DCTRL_DVIEW_PACKED, 0x0, - false, false }, - - { V4L2_PIX_FMT_SBGGR12, MEDIA_BUS_FMT_SBGGR12_1X12, 16, - ISC_PFG_CFG0_BPS_TWELVE, ISC_BAY_CFG_BGBG, ISC_RLP_CFG_MODE_DAT12, - ISC_DCFG_IMODE_PACKED16, ISC_DCTRL_DVIEW_PACKED, 0x0, - false, false }, - { V4L2_PIX_FMT_SGBRG12, MEDIA_BUS_FMT_SGBRG12_1X12, 16, - ISC_PFG_CFG0_BPS_TWELVE, ISC_BAY_CFG_GBGB, ISC_RLP_CFG_MODE_DAT12, - ISC_DCFG_IMODE_PACKED16, ISC_DCTRL_DVIEW_PACKED, 0x0, - false, false }, - { V4L2_PIX_FMT_SGRBG12, MEDIA_BUS_FMT_SGRBG12_1X12, 16, - ISC_PFG_CFG0_BPS_TWELVE, ISC_BAY_CFG_GRGR, ISC_RLP_CFG_MODE_DAT12, - ISC_DCFG_IMODE_PACKED16, ISC_DCTRL_DVIEW_PACKED, 0x0, - false, false }, - { V4L2_PIX_FMT_SRGGB12, MEDIA_BUS_FMT_SRGGB12_1X12, 16, - ISC_PFG_CFG0_BPS_TWELVE, ISC_BAY_CFG_RGRG, ISC_RLP_CFG_MODE_DAT12, - ISC_DCFG_IMODE_PACKED16, ISC_DCTRL_DVIEW_PACKED, 0x0, - false, false }, - - { V4L2_PIX_FMT_YUV420, 0x0, 12, - ISC_PFE_CFG0_BPS_EIGHT, ISC_BAY_CFG_BGBG, ISC_RLP_CFG_MODE_YYCC, - ISC_DCFG_IMODE_YC420P, ISC_DCTRL_DVIEW_PLANAR, 0x7fb, - false, false }, - { V4L2_PIX_FMT_YUV422P, 0x0, 16, - ISC_PFE_CFG0_BPS_EIGHT, ISC_BAY_CFG_BGBG, ISC_RLP_CFG_MODE_YYCC, - ISC_DCFG_IMODE_YC422P, ISC_DCTRL_DVIEW_PLANAR, 0x3fb, - false, false }, - { V4L2_PIX_FMT_RGB565, MEDIA_BUS_FMT_RGB565_2X8_LE, 16, - ISC_PFE_CFG0_BPS_EIGHT, ISC_BAY_CFG_BGBG, ISC_RLP_CFG_MODE_RGB565, - ISC_DCFG_IMODE_PACKED16, ISC_DCTRL_DVIEW_PACKED, 0x7b, - false, false }, - - { V4L2_PIX_FMT_YUYV, MEDIA_BUS_FMT_YUYV8_2X8, 16, - ISC_PFE_CFG0_BPS_EIGHT, ISC_BAY_CFG_BGBG, ISC_RLP_CFG_MODE_DAT8, - ISC_DCFG_IMODE_PACKED8, ISC_DCTRL_DVIEW_PACKED, 0x0, - false, false }, -}; - -#define GAMMA_MAX 2 -#define GAMMA_ENTRIES 64 - -/* Gamma table with gamma 1/2.2 */ -static const u32 isc_gamma_table[GAMMA_MAX + 1][GAMMA_ENTRIES] = { - /* 0 --> gamma 1/1.8 */ - { 0x65, 0x66002F, 0x950025, 0xBB0020, 0xDB001D, 0xF8001A, - 0x1130018, 0x12B0017, 0x1420016, 0x1580014, 0x16D0013, 0x1810012, - 0x1940012, 0x1A60012, 0x1B80011, 0x1C90010, 0x1DA0010, 0x1EA000F, - 0x1FA000F, 0x209000F, 0x218000F, 0x227000E, 0x235000E, 0x243000E, - 0x251000E, 0x25F000D, 0x26C000D, 0x279000D, 0x286000D, 0x293000C, - 0x2A0000C, 0x2AC000C, 0x2B8000C, 0x2C4000C, 0x2D0000B, 0x2DC000B, - 0x2E7000B, 0x2F3000B, 0x2FE000B, 0x309000B, 0x314000B, 0x31F000A, - 0x32A000A, 0x334000B, 0x33F000A, 0x349000A, 0x354000A, 0x35E000A, - 0x368000A, 0x372000A, 0x37C000A, 0x386000A, 0x3900009, 0x399000A, - 0x3A30009, 0x3AD0009, 0x3B60009, 0x3BF000A, 0x3C90009, 0x3D20009, - 0x3DB0009, 0x3E40009, 0x3ED0009, 0x3F60009 }, - - /* 1 --> gamma 1/2 */ - { 0x7F, 0x800034, 0xB50028, 0xDE0021, 0x100001E, 0x11E001B, - 0x1390019, 0x1520017, 0x16A0015, 0x1800014, 0x1940014, 0x1A80013, - 0x1BB0012, 0x1CD0011, 0x1DF0010, 0x1EF0010, 0x200000F, 0x20F000F, - 0x21F000E, 0x22D000F, 0x23C000E, 0x24A000E, 0x258000D, 0x265000D, - 0x273000C, 0x27F000D, 0x28C000C, 0x299000C, 0x2A5000C, 0x2B1000B, - 0x2BC000C, 0x2C8000B, 0x2D3000C, 0x2DF000B, 0x2EA000A, 0x2F5000A, - 0x2FF000B, 0x30A000A, 0x314000B, 0x31F000A, 0x329000A, 0x333000A, - 0x33D0009, 0x3470009, 0x350000A, 0x35A0009, 0x363000A, 0x36D0009, - 0x3760009, 0x37F0009, 0x3880009, 0x3910009, 0x39A0009, 0x3A30009, - 0x3AC0008, 0x3B40009, 0x3BD0008, 0x3C60008, 0x3CE0008, 0x3D60009, - 0x3DF0008, 0x3E70008, 0x3EF0008, 0x3F70008 }, - - /* 2 --> gamma 1/2.2 */ - { 0x99, 0x9B0038, 0xD4002A, 0xFF0023, 0x122001F, 0x141001B, - 0x15D0019, 0x1760017, 0x18E0015, 0x1A30015, 0x1B80013, 0x1CC0012, - 0x1DE0011, 0x1F00010, 0x2010010, 0x2110010, 0x221000F, 0x230000F, - 0x23F000E, 0x24D000E, 0x25B000D, 0x269000C, 0x276000C, 0x283000C, - 0x28F000C, 0x29B000C, 0x2A7000C, 0x2B3000B, 0x2BF000B, 0x2CA000B, - 0x2D5000B, 0x2E0000A, 0x2EB000A, 0x2F5000A, 0x2FF000A, 0x30A000A, - 0x3140009, 0x31E0009, 0x327000A, 0x3310009, 0x33A0009, 0x3440009, - 0x34D0009, 0x3560009, 0x35F0009, 0x3680008, 0x3710008, 0x3790009, - 0x3820008, 0x38A0008, 0x3930008, 0x39B0008, 0x3A30008, 0x3AB0008, - 0x3B30008, 0x3BB0008, 0x3C30008, 0x3CB0007, 0x3D20008, 0x3DA0007, - 0x3E20007, 0x3E90007, 0x3F00008, 0x3F80007 }, -}; - -static unsigned int sensor_preferred = 1; -module_param(sensor_preferred, uint, 0644); -MODULE_PARM_DESC(sensor_preferred, - "Sensor is preferred to output the specified format (1-on 0-off), default 1"); - -static int isc_clk_enable(struct clk_hw *hw) -{ - struct isc_clk *isc_clk = to_isc_clk(hw); - u32 id = isc_clk->id; - struct regmap *regmap = isc_clk->regmap; - - dev_dbg(isc_clk->dev, "ISC CLK: %s, div = %d, parent id = %d\n", - __func__, isc_clk->div, isc_clk->parent_id); - - regmap_update_bits(regmap, ISC_CLKCFG, - ISC_CLKCFG_DIV_MASK(id) | ISC_CLKCFG_SEL_MASK(id), - (isc_clk->div << ISC_CLKCFG_DIV_SHIFT(id)) | - (isc_clk->parent_id << ISC_CLKCFG_SEL_SHIFT(id))); - - regmap_write(regmap, ISC_CLKEN, ISC_CLK(id)); - - return 0; -} - -static void isc_clk_disable(struct clk_hw *hw) -{ - struct isc_clk *isc_clk = to_isc_clk(hw); - u32 id = isc_clk->id; - - regmap_write(isc_clk->regmap, ISC_CLKDIS, ISC_CLK(id)); -} - -static int isc_clk_is_enabled(struct clk_hw *hw) -{ - struct isc_clk *isc_clk = to_isc_clk(hw); - u32 status; - - regmap_read(isc_clk->regmap, ISC_CLKSR, &status); - - return status & ISC_CLK(isc_clk->id) ? 1 : 0; -} - -static unsigned long -isc_clk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) -{ - struct isc_clk *isc_clk = to_isc_clk(hw); - - return DIV_ROUND_CLOSEST(parent_rate, isc_clk->div + 1); -} - -static int isc_clk_determine_rate(struct clk_hw *hw, - struct clk_rate_request *req) -{ - struct isc_clk *isc_clk = to_isc_clk(hw); - long best_rate = -EINVAL; - int best_diff = -1; - unsigned int i, div; - - for (i = 0; i < clk_hw_get_num_parents(hw); i++) { - struct clk_hw *parent; - unsigned long parent_rate; - - parent = clk_hw_get_parent_by_index(hw, i); - if (!parent) - continue; - - parent_rate = clk_hw_get_rate(parent); - if (!parent_rate) - continue; - - for (div = 1; div < ISC_CLK_MAX_DIV + 2; div++) { - unsigned long rate; - int diff; - - rate = DIV_ROUND_CLOSEST(parent_rate, div); - diff = abs(req->rate - rate); - - if (best_diff < 0 || best_diff > diff) { - best_rate = rate; - best_diff = diff; - req->best_parent_rate = parent_rate; - req->best_parent_hw = parent; - } - - if (!best_diff || rate < req->rate) - break; - } - - if (!best_diff) - break; - } - - dev_dbg(isc_clk->dev, - "ISC CLK: %s, best_rate = %ld, parent clk: %s @ %ld\n", - __func__, best_rate, - __clk_get_name((req->best_parent_hw)->clk), - req->best_parent_rate); - - if (best_rate < 0) - return best_rate; - - req->rate = best_rate; - - return 0; -} - -static int isc_clk_set_parent(struct clk_hw *hw, u8 index) -{ - struct isc_clk *isc_clk = to_isc_clk(hw); - - if (index >= clk_hw_get_num_parents(hw)) - return -EINVAL; - - isc_clk->parent_id = index; - - return 0; -} - -static u8 isc_clk_get_parent(struct clk_hw *hw) -{ - struct isc_clk *isc_clk = to_isc_clk(hw); - - return isc_clk->parent_id; -} - -static int isc_clk_set_rate(struct clk_hw *hw, - unsigned long rate, - unsigned long parent_rate) -{ - struct isc_clk *isc_clk = to_isc_clk(hw); - u32 div; - - if (!rate) - return -EINVAL; - - div = DIV_ROUND_CLOSEST(parent_rate, rate); - if (div > (ISC_CLK_MAX_DIV + 1) || !div) - return -EINVAL; - - isc_clk->div = div - 1; - - return 0; -} - -static const struct clk_ops isc_clk_ops = { - .enable = isc_clk_enable, - .disable = isc_clk_disable, - .is_enabled = isc_clk_is_enabled, - .recalc_rate = isc_clk_recalc_rate, - .determine_rate = isc_clk_determine_rate, - .set_parent = isc_clk_set_parent, - .get_parent = isc_clk_get_parent, - .set_rate = isc_clk_set_rate, -}; - -static int isc_clk_register(struct isc_device *isc, unsigned int id) -{ - struct regmap *regmap = isc->regmap; - struct device_node *np = isc->dev->of_node; - struct isc_clk *isc_clk; - struct clk_init_data init; - const char *clk_name = np->name; - const char *parent_names[3]; - int num_parents; - - num_parents = of_clk_get_parent_count(np); - if (num_parents < 1 || num_parents > 3) - return -EINVAL; - - if (num_parents > 2 && id == ISC_ISPCK) - num_parents = 2; - - of_clk_parent_fill(np, parent_names, num_parents); - - if (id == ISC_MCK) - of_property_read_string(np, "clock-output-names", &clk_name); - else - clk_name = "isc-ispck"; - - init.parent_names = parent_names; - init.num_parents = num_parents; - init.name = clk_name; - init.ops = &isc_clk_ops; - init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE; - - isc_clk = &isc->isc_clks[id]; - isc_clk->hw.init = &init; - isc_clk->regmap = regmap; - isc_clk->id = id; - isc_clk->dev = isc->dev; - - isc_clk->clk = clk_register(isc->dev, &isc_clk->hw); - if (IS_ERR(isc_clk->clk)) { - dev_err(isc->dev, "%s: clock register fail\n", clk_name); - return PTR_ERR(isc_clk->clk); - } else if (id == ISC_MCK) - of_clk_add_provider(np, of_clk_src_simple_get, isc_clk->clk); - - return 0; -} - -static int isc_clk_init(struct isc_device *isc) -{ - unsigned int i; - int ret; - - for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) - isc->isc_clks[i].clk = ERR_PTR(-EINVAL); - - for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) { - ret = isc_clk_register(isc, i); - if (ret) - return ret; - } - - return 0; -} - -static void isc_clk_cleanup(struct isc_device *isc) -{ - unsigned int i; - - of_clk_del_provider(isc->dev->of_node); - - for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) { - struct isc_clk *isc_clk = &isc->isc_clks[i]; - - if (!IS_ERR(isc_clk->clk)) - clk_unregister(isc_clk->clk); - } -} - -static int isc_queue_setup(struct vb2_queue *vq, - unsigned int *nbuffers, unsigned int *nplanes, - unsigned int sizes[], struct device *alloc_devs[]) -{ - struct isc_device *isc = vb2_get_drv_priv(vq); - unsigned int size = isc->fmt.fmt.pix.sizeimage; - - if (*nplanes) - return sizes[0] < size ? -EINVAL : 0; - - *nplanes = 1; - sizes[0] = size; - - return 0; -} - -static int isc_buffer_prepare(struct vb2_buffer *vb) -{ - struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); - struct isc_device *isc = vb2_get_drv_priv(vb->vb2_queue); - unsigned long size = isc->fmt.fmt.pix.sizeimage; - - if (vb2_plane_size(vb, 0) < size) { - v4l2_err(&isc->v4l2_dev, "buffer too small (%lu < %lu)\n", - vb2_plane_size(vb, 0), size); - return -EINVAL; - } - - vb2_set_plane_payload(vb, 0, size); - - vbuf->field = isc->fmt.fmt.pix.field; - - return 0; -} - -static inline bool sensor_is_preferred(const struct isc_format *isc_fmt) -{ - return (sensor_preferred && isc_fmt->sd_support) || - !isc_fmt->isc_support; -} - -static void isc_start_dma(struct isc_device *isc) -{ - struct regmap *regmap = isc->regmap; - struct v4l2_pix_format *pixfmt = &isc->fmt.fmt.pix; - u32 sizeimage = pixfmt->sizeimage; - u32 dctrl_dview; - dma_addr_t addr0; - - addr0 = vb2_dma_contig_plane_dma_addr(&isc->cur_frm->vb.vb2_buf, 0); - regmap_write(regmap, ISC_DAD0, addr0); - - switch (pixfmt->pixelformat) { - case V4L2_PIX_FMT_YUV420: - regmap_write(regmap, ISC_DAD1, addr0 + (sizeimage * 2) / 3); - regmap_write(regmap, ISC_DAD2, addr0 + (sizeimage * 5) / 6); - break; - case V4L2_PIX_FMT_YUV422P: - regmap_write(regmap, ISC_DAD1, addr0 + sizeimage / 2); - regmap_write(regmap, ISC_DAD2, addr0 + (sizeimage * 3) / 4); - break; - default: - break; - } - - if (sensor_is_preferred(isc->current_fmt)) - dctrl_dview = ISC_DCTRL_DVIEW_PACKED; - else - dctrl_dview = isc->current_fmt->reg_dctrl_dview; - - regmap_write(regmap, ISC_DCTRL, dctrl_dview | ISC_DCTRL_IE_IS); - regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_CAPTURE); -} - -static void isc_set_pipeline(struct isc_device *isc, u32 pipeline) -{ - struct regmap *regmap = isc->regmap; - struct isc_ctrls *ctrls = &isc->ctrls; - u32 val, bay_cfg; - const u32 *gamma; - unsigned int i; - - /* WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB422-->SUB420 */ - for (i = 0; i < ISC_PIPE_LINE_NODE_NUM; i++) { - val = pipeline & BIT(i) ? 1 : 0; - regmap_field_write(isc->pipeline[i], val); - } - - if (!pipeline) - return; - - bay_cfg = isc->raw_fmt->reg_bay_cfg; - - regmap_write(regmap, ISC_WB_CFG, bay_cfg); - regmap_write(regmap, ISC_WB_O_RGR, 0x0); - regmap_write(regmap, ISC_WB_O_BGR, 0x0); - regmap_write(regmap, ISC_WB_G_RGR, ctrls->r_gain | (0x1 << 25)); - regmap_write(regmap, ISC_WB_G_BGR, ctrls->b_gain | (0x1 << 25)); - - regmap_write(regmap, ISC_CFA_CFG, bay_cfg | ISC_CFA_CFG_EITPOL); - - gamma = &isc_gamma_table[ctrls->gamma_index][0]; - regmap_bulk_write(regmap, ISC_GAM_BENTRY, gamma, GAMMA_ENTRIES); - regmap_bulk_write(regmap, ISC_GAM_GENTRY, gamma, GAMMA_ENTRIES); - regmap_bulk_write(regmap, ISC_GAM_RENTRY, gamma, GAMMA_ENTRIES); - - /* Convert RGB to YUV */ - regmap_write(regmap, ISC_CSC_YR_YG, 0x42 | (0x81 << 16)); - regmap_write(regmap, ISC_CSC_YB_OY, 0x19 | (0x10 << 16)); - regmap_write(regmap, ISC_CSC_CBR_CBG, 0xFDA | (0xFB6 << 16)); - regmap_write(regmap, ISC_CSC_CBB_OCB, 0x70 | (0x80 << 16)); - regmap_write(regmap, ISC_CSC_CRR_CRG, 0x70 | (0xFA2 << 16)); - regmap_write(regmap, ISC_CSC_CRB_OCR, 0xFEE | (0x80 << 16)); - - regmap_write(regmap, ISC_CBC_BRIGHT, ctrls->brightness); - regmap_write(regmap, ISC_CBC_CONTRAST, ctrls->contrast); -} - -static int isc_update_profile(struct isc_device *isc) -{ - struct regmap *regmap = isc->regmap; - u32 sr; - int counter = 100; - - regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_UPPRO); - - regmap_read(regmap, ISC_CTRLSR, &sr); - while ((sr & ISC_CTRL_UPPRO) && counter--) { - usleep_range(1000, 2000); - regmap_read(regmap, ISC_CTRLSR, &sr); - } - - if (counter < 0) { - v4l2_warn(&isc->v4l2_dev, "Time out to update profie\n"); - return -ETIMEDOUT; - } - - return 0; -} - -static void isc_set_histogram(struct isc_device *isc) -{ - struct regmap *regmap = isc->regmap; - struct isc_ctrls *ctrls = &isc->ctrls; - - if (ctrls->awb && (ctrls->hist_stat != HIST_ENABLED)) { - regmap_write(regmap, ISC_HIS_CFG, ISC_HIS_CFG_MODE_R | - (isc->raw_fmt->reg_bay_cfg << ISC_HIS_CFG_BAYSEL_SHIFT) | - ISC_HIS_CFG_RAR); - regmap_write(regmap, ISC_HIS_CTRL, ISC_HIS_CTRL_EN); - regmap_write(regmap, ISC_INTEN, ISC_INT_HISDONE); - ctrls->hist_id = ISC_HIS_CFG_MODE_R; - isc_update_profile(isc); - regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_HISREQ); - - ctrls->hist_stat = HIST_ENABLED; - } else if (!ctrls->awb && (ctrls->hist_stat != HIST_DISABLED)) { - regmap_write(regmap, ISC_INTDIS, ISC_INT_HISDONE); - regmap_write(regmap, ISC_HIS_CTRL, ISC_HIS_CTRL_DIS); - - ctrls->hist_stat = HIST_DISABLED; - } -} - -static inline void isc_get_param(const struct isc_format *fmt, - u32 *rlp_mode, u32 *dcfg) -{ - *dcfg = ISC_DCFG_YMBSIZE_BEATS8; - - switch (fmt->fourcc) { - case V4L2_PIX_FMT_SBGGR10: - case V4L2_PIX_FMT_SGBRG10: - case V4L2_PIX_FMT_SGRBG10: - case V4L2_PIX_FMT_SRGGB10: - case V4L2_PIX_FMT_SBGGR12: - case V4L2_PIX_FMT_SGBRG12: - case V4L2_PIX_FMT_SGRBG12: - case V4L2_PIX_FMT_SRGGB12: - *rlp_mode = fmt->reg_rlp_mode; - *dcfg |= fmt->reg_dcfg_imode; - break; - default: - *rlp_mode = ISC_RLP_CFG_MODE_DAT8; - *dcfg |= ISC_DCFG_IMODE_PACKED8; - break; - } -} - -static int isc_configure(struct isc_device *isc) -{ - struct regmap *regmap = isc->regmap; - const struct isc_format *current_fmt = isc->current_fmt; - struct isc_subdev_entity *subdev = isc->current_subdev; - u32 pfe_cfg0, rlp_mode, dcfg, mask, pipeline; - - if (sensor_is_preferred(current_fmt)) { - pfe_cfg0 = current_fmt->reg_bps; - pipeline = 0x0; - isc_get_param(current_fmt, &rlp_mode, &dcfg); - isc->ctrls.hist_stat = HIST_INIT; - } else { - pfe_cfg0 = isc->raw_fmt->reg_bps; - pipeline = current_fmt->pipeline; - rlp_mode = current_fmt->reg_rlp_mode; - dcfg = current_fmt->reg_dcfg_imode | ISC_DCFG_YMBSIZE_BEATS8 | - ISC_DCFG_CMBSIZE_BEATS8; - } - - pfe_cfg0 |= subdev->pfe_cfg0 | ISC_PFE_CFG0_MODE_PROGRESSIVE; - mask = ISC_PFE_CFG0_BPS_MASK | ISC_PFE_CFG0_HPOL_LOW | - ISC_PFE_CFG0_VPOL_LOW | ISC_PFE_CFG0_PPOL_LOW | - ISC_PFE_CFG0_MODE_MASK; - - regmap_update_bits(regmap, ISC_PFE_CFG0, mask, pfe_cfg0); - - regmap_update_bits(regmap, ISC_RLP_CFG, ISC_RLP_CFG_MODE_MASK, - rlp_mode); - - regmap_write(regmap, ISC_DCFG, dcfg); - - /* Set the pipeline */ - isc_set_pipeline(isc, pipeline); - - if (pipeline) - isc_set_histogram(isc); - - /* Update profile */ - return isc_update_profile(isc); -} - -static int isc_start_streaming(struct vb2_queue *vq, unsigned int count) -{ - struct isc_device *isc = vb2_get_drv_priv(vq); - struct regmap *regmap = isc->regmap; - struct isc_buffer *buf; - unsigned long flags; - int ret; - - /* Enable stream on the sub device */ - ret = v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 1); - if (ret && ret != -ENOIOCTLCMD) { - v4l2_err(&isc->v4l2_dev, "stream on failed in subdev\n"); - goto err_start_stream; - } - - pm_runtime_get_sync(isc->dev); - - ret = isc_configure(isc); - if (unlikely(ret)) - goto err_configure; - - /* Enable DMA interrupt */ - regmap_write(regmap, ISC_INTEN, ISC_INT_DDONE); - - spin_lock_irqsave(&isc->dma_queue_lock, flags); - - isc->sequence = 0; - isc->stop = false; - reinit_completion(&isc->comp); - - isc->cur_frm = list_first_entry(&isc->dma_queue, - struct isc_buffer, list); - list_del(&isc->cur_frm->list); - - isc_start_dma(isc); - - spin_unlock_irqrestore(&isc->dma_queue_lock, flags); - - return 0; - -err_configure: - pm_runtime_put_sync(isc->dev); - - v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 0); - -err_start_stream: - spin_lock_irqsave(&isc->dma_queue_lock, flags); - list_for_each_entry(buf, &isc->dma_queue, list) - vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED); - INIT_LIST_HEAD(&isc->dma_queue); - spin_unlock_irqrestore(&isc->dma_queue_lock, flags); - - return ret; -} - -static void isc_stop_streaming(struct vb2_queue *vq) -{ - struct isc_device *isc = vb2_get_drv_priv(vq); - unsigned long flags; - struct isc_buffer *buf; - int ret; - - isc->stop = true; - - /* Wait until the end of the current frame */ - if (isc->cur_frm && !wait_for_completion_timeout(&isc->comp, 5 * HZ)) - v4l2_err(&isc->v4l2_dev, - "Timeout waiting for end of the capture\n"); - - /* Disable DMA interrupt */ - regmap_write(isc->regmap, ISC_INTDIS, ISC_INT_DDONE); - - pm_runtime_put_sync(isc->dev); - - /* Disable stream on the sub device */ - ret = v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 0); - if (ret && ret != -ENOIOCTLCMD) - v4l2_err(&isc->v4l2_dev, "stream off failed in subdev\n"); - - /* Release all active buffers */ - spin_lock_irqsave(&isc->dma_queue_lock, flags); - if (unlikely(isc->cur_frm)) { - vb2_buffer_done(&isc->cur_frm->vb.vb2_buf, - VB2_BUF_STATE_ERROR); - isc->cur_frm = NULL; - } - list_for_each_entry(buf, &isc->dma_queue, list) - vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); - INIT_LIST_HEAD(&isc->dma_queue); - spin_unlock_irqrestore(&isc->dma_queue_lock, flags); -} - -static void isc_buffer_queue(struct vb2_buffer *vb) -{ - struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); - struct isc_buffer *buf = container_of(vbuf, struct isc_buffer, vb); - struct isc_device *isc = vb2_get_drv_priv(vb->vb2_queue); - unsigned long flags; - - spin_lock_irqsave(&isc->dma_queue_lock, flags); - if (!isc->cur_frm && list_empty(&isc->dma_queue) && - vb2_is_streaming(vb->vb2_queue)) { - isc->cur_frm = buf; - isc_start_dma(isc); - } else - list_add_tail(&buf->list, &isc->dma_queue); - spin_unlock_irqrestore(&isc->dma_queue_lock, flags); -} - -static struct vb2_ops isc_vb2_ops = { - .queue_setup = isc_queue_setup, - .wait_prepare = vb2_ops_wait_prepare, - .wait_finish = vb2_ops_wait_finish, - .buf_prepare = isc_buffer_prepare, - .start_streaming = isc_start_streaming, - .stop_streaming = isc_stop_streaming, - .buf_queue = isc_buffer_queue, -}; - -static int isc_querycap(struct file *file, void *priv, - struct v4l2_capability *cap) -{ - struct isc_device *isc = video_drvdata(file); - - strcpy(cap->driver, ATMEL_ISC_NAME); - strcpy(cap->card, "Atmel Image Sensor Controller"); - snprintf(cap->bus_info, sizeof(cap->bus_info), - "platform:%s", isc->v4l2_dev.name); - - return 0; -} - -static int isc_enum_fmt_vid_cap(struct file *file, void *priv, - struct v4l2_fmtdesc *f) -{ - struct isc_device *isc = video_drvdata(file); - u32 index = f->index; - - if (index >= isc->num_user_formats) - return -EINVAL; - - f->pixelformat = isc->user_formats[index]->fourcc; - - return 0; -} - -static int isc_g_fmt_vid_cap(struct file *file, void *priv, - struct v4l2_format *fmt) -{ - struct isc_device *isc = video_drvdata(file); - - *fmt = isc->fmt; - - return 0; -} - -static struct isc_format *find_format_by_fourcc(struct isc_device *isc, - unsigned int fourcc) -{ - unsigned int num_formats = isc->num_user_formats; - struct isc_format *fmt; - unsigned int i; - - for (i = 0; i < num_formats; i++) { - fmt = isc->user_formats[i]; - if (fmt->fourcc == fourcc) - return fmt; - } - - return NULL; -} - -static int isc_try_fmt(struct isc_device *isc, struct v4l2_format *f, - struct isc_format **current_fmt, u32 *code) -{ - struct isc_format *isc_fmt; - struct v4l2_pix_format *pixfmt = &f->fmt.pix; - struct v4l2_subdev_format format = { - .which = V4L2_SUBDEV_FORMAT_TRY, - }; - u32 mbus_code; - int ret; - - if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) - return -EINVAL; - - isc_fmt = find_format_by_fourcc(isc, pixfmt->pixelformat); - if (!isc_fmt) { - v4l2_warn(&isc->v4l2_dev, "Format 0x%x not found\n", - pixfmt->pixelformat); - isc_fmt = isc->user_formats[isc->num_user_formats - 1]; - pixfmt->pixelformat = isc_fmt->fourcc; - } - - /* Limit to Atmel ISC hardware capabilities */ - if (pixfmt->width > ISC_MAX_SUPPORT_WIDTH) - pixfmt->width = ISC_MAX_SUPPORT_WIDTH; - if (pixfmt->height > ISC_MAX_SUPPORT_HEIGHT) - pixfmt->height = ISC_MAX_SUPPORT_HEIGHT; - - if (sensor_is_preferred(isc_fmt)) - mbus_code = isc_fmt->mbus_code; - else - mbus_code = isc->raw_fmt->mbus_code; - - v4l2_fill_mbus_format(&format.format, pixfmt, mbus_code); - ret = v4l2_subdev_call(isc->current_subdev->sd, pad, set_fmt, - isc->current_subdev->config, &format); - if (ret < 0) - return ret; - - v4l2_fill_pix_format(pixfmt, &format.format); - - pixfmt->field = V4L2_FIELD_NONE; - pixfmt->bytesperline = (pixfmt->width * isc_fmt->bpp) >> 3; - pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height; - - if (current_fmt) - *current_fmt = isc_fmt; - - if (code) - *code = mbus_code; - - return 0; -} - -static int isc_set_fmt(struct isc_device *isc, struct v4l2_format *f) -{ - struct v4l2_subdev_format format = { - .which = V4L2_SUBDEV_FORMAT_ACTIVE, - }; - struct isc_format *current_fmt; - u32 mbus_code; - int ret; - - ret = isc_try_fmt(isc, f, ¤t_fmt, &mbus_code); - if (ret) - return ret; - - v4l2_fill_mbus_format(&format.format, &f->fmt.pix, mbus_code); - ret = v4l2_subdev_call(isc->current_subdev->sd, pad, - set_fmt, NULL, &format); - if (ret < 0) - return ret; - - isc->fmt = *f; - isc->current_fmt = current_fmt; - - return 0; -} - -static int isc_s_fmt_vid_cap(struct file *file, void *priv, - struct v4l2_format *f) -{ - struct isc_device *isc = video_drvdata(file); - - if (vb2_is_streaming(&isc->vb2_vidq)) - return -EBUSY; - - return isc_set_fmt(isc, f); -} - -static int isc_try_fmt_vid_cap(struct file *file, void *priv, - struct v4l2_format *f) -{ - struct isc_device *isc = video_drvdata(file); - - return isc_try_fmt(isc, f, NULL, NULL); -} - -static int isc_enum_input(struct file *file, void *priv, - struct v4l2_input *inp) -{ - if (inp->index != 0) - return -EINVAL; - - inp->type = V4L2_INPUT_TYPE_CAMERA; - inp->std = 0; - strcpy(inp->name, "Camera"); - - return 0; -} - -static int isc_g_input(struct file *file, void *priv, unsigned int *i) -{ - *i = 0; - - return 0; -} - -static int isc_s_input(struct file *file, void *priv, unsigned int i) -{ - if (i > 0) - return -EINVAL; - - return 0; -} - -static int isc_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a) -{ - struct isc_device *isc = video_drvdata(file); - - if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) - return -EINVAL; - - return v4l2_subdev_call(isc->current_subdev->sd, video, g_parm, a); -} - -static int isc_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) -{ - struct isc_device *isc = video_drvdata(file); - - if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) - return -EINVAL; - - return v4l2_subdev_call(isc->current_subdev->sd, video, s_parm, a); -} - -static int isc_enum_framesizes(struct file *file, void *fh, - struct v4l2_frmsizeenum *fsize) -{ - struct isc_device *isc = video_drvdata(file); - const struct isc_format *isc_fmt; - struct v4l2_subdev_frame_size_enum fse = { - .index = fsize->index, - .which = V4L2_SUBDEV_FORMAT_ACTIVE, - }; - int ret; - - isc_fmt = find_format_by_fourcc(isc, fsize->pixel_format); - if (!isc_fmt) - return -EINVAL; - - if (sensor_is_preferred(isc_fmt)) - fse.code = isc_fmt->mbus_code; - else - fse.code = isc->raw_fmt->mbus_code; - - ret = v4l2_subdev_call(isc->current_subdev->sd, pad, enum_frame_size, - NULL, &fse); - if (ret) - return ret; - - fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; - fsize->discrete.width = fse.max_width; - fsize->discrete.height = fse.max_height; - - return 0; -} - -static int isc_enum_frameintervals(struct file *file, void *fh, - struct v4l2_frmivalenum *fival) -{ - struct isc_device *isc = video_drvdata(file); - const struct isc_format *isc_fmt; - struct v4l2_subdev_frame_interval_enum fie = { - .index = fival->index, - .width = fival->width, - .height = fival->height, - .which = V4L2_SUBDEV_FORMAT_ACTIVE, - }; - int ret; - - isc_fmt = find_format_by_fourcc(isc, fival->pixel_format); - if (!isc_fmt) - return -EINVAL; - - if (sensor_is_preferred(isc_fmt)) - fie.code = isc_fmt->mbus_code; - else - fie.code = isc->raw_fmt->mbus_code; - - ret = v4l2_subdev_call(isc->current_subdev->sd, pad, - enum_frame_interval, NULL, &fie); - if (ret) - return ret; - - fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; - fival->discrete = fie.interval; - - return 0; -} - -static const struct v4l2_ioctl_ops isc_ioctl_ops = { - .vidioc_querycap = isc_querycap, - .vidioc_enum_fmt_vid_cap = isc_enum_fmt_vid_cap, - .vidioc_g_fmt_vid_cap = isc_g_fmt_vid_cap, - .vidioc_s_fmt_vid_cap = isc_s_fmt_vid_cap, - .vidioc_try_fmt_vid_cap = isc_try_fmt_vid_cap, - - .vidioc_enum_input = isc_enum_input, - .vidioc_g_input = isc_g_input, - .vidioc_s_input = isc_s_input, - - .vidioc_reqbufs = vb2_ioctl_reqbufs, - .vidioc_querybuf = vb2_ioctl_querybuf, - .vidioc_qbuf = vb2_ioctl_qbuf, - .vidioc_expbuf = vb2_ioctl_expbuf, - .vidioc_dqbuf = vb2_ioctl_dqbuf, - .vidioc_create_bufs = vb2_ioctl_create_bufs, - .vidioc_prepare_buf = vb2_ioctl_prepare_buf, - .vidioc_streamon = vb2_ioctl_streamon, - .vidioc_streamoff = vb2_ioctl_streamoff, - - .vidioc_g_parm = isc_g_parm, - .vidioc_s_parm = isc_s_parm, - .vidioc_enum_framesizes = isc_enum_framesizes, - .vidioc_enum_frameintervals = isc_enum_frameintervals, - - .vidioc_log_status = v4l2_ctrl_log_status, - .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, - .vidioc_unsubscribe_event = v4l2_event_unsubscribe, -}; - -static int isc_open(struct file *file) -{ - struct isc_device *isc = video_drvdata(file); - struct v4l2_subdev *sd = isc->current_subdev->sd; - int ret; - - if (mutex_lock_interruptible(&isc->lock)) - return -ERESTARTSYS; - - ret = v4l2_fh_open(file); - if (ret < 0) - goto unlock; - - if (!v4l2_fh_is_singular_file(file)) - goto unlock; - - ret = v4l2_subdev_call(sd, core, s_power, 1); - if (ret < 0 && ret != -ENOIOCTLCMD) { - v4l2_fh_release(file); - goto unlock; - } - - ret = isc_set_fmt(isc, &isc->fmt); - if (ret) { - v4l2_subdev_call(sd, core, s_power, 0); - v4l2_fh_release(file); - } - -unlock: - mutex_unlock(&isc->lock); - return ret; -} - -static int isc_release(struct file *file) -{ - struct isc_device *isc = video_drvdata(file); - struct v4l2_subdev *sd = isc->current_subdev->sd; - bool fh_singular; - int ret; - - mutex_lock(&isc->lock); - - fh_singular = v4l2_fh_is_singular_file(file); - - ret = _vb2_fop_release(file, NULL); - - if (fh_singular) - v4l2_subdev_call(sd, core, s_power, 0); - - mutex_unlock(&isc->lock); - - return ret; -} - -static const struct v4l2_file_operations isc_fops = { - .owner = THIS_MODULE, - .open = isc_open, - .release = isc_release, - .unlocked_ioctl = video_ioctl2, - .read = vb2_fop_read, - .mmap = vb2_fop_mmap, - .poll = vb2_fop_poll, -}; - -static irqreturn_t isc_interrupt(int irq, void *dev_id) -{ - struct isc_device *isc = (struct isc_device *)dev_id; - struct regmap *regmap = isc->regmap; - u32 isc_intsr, isc_intmask, pending; - irqreturn_t ret = IRQ_NONE; - - regmap_read(regmap, ISC_INTSR, &isc_intsr); - regmap_read(regmap, ISC_INTMASK, &isc_intmask); - - pending = isc_intsr & isc_intmask; - - if (likely(pending & ISC_INT_DDONE)) { - spin_lock(&isc->dma_queue_lock); - if (isc->cur_frm) { - struct vb2_v4l2_buffer *vbuf = &isc->cur_frm->vb; - struct vb2_buffer *vb = &vbuf->vb2_buf; - - vb->timestamp = ktime_get_ns(); - vbuf->sequence = isc->sequence++; - vb2_buffer_done(vb, VB2_BUF_STATE_DONE); - isc->cur_frm = NULL; - } - - if (!list_empty(&isc->dma_queue) && !isc->stop) { - isc->cur_frm = list_first_entry(&isc->dma_queue, - struct isc_buffer, list); - list_del(&isc->cur_frm->list); - - isc_start_dma(isc); - } - - if (isc->stop) - complete(&isc->comp); - - ret = IRQ_HANDLED; - spin_unlock(&isc->dma_queue_lock); - } - - if (pending & ISC_INT_HISDONE) { - schedule_work(&isc->awb_work); - ret = IRQ_HANDLED; - } - - return ret; -} - -static void isc_hist_count(struct isc_device *isc) -{ - struct regmap *regmap = isc->regmap; - struct isc_ctrls *ctrls = &isc->ctrls; - u32 *hist_count = &ctrls->hist_count[ctrls->hist_id]; - u32 *hist_entry = &ctrls->hist_entry[0]; - u32 i; - - regmap_bulk_read(regmap, ISC_HIS_ENTRY, hist_entry, HIST_ENTRIES); - - *hist_count = 0; - for (i = 0; i < HIST_ENTRIES; i++) - *hist_count += i * (*hist_entry++); -} - -static void isc_wb_update(struct isc_ctrls *ctrls) -{ - u32 *hist_count = &ctrls->hist_count[0]; - u64 g_count = (u64)hist_count[ISC_HIS_CFG_MODE_GB] << 9; - u32 hist_r = hist_count[ISC_HIS_CFG_MODE_R]; - u32 hist_b = hist_count[ISC_HIS_CFG_MODE_B]; - - if (hist_r) - ctrls->r_gain = div_u64(g_count, hist_r); - - if (hist_b) - ctrls->b_gain = div_u64(g_count, hist_b); -} - -static void isc_awb_work(struct work_struct *w) -{ - struct isc_device *isc = - container_of(w, struct isc_device, awb_work); - struct regmap *regmap = isc->regmap; - struct isc_ctrls *ctrls = &isc->ctrls; - u32 hist_id = ctrls->hist_id; - u32 baysel; - - if (ctrls->hist_stat != HIST_ENABLED) - return; - - isc_hist_count(isc); - - if (hist_id != ISC_HIS_CFG_MODE_B) { - hist_id++; - } else { - isc_wb_update(ctrls); - hist_id = ISC_HIS_CFG_MODE_R; - } - - ctrls->hist_id = hist_id; - baysel = isc->raw_fmt->reg_bay_cfg << ISC_HIS_CFG_BAYSEL_SHIFT; - - pm_runtime_get_sync(isc->dev); - - regmap_write(regmap, ISC_HIS_CFG, hist_id | baysel | ISC_HIS_CFG_RAR); - isc_update_profile(isc); - regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_HISREQ); - - pm_runtime_put_sync(isc->dev); -} - -static int isc_s_ctrl(struct v4l2_ctrl *ctrl) -{ - struct isc_device *isc = container_of(ctrl->handler, - struct isc_device, ctrls.handler); - struct isc_ctrls *ctrls = &isc->ctrls; - - switch (ctrl->id) { - case V4L2_CID_BRIGHTNESS: - ctrls->brightness = ctrl->val & ISC_CBC_BRIGHT_MASK; - break; - case V4L2_CID_CONTRAST: - ctrls->contrast = ctrl->val & ISC_CBC_CONTRAST_MASK; - break; - case V4L2_CID_GAMMA: - ctrls->gamma_index = ctrl->val; - break; - case V4L2_CID_AUTO_WHITE_BALANCE: - ctrls->awb = ctrl->val; - if (ctrls->hist_stat != HIST_ENABLED) { - ctrls->r_gain = 0x1 << 9; - ctrls->b_gain = 0x1 << 9; - } - break; - default: - return -EINVAL; - } - - return 0; -} - -static const struct v4l2_ctrl_ops isc_ctrl_ops = { - .s_ctrl = isc_s_ctrl, -}; - -static int isc_ctrl_init(struct isc_device *isc) -{ - const struct v4l2_ctrl_ops *ops = &isc_ctrl_ops; - struct isc_ctrls *ctrls = &isc->ctrls; - struct v4l2_ctrl_handler *hdl = &ctrls->handler; - int ret; - - ctrls->hist_stat = HIST_INIT; - - ret = v4l2_ctrl_handler_init(hdl, 4); - if (ret < 0) - return ret; - - v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BRIGHTNESS, -1024, 1023, 1, 0); - v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST, -2048, 2047, 1, 256); - v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAMMA, 0, GAMMA_MAX, 1, 2); - v4l2_ctrl_new_std(hdl, ops, V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1); - - v4l2_ctrl_handler_setup(hdl); - - return 0; -} - - -static int isc_async_bound(struct v4l2_async_notifier *notifier, - struct v4l2_subdev *subdev, - struct v4l2_async_subdev *asd) -{ - struct isc_device *isc = container_of(notifier->v4l2_dev, - struct isc_device, v4l2_dev); - struct isc_subdev_entity *subdev_entity = - container_of(notifier, struct isc_subdev_entity, notifier); - - if (video_is_registered(&isc->video_dev)) { - v4l2_err(&isc->v4l2_dev, "only supports one sub-device.\n"); - return -EBUSY; - } - - subdev_entity->sd = subdev; - - return 0; -} - -static void isc_async_unbind(struct v4l2_async_notifier *notifier, - struct v4l2_subdev *subdev, - struct v4l2_async_subdev *asd) -{ - struct isc_device *isc = container_of(notifier->v4l2_dev, - struct isc_device, v4l2_dev); - cancel_work_sync(&isc->awb_work); - video_unregister_device(&isc->video_dev); - if (isc->current_subdev->config) - v4l2_subdev_free_pad_config(isc->current_subdev->config); - v4l2_ctrl_handler_free(&isc->ctrls.handler); -} - -static struct isc_format *find_format_by_code(unsigned int code, int *index) -{ - struct isc_format *fmt = &isc_formats[0]; - unsigned int i; - - for (i = 0; i < ARRAY_SIZE(isc_formats); i++) { - if (fmt->mbus_code == code) { - *index = i; - return fmt; - } - - fmt++; - } - - return NULL; -} - -static int isc_formats_init(struct isc_device *isc) -{ - struct isc_format *fmt; - struct v4l2_subdev *subdev = isc->current_subdev->sd; - unsigned int num_fmts, i, j; - struct v4l2_subdev_mbus_code_enum mbus_code = { - .which = V4L2_SUBDEV_FORMAT_ACTIVE, - }; - - fmt = &isc_formats[0]; - for (i = 0; i < ARRAY_SIZE(isc_formats); i++) { - fmt->isc_support = false; - fmt->sd_support = false; - - fmt++; - } - - while (!v4l2_subdev_call(subdev, pad, enum_mbus_code, - NULL, &mbus_code)) { - mbus_code.index++; - fmt = find_format_by_code(mbus_code.code, &i); - if (!fmt) - continue; - - fmt->sd_support = true; - - if (i <= RAW_FMT_IND_END) { - for (j = ISC_FMT_IND_START; j <= ISC_FMT_IND_END; j++) - isc_formats[j].isc_support = true; - - isc->raw_fmt = fmt; - } - } - - fmt = &isc_formats[0]; - for (i = 0, num_fmts = 0; i < ARRAY_SIZE(isc_formats); i++) { - if (fmt->isc_support || fmt->sd_support) - num_fmts++; - - fmt++; - } - - if (!num_fmts) - return -ENXIO; - - isc->num_user_formats = num_fmts; - isc->user_formats = devm_kcalloc(isc->dev, - num_fmts, sizeof(struct isc_format *), - GFP_KERNEL); - if (!isc->user_formats) { - v4l2_err(&isc->v4l2_dev, "could not allocate memory\n"); - return -ENOMEM; - } - - fmt = &isc_formats[0]; - for (i = 0, j = 0; i < ARRAY_SIZE(isc_formats); i++) { - if (fmt->isc_support || fmt->sd_support) - isc->user_formats[j++] = fmt; - - fmt++; - } - - return 0; -} - -static int isc_set_default_fmt(struct isc_device *isc) -{ - struct v4l2_format f = { - .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, - .fmt.pix = { - .width = VGA_WIDTH, - .height = VGA_HEIGHT, - .field = V4L2_FIELD_NONE, - .pixelformat = isc->user_formats[0]->fourcc, - }, - }; - int ret; - - ret = isc_try_fmt(isc, &f, NULL, NULL); - if (ret) - return ret; - - isc->current_fmt = isc->user_formats[0]; - isc->fmt = f; - - return 0; -} - -static int isc_async_complete(struct v4l2_async_notifier *notifier) -{ - struct isc_device *isc = container_of(notifier->v4l2_dev, - struct isc_device, v4l2_dev); - struct isc_subdev_entity *sd_entity; - struct video_device *vdev = &isc->video_dev; - struct vb2_queue *q = &isc->vb2_vidq; - int ret; - - ret = v4l2_device_register_subdev_nodes(&isc->v4l2_dev); - if (ret < 0) { - v4l2_err(&isc->v4l2_dev, "Failed to register subdev nodes\n"); - return ret; - } - - isc->current_subdev = container_of(notifier, - struct isc_subdev_entity, notifier); - sd_entity = isc->current_subdev; - - mutex_init(&isc->lock); - init_completion(&isc->comp); - - /* Initialize videobuf2 queue */ - q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ; - q->drv_priv = isc; - q->buf_struct_size = sizeof(struct isc_buffer); - q->ops = &isc_vb2_ops; - q->mem_ops = &vb2_dma_contig_memops; - q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; - q->lock = &isc->lock; - q->min_buffers_needed = 1; - q->dev = isc->dev; - - ret = vb2_queue_init(q); - if (ret < 0) { - v4l2_err(&isc->v4l2_dev, - "vb2_queue_init() failed: %d\n", ret); - return ret; - } - - /* Init video dma queues */ - INIT_LIST_HEAD(&isc->dma_queue); - spin_lock_init(&isc->dma_queue_lock); - - sd_entity->config = v4l2_subdev_alloc_pad_config(sd_entity->sd); - if (sd_entity->config == NULL) - return -ENOMEM; - - ret = isc_formats_init(isc); - if (ret < 0) { - v4l2_err(&isc->v4l2_dev, - "Init format failed: %d\n", ret); - return ret; - } - - ret = isc_set_default_fmt(isc); - if (ret) { - v4l2_err(&isc->v4l2_dev, "Could not set default format\n"); - return ret; - } - - ret = isc_ctrl_init(isc); - if (ret) { - v4l2_err(&isc->v4l2_dev, "Init isc ctrols failed: %d\n", ret); - return ret; - } - - INIT_WORK(&isc->awb_work, isc_awb_work); - - /* Register video device */ - strlcpy(vdev->name, ATMEL_ISC_NAME, sizeof(vdev->name)); - vdev->release = video_device_release_empty; - vdev->fops = &isc_fops; - vdev->ioctl_ops = &isc_ioctl_ops; - vdev->v4l2_dev = &isc->v4l2_dev; - vdev->vfl_dir = VFL_DIR_RX; - vdev->queue = q; - vdev->lock = &isc->lock; - vdev->ctrl_handler = &isc->ctrls.handler; - vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE; - video_set_drvdata(vdev, isc); - - ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1); - if (ret < 0) { - v4l2_err(&isc->v4l2_dev, - "video_register_device failed: %d\n", ret); - return ret; - } - - return 0; -} - -static void isc_subdev_cleanup(struct isc_device *isc) -{ - struct isc_subdev_entity *subdev_entity; - - list_for_each_entry(subdev_entity, &isc->subdev_entities, list) - v4l2_async_notifier_unregister(&subdev_entity->notifier); - - INIT_LIST_HEAD(&isc->subdev_entities); -} - -static int isc_pipeline_init(struct isc_device *isc) -{ - struct device *dev = isc->dev; - struct regmap *regmap = isc->regmap; - struct regmap_field *regs; - unsigned int i; - - /* WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB422-->SUB420 */ - const struct reg_field regfields[ISC_PIPE_LINE_NODE_NUM] = { - REG_FIELD(ISC_WB_CTRL, 0, 0), - REG_FIELD(ISC_CFA_CTRL, 0, 0), - REG_FIELD(ISC_CC_CTRL, 0, 0), - REG_FIELD(ISC_GAM_CTRL, 0, 0), - REG_FIELD(ISC_GAM_CTRL, 1, 1), - REG_FIELD(ISC_GAM_CTRL, 2, 2), - REG_FIELD(ISC_GAM_CTRL, 3, 3), - REG_FIELD(ISC_CSC_CTRL, 0, 0), - REG_FIELD(ISC_CBC_CTRL, 0, 0), - REG_FIELD(ISC_SUB422_CTRL, 0, 0), - REG_FIELD(ISC_SUB420_CTRL, 0, 0), - }; - - for (i = 0; i < ISC_PIPE_LINE_NODE_NUM; i++) { - regs = devm_regmap_field_alloc(dev, regmap, regfields[i]); - if (IS_ERR(regs)) - return PTR_ERR(regs); - - isc->pipeline[i] = regs; - } - - return 0; -} - -static int isc_parse_dt(struct device *dev, struct isc_device *isc) -{ - struct device_node *np = dev->of_node; - struct device_node *epn = NULL, *rem; - struct v4l2_fwnode_endpoint v4l2_epn; - struct isc_subdev_entity *subdev_entity; - unsigned int flags; - int ret; - - INIT_LIST_HEAD(&isc->subdev_entities); - - for (; ;) { - epn = of_graph_get_next_endpoint(np, epn); - if (!epn) - break; - - rem = of_graph_get_remote_port_parent(epn); - if (!rem) { - dev_notice(dev, "Remote device at %s not found\n", - of_node_full_name(epn)); - continue; - } - - ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(epn), - &v4l2_epn); - if (ret) { - of_node_put(rem); - ret = -EINVAL; - dev_err(dev, "Could not parse the endpoint\n"); - break; - } - - subdev_entity = devm_kzalloc(dev, - sizeof(*subdev_entity), GFP_KERNEL); - if (subdev_entity == NULL) { - of_node_put(rem); - ret = -ENOMEM; - break; - } - - subdev_entity->asd = devm_kzalloc(dev, - sizeof(*subdev_entity->asd), GFP_KERNEL); - if (subdev_entity->asd == NULL) { - of_node_put(rem); - ret = -ENOMEM; - break; - } - - flags = v4l2_epn.bus.parallel.flags; - - if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW) - subdev_entity->pfe_cfg0 = ISC_PFE_CFG0_HPOL_LOW; - - if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW) - subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_VPOL_LOW; - - if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING) - subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_PPOL_LOW; - - subdev_entity->asd->match_type = V4L2_ASYNC_MATCH_FWNODE; - subdev_entity->asd->match.fwnode.fwnode = - of_fwnode_handle(rem); - list_add_tail(&subdev_entity->list, &isc->subdev_entities); - } - - of_node_put(epn); - return ret; -} - -/* regmap configuration */ -#define ATMEL_ISC_REG_MAX 0xbfc -static const struct regmap_config isc_regmap_config = { - .reg_bits = 32, - .reg_stride = 4, - .val_bits = 32, - .max_register = ATMEL_ISC_REG_MAX, -}; - -static int atmel_isc_probe(struct platform_device *pdev) -{ - struct device *dev = &pdev->dev; - struct isc_device *isc; - struct resource *res; - void __iomem *io_base; - struct isc_subdev_entity *subdev_entity; - int irq; - int ret; - - isc = devm_kzalloc(dev, sizeof(*isc), GFP_KERNEL); - if (!isc) - return -ENOMEM; - - platform_set_drvdata(pdev, isc); - isc->dev = dev; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - io_base = devm_ioremap_resource(dev, res); - if (IS_ERR(io_base)) - return PTR_ERR(io_base); - - isc->regmap = devm_regmap_init_mmio(dev, io_base, &isc_regmap_config); - if (IS_ERR(isc->regmap)) { - ret = PTR_ERR(isc->regmap); - dev_err(dev, "failed to init register map: %d\n", ret); - return ret; - } - - irq = platform_get_irq(pdev, 0); - if (irq < 0) { - ret = irq; - dev_err(dev, "failed to get irq: %d\n", ret); - return ret; - } - - ret = devm_request_irq(dev, irq, isc_interrupt, 0, - ATMEL_ISC_NAME, isc); - if (ret < 0) { - dev_err(dev, "can't register ISR for IRQ %u (ret=%i)\n", - irq, ret); - return ret; - } - - ret = isc_pipeline_init(isc); - if (ret) - return ret; - - isc->hclock = devm_clk_get(dev, "hclock"); - if (IS_ERR(isc->hclock)) { - ret = PTR_ERR(isc->hclock); - dev_err(dev, "failed to get hclock: %d\n", ret); - return ret; - } - - ret = isc_clk_init(isc); - if (ret) { - dev_err(dev, "failed to init isc clock: %d\n", ret); - goto clean_isc_clk; - } - - isc->ispck = isc->isc_clks[ISC_ISPCK].clk; - - /* ispck should be greater or equal to hclock */ - ret = clk_set_rate(isc->ispck, clk_get_rate(isc->hclock)); - if (ret) { - dev_err(dev, "failed to set ispck rate: %d\n", ret); - goto clean_isc_clk; - } - - ret = v4l2_device_register(dev, &isc->v4l2_dev); - if (ret) { - dev_err(dev, "unable to register v4l2 device.\n"); - goto clean_isc_clk; - } - - ret = isc_parse_dt(dev, isc); - if (ret) { - dev_err(dev, "fail to parse device tree\n"); - goto unregister_v4l2_device; - } - - if (list_empty(&isc->subdev_entities)) { - dev_err(dev, "no subdev found\n"); - ret = -ENODEV; - goto unregister_v4l2_device; - } - - list_for_each_entry(subdev_entity, &isc->subdev_entities, list) { - subdev_entity->notifier.subdevs = &subdev_entity->asd; - subdev_entity->notifier.num_subdevs = 1; - subdev_entity->notifier.bound = isc_async_bound; - subdev_entity->notifier.unbind = isc_async_unbind; - subdev_entity->notifier.complete = isc_async_complete; - - ret = v4l2_async_notifier_register(&isc->v4l2_dev, - &subdev_entity->notifier); - if (ret) { - dev_err(dev, "fail to register async notifier\n"); - goto cleanup_subdev; - } - - if (video_is_registered(&isc->video_dev)) - break; - } - - pm_runtime_enable(dev); - - return 0; - -cleanup_subdev: - isc_subdev_cleanup(isc); - -unregister_v4l2_device: - v4l2_device_unregister(&isc->v4l2_dev); - -clean_isc_clk: - isc_clk_cleanup(isc); - - return ret; -} - -static int atmel_isc_remove(struct platform_device *pdev) -{ - struct isc_device *isc = platform_get_drvdata(pdev); - - pm_runtime_disable(&pdev->dev); - - isc_subdev_cleanup(isc); - - v4l2_device_unregister(&isc->v4l2_dev); - - isc_clk_cleanup(isc); - - return 0; -} - -static int __maybe_unused isc_runtime_suspend(struct device *dev) -{ - struct isc_device *isc = dev_get_drvdata(dev); - - clk_disable_unprepare(isc->ispck); - clk_disable_unprepare(isc->hclock); - - return 0; -} - -static int __maybe_unused isc_runtime_resume(struct device *dev) -{ - struct isc_device *isc = dev_get_drvdata(dev); - int ret; - - ret = clk_prepare_enable(isc->hclock); - if (ret) - return ret; - - return clk_prepare_enable(isc->ispck); -} - -static const struct dev_pm_ops atmel_isc_dev_pm_ops = { - SET_RUNTIME_PM_OPS(isc_runtime_suspend, isc_runtime_resume, NULL) -}; - -static const struct of_device_id atmel_isc_of_match[] = { - { .compatible = "atmel,sama5d2-isc" }, - { } -}; -MODULE_DEVICE_TABLE(of, atmel_isc_of_match); - -static struct platform_driver atmel_isc_driver = { - .probe = atmel_isc_probe, - .remove = atmel_isc_remove, - .driver = { - .name = ATMEL_ISC_NAME, - .pm = &atmel_isc_dev_pm_ops, - .of_match_table = of_match_ptr(atmel_isc_of_match), - }, -}; - -module_platform_driver(atmel_isc_driver); - -MODULE_AUTHOR("Songjun Wu <songjun.wu@microchip.com>"); -MODULE_DESCRIPTION("The V4L2 driver for Atmel-ISC"); -MODULE_LICENSE("GPL v2"); -MODULE_SUPPORTED_DEVICE("video"); |