| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Songjun Wu | 5837 | 52.26% | 6 | 18.75% |
| Eugen Hristev | 4550 | 40.73% | 5 | 15.62% |
| Wenyou Yang | 632 | 5.66% | 5 | 15.62% |
| Steve Longerbeam | 39 | 0.35% | 1 | 3.12% |
| Laurent Pinchart | 26 | 0.23% | 1 | 3.12% |
| Sakari Ailus | 24 | 0.21% | 2 | 6.25% |
| Mauro Carvalho Chehab | 18 | 0.16% | 3 | 9.38% |
| Ken Sloat | 16 | 0.14% | 1 | 3.12% |
| Hans Verkuil | 12 | 0.11% | 1 | 3.12% |
| Wei Yongjun | 5 | 0.04% | 1 | 3.12% |
| SF Markus Elfring | 5 | 0.04% | 2 | 6.25% |
| Arnd Bergmann | 2 | 0.02% | 1 | 3.12% |
| Thomas Gleixner | 2 | 0.02% | 1 | 3.12% |
| Colin Ian King | 1 | 0.01% | 1 | 3.12% |
| Rob Herring | 1 | 0.01% | 1 | 3.12% |
| Total | 11170 | 32 |
// SPDX-License-Identifier: GPL-2.0-only /* * Atmel Image Sensor Controller (ISC) driver * * Copyright (C) 2016 Atmel * * Author: Songjun Wu <songjun.wu@microchip.com> * * 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; spinlock_t lock; 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; u32 pfe_cfg0; struct list_head list; }; /* * struct isc_format - ISC media bus format information This structure represents the interface between the ISC and the sensor. It's the input format received by the ISC. * @fourcc: Fourcc code for this format * @mbus_code: V4L2 media bus format code. * @cfa_baycfg: If this format is RAW BAYER, indicate the type of bayer. this is either BGBG, RGRG, etc. * @pfe_cfg0_bps: Number of hardware data lines connected to the ISC */ struct isc_format { u32 fourcc; u32 mbus_code; u32 cfa_baycfg; bool sd_support; u32 pfe_cfg0_bps; }; /* Pipeline bitmap */ #define WB_ENABLE BIT(0) #define CFA_ENABLE BIT(1) #define CC_ENABLE BIT(2) #define GAM_ENABLE BIT(3) #define GAM_BENABLE BIT(4) #define GAM_GENABLE BIT(5) #define GAM_RENABLE BIT(6) #define CSC_ENABLE BIT(7) #define CBC_ENABLE BIT(8) #define SUB422_ENABLE BIT(9) #define SUB420_ENABLE BIT(10) #define GAM_ENABLES (GAM_RENABLE | GAM_GENABLE | GAM_BENABLE | GAM_ENABLE) /* * struct fmt_config - ISC format configuration and internal pipeline This structure represents the internal configuration of the ISC. It also holds the format that ISC will present to v4l2. * @sd_format: Pointer to an isc_format struct that holds the sensor configuration. * @fourcc: Fourcc code for this format. * @bpp: Bytes per pixel in the current format. * @rlp_cfg_mode: Configuration of the RLP (rounding, limiting packaging) * @dcfg_imode: Configuration of the input of the DMA module * @dctrl_dview: Configuration of the output of the DMA module * @bits_pipeline: Configuration of the pipeline, which modules are enabled */ struct fmt_config { struct isc_format *sd_format; u32 fourcc; u8 bpp; u32 rlp_cfg_mode; u32 dcfg_imode; u32 dctrl_dview; u32 bits_pipeline; }; #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; struct fmt_config config; struct fmt_config try_config; 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; }; /* This is a list of the formats that the ISC can *output* */ static struct isc_format controller_formats[] = { { .fourcc = V4L2_PIX_FMT_ARGB444, }, { .fourcc = V4L2_PIX_FMT_ARGB555, }, { .fourcc = V4L2_PIX_FMT_RGB565, }, { .fourcc = V4L2_PIX_FMT_ABGR32, }, { .fourcc = V4L2_PIX_FMT_XBGR32, }, { .fourcc = V4L2_PIX_FMT_YUV420, }, { .fourcc = V4L2_PIX_FMT_YUYV, }, { .fourcc = V4L2_PIX_FMT_YUV422P, }, { .fourcc = V4L2_PIX_FMT_GREY, }, }; /* This is a list of formats that the ISC can receive as *input* */ static struct isc_format formats_list[] = { { .fourcc = V4L2_PIX_FMT_SBGGR8, .mbus_code = MEDIA_BUS_FMT_SBGGR8_1X8, .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, .cfa_baycfg = ISC_BAY_CFG_BGBG, }, { .fourcc = V4L2_PIX_FMT_SGBRG8, .mbus_code = MEDIA_BUS_FMT_SGBRG8_1X8, .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, .cfa_baycfg = ISC_BAY_CFG_GBGB, }, { .fourcc = V4L2_PIX_FMT_SGRBG8, .mbus_code = MEDIA_BUS_FMT_SGRBG8_1X8, .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, .cfa_baycfg = ISC_BAY_CFG_GRGR, }, { .fourcc = V4L2_PIX_FMT_SRGGB8, .mbus_code = MEDIA_BUS_FMT_SRGGB8_1X8, .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, .cfa_baycfg = ISC_BAY_CFG_RGRG, }, { .fourcc = V4L2_PIX_FMT_SBGGR10, .mbus_code = MEDIA_BUS_FMT_SBGGR10_1X10, .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN, .cfa_baycfg = ISC_BAY_CFG_RGRG, }, { .fourcc = V4L2_PIX_FMT_SGBRG10, .mbus_code = MEDIA_BUS_FMT_SGBRG10_1X10, .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN, .cfa_baycfg = ISC_BAY_CFG_GBGB, }, { .fourcc = V4L2_PIX_FMT_SGRBG10, .mbus_code = MEDIA_BUS_FMT_SGRBG10_1X10, .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN, .cfa_baycfg = ISC_BAY_CFG_GRGR, }, { .fourcc = V4L2_PIX_FMT_SRGGB10, .mbus_code = MEDIA_BUS_FMT_SRGGB10_1X10, .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN, .cfa_baycfg = ISC_BAY_CFG_RGRG, }, { .fourcc = V4L2_PIX_FMT_SBGGR12, .mbus_code = MEDIA_BUS_FMT_SBGGR12_1X12, .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE, .cfa_baycfg = ISC_BAY_CFG_BGBG, }, { .fourcc = V4L2_PIX_FMT_SGBRG12, .mbus_code = MEDIA_BUS_FMT_SGBRG12_1X12, .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE, .cfa_baycfg = ISC_BAY_CFG_GBGB, }, { .fourcc = V4L2_PIX_FMT_SGRBG12, .mbus_code = MEDIA_BUS_FMT_SGRBG12_1X12, .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE, .cfa_baycfg = ISC_BAY_CFG_GRGR, }, { .fourcc = V4L2_PIX_FMT_SRGGB12, .mbus_code = MEDIA_BUS_FMT_SRGGB12_1X12, .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE, .cfa_baycfg = ISC_BAY_CFG_RGRG, }, { .fourcc = V4L2_PIX_FMT_GREY, .mbus_code = MEDIA_BUS_FMT_Y8_1X8, .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, }, { .fourcc = V4L2_PIX_FMT_YUYV, .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, }, { .fourcc = V4L2_PIX_FMT_RGB565, .mbus_code = MEDIA_BUS_FMT_RGB565_2X8_LE, .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT, }, }; #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 }, }; #define ISC_IS_FORMAT_RAW(mbus_code) \ (((mbus_code) & 0xf000) == 0x3000) static unsigned int debug; module_param(debug, int, 0644); MODULE_PARM_DESC(debug, "debug level (0-2)"); 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_wait_clk_stable(struct clk_hw *hw) { struct isc_clk *isc_clk = to_isc_clk(hw); struct regmap *regmap = isc_clk->regmap; unsigned long timeout = jiffies + usecs_to_jiffies(1000); unsigned int status; while (time_before(jiffies, timeout)) { regmap_read(regmap, ISC_CLKSR, &status); if (!(status & ISC_CLKSR_SIP)) return 0; usleep_range(10, 250); } return -ETIMEDOUT; } static int isc_clk_prepare(struct clk_hw *hw) { struct isc_clk *isc_clk = to_isc_clk(hw); if (isc_clk->id == ISC_ISPCK) pm_runtime_get_sync(isc_clk->dev); return isc_wait_clk_stable(hw); } static void isc_clk_unprepare(struct clk_hw *hw) { struct isc_clk *isc_clk = to_isc_clk(hw); isc_wait_clk_stable(hw); if (isc_clk->id == ISC_ISPCK) pm_runtime_put_sync(isc_clk->dev); } 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; unsigned long flags; unsigned int status; dev_dbg(isc_clk->dev, "ISC CLK: %s, div = %d, parent id = %d\n", __func__, isc_clk->div, isc_clk->parent_id); spin_lock_irqsave(&isc_clk->lock, flags); 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)); spin_unlock_irqrestore(&isc_clk->lock, flags); regmap_read(regmap, ISC_CLKSR, &status); if (status & ISC_CLK(id)) return 0; else return -EINVAL; } static void isc_clk_disable(struct clk_hw *hw) { struct isc_clk *isc_clk = to_isc_clk(hw); u32 id = isc_clk->id; unsigned long flags; spin_lock_irqsave(&isc_clk->lock, flags); regmap_write(isc_clk->regmap, ISC_CLKDIS, ISC_CLK(id)); spin_unlock_irqrestore(&isc_clk->lock, flags); } static int isc_clk_is_enabled(struct clk_hw *hw) { struct isc_clk *isc_clk = to_isc_clk(hw); u32 status; if (isc_clk->id == ISC_ISPCK) pm_runtime_get_sync(isc_clk->dev); regmap_read(isc_clk->regmap, ISC_CLKSR, &status); if (isc_clk->id == ISC_ISPCK) pm_runtime_put_sync(isc_clk->dev); 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 = { .prepare = isc_clk_prepare, .unprepare = isc_clk_unprepare, .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; spin_lock_init(&isc_clk->lock); 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 void isc_start_dma(struct isc_device *isc) { struct regmap *regmap = isc->regmap; u32 sizeimage = isc->fmt.fmt.pix.sizeimage; u32 dctrl_dview; dma_addr_t addr0; u32 h, w; h = isc->fmt.fmt.pix.height; w = isc->fmt.fmt.pix.width; /* * In case the sensor is not RAW, it will output a pixel (12-16 bits) * with two samples on the ISC Data bus (which is 8-12) * ISC will count each sample, so, we need to multiply these values * by two, to get the real number of samples for the required pixels. */ if (!ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code)) { h <<= 1; w <<= 1; } /* * We limit the column/row count that the ISC will output according * to the configured resolution that we want. * This will avoid the situation where the sensor is misconfigured, * sending more data, and the ISC will just take it and DMA to memory, * causing corruption. */ regmap_write(regmap, ISC_PFE_CFG1, (ISC_PFE_CFG1_COLMIN(0) & ISC_PFE_CFG1_COLMIN_MASK) | (ISC_PFE_CFG1_COLMAX(w - 1) & ISC_PFE_CFG1_COLMAX_MASK)); regmap_write(regmap, ISC_PFE_CFG2, (ISC_PFE_CFG2_ROWMIN(0) & ISC_PFE_CFG2_ROWMIN_MASK) | (ISC_PFE_CFG2_ROWMAX(h - 1) & ISC_PFE_CFG2_ROWMAX_MASK)); regmap_update_bits(regmap, ISC_PFE_CFG0, ISC_PFE_CFG0_COLEN | ISC_PFE_CFG0_ROWEN, ISC_PFE_CFG0_COLEN | ISC_PFE_CFG0_ROWEN); addr0 = vb2_dma_contig_plane_dma_addr(&isc->cur_frm->vb.vb2_buf, 0); regmap_write(regmap, ISC_DAD0, addr0); switch (isc->config.fourcc) { 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; } dctrl_dview = isc->config.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->config.sd_format->cfa_baycfg; 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 profile\n"); return -ETIMEDOUT; } return 0; } static void isc_set_histogram(struct isc_device *isc, bool enable) { struct regmap *regmap = isc->regmap; struct isc_ctrls *ctrls = &isc->ctrls; if (enable) { regmap_write(regmap, ISC_HIS_CFG, ISC_HIS_CFG_MODE_R | (isc->config.sd_format->cfa_baycfg << 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 { regmap_write(regmap, ISC_INTDIS, ISC_INT_HISDONE); regmap_write(regmap, ISC_HIS_CTRL, ISC_HIS_CTRL_DIS); ctrls->hist_stat = HIST_DISABLED; } } static int isc_configure(struct isc_device *isc) { struct regmap *regmap = isc->regmap; u32 pfe_cfg0, rlp_mode, dcfg, mask, pipeline; struct isc_subdev_entity *subdev = isc->current_subdev; pfe_cfg0 = isc->config.sd_format->pfe_cfg0_bps; rlp_mode = isc->config.rlp_cfg_mode; pipeline = isc->config.bits_pipeline; dcfg = isc->config.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 | ISC_PFE_CFG0_CCIR_CRC | ISC_PFE_CFG0_CCIR656; 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); /* * The current implemented histogram is available for RAW R, B, GB * channels. We need to check if sensor is outputting RAW BAYER */ if (isc->ctrls.awb && ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code)) isc_set_histogram(isc, true); else isc_set_histogram(isc, false); /* 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 %d\n", ret); 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 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 const 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); strscpy(cap->driver, ATMEL_ISC_NAME, sizeof(cap->driver)); strscpy(cap->card, "Atmel Image Sensor Controller", sizeof(cap->card)); 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) { u32 index = f->index; u32 i, supported_index; if (index < ARRAY_SIZE(controller_formats)) { f->pixelformat = controller_formats[index].fourcc; return 0; } index -= ARRAY_SIZE(controller_formats); i = 0; supported_index = 0; for (i = 0; i < ARRAY_SIZE(formats_list); i++) { if (!ISC_IS_FORMAT_RAW(formats_list[i].mbus_code) || !formats_list[i].sd_support) continue; if (supported_index == index) { f->pixelformat = formats_list[i].fourcc; return 0; } supported_index++; } return -EINVAL; } 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; } /* * Checks the current configured format, if ISC can output it, * considering which type of format the ISC receives from the sensor */ static int isc_try_validate_formats(struct isc_device *isc) { int ret; bool bayer = false, yuv = false, rgb = false, grey = false; /* all formats supported by the RLP module are OK */ switch (isc->try_config.fourcc) { case V4L2_PIX_FMT_SBGGR8: case V4L2_PIX_FMT_SGBRG8: case V4L2_PIX_FMT_SGRBG8: case V4L2_PIX_FMT_SRGGB8: 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: ret = 0; bayer = true; break; case V4L2_PIX_FMT_YUV420: case V4L2_PIX_FMT_YUV422P: case V4L2_PIX_FMT_YUYV: ret = 0; yuv = true; break; case V4L2_PIX_FMT_RGB565: case V4L2_PIX_FMT_ABGR32: case V4L2_PIX_FMT_XBGR32: case V4L2_PIX_FMT_ARGB444: case V4L2_PIX_FMT_ARGB555: ret = 0; rgb = true; break; case V4L2_PIX_FMT_GREY: ret = 0; grey = true; break; default: /* any other different formats are not supported */ ret = -EINVAL; } /* we cannot output RAW/Grey if we do not receive RAW */ if ((bayer || grey) && !ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) return -EINVAL; v4l2_dbg(1, debug, &isc->v4l2_dev, "Format validation, requested rgb=%u, yuv=%u, grey=%u, bayer=%u\n", rgb, yuv, grey, bayer); return ret; } /* * Configures the RLP and DMA modules, depending on the output format * configured for the ISC. * If direct_dump == true, just dump raw data 8 bits. */ static int isc_try_configure_rlp_dma(struct isc_device *isc, bool direct_dump) { if (direct_dump) { isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT8; isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED8; isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; isc->try_config.bpp = 16; return 0; } switch (isc->try_config.fourcc) { case V4L2_PIX_FMT_SBGGR8: case V4L2_PIX_FMT_SGBRG8: case V4L2_PIX_FMT_SGRBG8: case V4L2_PIX_FMT_SRGGB8: isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT8; isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED8; isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; isc->try_config.bpp = 8; break; case V4L2_PIX_FMT_SBGGR10: case V4L2_PIX_FMT_SGBRG10: case V4L2_PIX_FMT_SGRBG10: case V4L2_PIX_FMT_SRGGB10: isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT10; isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16; isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; isc->try_config.bpp = 16; break; case V4L2_PIX_FMT_SBGGR12: case V4L2_PIX_FMT_SGBRG12: case V4L2_PIX_FMT_SGRBG12: case V4L2_PIX_FMT_SRGGB12: isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT12; isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16; isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; isc->try_config.bpp = 16; break; case V4L2_PIX_FMT_RGB565: isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_RGB565; isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16; isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; isc->try_config.bpp = 16; break; case V4L2_PIX_FMT_ARGB444: isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB444; isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16; isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; isc->try_config.bpp = 16; break; case V4L2_PIX_FMT_ARGB555: isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB555; isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16; isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; isc->try_config.bpp = 16; break; case V4L2_PIX_FMT_ABGR32: case V4L2_PIX_FMT_XBGR32: isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB32; isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED32; isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; isc->try_config.bpp = 32; break; case V4L2_PIX_FMT_YUV420: isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YYCC; isc->try_config.dcfg_imode = ISC_DCFG_IMODE_YC420P; isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PLANAR; isc->try_config.bpp = 12; break; case V4L2_PIX_FMT_YUV422P: isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YYCC; isc->try_config.dcfg_imode = ISC_DCFG_IMODE_YC422P; isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PLANAR; isc->try_config.bpp = 16; break; case V4L2_PIX_FMT_YUYV: isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YYCC; isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED32; isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; isc->try_config.bpp = 16; break; case V4L2_PIX_FMT_GREY: isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DATY8; isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED8; isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED; isc->try_config.bpp = 8; break; default: return -EINVAL; } return 0; } /* * Configuring pipeline modules, depending on which format the ISC outputs * and considering which format it has as input from the sensor. */ static int isc_try_configure_pipeline(struct isc_device *isc) { switch (isc->try_config.fourcc) { case V4L2_PIX_FMT_RGB565: case V4L2_PIX_FMT_ARGB555: case V4L2_PIX_FMT_ARGB444: case V4L2_PIX_FMT_ABGR32: case V4L2_PIX_FMT_XBGR32: /* if sensor format is RAW, we convert inside ISC */ if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) { isc->try_config.bits_pipeline = CFA_ENABLE | WB_ENABLE | GAM_ENABLES; } else { isc->try_config.bits_pipeline = 0x0; } break; case V4L2_PIX_FMT_YUV420: /* if sensor format is RAW, we convert inside ISC */ if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) { isc->try_config.bits_pipeline = CFA_ENABLE | CSC_ENABLE | WB_ENABLE | GAM_ENABLES | SUB420_ENABLE | SUB422_ENABLE | CBC_ENABLE; } else { isc->try_config.bits_pipeline = 0x0; } break; case V4L2_PIX_FMT_YUV422P: /* if sensor format is RAW, we convert inside ISC */ if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) { isc->try_config.bits_pipeline = CFA_ENABLE | CSC_ENABLE | WB_ENABLE | GAM_ENABLES | SUB422_ENABLE | CBC_ENABLE; } else { isc->try_config.bits_pipeline = 0x0; } break; case V4L2_PIX_FMT_YUYV: /* if sensor format is RAW, we convert inside ISC */ if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) { isc->try_config.bits_pipeline = CFA_ENABLE | CSC_ENABLE | WB_ENABLE | GAM_ENABLES | SUB422_ENABLE | CBC_ENABLE; } else { isc->try_config.bits_pipeline = 0x0; } break; case V4L2_PIX_FMT_GREY: if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) { /* if sensor format is RAW, we convert inside ISC */ isc->try_config.bits_pipeline = CFA_ENABLE | CSC_ENABLE | WB_ENABLE | GAM_ENABLES | CBC_ENABLE; } else { isc->try_config.bits_pipeline = 0x0; } break; default: isc->try_config.bits_pipeline = 0x0; } return 0; } static int isc_try_fmt(struct isc_device *isc, struct v4l2_format *f, u32 *code) { int i; struct isc_format *sd_fmt = NULL, *direct_fmt = NULL; struct v4l2_pix_format *pixfmt = &f->fmt.pix; struct v4l2_subdev_pad_config pad_cfg; struct v4l2_subdev_format format = { .which = V4L2_SUBDEV_FORMAT_TRY, }; u32 mbus_code; int ret; bool rlp_dma_direct_dump = false; if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) return -EINVAL; /* Step 1: find a RAW format that is supported */ for (i = 0; i < isc->num_user_formats; i++) { if (ISC_IS_FORMAT_RAW(isc->user_formats[i]->mbus_code)) { sd_fmt = isc->user_formats[i]; break; } } /* Step 2: We can continue with this RAW format, or we can look * for better: maybe sensor supports directly what we need. */ direct_fmt = find_format_by_fourcc(isc, pixfmt->pixelformat); /* Step 3: We have both. We decide given the module parameter which * one to use. */ if (direct_fmt && sd_fmt && sensor_preferred) sd_fmt = direct_fmt; /* Step 4: we do not have RAW but we have a direct format. Use it. */ if (direct_fmt && !sd_fmt) sd_fmt = direct_fmt; /* Step 5: if we are using a direct format, we need to package * everything as 8 bit data and just dump it */ if (sd_fmt == direct_fmt) rlp_dma_direct_dump = true; /* Step 6: We have no format. This can happen if the userspace * requests some weird/invalid format. * In this case, default to whatever we have */ if (!sd_fmt && !direct_fmt) { sd_fmt = isc->user_formats[isc->num_user_formats - 1]; v4l2_dbg(1, debug, &isc->v4l2_dev, "Sensor not supporting %.4s, using %.4s\n", (char *)&pixfmt->pixelformat, (char *)&sd_fmt->fourcc); } if (!sd_fmt) { ret = -EINVAL; goto isc_try_fmt_err; } /* Step 7: Print out what we decided for debugging */ v4l2_dbg(1, debug, &isc->v4l2_dev, "Preferring to have sensor using format %.4s\n", (char *)&sd_fmt->fourcc); /* Step 8: at this moment we decided which format the subdev will use */ isc->try_config.sd_format = sd_fmt; /* 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; /* * The mbus format is the one the subdev outputs. * The pixels will be transferred in this format Sensor -> ISC */ mbus_code = sd_fmt->mbus_code; /* * Validate formats. If the required format is not OK, default to raw. */ isc->try_config.fourcc = pixfmt->pixelformat; if (isc_try_validate_formats(isc)) { pixfmt->pixelformat = isc->try_config.fourcc = sd_fmt->fourcc; /* Re-try to validate the new format */ ret = isc_try_validate_formats(isc); if (ret) goto isc_try_fmt_err; } ret = isc_try_configure_rlp_dma(isc, rlp_dma_direct_dump); if (ret) goto isc_try_fmt_err; ret = isc_try_configure_pipeline(isc); if (ret) goto isc_try_fmt_err; v4l2_fill_mbus_format(&format.format, pixfmt, mbus_code); ret = v4l2_subdev_call(isc->current_subdev->sd, pad, set_fmt, &pad_cfg, &format); if (ret < 0) goto isc_try_fmt_err; v4l2_fill_pix_format(pixfmt, &format.format); pixfmt->field = V4L2_FIELD_NONE; pixfmt->bytesperline = (pixfmt->width * isc->try_config.bpp) >> 3; pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height; if (code) *code = mbus_code; return 0; isc_try_fmt_err: v4l2_err(&isc->v4l2_dev, "Could not find any possible format for a working pipeline\n"); memset(&isc->try_config, 0, sizeof(isc->try_config)); return ret; } static int isc_set_fmt(struct isc_device *isc, struct v4l2_format *f) { struct v4l2_subdev_format format = { .which = V4L2_SUBDEV_FORMAT_ACTIVE, }; u32 mbus_code = 0; int ret; ret = isc_try_fmt(isc, f, &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; /* make the try configuration active */ isc->config = isc->try_config; v4l2_dbg(1, debug, &isc->v4l2_dev, "New ISC configuration in place\n"); 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); } 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; strscpy(inp->name, "Camera", sizeof(inp->name)); 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); return v4l2_g_parm_cap(video_devdata(file), isc->current_subdev->sd, a); } static int isc_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) { struct isc_device *isc = video_drvdata(file); return v4l2_s_parm_cap(video_devdata(file), isc->current_subdev->sd, a); } static int isc_enum_framesizes(struct file *file, void *fh, struct v4l2_frmsizeenum *fsize) { struct isc_device *isc = video_drvdata(file); struct v4l2_subdev_frame_size_enum fse = { .index = fsize->index, .which = V4L2_SUBDEV_FORMAT_ACTIVE, }; int ret = -EINVAL; int i; for (i = 0; i < isc->num_user_formats; i++) if (isc->user_formats[i]->fourcc == fsize->pixel_format) ret = 0; for (i = 0; i < ARRAY_SIZE(controller_formats); i++) if (controller_formats[i].fourcc == fsize->pixel_format) ret = 0; if (ret) return ret; ret = v4l2_subdev_call(isc->current_subdev->sd, pad, enum_frame_size, NULL, &fse); if (ret) return ret; fse.code = isc->config.sd_format->mbus_code; 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); struct v4l2_subdev_frame_interval_enum fie = { .index = fival->index, .width = fival->width, .height = fival->height, .which = V4L2_SUBDEV_FORMAT_ACTIVE, }; int ret = -EINVAL; int i; for (i = 0; i < isc->num_user_formats; i++) if (isc->user_formats[i]->fourcc == fival->pixel_format) ret = 0; for (i = 0; i < ARRAY_SIZE(controller_formats); i++) if (controller_formats[i].fourcc == fival->pixel_format) ret = 0; if (ret) return ret; ret = v4l2_subdev_call(isc->current_subdev->sd, pad, enum_frame_interval, NULL, &fie); if (ret) return ret; fie.code = isc->config.sd_format->mbus_code; 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->config.sd_format->cfa_baycfg << 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); v4l2_ctrl_handler_free(&isc->ctrls.handler); } static struct isc_format *find_format_by_code(unsigned int code, int *index) { struct isc_format *fmt = &formats_list[0]; unsigned int i; for (i = 0; i < ARRAY_SIZE(formats_list); 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; u32 list_size = ARRAY_SIZE(formats_list); struct v4l2_subdev_mbus_code_enum mbus_code = { .which = V4L2_SUBDEV_FORMAT_ACTIVE, }; num_fmts = 0; 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) { v4l2_warn(&isc->v4l2_dev, "Mbus code %x not supported\n", mbus_code.code); continue; } fmt->sd_support = true; num_fmts++; } if (!num_fmts) return -ENXIO; isc->num_user_formats = num_fmts; isc->user_formats = devm_kcalloc(isc->dev, num_fmts, sizeof(*isc->user_formats), GFP_KERNEL); if (!isc->user_formats) return -ENOMEM; fmt = &formats_list[0]; for (i = 0, j = 0; i < list_size; i++) { if (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); if (ret) return ret; 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 video_device *vdev = &isc->video_dev; struct vb2_queue *q = &isc->vb2_vidq; int ret; INIT_WORK(&isc->awb_work, isc_awb_work); 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); 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); 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; } /* Register video device */ strscpy(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 const struct v4l2_async_notifier_operations isc_async_ops = { .bound = isc_async_bound, .unbind = isc_async_unbind, .complete = isc_async_complete, }; 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); v4l2_async_notifier_cleanup(&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 isc_subdev_entity *subdev_entity; unsigned int flags; int ret; INIT_LIST_HEAD(&isc->subdev_entities); while (1) { struct v4l2_fwnode_endpoint v4l2_epn = { .bus_type = 0 }; epn = of_graph_get_next_endpoint(np, epn); if (!epn) return 0; rem = of_graph_get_remote_port_parent(epn); if (!rem) { dev_notice(dev, "Remote device at %pOF not found\n", 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) { of_node_put(rem); ret = -ENOMEM; break; } /* asd will be freed by the subsystem once it's added to the * notifier list */ subdev_entity->asd = kzalloc(sizeof(*subdev_entity->asd), GFP_KERNEL); if (!subdev_entity->asd) { 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; if (v4l2_epn.bus_type == V4L2_MBUS_BT656) subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_CCIR_CRC | ISC_PFE_CFG0_CCIR656; subdev_entity->asd->match_type = V4L2_ASYNC_MATCH_FWNODE; subdev_entity->asd->match.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 = clk_prepare_enable(isc->hclock); if (ret) { dev_err(dev, "failed to enable 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 unprepare_hclk; } isc->ispck = isc->isc_clks[ISC_ISPCK].clk; ret = clk_prepare_enable(isc->ispck); if (ret) { dev_err(dev, "failed to enable ispck: %d\n", ret); goto unprepare_hclk; } /* 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 unprepare_clk; } ret = v4l2_device_register(dev, &isc->v4l2_dev); if (ret) { dev_err(dev, "unable to register v4l2 device.\n"); goto unprepare_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) { v4l2_async_notifier_init(&subdev_entity->notifier); ret = v4l2_async_notifier_add_subdev(&subdev_entity->notifier, subdev_entity->asd); if (ret) { fwnode_handle_put(subdev_entity->asd->match.fwnode); kfree(subdev_entity->asd); goto cleanup_subdev; } subdev_entity->notifier.ops = &isc_async_ops; 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_set_active(dev); pm_runtime_enable(dev); pm_request_idle(dev); return 0; cleanup_subdev: isc_subdev_cleanup(isc); unregister_v4l2_device: v4l2_device_unregister(&isc->v4l2_dev); unprepare_clk: clk_disable_unprepare(isc->ispck); unprepare_hclk: clk_disable_unprepare(isc->hclock); 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); clk_disable_unprepare(isc->ispck); clk_disable_unprepare(isc->hclock); 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");
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