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linux/drivers/media/platform/atmel/atmel-isc.c

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/*
* 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/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-of.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, &current_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_of_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_of_parse_endpoint(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_OF;
subdev_entity->asd->match.of.node = 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");
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