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OpenCloudOS-Kernel/drivers/media/platform/aspeed-video.c

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// SPDX-License-Identifier: GPL-2.0-or-later
// Copyright 2020 IBM Corp.
// Copyright (c) 2019-2020 Intel Corporation
#include <linux/atomic.h>
#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/jiffies.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_reserved_mem.h>
#include <linux/platform_device.h>
#include <linux/sched.h>
#include <linux/spinlock.h>
#include <linux/string.h>
#include <linux/v4l2-controls.h>
#include <linux/videodev2.h>
#include <linux/wait.h>
#include <linux/workqueue.h>
#include <linux/debugfs.h>
#include <linux/ktime.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-device.h>
#include <media/v4l2-dv-timings.h>
#include <media/v4l2-event.h>
#include <media/v4l2-ioctl.h>
#include <media/videobuf2-dma-contig.h>
#define DEVICE_NAME "aspeed-video"
#define ASPEED_VIDEO_JPEG_NUM_QUALITIES 12
#define ASPEED_VIDEO_JPEG_HEADER_SIZE 10
#define ASPEED_VIDEO_JPEG_QUANT_SIZE 116
#define ASPEED_VIDEO_JPEG_DCT_SIZE 34
#define MAX_FRAME_RATE 60
#define MAX_HEIGHT 1200
#define MAX_WIDTH 1920
#define MIN_HEIGHT 480
#define MIN_WIDTH 640
#define NUM_POLARITY_CHECKS 10
#define INVALID_RESOLUTION_RETRIES 2
#define INVALID_RESOLUTION_DELAY msecs_to_jiffies(250)
#define RESOLUTION_CHANGE_DELAY msecs_to_jiffies(500)
#define MODE_DETECT_TIMEOUT msecs_to_jiffies(500)
#define STOP_TIMEOUT msecs_to_jiffies(1000)
#define DIRECT_FETCH_THRESHOLD 0x0c0000 /* 1024 * 768 */
#define VE_MAX_SRC_BUFFER_SIZE 0x8ca000 /* 1920 * 1200, 32bpp */
#define VE_JPEG_HEADER_SIZE 0x006000 /* 512 * 12 * 4 */
#define VE_PROTECTION_KEY 0x000
#define VE_PROTECTION_KEY_UNLOCK 0x1a038aa8
#define VE_SEQ_CTRL 0x004
#define VE_SEQ_CTRL_TRIG_MODE_DET BIT(0)
#define VE_SEQ_CTRL_TRIG_CAPTURE BIT(1)
#define VE_SEQ_CTRL_FORCE_IDLE BIT(2)
#define VE_SEQ_CTRL_MULT_FRAME BIT(3)
#define VE_SEQ_CTRL_TRIG_COMP BIT(4)
#define VE_SEQ_CTRL_AUTO_COMP BIT(5)
#define VE_SEQ_CTRL_EN_WATCHDOG BIT(7)
#define VE_SEQ_CTRL_YUV420 BIT(10)
#define VE_SEQ_CTRL_COMP_FMT GENMASK(11, 10)
#define VE_SEQ_CTRL_HALT BIT(12)
#define VE_SEQ_CTRL_EN_WATCHDOG_COMP BIT(14)
#define VE_SEQ_CTRL_TRIG_JPG BIT(15)
#define VE_SEQ_CTRL_CAP_BUSY BIT(16)
#define VE_SEQ_CTRL_COMP_BUSY BIT(18)
#define AST2500_VE_SEQ_CTRL_JPEG_MODE BIT(13)
#define AST2400_VE_SEQ_CTRL_JPEG_MODE BIT(8)
#define VE_CTRL 0x008
#define VE_CTRL_HSYNC_POL BIT(0)
#define VE_CTRL_VSYNC_POL BIT(1)
#define VE_CTRL_SOURCE BIT(2)
#define VE_CTRL_INT_DE BIT(4)
#define VE_CTRL_DIRECT_FETCH BIT(5)
#define VE_CTRL_YUV BIT(6)
#define VE_CTRL_RGB BIT(7)
#define VE_CTRL_CAPTURE_FMT GENMASK(7, 6)
#define VE_CTRL_AUTO_OR_CURSOR BIT(8)
#define VE_CTRL_CLK_INVERSE BIT(11)
#define VE_CTRL_CLK_DELAY GENMASK(11, 9)
#define VE_CTRL_INTERLACE BIT(14)
#define VE_CTRL_HSYNC_POL_CTRL BIT(15)
#define VE_CTRL_FRC GENMASK(23, 16)
#define VE_TGS_0 0x00c
#define VE_TGS_1 0x010
#define VE_TGS_FIRST GENMASK(28, 16)
#define VE_TGS_LAST GENMASK(12, 0)
#define VE_SCALING_FACTOR 0x014
#define VE_SCALING_FILTER0 0x018
#define VE_SCALING_FILTER1 0x01c
#define VE_SCALING_FILTER2 0x020
#define VE_SCALING_FILTER3 0x024
#define VE_CAP_WINDOW 0x030
#define VE_COMP_WINDOW 0x034
#define VE_COMP_PROC_OFFSET 0x038
#define VE_COMP_OFFSET 0x03c
#define VE_JPEG_ADDR 0x040
#define VE_SRC0_ADDR 0x044
#define VE_SRC_SCANLINE_OFFSET 0x048
#define VE_SRC1_ADDR 0x04c
#define VE_COMP_ADDR 0x054
#define VE_STREAM_BUF_SIZE 0x058
#define VE_STREAM_BUF_SIZE_N_PACKETS GENMASK(5, 3)
#define VE_STREAM_BUF_SIZE_P_SIZE GENMASK(2, 0)
#define VE_COMP_CTRL 0x060
#define VE_COMP_CTRL_VQ_DCT_ONLY BIT(0)
#define VE_COMP_CTRL_VQ_4COLOR BIT(1)
#define VE_COMP_CTRL_QUANTIZE BIT(2)
#define VE_COMP_CTRL_EN_BQ BIT(4)
#define VE_COMP_CTRL_EN_CRYPTO BIT(5)
#define VE_COMP_CTRL_DCT_CHR GENMASK(10, 6)
#define VE_COMP_CTRL_DCT_LUM GENMASK(15, 11)
#define VE_COMP_CTRL_EN_HQ BIT(16)
#define VE_COMP_CTRL_RSVD BIT(19)
#define VE_COMP_CTRL_ENCODE GENMASK(21, 20)
#define VE_COMP_CTRL_HQ_DCT_CHR GENMASK(26, 22)
#define VE_COMP_CTRL_HQ_DCT_LUM GENMASK(31, 27)
#define AST2400_VE_COMP_SIZE_READ_BACK 0x078
#define AST2600_VE_COMP_SIZE_READ_BACK 0x084
#define VE_SRC_LR_EDGE_DET 0x090
#define VE_SRC_LR_EDGE_DET_LEFT GENMASK(11, 0)
#define VE_SRC_LR_EDGE_DET_NO_V BIT(12)
#define VE_SRC_LR_EDGE_DET_NO_H BIT(13)
#define VE_SRC_LR_EDGE_DET_NO_DISP BIT(14)
#define VE_SRC_LR_EDGE_DET_NO_CLK BIT(15)
#define VE_SRC_LR_EDGE_DET_RT_SHF 16
#define VE_SRC_LR_EDGE_DET_RT GENMASK(27, VE_SRC_LR_EDGE_DET_RT_SHF)
#define VE_SRC_LR_EDGE_DET_INTERLACE BIT(31)
#define VE_SRC_TB_EDGE_DET 0x094
#define VE_SRC_TB_EDGE_DET_TOP GENMASK(12, 0)
#define VE_SRC_TB_EDGE_DET_BOT_SHF 16
#define VE_SRC_TB_EDGE_DET_BOT GENMASK(28, VE_SRC_TB_EDGE_DET_BOT_SHF)
#define VE_MODE_DETECT_STATUS 0x098
#define VE_MODE_DETECT_H_PIXELS GENMASK(11, 0)
#define VE_MODE_DETECT_V_LINES_SHF 16
#define VE_MODE_DETECT_V_LINES GENMASK(27, VE_MODE_DETECT_V_LINES_SHF)
#define VE_MODE_DETECT_STATUS_VSYNC BIT(28)
#define VE_MODE_DETECT_STATUS_HSYNC BIT(29)
#define VE_SYNC_STATUS 0x09c
#define VE_SYNC_STATUS_HSYNC GENMASK(11, 0)
#define VE_SYNC_STATUS_VSYNC_SHF 16
#define VE_SYNC_STATUS_VSYNC GENMASK(27, VE_SYNC_STATUS_VSYNC_SHF)
#define VE_INTERRUPT_CTRL 0x304
#define VE_INTERRUPT_STATUS 0x308
#define VE_INTERRUPT_MODE_DETECT_WD BIT(0)
#define VE_INTERRUPT_CAPTURE_COMPLETE BIT(1)
#define VE_INTERRUPT_COMP_READY BIT(2)
#define VE_INTERRUPT_COMP_COMPLETE BIT(3)
#define VE_INTERRUPT_MODE_DETECT BIT(4)
#define VE_INTERRUPT_FRAME_COMPLETE BIT(5)
#define VE_INTERRUPT_DECODE_ERR BIT(6)
#define VE_INTERRUPT_HALT_READY BIT(8)
#define VE_INTERRUPT_HANG_WD BIT(9)
#define VE_INTERRUPT_STREAM_DESC BIT(10)
#define VE_INTERRUPT_VSYNC_DESC BIT(11)
#define VE_MODE_DETECT 0x30c
#define VE_MEM_RESTRICT_START 0x310
#define VE_MEM_RESTRICT_END 0x314
enum {
VIDEO_MODE_DETECT_DONE,
VIDEO_RES_CHANGE,
VIDEO_RES_DETECT,
VIDEO_STREAMING,
VIDEO_FRAME_INPRG,
VIDEO_STOPPED,
VIDEO_CLOCKS_ON,
};
struct aspeed_video_addr {
unsigned int size;
dma_addr_t dma;
void *virt;
};
struct aspeed_video_buffer {
struct vb2_v4l2_buffer vb;
struct list_head link;
};
struct aspeed_video_perf {
ktime_t last_sample;
u32 totaltime;
u32 duration;
u32 duration_min;
u32 duration_max;
};
#define to_aspeed_video_buffer(x) \
container_of((x), struct aspeed_video_buffer, vb)
struct aspeed_video {
void __iomem *base;
struct clk *eclk;
struct clk *vclk;
struct device *dev;
struct v4l2_ctrl_handler ctrl_handler;
struct v4l2_device v4l2_dev;
struct v4l2_pix_format pix_fmt;
struct v4l2_bt_timings active_timings;
struct v4l2_bt_timings detected_timings;
u32 v4l2_input_status;
struct vb2_queue queue;
struct video_device vdev;
struct mutex video_lock; /* v4l2 and videobuf2 lock */
u32 jpeg_mode;
u32 comp_size_read;
wait_queue_head_t wait;
spinlock_t lock; /* buffer list lock */
struct delayed_work res_work;
struct list_head buffers;
unsigned long flags;
unsigned int sequence;
unsigned int max_compressed_size;
struct aspeed_video_addr srcs[2];
struct aspeed_video_addr jpeg;
bool yuv420;
unsigned int frame_rate;
unsigned int jpeg_quality;
unsigned int frame_bottom;
unsigned int frame_left;
unsigned int frame_right;
unsigned int frame_top;
struct aspeed_video_perf perf;
};
#define to_aspeed_video(x) container_of((x), struct aspeed_video, v4l2_dev)
struct aspeed_video_config {
u32 jpeg_mode;
u32 comp_size_read;
};
static const struct aspeed_video_config ast2400_config = {
.jpeg_mode = AST2400_VE_SEQ_CTRL_JPEG_MODE,
.comp_size_read = AST2400_VE_COMP_SIZE_READ_BACK,
};
static const struct aspeed_video_config ast2500_config = {
.jpeg_mode = AST2500_VE_SEQ_CTRL_JPEG_MODE,
.comp_size_read = AST2400_VE_COMP_SIZE_READ_BACK,
};
static const struct aspeed_video_config ast2600_config = {
.jpeg_mode = AST2500_VE_SEQ_CTRL_JPEG_MODE,
.comp_size_read = AST2600_VE_COMP_SIZE_READ_BACK,
};
static const u32 aspeed_video_jpeg_header[ASPEED_VIDEO_JPEG_HEADER_SIZE] = {
0xe0ffd8ff, 0x464a1000, 0x01004649, 0x60000101, 0x00006000, 0x0f00feff,
0x00002d05, 0x00000000, 0x00000000, 0x00dbff00
};
static const u32 aspeed_video_jpeg_quant[ASPEED_VIDEO_JPEG_QUANT_SIZE] = {
0x081100c0, 0x00000000, 0x00110103, 0x03011102, 0xc4ff0111, 0x00001f00,
0x01010501, 0x01010101, 0x00000000, 0x00000000, 0x04030201, 0x08070605,
0xff0b0a09, 0x10b500c4, 0x03010200, 0x03040203, 0x04040505, 0x7d010000,
0x00030201, 0x12051104, 0x06413121, 0x07615113, 0x32147122, 0x08a19181,
0xc1b14223, 0xf0d15215, 0x72623324, 0x160a0982, 0x1a191817, 0x28272625,
0x35342a29, 0x39383736, 0x4544433a, 0x49484746, 0x5554534a, 0x59585756,
0x6564635a, 0x69686766, 0x7574736a, 0x79787776, 0x8584837a, 0x89888786,
0x9493928a, 0x98979695, 0xa3a29a99, 0xa7a6a5a4, 0xb2aaa9a8, 0xb6b5b4b3,
0xbab9b8b7, 0xc5c4c3c2, 0xc9c8c7c6, 0xd4d3d2ca, 0xd8d7d6d5, 0xe2e1dad9,
0xe6e5e4e3, 0xeae9e8e7, 0xf4f3f2f1, 0xf8f7f6f5, 0xc4fffaf9, 0x00011f00,
0x01010103, 0x01010101, 0x00000101, 0x00000000, 0x04030201, 0x08070605,
0xff0b0a09, 0x11b500c4, 0x02010200, 0x04030404, 0x04040507, 0x77020100,
0x03020100, 0x21050411, 0x41120631, 0x71610751, 0x81322213, 0x91421408,
0x09c1b1a1, 0xf0523323, 0xd1726215, 0x3424160a, 0x17f125e1, 0x261a1918,
0x2a292827, 0x38373635, 0x44433a39, 0x48474645, 0x54534a49, 0x58575655,
0x64635a59, 0x68676665, 0x74736a69, 0x78777675, 0x83827a79, 0x87868584,
0x928a8988, 0x96959493, 0x9a999897, 0xa5a4a3a2, 0xa9a8a7a6, 0xb4b3b2aa,
0xb8b7b6b5, 0xc3c2bab9, 0xc7c6c5c4, 0xd2cac9c8, 0xd6d5d4d3, 0xdad9d8d7,
0xe5e4e3e2, 0xe9e8e7e6, 0xf4f3f2ea, 0xf8f7f6f5, 0xdafffaf9, 0x01030c00,
0x03110200, 0x003f0011
};
static const u32 aspeed_video_jpeg_dct[ASPEED_VIDEO_JPEG_NUM_QUALITIES]
[ASPEED_VIDEO_JPEG_DCT_SIZE] = {
{ 0x0d140043, 0x0c0f110f, 0x11101114, 0x17141516, 0x1e20321e,
0x3d1e1b1b, 0x32242e2b, 0x4b4c3f48, 0x44463f47, 0x61735a50,
0x566c5550, 0x88644644, 0x7a766c65, 0x4d808280, 0x8c978d60,
0x7e73967d, 0xdbff7b80, 0x1f014300, 0x272d2121, 0x3030582d,
0x697bb958, 0xb8b9b97b, 0xb9b8a6a6, 0xb9b9b9b9, 0xb9b9b9b9,
0xb9b9b9b9, 0xb9b9b9b9, 0xb9b9b9b9, 0xb9b9b9b9, 0xb9b9b9b9,
0xb9b9b9b9, 0xb9b9b9b9, 0xb9b9b9b9, 0xffb9b9b9 },
{ 0x0c110043, 0x0a0d0f0d, 0x0f0e0f11, 0x14111213, 0x1a1c2b1a,
0x351a1818, 0x2b1f2826, 0x4142373f, 0x3c3d373e, 0x55644e46,
0x4b5f4a46, 0x77573d3c, 0x6b675f58, 0x43707170, 0x7a847b54,
0x6e64836d, 0xdbff6c70, 0x1b014300, 0x22271d1d, 0x2a2a4c27,
0x5b6ba04c, 0xa0a0a06b, 0xa0a0a0a0, 0xa0a0a0a0, 0xa0a0a0a0,
0xa0a0a0a0, 0xa0a0a0a0, 0xa0a0a0a0, 0xa0a0a0a0, 0xa0a0a0a0,
0xa0a0a0a0, 0xa0a0a0a0, 0xa0a0a0a0, 0xffa0a0a0 },
{ 0x090e0043, 0x090a0c0a, 0x0c0b0c0e, 0x110e0f10, 0x15172415,
0x2c151313, 0x241a211f, 0x36372e34, 0x31322e33, 0x4653413a,
0x3e4e3d3a, 0x62483231, 0x58564e49, 0x385d5e5d, 0x656d6645,
0x5b536c5a, 0xdbff595d, 0x16014300, 0x1c201818, 0x22223f20,
0x4b58853f, 0x85858558, 0x85858585, 0x85858585, 0x85858585,
0x85858585, 0x85858585, 0x85858585, 0x85858585, 0x85858585,
0x85858585, 0x85858585, 0x85858585, 0xff858585 },
{ 0x070b0043, 0x07080a08, 0x0a090a0b, 0x0d0b0c0c, 0x11121c11,
0x23110f0f, 0x1c141a19, 0x2b2b2429, 0x27282428, 0x3842332e,
0x313e302e, 0x4e392827, 0x46443e3a, 0x2c4a4a4a, 0x50565137,
0x48425647, 0xdbff474a, 0x12014300, 0x161a1313, 0x1c1c331a,
0x3d486c33, 0x6c6c6c48, 0x6c6c6c6c, 0x6c6c6c6c, 0x6c6c6c6c,
0x6c6c6c6c, 0x6c6c6c6c, 0x6c6c6c6c, 0x6c6c6c6c, 0x6c6c6c6c,
0x6c6c6c6c, 0x6c6c6c6c, 0x6c6c6c6c, 0xff6c6c6c },
{ 0x06090043, 0x05060706, 0x07070709, 0x0a09090a, 0x0d0e160d,
0x1b0d0c0c, 0x16101413, 0x21221c20, 0x1e1f1c20, 0x2b332824,
0x26302624, 0x3d2d1f1e, 0x3735302d, 0x22393a39, 0x3f443f2b,
0x38334338, 0xdbff3739, 0x0d014300, 0x11130e0e, 0x15152613,
0x2d355026, 0x50505035, 0x50505050, 0x50505050, 0x50505050,
0x50505050, 0x50505050, 0x50505050, 0x50505050, 0x50505050,
0x50505050, 0x50505050, 0x50505050, 0xff505050 },
{ 0x04060043, 0x03040504, 0x05040506, 0x07060606, 0x09090f09,
0x12090808, 0x0f0a0d0d, 0x16161315, 0x14151315, 0x1d221b18,
0x19201918, 0x281e1514, 0x2423201e, 0x17262726, 0x2a2d2a1c,
0x25222d25, 0xdbff2526, 0x09014300, 0x0b0d0a0a, 0x0e0e1a0d,
0x1f25371a, 0x37373725, 0x37373737, 0x37373737, 0x37373737,
0x37373737, 0x37373737, 0x37373737, 0x37373737, 0x37373737,
0x37373737, 0x37373737, 0x37373737, 0xff373737 },
{ 0x02030043, 0x01020202, 0x02020203, 0x03030303, 0x04040704,
0x09040404, 0x07050606, 0x0b0b090a, 0x0a0a090a, 0x0e110d0c,
0x0c100c0c, 0x140f0a0a, 0x1211100f, 0x0b131313, 0x1516150e,
0x12111612, 0xdbff1213, 0x04014300, 0x05060505, 0x07070d06,
0x0f121b0d, 0x1b1b1b12, 0x1b1b1b1b, 0x1b1b1b1b, 0x1b1b1b1b,
0x1b1b1b1b, 0x1b1b1b1b, 0x1b1b1b1b, 0x1b1b1b1b, 0x1b1b1b1b,
0x1b1b1b1b, 0x1b1b1b1b, 0x1b1b1b1b, 0xff1b1b1b },
{ 0x01020043, 0x01010101, 0x01010102, 0x02020202, 0x03030503,
0x06030202, 0x05030404, 0x07070607, 0x06070607, 0x090b0908,
0x080a0808, 0x0d0a0706, 0x0c0b0a0a, 0x070c0d0c, 0x0e0f0e09,
0x0c0b0f0c, 0xdbff0c0c, 0x03014300, 0x03040303, 0x04040804,
0x0a0c1208, 0x1212120c, 0x12121212, 0x12121212, 0x12121212,
0x12121212, 0x12121212, 0x12121212, 0x12121212, 0x12121212,
0x12121212, 0x12121212, 0x12121212, 0xff121212 },
{ 0x01020043, 0x01010101, 0x01010102, 0x02020202, 0x03030503,
0x06030202, 0x05030404, 0x07070607, 0x06070607, 0x090b0908,
0x080a0808, 0x0d0a0706, 0x0c0b0a0a, 0x070c0d0c, 0x0e0f0e09,
0x0c0b0f0c, 0xdbff0c0c, 0x02014300, 0x03030202, 0x04040703,
0x080a0f07, 0x0f0f0f0a, 0x0f0f0f0f, 0x0f0f0f0f, 0x0f0f0f0f,
0x0f0f0f0f, 0x0f0f0f0f, 0x0f0f0f0f, 0x0f0f0f0f, 0x0f0f0f0f,
0x0f0f0f0f, 0x0f0f0f0f, 0x0f0f0f0f, 0xff0f0f0f },
{ 0x01010043, 0x01010101, 0x01010101, 0x01010101, 0x02020302,
0x04020202, 0x03020303, 0x05050405, 0x05050405, 0x07080606,
0x06080606, 0x0a070505, 0x09080807, 0x05090909, 0x0a0b0a07,
0x09080b09, 0xdbff0909, 0x02014300, 0x02030202, 0x03030503,
0x07080c05, 0x0c0c0c08, 0x0c0c0c0c, 0x0c0c0c0c, 0x0c0c0c0c,
0x0c0c0c0c, 0x0c0c0c0c, 0x0c0c0c0c, 0x0c0c0c0c, 0x0c0c0c0c,
0x0c0c0c0c, 0x0c0c0c0c, 0x0c0c0c0c, 0xff0c0c0c },
{ 0x01010043, 0x01010101, 0x01010101, 0x01010101, 0x01010201,
0x03010101, 0x02010202, 0x03030303, 0x03030303, 0x04050404,
0x04050404, 0x06050303, 0x06050505, 0x03060606, 0x07070704,
0x06050706, 0xdbff0606, 0x01014300, 0x01020101, 0x02020402,
0x05060904, 0x09090906, 0x09090909, 0x09090909, 0x09090909,
0x09090909, 0x09090909, 0x09090909, 0x09090909, 0x09090909,
0x09090909, 0x09090909, 0x09090909, 0xff090909 },
{ 0x01010043, 0x01010101, 0x01010101, 0x01010101, 0x01010101,
0x01010101, 0x01010101, 0x01010101, 0x01010101, 0x02020202,
0x02020202, 0x03020101, 0x03020202, 0x01030303, 0x03030302,
0x03020303, 0xdbff0403, 0x01014300, 0x01010101, 0x01010201,
0x03040602, 0x06060604, 0x06060606, 0x06060606, 0x06060606,
0x06060606, 0x06060606, 0x06060606, 0x06060606, 0x06060606,
0x06060606, 0x06060606, 0x06060606, 0xff060606 }
};
static const struct v4l2_dv_timings_cap aspeed_video_timings_cap = {
.type = V4L2_DV_BT_656_1120,
.bt = {
.min_width = MIN_WIDTH,
.max_width = MAX_WIDTH,
.min_height = MIN_HEIGHT,
.max_height = MAX_HEIGHT,
.min_pixelclock = 6574080, /* 640 x 480 x 24Hz */
.max_pixelclock = 138240000, /* 1920 x 1200 x 60Hz */
.standards = V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT |
V4L2_DV_BT_STD_CVT | V4L2_DV_BT_STD_GTF,
.capabilities = V4L2_DV_BT_CAP_PROGRESSIVE |
V4L2_DV_BT_CAP_REDUCED_BLANKING |
V4L2_DV_BT_CAP_CUSTOM,
},
};
static void aspeed_video_init_jpeg_table(u32 *table, bool yuv420)
{
int i;
unsigned int base;
for (i = 0; i < ASPEED_VIDEO_JPEG_NUM_QUALITIES; i++) {
base = 256 * i; /* AST HW requires this header spacing */
memcpy(&table[base], aspeed_video_jpeg_header,
sizeof(aspeed_video_jpeg_header));
base += ASPEED_VIDEO_JPEG_HEADER_SIZE;
memcpy(&table[base], aspeed_video_jpeg_dct[i],
sizeof(aspeed_video_jpeg_dct[i]));
base += ASPEED_VIDEO_JPEG_DCT_SIZE;
memcpy(&table[base], aspeed_video_jpeg_quant,
sizeof(aspeed_video_jpeg_quant));
if (yuv420)
table[base + 2] = 0x00220103;
}
}
// just update jpeg dct table per 420/444
static void aspeed_video_update_jpeg_table(u32 *table, bool yuv420)
{
int i;
unsigned int base;
for (i = 0; i < ASPEED_VIDEO_JPEG_NUM_QUALITIES; i++) {
base = 256 * i; /* AST HW requires this header spacing */
base += ASPEED_VIDEO_JPEG_HEADER_SIZE +
ASPEED_VIDEO_JPEG_DCT_SIZE;
table[base + 2] = (yuv420) ? 0x00220103 : 0x00110103;
}
}
static void aspeed_video_update(struct aspeed_video *video, u32 reg, u32 clear,
u32 bits)
{
u32 t = readl(video->base + reg);
u32 before = t;
t &= ~clear;
t |= bits;
writel(t, video->base + reg);
dev_dbg(video->dev, "update %03x[%08x -> %08x]\n", reg, before,
readl(video->base + reg));
}
static u32 aspeed_video_read(struct aspeed_video *video, u32 reg)
{
u32 t = readl(video->base + reg);
dev_dbg(video->dev, "read %03x[%08x]\n", reg, t);
return t;
}
static void aspeed_video_write(struct aspeed_video *video, u32 reg, u32 val)
{
writel(val, video->base + reg);
dev_dbg(video->dev, "write %03x[%08x]\n", reg,
readl(video->base + reg));
}
static void update_perf(struct aspeed_video_perf *p)
{
p->duration =
ktime_to_ms(ktime_sub(ktime_get(), p->last_sample));
p->totaltime += p->duration;
p->duration_max = max(p->duration, p->duration_max);
p->duration_min = min(p->duration, p->duration_min);
}
static int aspeed_video_start_frame(struct aspeed_video *video)
{
dma_addr_t addr;
unsigned long flags;
struct aspeed_video_buffer *buf;
u32 seq_ctrl = aspeed_video_read(video, VE_SEQ_CTRL);
if (video->v4l2_input_status) {
dev_dbg(video->dev, "No signal; don't start frame\n");
return 0;
}
if (!(seq_ctrl & VE_SEQ_CTRL_COMP_BUSY) ||
!(seq_ctrl & VE_SEQ_CTRL_CAP_BUSY)) {
dev_dbg(video->dev, "Engine busy; don't start frame\n");
return -EBUSY;
}
spin_lock_irqsave(&video->lock, flags);
buf = list_first_entry_or_null(&video->buffers,
struct aspeed_video_buffer, link);
if (!buf) {
spin_unlock_irqrestore(&video->lock, flags);
dev_dbg(video->dev, "No buffers; don't start frame\n");
return -EPROTO;
}
set_bit(VIDEO_FRAME_INPRG, &video->flags);
addr = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0);
spin_unlock_irqrestore(&video->lock, flags);
aspeed_video_write(video, VE_COMP_PROC_OFFSET, 0);
aspeed_video_write(video, VE_COMP_OFFSET, 0);
aspeed_video_write(video, VE_COMP_ADDR, addr);
aspeed_video_update(video, VE_INTERRUPT_CTRL, 0,
VE_INTERRUPT_COMP_COMPLETE);
video->perf.last_sample = ktime_get();
aspeed_video_update(video, VE_SEQ_CTRL, 0,
VE_SEQ_CTRL_TRIG_CAPTURE | VE_SEQ_CTRL_TRIG_COMP);
return 0;
}
static void aspeed_video_enable_mode_detect(struct aspeed_video *video)
{
/* Enable mode detect interrupts */
aspeed_video_update(video, VE_INTERRUPT_CTRL, 0,
VE_INTERRUPT_MODE_DETECT);
/* Disable mode detect in order to re-trigger */
aspeed_video_update(video, VE_SEQ_CTRL,
VE_SEQ_CTRL_TRIG_MODE_DET, 0);
/* Trigger mode detect */
aspeed_video_update(video, VE_SEQ_CTRL, 0, VE_SEQ_CTRL_TRIG_MODE_DET);
}
static void aspeed_video_off(struct aspeed_video *video)
{
if (!test_bit(VIDEO_CLOCKS_ON, &video->flags))
return;
/* Disable interrupts */
aspeed_video_write(video, VE_INTERRUPT_CTRL, 0);
aspeed_video_write(video, VE_INTERRUPT_STATUS, 0xffffffff);
/* Turn off the relevant clocks */
clk_disable(video->eclk);
clk_disable(video->vclk);
clear_bit(VIDEO_CLOCKS_ON, &video->flags);
}
static void aspeed_video_on(struct aspeed_video *video)
{
if (test_bit(VIDEO_CLOCKS_ON, &video->flags))
return;
/* Turn on the relevant clocks */
clk_enable(video->vclk);
clk_enable(video->eclk);
set_bit(VIDEO_CLOCKS_ON, &video->flags);
}
static void aspeed_video_bufs_done(struct aspeed_video *video,
enum vb2_buffer_state state)
{
unsigned long flags;
struct aspeed_video_buffer *buf;
spin_lock_irqsave(&video->lock, flags);
list_for_each_entry(buf, &video->buffers, link)
vb2_buffer_done(&buf->vb.vb2_buf, state);
INIT_LIST_HEAD(&video->buffers);
spin_unlock_irqrestore(&video->lock, flags);
}
static void aspeed_video_irq_res_change(struct aspeed_video *video, ulong delay)
{
dev_dbg(video->dev, "Resolution changed; resetting\n");
set_bit(VIDEO_RES_CHANGE, &video->flags);
clear_bit(VIDEO_FRAME_INPRG, &video->flags);
video->v4l2_input_status = V4L2_IN_ST_NO_SIGNAL;
aspeed_video_off(video);
aspeed_video_bufs_done(video, VB2_BUF_STATE_ERROR);
schedule_delayed_work(&video->res_work, delay);
}
static irqreturn_t aspeed_video_irq(int irq, void *arg)
{
struct aspeed_video *video = arg;
u32 sts = aspeed_video_read(video, VE_INTERRUPT_STATUS);
/*
* Hardware sometimes asserts interrupts that we haven't actually
* enabled; ignore them if so.
*/
sts &= aspeed_video_read(video, VE_INTERRUPT_CTRL);
/*
* Resolution changed or signal was lost; reset the engine and
* re-initialize
*/
if (sts & VE_INTERRUPT_MODE_DETECT_WD) {
aspeed_video_irq_res_change(video, 0);
return IRQ_HANDLED;
}
if (sts & VE_INTERRUPT_MODE_DETECT) {
if (test_bit(VIDEO_RES_DETECT, &video->flags)) {
aspeed_video_update(video, VE_INTERRUPT_CTRL,
VE_INTERRUPT_MODE_DETECT, 0);
aspeed_video_write(video, VE_INTERRUPT_STATUS,
VE_INTERRUPT_MODE_DETECT);
sts &= ~VE_INTERRUPT_MODE_DETECT;
set_bit(VIDEO_MODE_DETECT_DONE, &video->flags);
wake_up_interruptible_all(&video->wait);
} else {
/*
* Signal acquired while NOT doing resolution
* detection; reset the engine and re-initialize
*/
aspeed_video_irq_res_change(video,
RESOLUTION_CHANGE_DELAY);
return IRQ_HANDLED;
}
}
if (sts & VE_INTERRUPT_COMP_COMPLETE) {
struct aspeed_video_buffer *buf;
u32 frame_size = aspeed_video_read(video,
video->comp_size_read);
update_perf(&video->perf);
spin_lock(&video->lock);
clear_bit(VIDEO_FRAME_INPRG, &video->flags);
buf = list_first_entry_or_null(&video->buffers,
struct aspeed_video_buffer,
link);
if (buf) {
vb2_set_plane_payload(&buf->vb.vb2_buf, 0, frame_size);
if (!list_is_last(&buf->link, &video->buffers)) {
buf->vb.vb2_buf.timestamp = ktime_get_ns();
buf->vb.sequence = video->sequence++;
buf->vb.field = V4L2_FIELD_NONE;
vb2_buffer_done(&buf->vb.vb2_buf,
VB2_BUF_STATE_DONE);
list_del(&buf->link);
}
}
spin_unlock(&video->lock);
aspeed_video_update(video, VE_SEQ_CTRL,
VE_SEQ_CTRL_TRIG_CAPTURE |
VE_SEQ_CTRL_FORCE_IDLE |
VE_SEQ_CTRL_TRIG_COMP, 0);
aspeed_video_update(video, VE_INTERRUPT_CTRL,
VE_INTERRUPT_COMP_COMPLETE, 0);
aspeed_video_write(video, VE_INTERRUPT_STATUS,
VE_INTERRUPT_COMP_COMPLETE);
sts &= ~VE_INTERRUPT_COMP_COMPLETE;
if (test_bit(VIDEO_STREAMING, &video->flags) && buf)
aspeed_video_start_frame(video);
}
return sts ? IRQ_NONE : IRQ_HANDLED;
}
static void aspeed_video_check_and_set_polarity(struct aspeed_video *video)
{
int i;
int hsync_counter = 0;
int vsync_counter = 0;
u32 sts, ctrl;
for (i = 0; i < NUM_POLARITY_CHECKS; ++i) {
sts = aspeed_video_read(video, VE_MODE_DETECT_STATUS);
if (sts & VE_MODE_DETECT_STATUS_VSYNC)
vsync_counter--;
else
vsync_counter++;
if (sts & VE_MODE_DETECT_STATUS_HSYNC)
hsync_counter--;
else
hsync_counter++;
}
ctrl = aspeed_video_read(video, VE_CTRL);
if (hsync_counter < 0) {
ctrl |= VE_CTRL_HSYNC_POL;
video->detected_timings.polarities &=
~V4L2_DV_HSYNC_POS_POL;
} else {
ctrl &= ~VE_CTRL_HSYNC_POL;
video->detected_timings.polarities |=
V4L2_DV_HSYNC_POS_POL;
}
if (vsync_counter < 0) {
ctrl |= VE_CTRL_VSYNC_POL;
video->detected_timings.polarities &=
~V4L2_DV_VSYNC_POS_POL;
} else {
ctrl &= ~VE_CTRL_VSYNC_POL;
video->detected_timings.polarities |=
V4L2_DV_VSYNC_POS_POL;
}
aspeed_video_write(video, VE_CTRL, ctrl);
}
static bool aspeed_video_alloc_buf(struct aspeed_video *video,
struct aspeed_video_addr *addr,
unsigned int size)
{
addr->virt = dma_alloc_coherent(video->dev, size, &addr->dma,
GFP_KERNEL);
if (!addr->virt)
return false;
addr->size = size;
return true;
}
static void aspeed_video_free_buf(struct aspeed_video *video,
struct aspeed_video_addr *addr)
{
dma_free_coherent(video->dev, addr->size, addr->virt, addr->dma);
addr->size = 0;
addr->dma = 0ULL;
addr->virt = NULL;
}
/*
* Get the minimum HW-supported compression buffer size for the frame size.
* Assume worst-case JPEG compression size is 1/8 raw size. This should be
* plenty even for maximum quality; any worse and the engine will simply return
* incomplete JPEGs.
*/
static void aspeed_video_calc_compressed_size(struct aspeed_video *video,
unsigned int frame_size)
{
int i, j;
u32 compression_buffer_size_reg = 0;
unsigned int size;
const unsigned int num_compression_packets = 4;
const unsigned int compression_packet_size = 1024;
const unsigned int max_compressed_size = frame_size / 2; /* 4bpp / 8 */
video->max_compressed_size = UINT_MAX;
for (i = 0; i < 6; ++i) {
for (j = 0; j < 8; ++j) {
size = (num_compression_packets << i) *
(compression_packet_size << j);
if (size < max_compressed_size)
continue;
if (size < video->max_compressed_size) {
compression_buffer_size_reg = (i << 3) | j;
video->max_compressed_size = size;
}
}
}
aspeed_video_write(video, VE_STREAM_BUF_SIZE,
compression_buffer_size_reg);
dev_dbg(video->dev, "Max compressed size: %x\n",
video->max_compressed_size);
}
#define res_check(v) test_and_clear_bit(VIDEO_MODE_DETECT_DONE, &(v)->flags)
static void aspeed_video_get_resolution(struct aspeed_video *video)
{
bool invalid_resolution = true;
int rc;
int tries = 0;
u32 mds;
u32 src_lr_edge;
u32 src_tb_edge;
u32 sync;
struct v4l2_bt_timings *det = &video->detected_timings;
det->width = MIN_WIDTH;
det->height = MIN_HEIGHT;
video->v4l2_input_status = V4L2_IN_ST_NO_SIGNAL;
memset(&video->perf, 0, sizeof(video->perf));
do {
if (tries) {
set_current_state(TASK_INTERRUPTIBLE);
if (schedule_timeout(INVALID_RESOLUTION_DELAY))
return;
}
set_bit(VIDEO_RES_DETECT, &video->flags);
aspeed_video_update(video, VE_CTRL,
VE_CTRL_VSYNC_POL | VE_CTRL_HSYNC_POL, 0);
aspeed_video_enable_mode_detect(video);
rc = wait_event_interruptible_timeout(video->wait,
res_check(video),
MODE_DETECT_TIMEOUT);
if (!rc) {
dev_dbg(video->dev, "Timed out; first mode detect\n");
clear_bit(VIDEO_RES_DETECT, &video->flags);
return;
}
aspeed_video_check_and_set_polarity(video);
aspeed_video_enable_mode_detect(video);
rc = wait_event_interruptible_timeout(video->wait,
res_check(video),
MODE_DETECT_TIMEOUT);
clear_bit(VIDEO_RES_DETECT, &video->flags);
if (!rc) {
dev_dbg(video->dev, "Timed out; second mode detect\n");
return;
}
src_lr_edge = aspeed_video_read(video, VE_SRC_LR_EDGE_DET);
src_tb_edge = aspeed_video_read(video, VE_SRC_TB_EDGE_DET);
mds = aspeed_video_read(video, VE_MODE_DETECT_STATUS);
sync = aspeed_video_read(video, VE_SYNC_STATUS);
video->frame_bottom = (src_tb_edge & VE_SRC_TB_EDGE_DET_BOT) >>
VE_SRC_TB_EDGE_DET_BOT_SHF;
video->frame_top = src_tb_edge & VE_SRC_TB_EDGE_DET_TOP;
det->vfrontporch = video->frame_top;
det->vbackporch = ((mds & VE_MODE_DETECT_V_LINES) >>
VE_MODE_DETECT_V_LINES_SHF) - video->frame_bottom;
det->vsync = (sync & VE_SYNC_STATUS_VSYNC) >>
VE_SYNC_STATUS_VSYNC_SHF;
if (video->frame_top > video->frame_bottom)
continue;
video->frame_right = (src_lr_edge & VE_SRC_LR_EDGE_DET_RT) >>
VE_SRC_LR_EDGE_DET_RT_SHF;
video->frame_left = src_lr_edge & VE_SRC_LR_EDGE_DET_LEFT;
det->hfrontporch = video->frame_left;
det->hbackporch = (mds & VE_MODE_DETECT_H_PIXELS) -
video->frame_right;
det->hsync = sync & VE_SYNC_STATUS_HSYNC;
if (video->frame_left > video->frame_right)
continue;
invalid_resolution = false;
} while (invalid_resolution && (tries++ < INVALID_RESOLUTION_RETRIES));
if (invalid_resolution) {
dev_dbg(video->dev, "Invalid resolution detected\n");
return;
}
det->height = (video->frame_bottom - video->frame_top) + 1;
det->width = (video->frame_right - video->frame_left) + 1;
video->v4l2_input_status = 0;
/*
* Enable mode-detect watchdog, resolution-change watchdog and
* automatic compression after frame capture.
*/
aspeed_video_update(video, VE_INTERRUPT_CTRL, 0,
VE_INTERRUPT_MODE_DETECT_WD);
aspeed_video_update(video, VE_SEQ_CTRL, 0,
VE_SEQ_CTRL_AUTO_COMP | VE_SEQ_CTRL_EN_WATCHDOG);
dev_dbg(video->dev, "Got resolution: %dx%d\n", det->width,
det->height);
}
static void aspeed_video_set_resolution(struct aspeed_video *video)
{
struct v4l2_bt_timings *act = &video->active_timings;
unsigned int size = act->width * act->height;
/* Set capture/compression frame sizes */
aspeed_video_calc_compressed_size(video, size);
if (video->active_timings.width == 1680) {
/*
* This is a workaround to fix a silicon bug on A1 and A2
* revisions. Since it doesn't break capturing operation of
* other revisions, use it for all revisions without checking
* the revision ID. It picked 1728 which is a very next
* 64-pixels aligned value to 1680 to minimize memory bandwidth
* and to get better access speed from video engine.
*/
aspeed_video_write(video, VE_CAP_WINDOW,
1728 << 16 | act->height);
size += (1728 - 1680) * video->active_timings.height;
} else {
aspeed_video_write(video, VE_CAP_WINDOW,
act->width << 16 | act->height);
}
aspeed_video_write(video, VE_COMP_WINDOW,
act->width << 16 | act->height);
aspeed_video_write(video, VE_SRC_SCANLINE_OFFSET, act->width * 4);
/* Don't use direct mode below 1024 x 768 (irqs don't fire) */
if (size < DIRECT_FETCH_THRESHOLD) {
aspeed_video_write(video, VE_TGS_0,
FIELD_PREP(VE_TGS_FIRST,
video->frame_left - 1) |
FIELD_PREP(VE_TGS_LAST,
video->frame_right));
aspeed_video_write(video, VE_TGS_1,
FIELD_PREP(VE_TGS_FIRST, video->frame_top) |
FIELD_PREP(VE_TGS_LAST,
video->frame_bottom + 1));
aspeed_video_update(video, VE_CTRL, 0, VE_CTRL_INT_DE);
} else {
aspeed_video_update(video, VE_CTRL, 0, VE_CTRL_DIRECT_FETCH);
}
size *= 4;
if (size != video->srcs[0].size) {
if (video->srcs[0].size)
aspeed_video_free_buf(video, &video->srcs[0]);
if (video->srcs[1].size)
aspeed_video_free_buf(video, &video->srcs[1]);
if (!aspeed_video_alloc_buf(video, &video->srcs[0], size))
goto err_mem;
if (!aspeed_video_alloc_buf(video, &video->srcs[1], size))
goto err_mem;
aspeed_video_write(video, VE_SRC0_ADDR, video->srcs[0].dma);
aspeed_video_write(video, VE_SRC1_ADDR, video->srcs[1].dma);
}
return;
err_mem:
dev_err(video->dev, "Failed to allocate source buffers\n");
if (video->srcs[0].size)
aspeed_video_free_buf(video, &video->srcs[0]);
}
static void aspeed_video_init_regs(struct aspeed_video *video)
{
u32 comp_ctrl = VE_COMP_CTRL_RSVD |
FIELD_PREP(VE_COMP_CTRL_DCT_LUM, video->jpeg_quality) |
FIELD_PREP(VE_COMP_CTRL_DCT_CHR, video->jpeg_quality | 0x10);
u32 ctrl = VE_CTRL_AUTO_OR_CURSOR;
u32 seq_ctrl = video->jpeg_mode;
if (video->frame_rate)
ctrl |= FIELD_PREP(VE_CTRL_FRC, video->frame_rate);
if (video->yuv420)
seq_ctrl |= VE_SEQ_CTRL_YUV420;
/* Unlock VE registers */
aspeed_video_write(video, VE_PROTECTION_KEY, VE_PROTECTION_KEY_UNLOCK);
/* Disable interrupts */
aspeed_video_write(video, VE_INTERRUPT_CTRL, 0);
aspeed_video_write(video, VE_INTERRUPT_STATUS, 0xffffffff);
/* Clear the offset */
aspeed_video_write(video, VE_COMP_PROC_OFFSET, 0);
aspeed_video_write(video, VE_COMP_OFFSET, 0);
aspeed_video_write(video, VE_JPEG_ADDR, video->jpeg.dma);
/* Set control registers */
aspeed_video_write(video, VE_SEQ_CTRL, seq_ctrl);
aspeed_video_write(video, VE_CTRL, ctrl);
aspeed_video_write(video, VE_COMP_CTRL, comp_ctrl);
/* Don't downscale */
aspeed_video_write(video, VE_SCALING_FACTOR, 0x10001000);
aspeed_video_write(video, VE_SCALING_FILTER0, 0x00200000);
aspeed_video_write(video, VE_SCALING_FILTER1, 0x00200000);
aspeed_video_write(video, VE_SCALING_FILTER2, 0x00200000);
aspeed_video_write(video, VE_SCALING_FILTER3, 0x00200000);
/* Set mode detection defaults */
aspeed_video_write(video, VE_MODE_DETECT, 0x22666500);
}
static void aspeed_video_start(struct aspeed_video *video)
{
aspeed_video_on(video);
aspeed_video_init_regs(video);
/* Resolution set to 640x480 if no signal found */
aspeed_video_get_resolution(video);
/* Set timings since the device is being opened for the first time */
video->active_timings = video->detected_timings;
aspeed_video_set_resolution(video);
video->pix_fmt.width = video->active_timings.width;
video->pix_fmt.height = video->active_timings.height;
video->pix_fmt.sizeimage = video->max_compressed_size;
}
static void aspeed_video_stop(struct aspeed_video *video)
{
set_bit(VIDEO_STOPPED, &video->flags);
cancel_delayed_work_sync(&video->res_work);
aspeed_video_off(video);
if (video->srcs[0].size)
aspeed_video_free_buf(video, &video->srcs[0]);
if (video->srcs[1].size)
aspeed_video_free_buf(video, &video->srcs[1]);
video->v4l2_input_status = V4L2_IN_ST_NO_SIGNAL;
video->flags = 0;
}
static int aspeed_video_querycap(struct file *file, void *fh,
struct v4l2_capability *cap)
{
strscpy(cap->driver, DEVICE_NAME, sizeof(cap->driver));
strscpy(cap->card, "Aspeed Video Engine", sizeof(cap->card));
snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
DEVICE_NAME);
return 0;
}
static int aspeed_video_enum_format(struct file *file, void *fh,
struct v4l2_fmtdesc *f)
{
if (f->index)
return -EINVAL;
f->pixelformat = V4L2_PIX_FMT_JPEG;
return 0;
}
static int aspeed_video_get_format(struct file *file, void *fh,
struct v4l2_format *f)
{
struct aspeed_video *video = video_drvdata(file);
f->fmt.pix = video->pix_fmt;
return 0;
}
static int aspeed_video_enum_input(struct file *file, void *fh,
struct v4l2_input *inp)
{
struct aspeed_video *video = video_drvdata(file);
if (inp->index)
return -EINVAL;
strscpy(inp->name, "Host VGA capture", sizeof(inp->name));
inp->type = V4L2_INPUT_TYPE_CAMERA;
inp->capabilities = V4L2_IN_CAP_DV_TIMINGS;
inp->status = video->v4l2_input_status;
return 0;
}
static int aspeed_video_get_input(struct file *file, void *fh, unsigned int *i)
{
*i = 0;
return 0;
}
static int aspeed_video_set_input(struct file *file, void *fh, unsigned int i)
{
if (i)
return -EINVAL;
return 0;
}
static int aspeed_video_get_parm(struct file *file, void *fh,
struct v4l2_streamparm *a)
{
struct aspeed_video *video = video_drvdata(file);
a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
a->parm.capture.readbuffers = 3;
a->parm.capture.timeperframe.numerator = 1;
if (!video->frame_rate)
a->parm.capture.timeperframe.denominator = MAX_FRAME_RATE;
else
a->parm.capture.timeperframe.denominator = video->frame_rate;
return 0;
}
static int aspeed_video_set_parm(struct file *file, void *fh,
struct v4l2_streamparm *a)
{
unsigned int frame_rate = 0;
struct aspeed_video *video = video_drvdata(file);
a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
a->parm.capture.readbuffers = 3;
if (a->parm.capture.timeperframe.numerator)
frame_rate = a->parm.capture.timeperframe.denominator /
a->parm.capture.timeperframe.numerator;
if (!frame_rate || frame_rate > MAX_FRAME_RATE) {
frame_rate = 0;
a->parm.capture.timeperframe.denominator = MAX_FRAME_RATE;
a->parm.capture.timeperframe.numerator = 1;
}
if (video->frame_rate != frame_rate) {
video->frame_rate = frame_rate;
aspeed_video_update(video, VE_CTRL, VE_CTRL_FRC,
FIELD_PREP(VE_CTRL_FRC, frame_rate));
}
return 0;
}
static int aspeed_video_enum_framesizes(struct file *file, void *fh,
struct v4l2_frmsizeenum *fsize)
{
struct aspeed_video *video = video_drvdata(file);
if (fsize->index)
return -EINVAL;
if (fsize->pixel_format != V4L2_PIX_FMT_JPEG)
return -EINVAL;
fsize->discrete.width = video->pix_fmt.width;
fsize->discrete.height = video->pix_fmt.height;
fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
return 0;
}
static int aspeed_video_enum_frameintervals(struct file *file, void *fh,
struct v4l2_frmivalenum *fival)
{
struct aspeed_video *video = video_drvdata(file);
if (fival->index)
return -EINVAL;
if (fival->width != video->detected_timings.width ||
fival->height != video->detected_timings.height)
return -EINVAL;
if (fival->pixel_format != V4L2_PIX_FMT_JPEG)
return -EINVAL;
fival->type = V4L2_FRMIVAL_TYPE_CONTINUOUS;
fival->stepwise.min.denominator = MAX_FRAME_RATE;
fival->stepwise.min.numerator = 1;
fival->stepwise.max.denominator = 1;
fival->stepwise.max.numerator = 1;
fival->stepwise.step = fival->stepwise.max;
return 0;
}
static int aspeed_video_set_dv_timings(struct file *file, void *fh,
struct v4l2_dv_timings *timings)
{
struct aspeed_video *video = video_drvdata(file);
if (timings->bt.width == video->active_timings.width &&
timings->bt.height == video->active_timings.height)
return 0;
if (vb2_is_busy(&video->queue))
return -EBUSY;
video->active_timings = timings->bt;
aspeed_video_set_resolution(video);
video->pix_fmt.width = timings->bt.width;
video->pix_fmt.height = timings->bt.height;
video->pix_fmt.sizeimage = video->max_compressed_size;
timings->type = V4L2_DV_BT_656_1120;
return 0;
}
static int aspeed_video_get_dv_timings(struct file *file, void *fh,
struct v4l2_dv_timings *timings)
{
struct aspeed_video *video = video_drvdata(file);
timings->type = V4L2_DV_BT_656_1120;
timings->bt = video->active_timings;
return 0;
}
static int aspeed_video_query_dv_timings(struct file *file, void *fh,
struct v4l2_dv_timings *timings)
{
int rc;
struct aspeed_video *video = video_drvdata(file);
/*
* This blocks only if the driver is currently in the process of
* detecting a new resolution; in the event of no signal or timeout
* this function is woken up.
*/
if (file->f_flags & O_NONBLOCK) {
if (test_bit(VIDEO_RES_CHANGE, &video->flags))
return -EAGAIN;
} else {
rc = wait_event_interruptible(video->wait,
!test_bit(VIDEO_RES_CHANGE,
&video->flags));
if (rc)
return -EINTR;
}
timings->type = V4L2_DV_BT_656_1120;
timings->bt = video->detected_timings;
return video->v4l2_input_status ? -ENOLINK : 0;
}
static int aspeed_video_enum_dv_timings(struct file *file, void *fh,
struct v4l2_enum_dv_timings *timings)
{
return v4l2_enum_dv_timings_cap(timings, &aspeed_video_timings_cap,
NULL, NULL);
}
static int aspeed_video_dv_timings_cap(struct file *file, void *fh,
struct v4l2_dv_timings_cap *cap)
{
*cap = aspeed_video_timings_cap;
return 0;
}
static int aspeed_video_sub_event(struct v4l2_fh *fh,
const struct v4l2_event_subscription *sub)
{
switch (sub->type) {
case V4L2_EVENT_SOURCE_CHANGE:
return v4l2_src_change_event_subscribe(fh, sub);
}
return v4l2_ctrl_subscribe_event(fh, sub);
}
static const struct v4l2_ioctl_ops aspeed_video_ioctl_ops = {
.vidioc_querycap = aspeed_video_querycap,
.vidioc_enum_fmt_vid_cap = aspeed_video_enum_format,
.vidioc_g_fmt_vid_cap = aspeed_video_get_format,
.vidioc_s_fmt_vid_cap = aspeed_video_get_format,
.vidioc_try_fmt_vid_cap = aspeed_video_get_format,
.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_enum_input = aspeed_video_enum_input,
.vidioc_g_input = aspeed_video_get_input,
.vidioc_s_input = aspeed_video_set_input,
.vidioc_g_parm = aspeed_video_get_parm,
.vidioc_s_parm = aspeed_video_set_parm,
.vidioc_enum_framesizes = aspeed_video_enum_framesizes,
.vidioc_enum_frameintervals = aspeed_video_enum_frameintervals,
.vidioc_s_dv_timings = aspeed_video_set_dv_timings,
.vidioc_g_dv_timings = aspeed_video_get_dv_timings,
.vidioc_query_dv_timings = aspeed_video_query_dv_timings,
.vidioc_enum_dv_timings = aspeed_video_enum_dv_timings,
.vidioc_dv_timings_cap = aspeed_video_dv_timings_cap,
.vidioc_subscribe_event = aspeed_video_sub_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
static void aspeed_video_update_jpeg_quality(struct aspeed_video *video)
{
u32 comp_ctrl = FIELD_PREP(VE_COMP_CTRL_DCT_LUM, video->jpeg_quality) |
FIELD_PREP(VE_COMP_CTRL_DCT_CHR, video->jpeg_quality | 0x10);
aspeed_video_update(video, VE_COMP_CTRL,
VE_COMP_CTRL_DCT_LUM | VE_COMP_CTRL_DCT_CHR,
comp_ctrl);
}
static void aspeed_video_update_subsampling(struct aspeed_video *video)
{
if (video->jpeg.virt)
aspeed_video_update_jpeg_table(video->jpeg.virt, video->yuv420);
if (video->yuv420)
aspeed_video_update(video, VE_SEQ_CTRL, 0, VE_SEQ_CTRL_YUV420);
else
aspeed_video_update(video, VE_SEQ_CTRL, VE_SEQ_CTRL_YUV420, 0);
}
static int aspeed_video_set_ctrl(struct v4l2_ctrl *ctrl)
{
struct aspeed_video *video = container_of(ctrl->handler,
struct aspeed_video,
ctrl_handler);
switch (ctrl->id) {
case V4L2_CID_JPEG_COMPRESSION_QUALITY:
video->jpeg_quality = ctrl->val;
aspeed_video_update_jpeg_quality(video);
break;
case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
if (ctrl->val == V4L2_JPEG_CHROMA_SUBSAMPLING_420) {
video->yuv420 = true;
aspeed_video_update_subsampling(video);
} else {
video->yuv420 = false;
aspeed_video_update_subsampling(video);
}
break;
default:
return -EINVAL;
}
return 0;
}
static const struct v4l2_ctrl_ops aspeed_video_ctrl_ops = {
.s_ctrl = aspeed_video_set_ctrl,
};
static void aspeed_video_resolution_work(struct work_struct *work)
{
struct delayed_work *dwork = to_delayed_work(work);
struct aspeed_video *video = container_of(dwork, struct aspeed_video,
res_work);
aspeed_video_on(video);
/* Exit early in case no clients remain */
if (test_bit(VIDEO_STOPPED, &video->flags))
goto done;
aspeed_video_init_regs(video);
aspeed_video_get_resolution(video);
if (video->detected_timings.width != video->active_timings.width ||
video->detected_timings.height != video->active_timings.height) {
static const struct v4l2_event ev = {
.type = V4L2_EVENT_SOURCE_CHANGE,
.u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION,
};
v4l2_event_queue(&video->vdev, &ev);
} else if (test_bit(VIDEO_STREAMING, &video->flags)) {
/* No resolution change so just restart streaming */
aspeed_video_start_frame(video);
}
done:
clear_bit(VIDEO_RES_CHANGE, &video->flags);
wake_up_interruptible_all(&video->wait);
}
static int aspeed_video_open(struct file *file)
{
int rc;
struct aspeed_video *video = video_drvdata(file);
mutex_lock(&video->video_lock);
rc = v4l2_fh_open(file);
if (rc) {
mutex_unlock(&video->video_lock);
return rc;
}
if (v4l2_fh_is_singular_file(file))
aspeed_video_start(video);
mutex_unlock(&video->video_lock);
return 0;
}
static int aspeed_video_release(struct file *file)
{
int rc;
struct aspeed_video *video = video_drvdata(file);
mutex_lock(&video->video_lock);
if (v4l2_fh_is_singular_file(file))
aspeed_video_stop(video);
rc = _vb2_fop_release(file, NULL);
mutex_unlock(&video->video_lock);
return rc;
}
static const struct v4l2_file_operations aspeed_video_v4l2_fops = {
.owner = THIS_MODULE,
.read = vb2_fop_read,
.poll = vb2_fop_poll,
.unlocked_ioctl = video_ioctl2,
.mmap = vb2_fop_mmap,
.open = aspeed_video_open,
.release = aspeed_video_release,
};
static int aspeed_video_queue_setup(struct vb2_queue *q,
unsigned int *num_buffers,
unsigned int *num_planes,
unsigned int sizes[],
struct device *alloc_devs[])
{
struct aspeed_video *video = vb2_get_drv_priv(q);
if (*num_planes) {
if (sizes[0] < video->max_compressed_size)
return -EINVAL;
return 0;
}
*num_planes = 1;
sizes[0] = video->max_compressed_size;
return 0;
}
static int aspeed_video_buf_prepare(struct vb2_buffer *vb)
{
struct aspeed_video *video = vb2_get_drv_priv(vb->vb2_queue);
if (vb2_plane_size(vb, 0) < video->max_compressed_size)
return -EINVAL;
return 0;
}
static int aspeed_video_start_streaming(struct vb2_queue *q,
unsigned int count)
{
int rc;
struct aspeed_video *video = vb2_get_drv_priv(q);
video->sequence = 0;
video->perf.duration_max = 0;
video->perf.duration_min = 0xffffffff;
rc = aspeed_video_start_frame(video);
if (rc) {
aspeed_video_bufs_done(video, VB2_BUF_STATE_QUEUED);
return rc;
}
set_bit(VIDEO_STREAMING, &video->flags);
return 0;
}
static void aspeed_video_stop_streaming(struct vb2_queue *q)
{
int rc;
struct aspeed_video *video = vb2_get_drv_priv(q);
clear_bit(VIDEO_STREAMING, &video->flags);
rc = wait_event_timeout(video->wait,
!test_bit(VIDEO_FRAME_INPRG, &video->flags),
STOP_TIMEOUT);
if (!rc) {
dev_dbg(video->dev, "Timed out when stopping streaming\n");
/*
* Need to force stop any DMA and try and get HW into a good
* state for future calls to start streaming again.
*/
aspeed_video_off(video);
aspeed_video_on(video);
aspeed_video_init_regs(video);
aspeed_video_get_resolution(video);
}
aspeed_video_bufs_done(video, VB2_BUF_STATE_ERROR);
}
static void aspeed_video_buf_queue(struct vb2_buffer *vb)
{
bool empty;
struct aspeed_video *video = vb2_get_drv_priv(vb->vb2_queue);
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct aspeed_video_buffer *avb = to_aspeed_video_buffer(vbuf);
unsigned long flags;
spin_lock_irqsave(&video->lock, flags);
empty = list_empty(&video->buffers);
list_add_tail(&avb->link, &video->buffers);
spin_unlock_irqrestore(&video->lock, flags);
if (test_bit(VIDEO_STREAMING, &video->flags) &&
!test_bit(VIDEO_FRAME_INPRG, &video->flags) && empty)
aspeed_video_start_frame(video);
}
static const struct vb2_ops aspeed_video_vb2_ops = {
.queue_setup = aspeed_video_queue_setup,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
.buf_prepare = aspeed_video_buf_prepare,
.start_streaming = aspeed_video_start_streaming,
.stop_streaming = aspeed_video_stop_streaming,
.buf_queue = aspeed_video_buf_queue,
};
#ifdef CONFIG_DEBUG_FS
static int aspeed_video_debugfs_show(struct seq_file *s, void *data)
{
struct aspeed_video *v = s->private;
seq_puts(s, "\n");
seq_printf(s, " %-20s:\t%s\n", "Signal",
v->v4l2_input_status ? "Unlock" : "Lock");
seq_printf(s, " %-20s:\t%d\n", "Width", v->pix_fmt.width);
seq_printf(s, " %-20s:\t%d\n", "Height", v->pix_fmt.height);
seq_printf(s, " %-20s:\t%d\n", "FRC", v->frame_rate);
seq_puts(s, "\n");
seq_puts(s, "Performance:\n");
seq_printf(s, " %-20s:\t%d\n", "Frame#", v->sequence);
seq_printf(s, " %-20s:\n", "Frame Duration(ms)");
seq_printf(s, " %-18s:\t%d\n", "Now", v->perf.duration);
seq_printf(s, " %-18s:\t%d\n", "Min", v->perf.duration_min);
seq_printf(s, " %-18s:\t%d\n", "Max", v->perf.duration_max);
seq_printf(s, " %-20s:\t%d\n", "FPS", 1000 / (v->perf.totaltime / v->sequence));
return 0;
}
static int aspeed_video_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, aspeed_video_debugfs_show, inode->i_private);
}
static const struct file_operations aspeed_video_debugfs_ops = {
.owner = THIS_MODULE,
.open = aspeed_video_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static struct dentry *debugfs_entry;
static void aspeed_video_debugfs_remove(struct aspeed_video *video)
{
debugfs_remove_recursive(debugfs_entry);
debugfs_entry = NULL;
}
static int aspeed_video_debugfs_create(struct aspeed_video *video)
{
debugfs_entry = debugfs_create_file(DEVICE_NAME, 0444, NULL,
video,
&aspeed_video_debugfs_ops);
if (!debugfs_entry)
aspeed_video_debugfs_remove(video);
return !debugfs_entry ? -EIO : 0;
}
#else
static void aspeed_video_debugfs_remove(struct aspeed_video *video) { }
static int aspeed_video_debugfs_create(struct aspeed_video *video)
{
return 0;
}
#endif /* CONFIG_DEBUG_FS */
static int aspeed_video_setup_video(struct aspeed_video *video)
{
const u64 mask = ~(BIT(V4L2_JPEG_CHROMA_SUBSAMPLING_444) |
BIT(V4L2_JPEG_CHROMA_SUBSAMPLING_420));
struct v4l2_device *v4l2_dev = &video->v4l2_dev;
struct vb2_queue *vbq = &video->queue;
struct video_device *vdev = &video->vdev;
int rc;
video->pix_fmt.pixelformat = V4L2_PIX_FMT_JPEG;
video->pix_fmt.field = V4L2_FIELD_NONE;
video->pix_fmt.colorspace = V4L2_COLORSPACE_SRGB;
video->pix_fmt.quantization = V4L2_QUANTIZATION_FULL_RANGE;
video->v4l2_input_status = V4L2_IN_ST_NO_SIGNAL;
rc = v4l2_device_register(video->dev, v4l2_dev);
if (rc) {
dev_err(video->dev, "Failed to register v4l2 device\n");
return rc;
}
v4l2_ctrl_handler_init(&video->ctrl_handler, 2);
v4l2_ctrl_new_std(&video->ctrl_handler, &aspeed_video_ctrl_ops,
V4L2_CID_JPEG_COMPRESSION_QUALITY, 0,
ASPEED_VIDEO_JPEG_NUM_QUALITIES - 1, 1, 0);
v4l2_ctrl_new_std_menu(&video->ctrl_handler, &aspeed_video_ctrl_ops,
V4L2_CID_JPEG_CHROMA_SUBSAMPLING,
V4L2_JPEG_CHROMA_SUBSAMPLING_420, mask,
V4L2_JPEG_CHROMA_SUBSAMPLING_444);
rc = video->ctrl_handler.error;
if (rc) {
v4l2_ctrl_handler_free(&video->ctrl_handler);
v4l2_device_unregister(v4l2_dev);
dev_err(video->dev, "Failed to init controls: %d\n", rc);
return rc;
}
v4l2_dev->ctrl_handler = &video->ctrl_handler;
vbq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
vbq->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF;
vbq->dev = v4l2_dev->dev;
vbq->lock = &video->video_lock;
vbq->ops = &aspeed_video_vb2_ops;
vbq->mem_ops = &vb2_dma_contig_memops;
vbq->drv_priv = video;
vbq->buf_struct_size = sizeof(struct aspeed_video_buffer);
vbq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
vbq->min_buffers_needed = 3;
rc = vb2_queue_init(vbq);
if (rc) {
v4l2_ctrl_handler_free(&video->ctrl_handler);
v4l2_device_unregister(v4l2_dev);
dev_err(video->dev, "Failed to init vb2 queue\n");
return rc;
}
vdev->queue = vbq;
vdev->fops = &aspeed_video_v4l2_fops;
vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
V4L2_CAP_STREAMING;
vdev->v4l2_dev = v4l2_dev;
strscpy(vdev->name, DEVICE_NAME, sizeof(vdev->name));
vdev->vfl_type = VFL_TYPE_VIDEO;
vdev->vfl_dir = VFL_DIR_RX;
vdev->release = video_device_release_empty;
vdev->ioctl_ops = &aspeed_video_ioctl_ops;
vdev->lock = &video->video_lock;
video_set_drvdata(vdev, video);
rc = video_register_device(vdev, VFL_TYPE_VIDEO, 0);
if (rc) {
v4l2_ctrl_handler_free(&video->ctrl_handler);
v4l2_device_unregister(v4l2_dev);
dev_err(video->dev, "Failed to register video device\n");
return rc;
}
return 0;
}
static int aspeed_video_init(struct aspeed_video *video)
{
int irq;
int rc;
struct device *dev = video->dev;
irq = irq_of_parse_and_map(dev->of_node, 0);
if (!irq) {
dev_err(dev, "Unable to find IRQ\n");
return -ENODEV;
}
rc = devm_request_threaded_irq(dev, irq, NULL, aspeed_video_irq,
IRQF_ONESHOT, DEVICE_NAME, video);
if (rc < 0) {
dev_err(dev, "Unable to request IRQ %d\n", irq);
return rc;
}
video->eclk = devm_clk_get(dev, "eclk");
if (IS_ERR(video->eclk)) {
dev_err(dev, "Unable to get ECLK\n");
return PTR_ERR(video->eclk);
}
rc = clk_prepare(video->eclk);
if (rc)
return rc;
video->vclk = devm_clk_get(dev, "vclk");
if (IS_ERR(video->vclk)) {
dev_err(dev, "Unable to get VCLK\n");
rc = PTR_ERR(video->vclk);
goto err_unprepare_eclk;
}
rc = clk_prepare(video->vclk);
if (rc)
goto err_unprepare_eclk;
of_reserved_mem_device_init(dev);
rc = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
if (rc) {
dev_err(dev, "Failed to set DMA mask\n");
goto err_release_reserved_mem;
}
if (!aspeed_video_alloc_buf(video, &video->jpeg,
VE_JPEG_HEADER_SIZE)) {
dev_err(dev, "Failed to allocate DMA for JPEG header\n");
rc = -ENOMEM;
goto err_release_reserved_mem;
}
aspeed_video_init_jpeg_table(video->jpeg.virt, video->yuv420);
return 0;
err_release_reserved_mem:
of_reserved_mem_device_release(dev);
clk_unprepare(video->vclk);
err_unprepare_eclk:
clk_unprepare(video->eclk);
return rc;
}
static const struct of_device_id aspeed_video_of_match[] = {
{ .compatible = "aspeed,ast2400-video-engine", .data = &ast2400_config },
{ .compatible = "aspeed,ast2500-video-engine", .data = &ast2500_config },
{ .compatible = "aspeed,ast2600-video-engine", .data = &ast2600_config },
{}
};
MODULE_DEVICE_TABLE(of, aspeed_video_of_match);
static int aspeed_video_probe(struct platform_device *pdev)
{
const struct aspeed_video_config *config;
const struct of_device_id *match;
struct aspeed_video *video;
int rc;
video = devm_kzalloc(&pdev->dev, sizeof(*video), GFP_KERNEL);
if (!video)
return -ENOMEM;
video->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(video->base))
return PTR_ERR(video->base);
match = of_match_node(aspeed_video_of_match, pdev->dev.of_node);
if (!match)
return -EINVAL;
config = match->data;
video->jpeg_mode = config->jpeg_mode;
video->comp_size_read = config->comp_size_read;
video->frame_rate = 30;
video->dev = &pdev->dev;
spin_lock_init(&video->lock);
mutex_init(&video->video_lock);
init_waitqueue_head(&video->wait);
INIT_DELAYED_WORK(&video->res_work, aspeed_video_resolution_work);
INIT_LIST_HEAD(&video->buffers);
rc = aspeed_video_init(video);
if (rc)
return rc;
rc = aspeed_video_setup_video(video);
if (rc) {
clk_unprepare(video->vclk);
clk_unprepare(video->eclk);
return rc;
}
rc = aspeed_video_debugfs_create(video);
if (rc)
dev_err(video->dev, "debugfs create failed\n");
return 0;
}
static int aspeed_video_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct v4l2_device *v4l2_dev = dev_get_drvdata(dev);
struct aspeed_video *video = to_aspeed_video(v4l2_dev);
aspeed_video_off(video);
aspeed_video_debugfs_remove(video);
clk_unprepare(video->vclk);
clk_unprepare(video->eclk);
vb2_video_unregister_device(&video->vdev);
v4l2_ctrl_handler_free(&video->ctrl_handler);
v4l2_device_unregister(v4l2_dev);
dma_free_coherent(video->dev, VE_JPEG_HEADER_SIZE, video->jpeg.virt,
video->jpeg.dma);
of_reserved_mem_device_release(dev);
return 0;
}
static struct platform_driver aspeed_video_driver = {
.driver = {
.name = DEVICE_NAME,
.of_match_table = aspeed_video_of_match,
},
.probe = aspeed_video_probe,
.remove = aspeed_video_remove,
};
module_platform_driver(aspeed_video_driver);
MODULE_DESCRIPTION("ASPEED Video Engine Driver");
MODULE_AUTHOR("Eddie James");
MODULE_LICENSE("GPL v2");
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