#include <linux/atomic.h>
#include <linux/bitfield.h>
#include <linux/bitmap.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/mfd/syscon.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/of_reserved_mem.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/v4l2-controls.h>
#include <linux/videodev2.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>
#include <uapi/linux/npcm-video.h>
#include "npcm-regs.h"
#define DEVICE_NAME "npcm-video"
#define MAX_WIDTH 1920
#define MAX_HEIGHT 1200
#define MIN_WIDTH 320
#define MIN_HEIGHT 240
#define MIN_LP 512
#define MAX_LP 4096
#define RECT_W 16
#define RECT_H 16
#define BITMAP_SIZE 32
struct npcm_video_addr {
size_t size;
dma_addr_t dma;
void *virt;
};
struct npcm_video_buffer {
struct vb2_v4l2_buffer vb;
struct list_head link;
};
#define to_npcm_video_buffer(x) \
container_of((x), struct npcm_video_buffer, vb)
enum {
VIDEO_STREAMING,
VIDEO_CAPTURING,
VIDEO_RES_CHANGING,
VIDEO_STOPPED,
};
struct rect_list {
struct v4l2_clip clip;
struct list_head list;
};
struct rect_list_info {
struct rect_list *list;
struct rect_list *first;
struct list_head *head;
unsigned int index;
unsigned int tile_perline;
unsigned int tile_perrow;
unsigned int offset_perline;
unsigned int tile_size;
unsigned int tile_cnt;
};
struct npcm_ece {
struct regmap *regmap;
atomic_t clients;
struct reset_control *reset;
bool enable;
};
struct npcm_video {
struct regmap *gcr_regmap;
struct regmap *gfx_regmap;
struct regmap *vcd_regmap;
struct device *dev;
struct v4l2_ctrl_handler ctrl_handler;
struct v4l2_ctrl *rect_cnt_ctrl;
struct v4l2_device v4l2_dev;
struct v4l2_pix_format pix_fmt;
struct v4l2_bt_timings active_timings;
struct v4l2_bt_timings detected_timings;
unsigned int v4l2_input_status;
struct vb2_queue queue;
struct video_device vdev;
struct mutex video_lock;
struct list_head buffers;
struct mutex buffer_lock;
unsigned long flags;
unsigned int sequence;
struct npcm_video_addr src;
struct reset_control *reset;
struct npcm_ece ece;
unsigned int bytesperline;
unsigned int bytesperpixel;
unsigned int rect_cnt;
struct list_head list[VIDEO_MAX_FRAME];
unsigned int rect[VIDEO_MAX_FRAME];
unsigned int ctrl_cmd;
unsigned int op_cmd;
};
#define to_npcm_video(x) container_of((x), struct npcm_video, v4l2_dev)
struct npcm_fmt {
unsigned int fourcc;
unsigned int bpp;
};
static const struct npcm_fmt npcm_fmt_list[] = {
{
.fourcc = V4L2_PIX_FMT_RGB565,
.bpp = 2,
},
{
.fourcc = V4L2_PIX_FMT_HEXTILE,
.bpp = 2,
},
};
#define NUM_FORMATS ARRAY_SIZE(npcm_fmt_list)
static const struct v4l2_dv_timings_cap npcm_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,
.max_pixelclock = 138240000,
.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 DECLARE_BITMAP(bitmap, BITMAP_SIZE);
static const struct npcm_fmt *npcm_video_find_format(struct v4l2_format *f)
{
const struct npcm_fmt *fmt;
unsigned int k;
for (k = 0; k < NUM_FORMATS; k++) {
fmt = &npcm_fmt_list[k];
if (fmt->fourcc == f->fmt.pix.pixelformat)
break;
}
if (k == NUM_FORMATS)
return NULL;
return &npcm_fmt_list[k];
}
static void npcm_video_ece_prepend_rect_header(void *addr, u16 x, u16 y, u16 w, u16 h)
{
__be16 x_pos = cpu_to_be16(x);
__be16 y_pos = cpu_to_be16(y);
__be16 width = cpu_to_be16(w);
__be16 height = cpu_to_be16(h);
__be32 encoding = cpu_to_be32(5);
memcpy(addr, &x_pos, 2);
memcpy(addr + 2, &y_pos, 2);
memcpy(addr + 4, &width, 2);
memcpy(addr + 6, &height, 2);
memcpy(addr + 8, &encoding, 4);
}
static unsigned int npcm_video_ece_get_ed_size(struct npcm_video *video,
unsigned int offset, void *addr)
{
struct regmap *ece = video->ece.regmap;
unsigned int size, gap, val;
int ret;
ret = regmap_read_poll_timeout(ece, ECE_DDA_STS, val,
(val & ECE_DDA_STS_CDREADY), 0,
ECE_POLL_TIMEOUT_US);
if (ret) {
dev_warn(video->dev, "Wait for ECE_DDA_STS_CDREADY timeout\n");
return 0;
}
size = readl((void __iomem *)addr + offset);
regmap_read(ece, ECE_HEX_CTRL, &val);
gap = FIELD_GET(ECE_HEX_CTRL_ENC_GAP, val);
dev_dbg(video->dev, "offset = %u, ed_size = %u, gap = %u\n", offset,
size, gap);
return size + gap;
}
static void npcm_video_ece_enc_rect(struct npcm_video *video,
unsigned int r_off_x, unsigned int r_off_y,
unsigned int r_w, unsigned int r_h)
{
struct regmap *ece = video->ece.regmap;
unsigned int rect_offset = (r_off_y * video->bytesperline) + (r_off_x * 2);
unsigned int w_size = ECE_TILE_W, h_size = ECE_TILE_H;
unsigned int temp, w_tile, h_tile;
regmap_update_bits(ece, ECE_DDA_CTRL, ECE_DDA_CTRL_ECEEN, 0);
regmap_update_bits(ece, ECE_DDA_CTRL, ECE_DDA_CTRL_ECEEN, ECE_DDA_CTRL_ECEEN);
regmap_write(ece, ECE_DDA_STS, ECE_DDA_STS_CDREADY | ECE_DDA_STS_ACDRDY);
regmap_write(ece, ECE_RECT_XY, rect_offset);
w_tile = r_w / ECE_TILE_W;
h_tile = r_h / ECE_TILE_H;
if (r_w % ECE_TILE_W) {
w_tile += 1;
w_size = r_w % ECE_TILE_W;
}
if (r_h % ECE_TILE_H || !h_tile) {
h_tile += 1;
h_size = r_h % ECE_TILE_H;
}
temp = FIELD_PREP(ECE_RECT_DIMEN_WLTR, w_size - 1) |
FIELD_PREP(ECE_RECT_DIMEN_HLTR, h_size - 1) |
FIELD_PREP(ECE_RECT_DIMEN_WR, w_tile - 1) |
FIELD_PREP(ECE_RECT_DIMEN_HR, h_tile - 1);
regmap_write(ece, ECE_RECT_DIMEN, temp);
}
static unsigned int npcm_video_ece_read_rect_offset(struct npcm_video *video)
{
struct regmap *ece = video->ece.regmap;
unsigned int offset;
regmap_read(ece, ECE_HEX_RECT_OFFSET, &offset);
return FIELD_GET(ECE_HEX_RECT_OFFSET_MASK, offset);
}
static void npcm_video_ece_set_lp(struct npcm_video *video, unsigned int pitch)
{
struct regmap *ece = video->ece.regmap;
unsigned int lp;
switch (pitch) {
case 512:
lp = ECE_RESOL_FB_LP_512;
break;
case 1024:
lp = ECE_RESOL_FB_LP_1024;
break;
case 2048:
lp = ECE_RESOL_FB_LP_2048;
break;
case 2560:
lp = ECE_RESOL_FB_LP_2560;
break;
case 4096:
lp = ECE_RESOL_FB_LP_4096;
break;
default:
return;
}
regmap_write(ece, ECE_RESOL, lp);
}
static inline void npcm_video_ece_set_fb_addr(struct npcm_video *video,
unsigned int buffer)
{
struct regmap *ece = video->ece.regmap;
regmap_write(ece, ECE_FBR_BA, buffer);
}
static inline void npcm_video_ece_set_enc_dba(struct npcm_video *video,
unsigned int addr)
{
struct regmap *ece = video->ece.regmap;
regmap_write(ece, ECE_ED_BA, addr);
}
static inline void npcm_video_ece_clear_rect_offset(struct npcm_video *video)
{
struct regmap *ece = video->ece.regmap;
regmap_write(ece, ECE_HEX_RECT_OFFSET, 0);
}
static void npcm_video_ece_ctrl_reset(struct npcm_video *video)
{
struct regmap *ece = video->ece.regmap;
regmap_update_bits(ece, ECE_DDA_CTRL, ECE_DDA_CTRL_ECEEN, 0);
regmap_update_bits(ece, ECE_HEX_CTRL, ECE_HEX_CTRL_ENCDIS, ECE_HEX_CTRL_ENCDIS);
regmap_update_bits(ece, ECE_DDA_CTRL, ECE_DDA_CTRL_ECEEN, ECE_DDA_CTRL_ECEEN);
regmap_update_bits(ece, ECE_HEX_CTRL, ECE_HEX_CTRL_ENCDIS, 0);
npcm_video_ece_clear_rect_offset(video);
}
static void npcm_video_ece_ip_reset(struct npcm_video *video)
{
reset_control_assert(video->ece.reset);
usleep_range(10, 20);
reset_control_deassert(video->ece.reset);
usleep_range(10, 20);
}
static void npcm_video_ece_stop(struct npcm_video *video)
{
struct regmap *ece = video->ece.regmap;
regmap_update_bits(ece, ECE_DDA_CTRL, ECE_DDA_CTRL_ECEEN, 0);
regmap_update_bits(ece, ECE_DDA_CTRL, ECE_DDA_CTRL_INTEN, 0);
regmap_update_bits(ece, ECE_HEX_CTRL, ECE_HEX_CTRL_ENCDIS, ECE_HEX_CTRL_ENCDIS);
npcm_video_ece_clear_rect_offset(video);
}
static bool npcm_video_alloc_fb(struct npcm_video *video,
struct npcm_video_addr *addr)
{
addr->virt = dma_alloc_coherent(video->dev, VCD_FB_SIZE, &addr->dma,
GFP_KERNEL);
if (!addr->virt)
return false;
addr->size = VCD_FB_SIZE;
return true;
}
static void npcm_video_free_fb(struct npcm_video *video,
struct npcm_video_addr *addr)
{
dma_free_coherent(video->dev, addr->size, addr->virt, addr->dma);
addr->size = 0;
addr->dma = 0ULL;
addr->virt = NULL;
}
static void npcm_video_free_diff_table(struct npcm_video *video)
{
struct list_head *head, *pos, *nx;
struct rect_list *tmp;
unsigned int i;
for (i = 0; i < vb2_get_num_buffers(&video->queue); i++) {
head = &video->list[i];
list_for_each_safe(pos, nx, head) {
tmp = list_entry(pos, struct rect_list, list);
list_del(&tmp->list);
kfree(tmp);
}
}
}
static unsigned int npcm_video_add_rect(struct npcm_video *video,
unsigned int index,
unsigned int x, unsigned int y,
unsigned int w, unsigned int h)
{
struct list_head *head = &video->list[index];
struct rect_list *list = NULL;
struct v4l2_rect *r;
list = kzalloc_obj(*list);
if (!list)
return 0;
r = &list->clip.c;
r->left = x;
r->top = y;
r->width = w;
r->height = h;
list_add_tail(&list->list, head);
return 1;
}
static void npcm_video_merge_rect(struct npcm_video *video,
struct rect_list_info *info)
{
struct list_head *head = info->head;
struct rect_list *list = info->list, *first = info->first;
struct v4l2_rect *r = &list->clip.c, *f = &first->clip.c;
if (!first) {
first = list;
info->first = first;
list_add_tail(&list->list, head);
video->rect_cnt++;
} else {
if ((r->left == (f->left + f->width)) && r->top == f->top) {
f->width += r->width;
kfree(list);
} else if ((r->top == (f->top + f->height)) &&
(r->left == f->left)) {
f->height += r->height;
kfree(list);
} else if (((r->top > f->top) &&
(r->top < (f->top + f->height))) &&
((r->left > f->left) &&
(r->left < (f->left + f->width)))) {
kfree(list);
} else {
list_add_tail(&list->list, head);
video->rect_cnt++;
info->first = list;
}
}
}
static struct rect_list *npcm_video_new_rect(struct npcm_video *video,
unsigned int offset,
unsigned int index)
{
struct v4l2_bt_timings *act = &video->active_timings;
struct rect_list *list = NULL;
struct v4l2_rect *r;
list = kzalloc_obj(*list);
if (!list)
return NULL;
r = &list->clip.c;
r->left = (offset << 4);
r->top = (index >> 2);
r->width = RECT_W;
r->height = RECT_H;
if ((r->left + RECT_W) > act->width)
r->width = act->width - r->left;
if ((r->top + RECT_H) > act->height)
r->height = act->height - r->top;
return list;
}
static int npcm_video_find_rect(struct npcm_video *video,
struct rect_list_info *info,
unsigned int offset)
{
if (offset < info->tile_perline) {
info->list = npcm_video_new_rect(video, offset, info->index);
if (!info->list) {
dev_err(video->dev, "Failed to allocate rect_list\n");
return -ENOMEM;
}
npcm_video_merge_rect(video, info);
}
return 0;
}
static int npcm_video_build_table(struct npcm_video *video,
struct rect_list_info *info)
{
struct regmap *vcd = video->vcd_regmap;
unsigned int j, bit, value;
int ret;
for (j = 0; j < info->offset_perline; j += 4) {
regmap_read(vcd, VCD_DIFF_TBL + (j + info->index), &value);
bitmap_from_arr32(bitmap, &value, BITMAP_SIZE);
for_each_set_bit(bit, bitmap, BITMAP_SIZE) {
ret = npcm_video_find_rect(video, info, bit + (j << 3));
if (ret)
return ret;
}
}
info->index += 64;
return info->tile_perline;
}
static void npcm_video_get_rect_list(struct npcm_video *video, unsigned int index)
{
struct v4l2_bt_timings *act = &video->active_timings;
struct rect_list_info info;
unsigned int tile_cnt = 0, mod;
int ret = 0;
memset(&info, 0, sizeof(struct rect_list_info));
info.head = &video->list[index];
info.tile_perline = act->width >> 4;
mod = act->width % RECT_W;
if (mod != 0)
info.tile_perline += 1;
info.tile_perrow = act->height >> 4;
mod = act->height % RECT_H;
if (mod != 0)
info.tile_perrow += 1;
info.tile_size = info.tile_perrow * info.tile_perline;
info.offset_perline = info.tile_perline >> 5;
mod = info.tile_perline % 32;
if (mod != 0)
info.offset_perline += 1;
info.offset_perline *= 4;
do {
ret = npcm_video_build_table(video, &info);
if (ret < 0)
return;
tile_cnt += ret;
} while (tile_cnt < info.tile_size);
}
static unsigned int npcm_video_is_mga(struct npcm_video *video)
{
struct regmap *gfxi = video->gfx_regmap;
unsigned int dispst;
regmap_read(gfxi, DISPST, &dispst);
return ((dispst & DISPST_MGAMODE) == DISPST_MGAMODE);
}
static unsigned int npcm_video_hres(struct npcm_video *video)
{
struct regmap *gfxi = video->gfx_regmap;
unsigned int hvcnth, hvcntl, apb_hor_res;
regmap_read(gfxi, HVCNTH, &hvcnth);
regmap_read(gfxi, HVCNTL, &hvcntl);
apb_hor_res = (((hvcnth & HVCNTH_MASK) << 8) + (hvcntl & HVCNTL_MASK) + 1);
return (apb_hor_res > MAX_WIDTH) ? MAX_WIDTH : apb_hor_res;
}
static unsigned int npcm_video_vres(struct npcm_video *video)
{
struct regmap *gfxi = video->gfx_regmap;
unsigned int vvcnth, vvcntl, apb_ver_res;
regmap_read(gfxi, VVCNTH, &vvcnth);
regmap_read(gfxi, VVCNTL, &vvcntl);
apb_ver_res = (((vvcnth & VVCNTH_MASK) << 8) + (vvcntl & VVCNTL_MASK));
return (apb_ver_res > MAX_HEIGHT) ? MAX_HEIGHT : apb_ver_res;
}
static int npcm_video_capres(struct npcm_video *video, unsigned int hor_res,
unsigned int vert_res)
{
struct regmap *vcd = video->vcd_regmap;
unsigned int res, cap_res;
if (hor_res > MAX_WIDTH || vert_res > MAX_HEIGHT)
return -EINVAL;
res = FIELD_PREP(VCD_CAP_RES_VERT_RES, vert_res) |
FIELD_PREP(VCD_CAP_RES_HOR_RES, hor_res);
regmap_write(vcd, VCD_CAP_RES, res);
regmap_read(vcd, VCD_CAP_RES, &cap_res);
if (cap_res != res)
return -EINVAL;
return 0;
}
static void npcm_video_vcd_ip_reset(struct npcm_video *video)
{
reset_control_assert(video->reset);
usleep_range(10, 20);
reset_control_deassert(video->reset);
usleep_range(10, 20);
}
static void npcm_video_vcd_state_machine_reset(struct npcm_video *video)
{
struct regmap *vcd = video->vcd_regmap;
regmap_update_bits(vcd, VCD_MODE, VCD_MODE_VCDE, 0);
regmap_update_bits(vcd, VCD_MODE, VCD_MODE_IDBC, 0);
regmap_update_bits(vcd, VCD_CMD, VCD_CMD_RST, VCD_CMD_RST);
usleep_range(800, 1000);
regmap_write(vcd, VCD_STAT, VCD_STAT_CLEAR);
regmap_update_bits(vcd, VCD_MODE, VCD_MODE_VCDE, VCD_MODE_VCDE);
regmap_update_bits(vcd, VCD_MODE, VCD_MODE_IDBC, VCD_MODE_IDBC);
}
static void npcm_video_gfx_reset(struct npcm_video *video)
{
struct regmap *gcr = video->gcr_regmap;
regmap_update_bits(gcr, INTCR2, INTCR2_GIRST2, INTCR2_GIRST2);
npcm_video_vcd_state_machine_reset(video);
regmap_update_bits(gcr, INTCR2, INTCR2_GIRST2, 0);
}
static void npcm_video_kvm_bw(struct npcm_video *video, bool set_bw)
{
struct regmap *vcd = video->vcd_regmap;
if (set_bw || !npcm_video_is_mga(video))
regmap_update_bits(vcd, VCD_MODE, VCD_MODE_KVM_BW_SET,
VCD_MODE_KVM_BW_SET);
else
regmap_update_bits(vcd, VCD_MODE, VCD_MODE_KVM_BW_SET, 0);
}
static unsigned int npcm_video_pclk(struct npcm_video *video)
{
struct regmap *gfxi = video->gfx_regmap;
unsigned int tmp, pllfbdiv, pllinotdiv, gpllfbdiv;
unsigned int gpllfbdv109, gpllfbdv8, gpllindiv;
unsigned int gpllst_pllotdiv1, gpllst_pllotdiv2;
regmap_read(gfxi, GPLLST, &tmp);
gpllfbdv109 = FIELD_GET(GPLLST_GPLLFBDV109, tmp);
gpllst_pllotdiv1 = FIELD_GET(GPLLST_PLLOTDIV1, tmp);
gpllst_pllotdiv2 = FIELD_GET(GPLLST_PLLOTDIV2, tmp);
regmap_read(gfxi, GPLLINDIV, &tmp);
gpllfbdv8 = FIELD_GET(GPLLINDIV_GPLLFBDV8, tmp);
gpllindiv = FIELD_GET(GPLLINDIV_MASK, tmp);
regmap_read(gfxi, GPLLFBDIV, &tmp);
gpllfbdiv = FIELD_GET(GPLLFBDIV_MASK, tmp);
pllfbdiv = (512 * gpllfbdv109 + 256 * gpllfbdv8 + gpllfbdiv);
pllinotdiv = (gpllindiv * gpllst_pllotdiv1 * gpllst_pllotdiv2);
if (pllfbdiv == 0 || pllinotdiv == 0)
return 0;
return ((pllfbdiv * 25000) / pllinotdiv) * 1000;
}
static unsigned int npcm_video_get_bpp(struct npcm_video *video)
{
const struct npcm_fmt *fmt;
unsigned int k;
for (k = 0; k < NUM_FORMATS; k++) {
fmt = &npcm_fmt_list[k];
if (fmt->fourcc == video->pix_fmt.pixelformat)
break;
}
return fmt->bpp;
}
static void npcm_video_set_linepitch(struct npcm_video *video,
unsigned int linebytes)
{
struct regmap *vcd = video->vcd_regmap;
unsigned int pitch = MIN_LP;
while ((pitch < linebytes) && (pitch < MAX_LP))
pitch *= 2;
regmap_write(vcd, VCD_FB_LP, FIELD_PREP(VCD_FBA_LP, pitch) |
FIELD_PREP(VCD_FBB_LP, pitch));
}
static unsigned int npcm_video_get_linepitch(struct npcm_video *video)
{
struct regmap *vcd = video->vcd_regmap;
unsigned int linepitch;
regmap_read(vcd, VCD_FB_LP, &linepitch);
return FIELD_GET(VCD_FBA_LP, linepitch);
}
static void npcm_video_command(struct npcm_video *video, unsigned int value)
{
struct regmap *vcd = video->vcd_regmap;
unsigned int cmd;
regmap_write(vcd, VCD_STAT, VCD_STAT_CLEAR);
regmap_read(vcd, VCD_CMD, &cmd);
cmd |= FIELD_PREP(VCD_CMD_OPERATION, value);
regmap_write(vcd, VCD_CMD, cmd);
regmap_update_bits(vcd, VCD_CMD, VCD_CMD_GO, VCD_CMD_GO);
video->op_cmd = value;
}
static void npcm_video_init_reg(struct npcm_video *video)
{
struct regmap *gcr = video->gcr_regmap, *vcd = video->vcd_regmap;
regmap_update_bits(gcr, INTCR, INTCR_DEHS, 0);
regmap_update_bits(gcr, INTCR, INTCR_GFXIFDIS, 0);
regmap_update_bits(gcr, INTCR2, INTCR2_GIHCRST | INTCR2_GIVCRST,
INTCR2_GIHCRST | INTCR2_GIVCRST);
npcm_video_vcd_ip_reset(video);
npcm_video_gfx_reset(video);
regmap_write(vcd, VCD_FIFO, VCD_FIFO_TH);
regmap_write(vcd, VCD_RCHG, FIELD_PREP(VCD_RCHG_TIM_PRSCL, 0xf) |
FIELD_PREP(VCD_RCHG_IG_CHG0, 0x3));
regmap_write(vcd, VCD_MODE, VCD_MODE_VCDE | VCD_MODE_CM565 |
VCD_MODE_IDBC | VCD_MODE_KVM_BW_SET);
}
static int npcm_video_start_frame(struct npcm_video *video)
{
struct npcm_video_buffer *buf;
struct regmap *vcd = video->vcd_regmap;
unsigned int val;
int ret;
if (video->v4l2_input_status) {
dev_dbg(video->dev, "No video signal; skip capture frame\n");
return 0;
}
ret = regmap_read_poll_timeout(vcd, VCD_STAT, val, !(val & VCD_STAT_BUSY),
1000, VCD_TIMEOUT_US);
if (ret) {
dev_err(video->dev, "Wait for VCD_STAT_BUSY timeout\n");
return -EBUSY;
}
mutex_lock(&video->buffer_lock);
buf = list_first_entry_or_null(&video->buffers,
struct npcm_video_buffer, link);
if (!buf) {
mutex_unlock(&video->buffer_lock);
dev_dbg(video->dev, "No empty buffers; skip capture frame\n");
return 0;
}
set_bit(VIDEO_CAPTURING, &video->flags);
mutex_unlock(&video->buffer_lock);
npcm_video_vcd_state_machine_reset(video);
regmap_read(vcd, VCD_HOR_AC_TIM, &val);
regmap_update_bits(vcd, VCD_HOR_AC_LST, VCD_HOR_AC_LAST,
FIELD_GET(VCD_HOR_AC_TIME, val));
regmap_read(vcd, VCD_VER_HI_TIM, &val);
regmap_update_bits(vcd, VCD_VER_HI_LST, VCD_VER_HI_LAST,
FIELD_GET(VCD_VER_HI_TIME, val));
regmap_update_bits(vcd, VCD_INTE, VCD_INTE_DONE_IE | VCD_INTE_IFOT_IE |
VCD_INTE_IFOR_IE | VCD_INTE_HAC_IE | VCD_INTE_VHT_IE,
VCD_INTE_DONE_IE | VCD_INTE_IFOT_IE | VCD_INTE_IFOR_IE |
VCD_INTE_HAC_IE | VCD_INTE_VHT_IE);
npcm_video_command(video, video->ctrl_cmd);
return 0;
}
static void npcm_video_bufs_done(struct npcm_video *video,
enum vb2_buffer_state state)
{
struct npcm_video_buffer *buf;
mutex_lock(&video->buffer_lock);
list_for_each_entry(buf, &video->buffers, link)
vb2_buffer_done(&buf->vb.vb2_buf, state);
INIT_LIST_HEAD(&video->buffers);
mutex_unlock(&video->buffer_lock);
}
static void npcm_video_get_diff_rect(struct npcm_video *video, unsigned int index)
{
unsigned int width = video->active_timings.width;
unsigned int height = video->active_timings.height;
if (video->op_cmd != VCD_CMD_OPERATION_CAPTURE) {
video->rect_cnt = 0;
npcm_video_get_rect_list(video, index);
video->rect[index] = video->rect_cnt;
} else {
video->rect[index] = npcm_video_add_rect(video, index, 0, 0,
width, height);
}
}
static void npcm_video_detect_resolution(struct npcm_video *video)
{
struct v4l2_bt_timings *act = &video->active_timings;
struct v4l2_bt_timings *det = &video->detected_timings;
struct regmap *gfxi = video->gfx_regmap;
unsigned int dispst;
det->width = npcm_video_hres(video);
det->height = npcm_video_vres(video);
if (act->width != det->width || act->height != det->height) {
dev_dbg(video->dev, "Resolution changed\n");
if (npcm_video_hres(video) > 0 && npcm_video_vres(video) > 0) {
if (test_bit(VIDEO_STREAMING, &video->flags)) {
do {
mdelay(100);
regmap_read(gfxi, DISPST, &dispst);
} while (npcm_video_vres(video) < 100 ||
npcm_video_pclk(video) == 0 ||
(dispst & DISPST_HSCROFF));
}
det->width = npcm_video_hres(video);
det->height = npcm_video_vres(video);
det->pixelclock = npcm_video_pclk(video);
}
clear_bit(VIDEO_RES_CHANGING, &video->flags);
}
if (det->width && det->height) {
video->v4l2_input_status = 0;
dev_dbg(video->dev, "Got resolution[%dx%d] -> [%dx%d], status %d\n",
act->width, act->height, det->width, det->height,
video->v4l2_input_status);
} else {
video->v4l2_input_status = V4L2_IN_ST_NO_SIGNAL;
dev_err(video->dev, "Got invalid resolution[%dx%d]\n", det->width,
det->height);
}
}
static int npcm_video_set_resolution(struct npcm_video *video,
struct v4l2_bt_timings *timing)
{
struct regmap *vcd = video->vcd_regmap;
unsigned int mode;
if (npcm_video_capres(video, timing->width, timing->height)) {
dev_err(video->dev, "Failed to set VCD_CAP_RES\n");
return -EINVAL;
}
video->active_timings = *timing;
video->bytesperpixel = npcm_video_get_bpp(video);
npcm_video_set_linepitch(video, timing->width * video->bytesperpixel);
video->bytesperline = npcm_video_get_linepitch(video);
video->pix_fmt.width = timing->width ? timing->width : MIN_WIDTH;
video->pix_fmt.height = timing->height ? timing->height : MIN_HEIGHT;
video->pix_fmt.sizeimage = video->pix_fmt.width * video->pix_fmt.height *
video->bytesperpixel;
video->pix_fmt.bytesperline = video->bytesperline;
npcm_video_kvm_bw(video, timing->pixelclock > VCD_KVM_BW_PCLK);
npcm_video_gfx_reset(video);
regmap_read(vcd, VCD_MODE, &mode);
dev_dbg(video->dev, "VCD mode = 0x%x, %s mode\n", mode,
npcm_video_is_mga(video) ? "Hi Res" : "VGA");
dev_dbg(video->dev,
"Digital mode: %d x %d x %d, pixelclock %lld, bytesperline %d\n",
timing->width, timing->height, video->bytesperpixel,
timing->pixelclock, video->bytesperline);
return 0;
}
static void npcm_video_start(struct npcm_video *video)
{
npcm_video_init_reg(video);
if (!npcm_video_alloc_fb(video, &video->src)) {
dev_err(video->dev, "Failed to allocate VCD frame buffer\n");
return;
}
npcm_video_detect_resolution(video);
if (npcm_video_set_resolution(video, &video->detected_timings)) {
dev_err(video->dev, "Failed to set resolution\n");
return;
}
regmap_write(video->vcd_regmap, VCD_FBA_ADR, video->src.dma);
regmap_write(video->vcd_regmap, VCD_FBB_ADR, video->src.dma);
if (video->ece.enable && atomic_inc_return(&video->ece.clients) == 1) {
npcm_video_ece_ip_reset(video);
npcm_video_ece_ctrl_reset(video);
npcm_video_ece_set_fb_addr(video, video->src.dma);
npcm_video_ece_set_lp(video, video->bytesperline);
dev_dbg(video->dev, "ECE open: client %d\n",
atomic_read(&video->ece.clients));
}
}
static void npcm_video_stop(struct npcm_video *video)
{
struct regmap *vcd = video->vcd_regmap;
set_bit(VIDEO_STOPPED, &video->flags);
regmap_write(vcd, VCD_INTE, 0);
regmap_write(vcd, VCD_MODE, 0);
regmap_write(vcd, VCD_RCHG, 0);
regmap_write(vcd, VCD_STAT, VCD_STAT_CLEAR);
if (video->src.size)
npcm_video_free_fb(video, &video->src);
npcm_video_free_diff_table(video);
video->v4l2_input_status = V4L2_IN_ST_NO_SIGNAL;
video->flags = 0;
video->ctrl_cmd = VCD_CMD_OPERATION_CAPTURE;
if (video->ece.enable && atomic_dec_return(&video->ece.clients) == 0) {
npcm_video_ece_stop(video);
dev_dbg(video->dev, "ECE close: client %d\n",
atomic_read(&video->ece.clients));
}
}
static unsigned int npcm_video_raw(struct npcm_video *video, int index, void *addr)
{
unsigned int width = video->active_timings.width;
unsigned int height = video->active_timings.height;
unsigned int i, len, offset, bytes = 0;
video->rect[index] = npcm_video_add_rect(video, index, 0, 0, width, height);
for (i = 0; i < height; i++) {
len = width * video->bytesperpixel;
offset = i * video->bytesperline;
memcpy(addr + bytes, video->src.virt + offset, len);
bytes += len;
}
return bytes;
}
static unsigned int npcm_video_hextile(struct npcm_video *video, unsigned int index,
unsigned int dma_addr, void *vaddr)
{
struct rect_list *rect_list;
struct v4l2_rect *rect;
unsigned int offset, len, bytes = 0;
npcm_video_ece_ctrl_reset(video);
npcm_video_ece_clear_rect_offset(video);
npcm_video_ece_set_fb_addr(video, video->src.dma);
npcm_video_ece_set_enc_dba(video, dma_addr);
npcm_video_ece_set_lp(video, video->bytesperline);
npcm_video_get_diff_rect(video, index);
list_for_each_entry(rect_list, &video->list[index], list) {
rect = &rect_list->clip.c;
offset = npcm_video_ece_read_rect_offset(video);
npcm_video_ece_enc_rect(video, rect->left, rect->top,
rect->width, rect->height);
len = npcm_video_ece_get_ed_size(video, offset, vaddr);
npcm_video_ece_prepend_rect_header(vaddr + offset,
rect->left, rect->top,
rect->width, rect->height);
bytes += len;
}
return bytes;
}
static irqreturn_t npcm_video_irq(int irq, void *arg)
{
struct npcm_video *video = arg;
struct regmap *vcd = video->vcd_regmap;
struct npcm_video_buffer *buf;
unsigned int index, size, status, fmt;
dma_addr_t dma_addr;
void *addr;
static const struct v4l2_event ev = {
.type = V4L2_EVENT_SOURCE_CHANGE,
.u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION,
};
regmap_read(vcd, VCD_STAT, &status);
dev_dbg(video->dev, "VCD irq status 0x%x\n", status);
regmap_write(vcd, VCD_STAT, VCD_STAT_CLEAR);
if (test_bit(VIDEO_STOPPED, &video->flags) ||
!test_bit(VIDEO_STREAMING, &video->flags))
return IRQ_NONE;
if (status & VCD_STAT_DONE) {
regmap_write(vcd, VCD_INTE, 0);
mutex_lock(&video->buffer_lock);
clear_bit(VIDEO_CAPTURING, &video->flags);
buf = list_first_entry_or_null(&video->buffers,
struct npcm_video_buffer, link);
if (!buf) {
mutex_unlock(&video->buffer_lock);
return IRQ_NONE;
}
addr = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
index = buf->vb.vb2_buf.index;
fmt = video->pix_fmt.pixelformat;
switch (fmt) {
case V4L2_PIX_FMT_RGB565:
size = npcm_video_raw(video, index, addr);
break;
case V4L2_PIX_FMT_HEXTILE:
dma_addr = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0);
size = npcm_video_hextile(video, index, dma_addr, addr);
break;
default:
mutex_unlock(&video->buffer_lock);
return IRQ_NONE;
}
vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size);
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);
mutex_unlock(&video->buffer_lock);
if (npcm_video_start_frame(video))
dev_err(video->dev, "Failed to capture next frame\n");
}
if (status & VCD_STAT_VHT_CHG || status & VCD_STAT_HAC_CHG) {
if (!test_bit(VIDEO_RES_CHANGING, &video->flags)) {
set_bit(VIDEO_RES_CHANGING, &video->flags);
vb2_queue_error(&video->queue);
v4l2_event_queue(&video->vdev, &ev);
}
}
if (status & VCD_STAT_IFOR || status & VCD_STAT_IFOT) {
dev_warn(video->dev, "VCD FIFO overrun or over thresholds\n");
if (npcm_video_start_frame(video))
dev_err(video->dev, "Failed to recover from FIFO overrun\n");
}
return IRQ_HANDLED;
}
static int npcm_video_querycap(struct file *file, void *fh,
struct v4l2_capability *cap)
{
strscpy(cap->driver, DEVICE_NAME, sizeof(cap->driver));
strscpy(cap->card, "NPCM Video Engine", sizeof(cap->card));
return 0;
}
static int npcm_video_enum_format(struct file *file, void *fh,
struct v4l2_fmtdesc *f)
{
struct npcm_video *video = video_drvdata(file);
const struct npcm_fmt *fmt;
if (f->index >= NUM_FORMATS)
return -EINVAL;
fmt = &npcm_fmt_list[f->index];
if (fmt->fourcc == V4L2_PIX_FMT_HEXTILE && !video->ece.enable)
return -EINVAL;
f->pixelformat = fmt->fourcc;
return 0;
}
static int npcm_video_try_format(struct file *file, void *fh,
struct v4l2_format *f)
{
struct npcm_video *video = video_drvdata(file);
const struct npcm_fmt *fmt;
fmt = npcm_video_find_format(f);
if (!fmt || (fmt->fourcc == V4L2_PIX_FMT_HEXTILE && !video->ece.enable))
f->fmt.pix.pixelformat = npcm_fmt_list[0].fourcc;
f->fmt.pix.field = V4L2_FIELD_NONE;
f->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
f->fmt.pix.quantization = V4L2_QUANTIZATION_FULL_RANGE;
f->fmt.pix.width = video->pix_fmt.width;
f->fmt.pix.height = video->pix_fmt.height;
f->fmt.pix.bytesperline = video->bytesperline;
f->fmt.pix.sizeimage = video->pix_fmt.sizeimage;
return 0;
}
static int npcm_video_get_format(struct file *file, void *fh,
struct v4l2_format *f)
{
struct npcm_video *video = video_drvdata(file);
f->fmt.pix = video->pix_fmt;
return 0;
}
static int npcm_video_set_format(struct file *file, void *fh,
struct v4l2_format *f)
{
struct npcm_video *video = video_drvdata(file);
int ret;
ret = npcm_video_try_format(file, fh, f);
if (ret)
return ret;
if (vb2_is_busy(&video->queue)) {
dev_err(video->dev, "%s device busy\n", __func__);
return -EBUSY;
}
video->pix_fmt.pixelformat = f->fmt.pix.pixelformat;
return 0;
}
static int npcm_video_enum_input(struct file *file, void *fh,
struct v4l2_input *inp)
{
struct npcm_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 npcm_video_get_input(struct file *file, void *fh, unsigned int *i)
{
*i = 0;
return 0;
}
static int npcm_video_set_input(struct file *file, void *fh, unsigned int i)
{
if (i)
return -EINVAL;
return 0;
}
static int npcm_video_set_dv_timings(struct file *file, void *fh,
struct v4l2_dv_timings *timings)
{
struct npcm_video *video = video_drvdata(file);
int rc;
if (timings->bt.width == video->active_timings.width &&
timings->bt.height == video->active_timings.height)
return 0;
if (vb2_is_busy(&video->queue)) {
dev_err(video->dev, "%s device busy\n", __func__);
return -EBUSY;
}
rc = npcm_video_set_resolution(video, &timings->bt);
if (rc)
return rc;
timings->type = V4L2_DV_BT_656_1120;
return 0;
}
static int npcm_video_get_dv_timings(struct file *file, void *fh,
struct v4l2_dv_timings *timings)
{
struct npcm_video *video = video_drvdata(file);
timings->type = V4L2_DV_BT_656_1120;
timings->bt = video->active_timings;
return 0;
}
static int npcm_video_query_dv_timings(struct file *file, void *fh,
struct v4l2_dv_timings *timings)
{
struct npcm_video *video = video_drvdata(file);
npcm_video_detect_resolution(video);
timings->type = V4L2_DV_BT_656_1120;
timings->bt = video->detected_timings;
return video->v4l2_input_status ? -ENOLINK : 0;
}
static int npcm_video_enum_dv_timings(struct file *file, void *fh,
struct v4l2_enum_dv_timings *timings)
{
return v4l2_enum_dv_timings_cap(timings, &npcm_video_timings_cap,
NULL, NULL);
}
static int npcm_video_dv_timings_cap(struct file *file, void *fh,
struct v4l2_dv_timings_cap *cap)
{
*cap = npcm_video_timings_cap;
return 0;
}
static int npcm_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 npcm_video_ioctls = {
.vidioc_querycap = npcm_video_querycap,
.vidioc_enum_fmt_vid_cap = npcm_video_enum_format,
.vidioc_g_fmt_vid_cap = npcm_video_get_format,
.vidioc_s_fmt_vid_cap = npcm_video_set_format,
.vidioc_try_fmt_vid_cap = npcm_video_try_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 = npcm_video_enum_input,
.vidioc_g_input = npcm_video_get_input,
.vidioc_s_input = npcm_video_set_input,
.vidioc_s_dv_timings = npcm_video_set_dv_timings,
.vidioc_g_dv_timings = npcm_video_get_dv_timings,
.vidioc_query_dv_timings = npcm_video_query_dv_timings,
.vidioc_enum_dv_timings = npcm_video_enum_dv_timings,
.vidioc_dv_timings_cap = npcm_video_dv_timings_cap,
.vidioc_subscribe_event = npcm_video_sub_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
static int npcm_video_set_ctrl(struct v4l2_ctrl *ctrl)
{
struct npcm_video *video = container_of(ctrl->handler, struct npcm_video,
ctrl_handler);
switch (ctrl->id) {
case V4L2_CID_NPCM_CAPTURE_MODE:
if (ctrl->val == V4L2_NPCM_CAPTURE_MODE_COMPLETE)
video->ctrl_cmd = VCD_CMD_OPERATION_CAPTURE;
else if (ctrl->val == V4L2_NPCM_CAPTURE_MODE_DIFF)
video->ctrl_cmd = VCD_CMD_OPERATION_COMPARE;
break;
default:
return -EINVAL;
}
return 0;
}
static const struct v4l2_ctrl_ops npcm_video_ctrl_ops = {
.s_ctrl = npcm_video_set_ctrl,
};
static const char * const npcm_ctrl_capture_mode_menu[] = {
"COMPLETE",
"DIFF",
NULL,
};
static const struct v4l2_ctrl_config npcm_ctrl_capture_mode = {
.ops = &npcm_video_ctrl_ops,
.id = V4L2_CID_NPCM_CAPTURE_MODE,
.name = "NPCM Video Capture Mode",
.type = V4L2_CTRL_TYPE_MENU,
.min = 0,
.max = V4L2_NPCM_CAPTURE_MODE_DIFF,
.def = 0,
.qmenu = npcm_ctrl_capture_mode_menu,
};
static const struct v4l2_ctrl_config npcm_ctrl_rect_count = {
.id = V4L2_CID_NPCM_RECT_COUNT,
.name = "NPCM Hextile Rectangle Count",
.type = V4L2_CTRL_TYPE_INTEGER,
.min = 0,
.max = (MAX_WIDTH / RECT_W) * (MAX_HEIGHT / RECT_H),
.step = 1,
.def = 0,
};
static int npcm_video_open(struct file *file)
{
struct npcm_video *video = video_drvdata(file);
int rc;
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))
npcm_video_start(video);
mutex_unlock(&video->video_lock);
return 0;
}
static int npcm_video_release(struct file *file)
{
struct npcm_video *video = video_drvdata(file);
int rc;
mutex_lock(&video->video_lock);
if (v4l2_fh_is_singular_file(file))
npcm_video_stop(video);
rc = _vb2_fop_release(file, NULL);
mutex_unlock(&video->video_lock);
return rc;
}
static const struct v4l2_file_operations npcm_video_v4l2_fops = {
.owner = THIS_MODULE,
.read = vb2_fop_read,
.poll = vb2_fop_poll,
.unlocked_ioctl = video_ioctl2,
.mmap = vb2_fop_mmap,
.open = npcm_video_open,
.release = npcm_video_release,
};
static int npcm_video_queue_setup(struct vb2_queue *q, unsigned int *num_buffers,
unsigned int *num_planes, unsigned int sizes[],
struct device *alloc_devs[])
{
struct npcm_video *video = vb2_get_drv_priv(q);
unsigned int i;
if (*num_planes) {
if (sizes[0] < video->pix_fmt.sizeimage)
return -EINVAL;
return 0;
}
*num_planes = 1;
sizes[0] = video->pix_fmt.sizeimage;
for (i = 0; i < VIDEO_MAX_FRAME; i++)
INIT_LIST_HEAD(&video->list[i]);
return 0;
}
static int npcm_video_buf_prepare(struct vb2_buffer *vb)
{
struct npcm_video *video = vb2_get_drv_priv(vb->vb2_queue);
if (vb2_plane_size(vb, 0) < video->pix_fmt.sizeimage)
return -EINVAL;
return 0;
}
static int npcm_video_start_streaming(struct vb2_queue *q, unsigned int count)
{
struct npcm_video *video = vb2_get_drv_priv(q);
int rc;
video->sequence = 0;
rc = npcm_video_start_frame(video);
if (rc) {
npcm_video_bufs_done(video, VB2_BUF_STATE_QUEUED);
return rc;
}
set_bit(VIDEO_STREAMING, &video->flags);
return 0;
}
static void npcm_video_stop_streaming(struct vb2_queue *q)
{
struct npcm_video *video = vb2_get_drv_priv(q);
struct regmap *vcd = video->vcd_regmap;
clear_bit(VIDEO_STREAMING, &video->flags);
regmap_write(vcd, VCD_INTE, 0);
regmap_write(vcd, VCD_STAT, VCD_STAT_CLEAR);
npcm_video_gfx_reset(video);
npcm_video_bufs_done(video, VB2_BUF_STATE_ERROR);
video->ctrl_cmd = VCD_CMD_OPERATION_CAPTURE;
v4l2_ctrl_s_ctrl(video->rect_cnt_ctrl, 0);
}
static void npcm_video_buf_queue(struct vb2_buffer *vb)
{
struct npcm_video *video = vb2_get_drv_priv(vb->vb2_queue);
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct npcm_video_buffer *nvb = to_npcm_video_buffer(vbuf);
bool empty;
mutex_lock(&video->buffer_lock);
empty = list_empty(&video->buffers);
list_add_tail(&nvb->link, &video->buffers);
mutex_unlock(&video->buffer_lock);
if (test_bit(VIDEO_STREAMING, &video->flags) &&
!test_bit(VIDEO_CAPTURING, &video->flags) && empty) {
if (npcm_video_start_frame(video))
dev_err(video->dev, "Failed to capture next frame\n");
}
}
static void npcm_video_buf_finish(struct vb2_buffer *vb)
{
struct npcm_video *video = vb2_get_drv_priv(vb->vb2_queue);
struct list_head *head, *pos, *nx;
struct rect_list *tmp;
if (test_bit(VIDEO_STREAMING, &video->flags)) {
v4l2_ctrl_s_ctrl(video->rect_cnt_ctrl, video->rect[vb->index]);
head = &video->list[vb->index];
list_for_each_safe(pos, nx, head) {
tmp = list_entry(pos, struct rect_list, list);
list_del(&tmp->list);
kfree(tmp);
}
}
}
static const struct regmap_config npcm_video_regmap_cfg = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.max_register = VCD_FIFO,
};
static const struct regmap_config npcm_video_ece_regmap_cfg = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.max_register = ECE_HEX_RECT_OFFSET,
};
static const struct vb2_ops npcm_video_vb2_ops = {
.queue_setup = npcm_video_queue_setup,
.buf_prepare = npcm_video_buf_prepare,
.buf_finish = npcm_video_buf_finish,
.start_streaming = npcm_video_start_streaming,
.stop_streaming = npcm_video_stop_streaming,
.buf_queue = npcm_video_buf_queue,
};
static int npcm_video_setup_video(struct npcm_video *video)
{
struct v4l2_device *v4l2_dev = &video->v4l2_dev;
struct video_device *vdev = &video->vdev;
struct vb2_queue *vbq = &video->queue;
int rc;
if (video->ece.enable)
video->pix_fmt.pixelformat = V4L2_PIX_FMT_HEXTILE;
else
video->pix_fmt.pixelformat = V4L2_PIX_FMT_RGB565;
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_custom(&video->ctrl_handler, &npcm_ctrl_capture_mode, NULL);
video->rect_cnt_ctrl = v4l2_ctrl_new_custom(&video->ctrl_handler,
&npcm_ctrl_rect_count, NULL);
if (video->ctrl_handler.error) {
dev_err(video->dev, "Failed to init controls: %d\n",
video->ctrl_handler.error);
rc = video->ctrl_handler.error;
goto rel_ctrl_handler;
}
v4l2_dev->ctrl_handler = &video->ctrl_handler;
vbq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
vbq->io_modes = VB2_MMAP | VB2_DMABUF;
vbq->dev = v4l2_dev->dev;
vbq->lock = &video->video_lock;
vbq->ops = &npcm_video_vb2_ops;
vbq->mem_ops = &vb2_dma_contig_memops;
vbq->drv_priv = video;
vbq->buf_struct_size = sizeof(struct npcm_video_buffer);
vbq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
vbq->min_queued_buffers = 3;
rc = vb2_queue_init(vbq);
if (rc) {
dev_err(video->dev, "Failed to init vb2 queue\n");
goto rel_ctrl_handler;
}
vdev->queue = vbq;
vdev->fops = &npcm_video_v4l2_fops;
vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | 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 = &npcm_video_ioctls;
vdev->lock = &video->video_lock;
video_set_drvdata(vdev, video);
rc = video_register_device(vdev, VFL_TYPE_VIDEO, 0);
if (rc) {
dev_err(video->dev, "Failed to register video device\n");
goto rel_vb_queue;
}
return 0;
rel_vb_queue:
vb2_queue_release(vbq);
rel_ctrl_handler:
v4l2_ctrl_handler_free(&video->ctrl_handler);
v4l2_device_unregister(v4l2_dev);
return rc;
}
static int npcm_video_ece_init(struct npcm_video *video)
{
struct device_node *ece_node __free(device_node) = NULL;
struct device *dev = video->dev;
struct platform_device *ece_pdev;
void __iomem *regs;
ece_node = of_parse_phandle(video->dev->of_node, "nuvoton,ece", 0);
if (!ece_node) {
dev_err(dev, "Failed to get ECE phandle in DTS\n");
return -ENODEV;
}
video->ece.enable = of_device_is_available(ece_node);
if (video->ece.enable) {
dev_info(dev, "Support HEXTILE pixel format\n");
ece_pdev = of_find_device_by_node(ece_node);
if (!ece_pdev) {
dev_err(dev, "Failed to find ECE device\n");
return -ENODEV;
}
struct device *ece_dev __free(put_device) = &ece_pdev->dev;
regs = devm_platform_ioremap_resource(ece_pdev, 0);
if (IS_ERR(regs)) {
dev_err(dev, "Failed to parse ECE reg in DTS\n");
return PTR_ERR(regs);
}
video->ece.regmap = devm_regmap_init_mmio(dev, regs,
&npcm_video_ece_regmap_cfg);
if (IS_ERR(video->ece.regmap)) {
dev_err(dev, "Failed to initialize ECE regmap\n");
return PTR_ERR(video->ece.regmap);
}
video->ece.reset = devm_reset_control_get(ece_dev, NULL);
if (IS_ERR(video->ece.reset)) {
dev_err(dev, "Failed to get ECE reset control in DTS\n");
return PTR_ERR(video->ece.reset);
}
}
return 0;
}
static int npcm_video_init(struct npcm_video *video)
{
struct device *dev = video->dev;
int irq, rc;
irq = irq_of_parse_and_map(dev->of_node, 0);
if (!irq) {
dev_err(dev, "Failed to find VCD IRQ\n");
return -ENODEV;
}
rc = devm_request_threaded_irq(dev, irq, NULL, npcm_video_irq,
IRQF_ONESHOT, DEVICE_NAME, video);
if (rc < 0) {
dev_err(dev, "Failed to request IRQ %d\n", irq);
return rc;
}
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");
of_reserved_mem_device_release(dev);
}
rc = npcm_video_ece_init(video);
if (rc) {
dev_err(dev, "Failed to initialize ECE\n");
return rc;
}
return 0;
}
static int npcm_video_probe(struct platform_device *pdev)
{
struct npcm_video *video = kzalloc_obj(*video);
int rc;
void __iomem *regs;
if (!video)
return -ENOMEM;
video->dev = &pdev->dev;
mutex_init(&video->video_lock);
mutex_init(&video->buffer_lock);
INIT_LIST_HEAD(&video->buffers);
regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(regs)) {
dev_err(&pdev->dev, "Failed to parse VCD reg in DTS\n");
return PTR_ERR(regs);
}
video->vcd_regmap = devm_regmap_init_mmio(&pdev->dev, regs,
&npcm_video_regmap_cfg);
if (IS_ERR(video->vcd_regmap)) {
dev_err(&pdev->dev, "Failed to initialize VCD regmap\n");
return PTR_ERR(video->vcd_regmap);
}
video->reset = devm_reset_control_get(&pdev->dev, NULL);
if (IS_ERR(video->reset)) {
dev_err(&pdev->dev, "Failed to get VCD reset control in DTS\n");
return PTR_ERR(video->reset);
}
video->gcr_regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
"nuvoton,sysgcr");
if (IS_ERR(video->gcr_regmap))
return PTR_ERR(video->gcr_regmap);
video->gfx_regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
"nuvoton,sysgfxi");
if (IS_ERR(video->gfx_regmap))
return PTR_ERR(video->gfx_regmap);
rc = npcm_video_init(video);
if (rc)
return rc;
rc = npcm_video_setup_video(video);
if (rc)
return rc;
dev_info(video->dev, "NPCM video driver probed\n");
return 0;
}
static void npcm_video_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct v4l2_device *v4l2_dev = dev_get_drvdata(dev);
struct npcm_video *video = to_npcm_video(v4l2_dev);
video_unregister_device(&video->vdev);
vb2_queue_release(&video->queue);
v4l2_ctrl_handler_free(&video->ctrl_handler);
v4l2_device_unregister(v4l2_dev);
if (video->ece.enable)
npcm_video_ece_stop(video);
of_reserved_mem_device_release(dev);
}
static const struct of_device_id npcm_video_match[] = {
{ .compatible = "nuvoton,npcm750-vcd" },
{ .compatible = "nuvoton,npcm845-vcd" },
{},
};
MODULE_DEVICE_TABLE(of, npcm_video_match);
static struct platform_driver npcm_video_driver = {
.driver = {
.name = DEVICE_NAME,
.of_match_table = npcm_video_match,
},
.probe = npcm_video_probe,
.remove = npcm_video_remove,
};
module_platform_driver(npcm_video_driver);
MODULE_AUTHOR("Joseph Liu <kwliu@nuvoton.com>");
MODULE_AUTHOR("Marvin Lin <kflin@nuvoton.com>");
MODULE_DESCRIPTION("Driver for Nuvoton NPCM Video Capture/Encode Engine");
MODULE_LICENSE("GPL v2");
