// SPDX-License-Identifier: GPL-2.0+
/*
* Driver for Renesas RZ / G2L CRU
*
* Copyright ( C ) 2022 Renesas Electronics Corp .
*
* Based on Renesas R - Car VIN
* Copyright ( C ) 2016 Renesas Electronics Corp .
* Copyright ( C ) 2011 - 2013 Renesas Solutions Corp .
* Copyright ( C ) 2013 Cogent Embedded , Inc . , < source @ cogentembedded . com >
* Copyright ( C ) 2008 Magnus Damm
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/pm_runtime.h>
#include <media/mipi-csi2.h>
#include <media/v4l2-ioctl.h>
#include <media/videobuf2-dma-contig.h>
#include "rzg2l-cru.h"
#include "rzg2l-cru-regs.h"
#define RZG2L_TIMEOUT_MS 100
#define RZG2L_RETRIES 10
#define RZG2L_CRU_DEFAULT_FORMAT V4L2_PIX_FMT_UYVY
#define RZG2L_CRU_DEFAULT_WIDTH RZG2L_CRU_MIN_INPUT_WIDTH
#define RZG2L_CRU_DEFAULT_HEIGHT RZG2L_CRU_MIN_INPUT_HEIGHT
#define RZG2L_CRU_DEFAULT_FIELD V4L2_FIELD_NONE
#define RZG2L_CRU_DEFAULT_COLORSPACE V4L2_COLORSPACE_SRGB
#define RZG2L_CRU_STRIDE_MAX 32640
#define RZG2L_CRU_STRIDE_ALIGN 128
struct rzg2l_cru_buffer {
struct vb2_v4l2_buffer vb;
struct list_head list;
};
#define to_buf_list(vb2_buffer) \
(&container_of(vb2_buffer, struct rzg2l_cru_buffer, vb)->list)
/* -----------------------------------------------------------------------------
* DMA operations
*/
static void __rzg2l_cru_write(struct rzg2l_cru_dev *cru, u32 offset, u32 value)
{
const u16 *regs = cru->info->regs;
/*
* CRUnCTRL is a first register on all CRU supported SoCs so validate
* rest of the registers have valid offset being set in cru - > info - > regs .
*/
if (WARN_ON(offset >= RZG2L_CRU_MAX_REG) ||
WARN_ON(offset != CRUnCTRL && regs[offset] == 0 ))
return ;
iowrite32(value, cru->base + regs[offset]);
}
static u32 __rzg2l_cru_read(struct rzg2l_cru_dev *cru, u32 offset)
{
const u16 *regs = cru->info->regs;
/*
* CRUnCTRL is a first register on all CRU supported SoCs so validate
* rest of the registers have valid offset being set in cru - > info - > regs .
*/
if (WARN_ON(offset >= RZG2L_CRU_MAX_REG) ||
WARN_ON(offset != CRUnCTRL && regs[offset] == 0 ))
return 0 ;
return ioread32(cru->base + regs[offset]);
}
static __always_inline void
__rzg2l_cru_write_constant(struct rzg2l_cru_dev *cru, u32 offset, u32 value)
{
const u16 *regs = cru->info->regs;
BUILD_BUG_ON(offset >= RZG2L_CRU_MAX_REG);
iowrite32(value, cru->base + regs[offset]);
}
static __always_inline u32
__rzg2l_cru_read_constant(struct rzg2l_cru_dev *cru, u32 offset)
{
const u16 *regs = cru->info->regs;
BUILD_BUG_ON(offset >= RZG2L_CRU_MAX_REG);
return ioread32(cru->base + regs[offset]);
}
#define rzg2l_cru_write(cru, offset, value) \
(__builtin_constant_p(offset) ? \
__rzg2l_cru_write_constant(cru, offset, value) : \
__rzg2l_cru_write(cru, offset, value))
#define rzg2l_cru_read(cru, offset) \
(__builtin_constant_p(offset) ? \
__rzg2l_cru_read_constant(cru, offset) : \
__rzg2l_cru_read(cru, offset))
/* Need to hold qlock before calling */
static void return_unused_buffers(struct rzg2l_cru_dev *cru,
enum vb2_buffer_state state)
{
struct rzg2l_cru_buffer *buf, *node;
unsigned long flags;
unsigned int i;
spin_lock_irqsave(&cru->qlock, flags);
for (i = 0 ; i < cru->num_buf; i++) {
if (cru->queue_buf[i]) {
vb2_buffer_done(&cru->queue_buf[i]->vb2_buf,
state);
cru->queue_buf[i] = NULL;
}
}
list_for_each_entry_safe(buf, node, &cru->buf_list, list) {
vb2_buffer_done(&buf->vb.vb2_buf, state);
list_del(&buf->list);
}
spin_unlock_irqrestore(&cru->qlock, flags);
}
static int rzg2l_cru_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
unsigned int *nplanes, unsigned int sizes[],
struct device *alloc_devs[])
{
struct rzg2l_cru_dev *cru = vb2_get_drv_priv(vq);
/* Make sure the image size is large enough. */
if (*nplanes)
return sizes[0 ] < cru->format.sizeimage ? -EINVAL : 0 ;
*nplanes = 1 ;
sizes[0 ] = cru->format.sizeimage;
return 0 ;
};
static int rzg2l_cru_buffer_prepare(struct vb2_buffer *vb)
{
struct rzg2l_cru_dev *cru = vb2_get_drv_priv(vb->vb2_queue);
unsigned long size = cru->format.sizeimage;
if (vb2_plane_size(vb, 0 ) < size) {
dev_err(cru->dev, "buffer too small (%lu < %lu)\n" ,
vb2_plane_size(vb, 0 ), size);
return -EINVAL;
}
vb2_set_plane_payload(vb, 0 , size);
return 0 ;
}
static void rzg2l_cru_buffer_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct rzg2l_cru_dev *cru = vb2_get_drv_priv(vb->vb2_queue);
unsigned long flags;
spin_lock_irqsave(&cru->qlock, flags);
list_add_tail(to_buf_list(vbuf), &cru->buf_list);
spin_unlock_irqrestore(&cru->qlock, flags);
}
static void rzg2l_cru_set_slot_addr(struct rzg2l_cru_dev *cru,
int slot, dma_addr_t addr)
{
/*
* The address needs to be 512 bytes aligned . Driver should never accept
* settings that do not satisfy this in the first place . . .
*/
if (WARN_ON((addr) & RZG2L_CRU_HW_BUFFER_MASK))
return ;
/* Currently, we just use the buffer in 32 bits address */
rzg2l_cru_write(cru, AMnMBxADDRL(slot), addr);
rzg2l_cru_write(cru, AMnMBxADDRH(slot), 0 );
cru->buf_addr[slot] = addr;
}
/*
* Moves a buffer from the queue to the HW slot . If no buffer is
* available use the scratch buffer . The scratch buffer is never
* returned to userspace , its only function is to enable the capture
* loop to keep running .
*/
static void rzg2l_cru_fill_hw_slot(struct rzg2l_cru_dev *cru, int slot)
{
struct vb2_v4l2_buffer *vbuf;
struct rzg2l_cru_buffer *buf;
dma_addr_t phys_addr;
/* A already populated slot shall never be overwritten. */
if (WARN_ON(cru->queue_buf[slot]))
return ;
dev_dbg(cru->dev, "Filling HW slot: %d\n" , slot);
if (list_empty(&cru->buf_list)) {
cru->queue_buf[slot] = NULL;
phys_addr = cru->scratch_phys;
} else {
/* Keep track of buffer we give to HW */
buf = list_entry(cru->buf_list.next,
struct rzg2l_cru_buffer, list);
vbuf = &buf->vb;
list_del_init(to_buf_list(vbuf));
cru->queue_buf[slot] = vbuf;
/* Setup DMA */
phys_addr = vb2_dma_contig_plane_dma_addr(&vbuf->vb2_buf, 0 );
}
rzg2l_cru_set_slot_addr(cru, slot, phys_addr);
}
static void rzg2l_cru_initialize_axi(struct rzg2l_cru_dev *cru)
{
const struct rzg2l_cru_info *info = cru->info;
unsigned int slot;
u32 amnaxiattr;
/*
* Set image data memory banks .
* Currently , we will use maximum address .
*/
rzg2l_cru_write(cru, AMnMBVALID, AMnMBVALID_MBVALID(cru->num_buf - 1 ));
for (slot = 0 ; slot < cru->num_buf; slot++)
rzg2l_cru_fill_hw_slot(cru, slot);
if (info->has_stride) {
u32 stride = cru->format.bytesperline;
u32 amnis;
stride /= RZG2L_CRU_STRIDE_ALIGN;
amnis = rzg2l_cru_read(cru, AMnIS) & ~AMnIS_IS_MASK;
rzg2l_cru_write(cru, AMnIS, amnis | AMnIS_IS(stride));
}
/* Set AXI burst max length to recommended setting */
amnaxiattr = rzg2l_cru_read(cru, AMnAXIATTR) & ~AMnAXIATTR_AXILEN_MASK;
amnaxiattr |= AMnAXIATTR_AXILEN;
rzg2l_cru_write(cru, AMnAXIATTR, amnaxiattr);
}
void rzg3e_cru_csi2_setup(struct rzg2l_cru_dev *cru,
const struct rzg2l_cru_ip_format *ip_fmt,
u8 csi_vc)
{
const struct rzg2l_cru_info *info = cru->info;
u32 icnmc = ICnMC_INF(ip_fmt->datatype);
icnmc |= rzg2l_cru_read(cru, info->image_conv) & ~ICnMC_INF_MASK;
/* Set virtual channel CSI2 */
icnmc |= ICnMC_VCSEL(csi_vc);
rzg2l_cru_write(cru, ICnSVCNUM, csi_vc);
rzg2l_cru_write(cru, ICnSVC, ICnSVC_SVC0(0 ) | ICnSVC_SVC1(1 ) |
ICnSVC_SVC2(2 ) | ICnSVC_SVC3(3 ));
rzg2l_cru_write(cru, info->image_conv, icnmc);
}
void rzg2l_cru_csi2_setup(struct rzg2l_cru_dev *cru,
const struct rzg2l_cru_ip_format *ip_fmt,
u8 csi_vc)
{
const struct rzg2l_cru_info *info = cru->info;
u32 icnmc = ICnMC_INF(ip_fmt->datatype);
icnmc |= rzg2l_cru_read(cru, info->image_conv) & ~ICnMC_INF_MASK;
/* Set virtual channel CSI2 */
icnmc |= ICnMC_VCSEL(csi_vc);
rzg2l_cru_write(cru, info->image_conv, icnmc);
}
static int rzg2l_cru_initialize_image_conv(struct rzg2l_cru_dev *cru,
struct v4l2_mbus_framefmt *ip_sd_fmt,
u8 csi_vc)
{
const struct rzg2l_cru_info *info = cru->info;
const struct rzg2l_cru_ip_format *cru_video_fmt;
const struct rzg2l_cru_ip_format *cru_ip_fmt;
cru_ip_fmt = rzg2l_cru_ip_code_to_fmt(ip_sd_fmt->code);
info->csi_setup(cru, cru_ip_fmt, csi_vc);
/* Output format */
cru_video_fmt = rzg2l_cru_ip_format_to_fmt(cru->format.pixelformat);
if (!cru_video_fmt) {
dev_err(cru->dev, "Invalid pixelformat (0x%x)\n" ,
cru->format.pixelformat);
return -EINVAL;
}
/* If input and output use same colorspace, do bypass mode */
if (cru_ip_fmt->yuv == cru_video_fmt->yuv)
rzg2l_cru_write(cru, info->image_conv,
rzg2l_cru_read(cru, info->image_conv) | ICnMC_CSCTHR);
else
rzg2l_cru_write(cru, info->image_conv,
rzg2l_cru_read(cru, info->image_conv) & ~ICnMC_CSCTHR);
/* Set output data format */
rzg2l_cru_write(cru, ICnDMR, cru_video_fmt->icndmr);
return 0 ;
}
bool rzg3e_fifo_empty(struct rzg2l_cru_dev *cru)
{
u32 amnfifopntr = rzg2l_cru_read(cru, AMnFIFOPNTR);
if ((((amnfifopntr & AMnFIFOPNTR_FIFORPNTR_B1) >> 24 ) ==
((amnfifopntr & AMnFIFOPNTR_FIFOWPNTR_B1) >> 8 )) &&
(((amnfifopntr & AMnFIFOPNTR_FIFORPNTR_B0) >> 16 ) ==
(amnfifopntr & AMnFIFOPNTR_FIFOWPNTR_B0)))
return true ;
return false ;
}
bool rzg2l_fifo_empty(struct rzg2l_cru_dev *cru)
{
u32 amnfifopntr, amnfifopntr_w, amnfifopntr_r_y;
amnfifopntr = rzg2l_cru_read(cru, AMnFIFOPNTR);
amnfifopntr_w = amnfifopntr & AMnFIFOPNTR_FIFOWPNTR;
amnfifopntr_r_y =
(amnfifopntr & AMnFIFOPNTR_FIFORPNTR_Y) >> 16 ;
return amnfifopntr_w == amnfifopntr_r_y;
}
void rzg2l_cru_stop_image_processing(struct rzg2l_cru_dev *cru)
{
unsigned int retries = 0 ;
unsigned long flags;
u32 icnms;
spin_lock_irqsave(&cru->qlock, flags);
/* Disable and clear the interrupt */
cru->info->disable_interrupts(cru);
/* Stop the operation of image conversion */
rzg2l_cru_write(cru, ICnEN, 0 );
/* Wait for streaming to stop */
while ((rzg2l_cru_read(cru, ICnMS) & ICnMS_IA) && retries++ < RZG2L_RETRIES) {
spin_unlock_irqrestore(&cru->qlock, flags);
msleep(RZG2L_TIMEOUT_MS);
spin_lock_irqsave(&cru->qlock, flags);
}
icnms = rzg2l_cru_read(cru, ICnMS) & ICnMS_IA;
if (icnms)
dev_err(cru->dev, "Failed stop HW, something is seriously broken\n" );
cru->state = RZG2L_CRU_DMA_STOPPED;
/* Wait until the FIFO becomes empty */
for (retries = 5 ; retries > 0 ; retries--) {
if (cru->info->fifo_empty(cru))
break ;
usleep_range(10 , 20 );
}
/* Notify that FIFO is not empty here */
if (!retries)
dev_err(cru->dev, "Failed to empty FIFO\n" );
/* Stop AXI bus */
rzg2l_cru_write(cru, AMnAXISTP, AMnAXISTP_AXI_STOP);
/* Wait until the AXI bus stop */
for (retries = 5 ; retries > 0 ; retries--) {
if (rzg2l_cru_read(cru, AMnAXISTPACK) &
AMnAXISTPACK_AXI_STOP_ACK)
break ;
usleep_range(10 , 20 );
}
/* Notify that AXI bus can not stop here */
if (!retries)
dev_err(cru->dev, "Failed to stop AXI bus\n" );
/* Cancel the AXI bus stop request */
rzg2l_cru_write(cru, AMnAXISTP, 0 );
/* Reset the CRU (AXI-master) */
reset_control_assert(cru->aresetn);
/* Resets the image processing module */
rzg2l_cru_write(cru, CRUnRST, 0 );
spin_unlock_irqrestore(&cru->qlock, flags);
}
static int rzg2l_cru_get_virtual_channel(struct rzg2l_cru_dev *cru)
{
struct v4l2_mbus_frame_desc fd = { };
struct media_pad *remote_pad;
int ret;
remote_pad = media_pad_remote_pad_unique(&cru->ip.pads[RZG2L_CRU_IP_SINK]);
ret = v4l2_subdev_call(cru->ip.remote, pad, get_frame_desc, remote_pad->index, &fd);
if (ret < 0 && ret != -ENOIOCTLCMD) {
dev_err(cru->dev, "get_frame_desc failed on IP remote subdev\n" );
return ret;
}
/* If remote subdev does not implement .get_frame_desc default to VC0. */
if (ret == -ENOIOCTLCMD)
return 0 ;
if (fd.type != V4L2_MBUS_FRAME_DESC_TYPE_CSI2) {
dev_err(cru->dev, "get_frame_desc returned invalid bus type %d\n" , fd.type);
return -EINVAL;
}
if (!fd.num_entries) {
dev_err(cru->dev, "get_frame_desc returned zero entries\n" );
return -EINVAL;
}
return fd.entry[0 ].bus.csi2.vc;
}
void rzg3e_cru_enable_interrupts(struct rzg2l_cru_dev *cru)
{
rzg2l_cru_write(cru, CRUnIE2, CRUnIE2_FSxE(cru->svc_channel));
rzg2l_cru_write(cru, CRUnIE2, CRUnIE2_FExE(cru->svc_channel));
}
void rzg3e_cru_disable_interrupts(struct rzg2l_cru_dev *cru)
{
rzg2l_cru_write(cru, CRUnIE, 0 );
rzg2l_cru_write(cru, CRUnIE2, 0 );
rzg2l_cru_write(cru, CRUnINTS, rzg2l_cru_read(cru, CRUnINTS));
rzg2l_cru_write(cru, CRUnINTS2, rzg2l_cru_read(cru, CRUnINTS2));
}
void rzg2l_cru_enable_interrupts(struct rzg2l_cru_dev *cru)
{
rzg2l_cru_write(cru, CRUnIE, CRUnIE_EFE);
}
void rzg2l_cru_disable_interrupts(struct rzg2l_cru_dev *cru)
{
rzg2l_cru_write(cru, CRUnIE, 0 );
rzg2l_cru_write(cru, CRUnINTS, 0 x001f000f);
}
int rzg2l_cru_start_image_processing(struct rzg2l_cru_dev *cru)
{
struct v4l2_mbus_framefmt *fmt = rzg2l_cru_ip_get_src_fmt(cru);
unsigned long flags;
u8 csi_vc;
int ret;
ret = rzg2l_cru_get_virtual_channel(cru);
if (ret < 0 )
return ret;
csi_vc = ret;
cru->svc_channel = csi_vc;
spin_lock_irqsave(&cru->qlock, flags);
/* Select a video input */
rzg2l_cru_write(cru, CRUnCTRL, CRUnCTRL_VINSEL(0 ));
/* Cancel the software reset for image processing block */
rzg2l_cru_write(cru, CRUnRST, CRUnRST_VRESETN);
/* Disable and clear the interrupt before using */
cru->info->disable_interrupts(cru);
/* Initialize the AXI master */
rzg2l_cru_initialize_axi(cru);
/* Initialize image convert */
ret = rzg2l_cru_initialize_image_conv(cru, fmt, csi_vc);
if (ret) {
spin_unlock_irqrestore(&cru->qlock, flags);
return ret;
}
/* Enable interrupt */
cru->info->enable_interrupts(cru);
/* Enable image processing reception */
rzg2l_cru_write(cru, ICnEN, ICnEN_ICEN);
spin_unlock_irqrestore(&cru->qlock, flags);
return 0 ;
}
static int rzg2l_cru_set_stream(struct rzg2l_cru_dev *cru, int on)
{
struct media_pipeline *pipe;
struct v4l2_subdev *sd;
struct media_pad *pad;
int ret;
pad = media_pad_remote_pad_first(&cru->pad);
if (!pad)
return -EPIPE;
sd = media_entity_to_v4l2_subdev(pad->entity);
if (!on) {
int stream_off_ret = 0 ;
ret = v4l2_subdev_call(sd, video, s_stream, 0 );
if (ret)
stream_off_ret = ret;
ret = v4l2_subdev_call(sd, video, post_streamoff);
if (ret == -ENOIOCTLCMD)
ret = 0 ;
if (ret && !stream_off_ret)
stream_off_ret = ret;
video_device_pipeline_stop(&cru->vdev);
return stream_off_ret;
}
pipe = media_entity_pipeline(&sd->entity) ? : &cru->vdev.pipe;
ret = video_device_pipeline_start(&cru->vdev, pipe);
if (ret)
return ret;
ret = v4l2_subdev_call(sd, video, pre_streamon, 0 );
if (ret && ret != -ENOIOCTLCMD)
goto pipe_line_stop;
ret = v4l2_subdev_call(sd, video, s_stream, 1 );
if (ret && ret != -ENOIOCTLCMD)
goto err_s_stream;
return 0 ;
err_s_stream:
v4l2_subdev_call(sd, video, post_streamoff);
pipe_line_stop:
video_device_pipeline_stop(&cru->vdev);
return ret;
}
static void rzg2l_cru_stop_streaming(struct rzg2l_cru_dev *cru)
{
cru->state = RZG2L_CRU_DMA_STOPPING;
rzg2l_cru_set_stream(cru, 0 );
}
irqreturn_t rzg2l_cru_irq(int irq, void *data)
{
struct rzg2l_cru_dev *cru = data;
unsigned int handled = 0 ;
unsigned long flags;
u32 irq_status;
u32 amnmbs;
int slot;
spin_lock_irqsave(&cru->qlock, flags);
irq_status = rzg2l_cru_read(cru, CRUnINTS);
if (!irq_status)
goto done;
handled = 1 ;
rzg2l_cru_write(cru, CRUnINTS, rzg2l_cru_read(cru, CRUnINTS));
/* Nothing to do if capture status is 'RZG2L_CRU_DMA_STOPPED' */
if (cru->state == RZG2L_CRU_DMA_STOPPED) {
dev_dbg(cru->dev, "IRQ while state stopped\n" );
goto done;
}
/* Increase stop retries if capture status is 'RZG2L_CRU_DMA_STOPPING' */
if (cru->state == RZG2L_CRU_DMA_STOPPING) {
if (irq_status & CRUnINTS_SFS)
dev_dbg(cru->dev, "IRQ while state stopping\n" );
goto done;
}
/* Prepare for capture and update state */
amnmbs = rzg2l_cru_read(cru, AMnMBS);
slot = amnmbs & AMnMBS_MBSTS;
/*
* AMnMBS . MBSTS indicates the destination of Memory Bank ( MB ) .
* Recalculate to get the current transfer complete MB .
*/
if (slot == 0 )
slot = cru->num_buf - 1 ;
else
slot--;
/*
* To hand buffers back in a known order to userspace start
* to capture first from slot 0 .
*/
if (cru->state == RZG2L_CRU_DMA_STARTING) {
if (slot != 0 ) {
dev_dbg(cru->dev, "Starting sync slot: %d\n" , slot);
goto done;
}
dev_dbg(cru->dev, "Capture start synced!\n" );
cru->state = RZG2L_CRU_DMA_RUNNING;
}
/* Capture frame */
if (cru->queue_buf[slot]) {
cru->queue_buf[slot]->field = cru->format.field;
cru->queue_buf[slot]->sequence = cru->sequence;
cru->queue_buf[slot]->vb2_buf.timestamp = ktime_get_ns();
vb2_buffer_done(&cru->queue_buf[slot]->vb2_buf,
VB2_BUF_STATE_DONE);
cru->queue_buf[slot] = NULL;
} else {
/* Scratch buffer was used, dropping frame. */
dev_dbg(cru->dev, "Dropping frame %u\n" , cru->sequence);
}
cru->sequence++;
/* Prepare for next frame */
rzg2l_cru_fill_hw_slot(cru, slot);
done:
spin_unlock_irqrestore(&cru->qlock, flags);
return IRQ_RETVAL(handled);
}
static int rzg3e_cru_get_current_slot(struct rzg2l_cru_dev *cru)
{
u64 amnmadrs;
int slot;
/*
* When AMnMADRSL is read , AMnMADRSH of the higher - order
* address also latches the address .
*
* AMnMADRSH must be read after AMnMADRSL has been read .
*/
amnmadrs = rzg2l_cru_read(cru, AMnMADRSL);
amnmadrs |= (u64)rzg2l_cru_read(cru, AMnMADRSH) << 32 ;
/* Ensure amnmadrs is within this buffer range */
for (slot = 0 ; slot < cru->num_buf; slot++) {
if (amnmadrs >= cru->buf_addr[slot] &&
amnmadrs < cru->buf_addr[slot] + cru->format.sizeimage)
return slot;
}
dev_err(cru->dev, "Invalid MB address 0x%llx (out of range)\n" , amnmadrs);
return -EINVAL;
}
irqreturn_t rzg3e_cru_irq(int irq, void *data)
{
struct rzg2l_cru_dev *cru = data;
u32 irq_status;
int slot;
scoped_guard(spinlock, &cru->qlock) {
irq_status = rzg2l_cru_read(cru, CRUnINTS2);
if (!irq_status)
return IRQ_NONE;
dev_dbg(cru->dev, "CRUnINTS2 0x%x\n" , irq_status);
rzg2l_cru_write(cru, CRUnINTS2, rzg2l_cru_read(cru, CRUnINTS2));
/* Nothing to do if capture status is 'RZG2L_CRU_DMA_STOPPED' */
if (cru->state == RZG2L_CRU_DMA_STOPPED) {
dev_dbg(cru->dev, "IRQ while state stopped\n" );
return IRQ_HANDLED;
}
if (cru->state == RZG2L_CRU_DMA_STOPPING) {
if (irq_status & CRUnINTS2_FSxS(0 ) ||
irq_status & CRUnINTS2_FSxS(1 ) ||
irq_status & CRUnINTS2_FSxS(2 ) ||
irq_status & CRUnINTS2_FSxS(3 ))
dev_dbg(cru->dev, "IRQ while state stopping\n" );
return IRQ_HANDLED;
}
slot = rzg3e_cru_get_current_slot(cru);
if (slot < 0 )
return IRQ_HANDLED;
dev_dbg(cru->dev, "Current written slot: %d\n" , slot);
cru->buf_addr[slot] = 0 ;
/*
* To hand buffers back in a known order to userspace start
* to capture first from slot 0 .
*/
if (cru->state == RZG2L_CRU_DMA_STARTING) {
if (slot != 0 ) {
dev_dbg(cru->dev, "Starting sync slot: %d\n" , slot);
return IRQ_HANDLED;
}
dev_dbg(cru->dev, "Capture start synced!\n" );
cru->state = RZG2L_CRU_DMA_RUNNING;
}
/* Capture frame */
if (cru->queue_buf[slot]) {
struct vb2_v4l2_buffer *buf = cru->queue_buf[slot];
buf->field = cru->format.field;
buf->sequence = cru->sequence;
buf->vb2_buf.timestamp = ktime_get_ns();
vb2_buffer_done(&buf->vb2_buf, VB2_BUF_STATE_DONE);
cru->queue_buf[slot] = NULL;
} else {
/* Scratch buffer was used, dropping frame. */
dev_dbg(cru->dev, "Dropping frame %u\n" , cru->sequence);
}
cru->sequence++;
/* Prepare for next frame */
rzg2l_cru_fill_hw_slot(cru, slot);
}
return IRQ_HANDLED;
}
static int rzg2l_cru_start_streaming_vq(struct vb2_queue *vq, unsigned int count)
{
struct rzg2l_cru_dev *cru = vb2_get_drv_priv(vq);
int ret;
ret = pm_runtime_resume_and_get(cru->dev);
if (ret)
return ret;
ret = clk_prepare_enable(cru->vclk);
if (ret)
goto err_pm_put;
/* Release reset state */
ret = reset_control_deassert(cru->aresetn);
if (ret) {
dev_err(cru->dev, "failed to deassert aresetn\n" );
goto err_vclk_disable;
}
ret = reset_control_deassert(cru->presetn);
if (ret) {
reset_control_assert(cru->aresetn);
dev_err(cru->dev, "failed to deassert presetn\n" );
goto assert_aresetn;
}
/* Allocate scratch buffer */
cru->scratch = dma_alloc_coherent(cru->dev, cru->format.sizeimage,
&cru->scratch_phys, GFP_KERNEL);
if (!cru->scratch) {
return_unused_buffers(cru, VB2_BUF_STATE_QUEUED);
dev_err(cru->dev, "Failed to allocate scratch buffer\n" );
ret = -ENOMEM;
goto assert_presetn;
}
cru->sequence = 0 ;
ret = rzg2l_cru_set_stream(cru, 1 );
if (ret) {
return_unused_buffers(cru, VB2_BUF_STATE_QUEUED);
goto out;
}
cru->state = RZG2L_CRU_DMA_STARTING;
dev_dbg(cru->dev, "Starting to capture\n" );
return 0 ;
out:
if (ret)
dma_free_coherent(cru->dev, cru->format.sizeimage, cru->scratch,
cru->scratch_phys);
assert_presetn:
reset_control_assert(cru->presetn);
assert_aresetn:
reset_control_assert(cru->aresetn);
err_vclk_disable:
clk_disable_unprepare(cru->vclk);
err_pm_put:
pm_runtime_put_sync(cru->dev);
return ret;
}
static void rzg2l_cru_stop_streaming_vq(struct vb2_queue *vq)
{
struct rzg2l_cru_dev *cru = vb2_get_drv_priv(vq);
rzg2l_cru_stop_streaming(cru);
/* Free scratch buffer */
dma_free_coherent(cru->dev, cru->format.sizeimage,
cru->scratch, cru->scratch_phys);
return_unused_buffers(cru, VB2_BUF_STATE_ERROR);
reset_control_assert(cru->presetn);
clk_disable_unprepare(cru->vclk);
pm_runtime_put_sync(cru->dev);
}
static const struct vb2_ops rzg2l_cru_qops = {
.queue_setup = rzg2l_cru_queue_setup,
.buf_prepare = rzg2l_cru_buffer_prepare,
.buf_queue = rzg2l_cru_buffer_queue,
.start_streaming = rzg2l_cru_start_streaming_vq,
.stop_streaming = rzg2l_cru_stop_streaming_vq,
};
void rzg2l_cru_dma_unregister(struct rzg2l_cru_dev *cru)
{
mutex_destroy(&cru->lock);
v4l2_device_unregister(&cru->v4l2_dev);
vb2_queue_release(&cru->queue);
}
int rzg2l_cru_dma_register(struct rzg2l_cru_dev *cru)
{
struct vb2_queue *q = &cru->queue;
unsigned int i;
int ret;
/* Initialize the top-level structure */
ret = v4l2_device_register(cru->dev, &cru->v4l2_dev);
if (ret)
return ret;
mutex_init(&cru->lock);
INIT_LIST_HEAD(&cru->buf_list);
spin_lock_init(&cru->qlock);
cru->state = RZG2L_CRU_DMA_STOPPED;
for (i = 0 ; i < RZG2L_CRU_HW_BUFFER_MAX; i++)
cru->queue_buf[i] = NULL;
/* buffer queue */
q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
q->io_modes = VB2_MMAP | VB2_DMABUF;
q->lock = &cru->lock;
q->drv_priv = cru;
q->buf_struct_size = sizeof (struct rzg2l_cru_buffer);
q->ops = &rzg2l_cru_qops;
q->mem_ops = &vb2_dma_contig_memops;
q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
q->min_queued_buffers = 4 ;
q->dev = cru->dev;
ret = vb2_queue_init(q);
if (ret < 0 ) {
dev_err(cru->dev, "failed to initialize VB2 queue\n" );
goto error;
}
return 0 ;
error:
mutex_destroy(&cru->lock);
v4l2_device_unregister(&cru->v4l2_dev);
return ret;
}
/* -----------------------------------------------------------------------------
* V4L2 stuff
*/
static void rzg2l_cru_format_align(struct rzg2l_cru_dev *cru,
struct v4l2_pix_format *pix)
{
const struct rzg2l_cru_info *info = cru->info;
const struct rzg2l_cru_ip_format *fmt;
fmt = rzg2l_cru_ip_format_to_fmt(pix->pixelformat);
if (!fmt) {
pix->pixelformat = RZG2L_CRU_DEFAULT_FORMAT;
fmt = rzg2l_cru_ip_format_to_fmt(pix->pixelformat);
}
switch (pix->field) {
case V4L2_FIELD_TOP:
case V4L2_FIELD_BOTTOM:
case V4L2_FIELD_NONE:
case V4L2_FIELD_INTERLACED_TB:
case V4L2_FIELD_INTERLACED_BT:
case V4L2_FIELD_INTERLACED:
break ;
default :
pix->field = RZG2L_CRU_DEFAULT_FIELD;
break ;
}
/* Limit to CRU capabilities */
v4l_bound_align_image(&pix->width, 320 , info->max_width, 1 ,
&pix->height, 240 , info->max_height, 2 , 0 );
v4l2_fill_pixfmt(pix, pix->pixelformat, pix->width, pix->height);
dev_dbg(cru->dev, "Format %ux%u bpl: %u size: %u\n" ,
pix->width, pix->height, pix->bytesperline, pix->sizeimage);
}
static void rzg2l_cru_try_format(struct rzg2l_cru_dev *cru,
struct v4l2_pix_format *pix)
{
/*
* The V4L2 specification clearly documents the colorspace fields
* as being set by drivers for capture devices . Using the values
* supplied by userspace thus wouldn ' t comply with the API . Until
* the API is updated force fixed values .
*/
pix->colorspace = RZG2L_CRU_DEFAULT_COLORSPACE;
pix->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(pix->colorspace);
pix->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(pix->colorspace);
pix->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true , pix->colorspace,
pix->ycbcr_enc);
rzg2l_cru_format_align(cru, pix);
}
static int rzg2l_cru_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
strscpy(cap->driver, KBUILD_MODNAME, sizeof (cap->driver));
strscpy(cap->card, "RZG2L_CRU" , sizeof (cap->card));
return 0 ;
}
static int rzg2l_cru_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct rzg2l_cru_dev *cru = video_drvdata(file);
rzg2l_cru_try_format(cru, &f->fmt.pix);
return 0 ;
}
static int rzg2l_cru_s_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct rzg2l_cru_dev *cru = video_drvdata(file);
if (vb2_is_busy(&cru->queue))
return -EBUSY;
rzg2l_cru_try_format(cru, &f->fmt.pix);
cru->format = f->fmt.pix;
return 0 ;
}
static int rzg2l_cru_g_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct rzg2l_cru_dev *cru = video_drvdata(file);
f->fmt.pix = cru->format;
return 0 ;
}
static int rzg2l_cru_enum_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
const struct rzg2l_cru_ip_format *fmt;
fmt = rzg2l_cru_ip_index_to_fmt(f->index);
if (!fmt)
return -EINVAL;
f->pixelformat = fmt->format;
return 0 ;
}
static int rzg2l_cru_enum_framesizes(struct file *file, void *fh,
struct v4l2_frmsizeenum *fsize)
{
struct rzg2l_cru_dev *cru = video_drvdata(file);
const struct rzg2l_cru_info *info = cru->info;
const struct rzg2l_cru_ip_format *fmt;
if (fsize->index)
return -EINVAL;
fmt = rzg2l_cru_ip_format_to_fmt(fsize->pixel_format);
if (!fmt)
return -EINVAL;
fsize->type = V4L2_FRMIVAL_TYPE_CONTINUOUS;
fsize->stepwise.min_width = RZG2L_CRU_MIN_INPUT_WIDTH;
fsize->stepwise.max_width = info->max_width;
fsize->stepwise.step_width = 1 ;
fsize->stepwise.min_height = RZG2L_CRU_MIN_INPUT_HEIGHT;
fsize->stepwise.max_height = info->max_height;
fsize->stepwise.step_height = 1 ;
return 0 ;
}
static const struct v4l2_ioctl_ops rzg2l_cru_ioctl_ops = {
.vidioc_querycap = rzg2l_cru_querycap,
.vidioc_try_fmt_vid_cap = rzg2l_cru_try_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = rzg2l_cru_g_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = rzg2l_cru_s_fmt_vid_cap,
.vidioc_enum_fmt_vid_cap = rzg2l_cru_enum_fmt_vid_cap,
.vidioc_reqbufs = vb2_ioctl_reqbufs,
.vidioc_create_bufs = vb2_ioctl_create_bufs,
.vidioc_querybuf = vb2_ioctl_querybuf,
.vidioc_qbuf = vb2_ioctl_qbuf,
.vidioc_dqbuf = vb2_ioctl_dqbuf,
.vidioc_expbuf = vb2_ioctl_expbuf,
.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
.vidioc_streamon = vb2_ioctl_streamon,
.vidioc_streamoff = vb2_ioctl_streamoff,
.vidioc_enum_framesizes = rzg2l_cru_enum_framesizes,
};
/* -----------------------------------------------------------------------------
* Media controller file operations
*/
static int rzg2l_cru_open(struct file *file)
{
struct rzg2l_cru_dev *cru = video_drvdata(file);
int ret;
ret = mutex_lock_interruptible(&cru->lock);
if (ret)
return ret;
file->private_data = cru;
ret = v4l2_fh_open(file);
if (ret)
goto err_unlock;
mutex_unlock(&cru->lock);
return 0 ;
err_unlock:
mutex_unlock(&cru->lock);
return ret;
}
static int rzg2l_cru_release(struct file *file)
{
struct rzg2l_cru_dev *cru = video_drvdata(file);
int ret;
mutex_lock(&cru->lock);
/* the release helper will cleanup any on-going streaming. */
ret = _vb2_fop_release(file, NULL);
mutex_unlock(&cru->lock);
return ret;
}
static const struct v4l2_file_operations rzg2l_cru_fops = {
.owner = THIS_MODULE,
.unlocked_ioctl = video_ioctl2,
.open = rzg2l_cru_open,
.release = rzg2l_cru_release,
.poll = vb2_fop_poll,
.mmap = vb2_fop_mmap,
.read = vb2_fop_read,
};
/* -----------------------------------------------------------------------------
* Media entity operations
*/
static int rzg2l_cru_video_link_validate(struct media_link *link)
{
struct v4l2_subdev_format fmt = {
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
};
const struct rzg2l_cru_ip_format *video_fmt;
struct v4l2_subdev *subdev;
struct rzg2l_cru_dev *cru;
int ret;
subdev = media_entity_to_v4l2_subdev(link->source->entity);
fmt.pad = link->source->index;
ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
if (ret < 0 )
return ret == -ENOIOCTLCMD ? -EINVAL : ret;
cru = container_of(media_entity_to_video_device(link->sink->entity),
struct rzg2l_cru_dev, vdev);
video_fmt = rzg2l_cru_ip_format_to_fmt(cru->format.pixelformat);
if (fmt.format.width != cru->format.width ||
fmt.format.height != cru->format.height ||
fmt.format.field != cru->format.field ||
!rzg2l_cru_ip_fmt_supports_mbus_code(video_fmt, fmt.format.code))
return -EPIPE;
return 0 ;
}
static const struct media_entity_operations rzg2l_cru_video_media_ops = {
.link_validate = rzg2l_cru_video_link_validate,
};
static void rzg2l_cru_v4l2_init(struct rzg2l_cru_dev *cru)
{
struct video_device *vdev = &cru->vdev;
vdev->v4l2_dev = &cru->v4l2_dev;
vdev->queue = &cru->queue;
snprintf(vdev->name, sizeof (vdev->name), "CRU output" );
vdev->release = video_device_release_empty;
vdev->lock = &cru->lock;
vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
vdev->device_caps |= V4L2_CAP_IO_MC;
vdev->entity.ops = &rzg2l_cru_video_media_ops;
vdev->fops = &rzg2l_cru_fops;
vdev->ioctl_ops = &rzg2l_cru_ioctl_ops;
/* Set a default format */
cru->format.pixelformat = RZG2L_CRU_DEFAULT_FORMAT;
cru->format.width = RZG2L_CRU_DEFAULT_WIDTH;
cru->format.height = RZG2L_CRU_DEFAULT_HEIGHT;
cru->format.field = RZG2L_CRU_DEFAULT_FIELD;
cru->format.colorspace = RZG2L_CRU_DEFAULT_COLORSPACE;
rzg2l_cru_format_align(cru, &cru->format);
}
void rzg2l_cru_video_unregister(struct rzg2l_cru_dev *cru)
{
media_device_unregister(&cru->mdev);
video_unregister_device(&cru->vdev);
}
int rzg2l_cru_video_register(struct rzg2l_cru_dev *cru)
{
struct video_device *vdev = &cru->vdev;
int ret;
if (video_is_registered(&cru->vdev)) {
struct media_entity *entity;
entity = &cru->vdev.entity;
if (!entity->graph_obj.mdev)
entity->graph_obj.mdev = &cru->mdev;
return 0 ;
}
rzg2l_cru_v4l2_init(cru);
video_set_drvdata(vdev, cru);
ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1 );
if (ret) {
dev_err(cru->dev, "Failed to register video device\n" );
return ret;
}
ret = media_device_register(&cru->mdev);
if (ret) {
video_unregister_device(&cru->vdev);
return ret;
}
return 0 ;
}
Messung V0.5 in Prozent C=94 H=93 G=93
¤ Dauer der Verarbeitung: 0.31 Sekunden
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