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/*
* Register interface file for EXYNOS FIMC-LITE (camera interface) driver
*
* Copyright (C) 2012 Samsung Electronics Co., Ltd.
* Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <media/drv-intf/exynos-fimc.h>
#include "fimc-lite-reg.h"
#include "fimc-lite.h"
#include "fimc-core.h"
#define FLITE_RESET_TIMEOUT 50 /* in ms */
void flite_hw_reset(struct fimc_lite *dev)
{
unsigned long end = jiffies + msecs_to_jiffies(FLITE_RESET_TIMEOUT);
u32 cfg;
cfg = readl(dev->regs + FLITE_REG_CIGCTRL);
cfg |= FLITE_REG_CIGCTRL_SWRST_REQ;
writel(cfg, dev->regs + FLITE_REG_CIGCTRL);
while (time_is_after_jiffies(end)) {
cfg = readl(dev->regs + FLITE_REG_CIGCTRL);
if (cfg & FLITE_REG_CIGCTRL_SWRST_RDY)
break;
usleep_range(1000, 5000);
}
cfg |= FLITE_REG_CIGCTRL_SWRST;
writel(cfg, dev->regs + FLITE_REG_CIGCTRL);
}
void flite_hw_clear_pending_irq(struct fimc_lite *dev)
{
u32 cfg = readl(dev->regs + FLITE_REG_CISTATUS);
cfg &= ~FLITE_REG_CISTATUS_IRQ_CAM;
writel(cfg, dev->regs + FLITE_REG_CISTATUS);
}
u32 flite_hw_get_interrupt_source(struct fimc_lite *dev)
{
u32 intsrc = readl(dev->regs + FLITE_REG_CISTATUS);
return intsrc & FLITE_REG_CISTATUS_IRQ_MASK;
}
void flite_hw_clear_last_capture_end(struct fimc_lite *dev)
{
u32 cfg = readl(dev->regs + FLITE_REG_CISTATUS2);
cfg &= ~FLITE_REG_CISTATUS2_LASTCAPEND;
writel(cfg, dev->regs + FLITE_REG_CISTATUS2);
}
void flite_hw_set_interrupt_mask(struct fimc_lite *dev)
{
u32 cfg, intsrc;
/* Select interrupts to be enabled for each output mode */
if (atomic_read(&dev->out_path) == FIMC_IO_DMA) {
intsrc = FLITE_REG_CIGCTRL_IRQ_OVFEN |
FLITE_REG_CIGCTRL_IRQ_LASTEN |
FLITE_REG_CIGCTRL_IRQ_STARTEN |
FLITE_REG_CIGCTRL_IRQ_ENDEN;
} else {
/* An output to the FIMC-IS */
intsrc = FLITE_REG_CIGCTRL_IRQ_OVFEN |
FLITE_REG_CIGCTRL_IRQ_LASTEN;
}
cfg = readl(dev->regs + FLITE_REG_CIGCTRL);
cfg |= FLITE_REG_CIGCTRL_IRQ_DISABLE_MASK;
cfg &= ~intsrc;
writel(cfg, dev->regs + FLITE_REG_CIGCTRL);
}
void flite_hw_capture_start(struct fimc_lite *dev)
{
u32 cfg = readl(dev->regs + FLITE_REG_CIIMGCPT);
cfg |= FLITE_REG_CIIMGCPT_IMGCPTEN;
writel(cfg, dev->regs + FLITE_REG_CIIMGCPT);
}
void flite_hw_capture_stop(struct fimc_lite *dev)
{
u32 cfg = readl(dev->regs + FLITE_REG_CIIMGCPT);
cfg &= ~FLITE_REG_CIIMGCPT_IMGCPTEN;
writel(cfg, dev->regs + FLITE_REG_CIIMGCPT);
}
/*
* Test pattern (color bars) enable/disable. External sensor
* pixel clock must be active for the test pattern to work.
*/
void flite_hw_set_test_pattern(struct fimc_lite *dev, bool on)
{
u32 cfg = readl(dev->regs + FLITE_REG_CIGCTRL);
if (on)
cfg |= FLITE_REG_CIGCTRL_TEST_PATTERN_COLORBAR;
else
cfg &= ~FLITE_REG_CIGCTRL_TEST_PATTERN_COLORBAR;
writel(cfg, dev->regs + FLITE_REG_CIGCTRL);
}
static const u32 src_pixfmt_map[8][3] = {
{ MEDIA_BUS_FMT_YUYV8_2X8, FLITE_REG_CISRCSIZE_ORDER422_IN_YCBYCR,
FLITE_REG_CIGCTRL_YUV422_1P },
{ MEDIA_BUS_FMT_YVYU8_2X8, FLITE_REG_CISRCSIZE_ORDER422_IN_YCRYCB,
FLITE_REG_CIGCTRL_YUV422_1P },
{ MEDIA_BUS_FMT_UYVY8_2X8, FLITE_REG_CISRCSIZE_ORDER422_IN_CBYCRY,
FLITE_REG_CIGCTRL_YUV422_1P },
{ MEDIA_BUS_FMT_VYUY8_2X8, FLITE_REG_CISRCSIZE_ORDER422_IN_CRYCBY,
FLITE_REG_CIGCTRL_YUV422_1P },
{ MEDIA_BUS_FMT_SGRBG8_1X8, 0, FLITE_REG_CIGCTRL_RAW8 },
{ MEDIA_BUS_FMT_SGRBG10_1X10, 0, FLITE_REG_CIGCTRL_RAW10 },
{ MEDIA_BUS_FMT_SGRBG12_1X12, 0, FLITE_REG_CIGCTRL_RAW12 },
{ MEDIA_BUS_FMT_JPEG_1X8, 0, FLITE_REG_CIGCTRL_USER(1) },
};
/* Set camera input pixel format and resolution */
void flite_hw_set_source_format(struct fimc_lite *dev, struct flite_frame *f)
{
u32 pixelcode = f->fmt->mbus_code;
int i = ARRAY_SIZE(src_pixfmt_map);
u32 cfg;
while (--i) {
if (src_pixfmt_map[i][0] == pixelcode)
break;
}
if (i == 0 && src_pixfmt_map[i][0] != pixelcode) {
v4l2_err(&dev->ve.vdev,
"Unsupported pixel code, falling back to %#08x\n",
src_pixfmt_map[i][0]);
}
cfg = readl(dev->regs + FLITE_REG_CIGCTRL);
cfg &= ~FLITE_REG_CIGCTRL_FMT_MASK;
cfg |= src_pixfmt_map[i][2];
writel(cfg, dev->regs + FLITE_REG_CIGCTRL);
cfg = readl(dev->regs + FLITE_REG_CISRCSIZE);
cfg &= ~(FLITE_REG_CISRCSIZE_ORDER422_MASK |
FLITE_REG_CISRCSIZE_SIZE_CAM_MASK);
cfg |= (f->f_width << 16) | f->f_height;
cfg |= src_pixfmt_map[i][1];
writel(cfg, dev->regs + FLITE_REG_CISRCSIZE);
}
/* Set the camera host input window offsets (cropping) */
void flite_hw_set_window_offset(struct fimc_lite *dev, struct flite_frame *f)
{
u32 hoff2, voff2;
u32 cfg;
cfg = readl(dev->regs + FLITE_REG_CIWDOFST);
cfg &= ~FLITE_REG_CIWDOFST_OFST_MASK;
cfg |= (f->rect.left << 16) | f->rect.top;
cfg |= FLITE_REG_CIWDOFST_WINOFSEN;
writel(cfg, dev->regs + FLITE_REG_CIWDOFST);
hoff2 = f->f_width - f->rect.width - f->rect.left;
voff2 = f->f_height - f->rect.height - f->rect.top;
cfg = (hoff2 << 16) | voff2;
writel(cfg, dev->regs + FLITE_REG_CIWDOFST2);
}
/* Select camera port (A, B) */
static void flite_hw_set_camera_port(struct fimc_lite *dev, int id)
{
u32 cfg = readl(dev->regs + FLITE_REG_CIGENERAL);
if (id == 0)
cfg &= ~FLITE_REG_CIGENERAL_CAM_B;
else
cfg |= FLITE_REG_CIGENERAL_CAM_B;
writel(cfg, dev->regs + FLITE_REG_CIGENERAL);
}
/* Select serial or parallel bus, camera port (A,B) and set signals polarity */
void flite_hw_set_camera_bus(struct fimc_lite *dev,
struct fimc_source_info *si)
{
u32 cfg = readl(dev->regs + FLITE_REG_CIGCTRL);
unsigned int flags = si->flags;
if (si->sensor_bus_type != FIMC_BUS_TYPE_MIPI_CSI2) {
cfg &= ~(FLITE_REG_CIGCTRL_SELCAM_MIPI |
FLITE_REG_CIGCTRL_INVPOLPCLK |
FLITE_REG_CIGCTRL_INVPOLVSYNC |
FLITE_REG_CIGCTRL_INVPOLHREF);
if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
cfg |= FLITE_REG_CIGCTRL_INVPOLPCLK;
if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
cfg |= FLITE_REG_CIGCTRL_INVPOLVSYNC;
if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
cfg |= FLITE_REG_CIGCTRL_INVPOLHREF;
} else {
cfg |= FLITE_REG_CIGCTRL_SELCAM_MIPI;
}
writel(cfg, dev->regs + FLITE_REG_CIGCTRL);
flite_hw_set_camera_port(dev, si->mux_id);
}
static void flite_hw_set_pack12(struct fimc_lite *dev, int on)
{
u32 cfg = readl(dev->regs + FLITE_REG_CIODMAFMT);
cfg &= ~FLITE_REG_CIODMAFMT_PACK12;
if (on)
cfg |= FLITE_REG_CIODMAFMT_PACK12;
writel(cfg, dev->regs + FLITE_REG_CIODMAFMT);
}
static void flite_hw_set_out_order(struct fimc_lite *dev, struct flite_frame *f)
{
static const u32 pixcode[4][2] = {
{ MEDIA_BUS_FMT_YUYV8_2X8, FLITE_REG_CIODMAFMT_YCBYCR },
{ MEDIA_BUS_FMT_YVYU8_2X8, FLITE_REG_CIODMAFMT_YCRYCB },
{ MEDIA_BUS_FMT_UYVY8_2X8, FLITE_REG_CIODMAFMT_CBYCRY },
{ MEDIA_BUS_FMT_VYUY8_2X8, FLITE_REG_CIODMAFMT_CRYCBY },
};
u32 cfg = readl(dev->regs + FLITE_REG_CIODMAFMT);
int i = ARRAY_SIZE(pixcode);
while (--i)
if (pixcode[i][0] == f->fmt->mbus_code)
break;
cfg &= ~FLITE_REG_CIODMAFMT_YCBCR_ORDER_MASK;
writel(cfg | pixcode[i][1], dev->regs + FLITE_REG_CIODMAFMT);
}
void flite_hw_set_dma_window(struct fimc_lite *dev, struct flite_frame *f)
{
u32 cfg;
/* Maximum output pixel size */
cfg = readl(dev->regs + FLITE_REG_CIOCAN);
cfg &= ~FLITE_REG_CIOCAN_MASK;
cfg |= (f->f_height << 16) | f->f_width;
writel(cfg, dev->regs + FLITE_REG_CIOCAN);
/* DMA offsets */
cfg = readl(dev->regs + FLITE_REG_CIOOFF);
cfg &= ~FLITE_REG_CIOOFF_MASK;
cfg |= (f->rect.top << 16) | f->rect.left;
writel(cfg, dev->regs + FLITE_REG_CIOOFF);
}
void flite_hw_set_dma_buffer(struct fimc_lite *dev, struct flite_buffer *buf)
{
unsigned int index;
u32 cfg;
if (dev->dd->max_dma_bufs == 1)
index = 0;
else
index = buf->index;
if (index == 0)
writel(buf->paddr, dev->regs + FLITE_REG_CIOSA);
else
writel(buf->paddr, dev->regs + FLITE_REG_CIOSAN(index - 1));
cfg = readl(dev->regs + FLITE_REG_CIFCNTSEQ);
cfg |= BIT(index);
writel(cfg, dev->regs + FLITE_REG_CIFCNTSEQ);
}
void flite_hw_mask_dma_buffer(struct fimc_lite *dev, u32 index)
{
u32 cfg;
if (dev->dd->max_dma_bufs == 1)
index = 0;
cfg = readl(dev->regs + FLITE_REG_CIFCNTSEQ);
cfg &= ~BIT(index);
writel(cfg, dev->regs + FLITE_REG_CIFCNTSEQ);
}
/* Enable/disable output DMA, set output pixel size and offsets (composition) */
void flite_hw_set_output_dma(struct fimc_lite *dev, struct flite_frame *f,
bool enable)
{
u32 cfg = readl(dev->regs + FLITE_REG_CIGCTRL);
if (!enable) {
cfg |= FLITE_REG_CIGCTRL_ODMA_DISABLE;
writel(cfg, dev->regs + FLITE_REG_CIGCTRL);
return;
}
cfg &= ~FLITE_REG_CIGCTRL_ODMA_DISABLE;
writel(cfg, dev->regs + FLITE_REG_CIGCTRL);
flite_hw_set_out_order(dev, f);
flite_hw_set_dma_window(dev, f);
flite_hw_set_pack12(dev, 0);
}
void flite_hw_dump_regs(struct fimc_lite *dev, const char *label)
{
struct {
u32 offset;
const char * const name;
} registers[] = {
{ 0x00, "CISRCSIZE" },
{ 0x04, "CIGCTRL" },
{ 0x08, "CIIMGCPT" },
{ 0x0c, "CICPTSEQ" },
{ 0x10, "CIWDOFST" },
{ 0x14, "CIWDOFST2" },
{ 0x18, "CIODMAFMT" },
{ 0x20, "CIOCAN" },
{ 0x24, "CIOOFF" },
{ 0x30, "CIOSA" },
{ 0x40, "CISTATUS" },
{ 0x44, "CISTATUS2" },
{ 0xf0, "CITHOLD" },
{ 0xfc, "CIGENERAL" },
};
u32 i;
v4l2_info(&dev->subdev, "--- %s ---\n", label);
for (i = 0; i < ARRAY_SIZE(registers); i++) {
u32 cfg = readl(dev->regs + registers[i].offset);
v4l2_info(&dev->subdev, "%9s: 0x%08x\n",
registers[i].name, cfg);
}
}
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