// SPDX-License-Identifier: GPL-2.0-only
/*
* ispccp2.c
*
* TI OMAP3 ISP - CCP2 module
*
* Copyright (C) 2010 Nokia Corporation
* Copyright (C) 2010 Texas Instruments, Inc.
*
* Contacts: Laurent Pinchart <[email protected]>
* Sakari Ailus <[email protected]>
*/
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/uaccess.h>
#include <linux/regulator/consumer.h>
#include "isp.h"
#include "ispreg.h"
#include "ispccp2.h"
/* Number of LCX channels */
#define CCP2_LCx_CHANS_NUM 3
/* Max/Min size for CCP2 video port */
#define ISPCCP2_DAT_START_MIN 0
#define ISPCCP2_DAT_START_MAX 4095
#define ISPCCP2_DAT_SIZE_MIN 0
#define ISPCCP2_DAT_SIZE_MAX 4095
#define ISPCCP2_VPCLK_FRACDIV 65536
#define ISPCCP2_LCx_CTRL_FORMAT_RAW8_DPCM10_VP 0x12
#define ISPCCP2_LCx_CTRL_FORMAT_RAW10_VP 0x16
/* Max/Min size for CCP2 memory channel */
#define ISPCCP2_LCM_HSIZE_COUNT_MIN 16
#define ISPCCP2_LCM_HSIZE_COUNT_MAX 8191
#define ISPCCP2_LCM_HSIZE_SKIP_MIN 0
#define ISPCCP2_LCM_HSIZE_SKIP_MAX 8191
#define ISPCCP2_LCM_VSIZE_MIN 1
#define ISPCCP2_LCM_VSIZE_MAX 8191
#define ISPCCP2_LCM_HWORDS_MIN 1
#define ISPCCP2_LCM_HWORDS_MAX 4095
#define ISPCCP2_LCM_CTRL_BURST_SIZE_32X 5
#define ISPCCP2_LCM_CTRL_READ_THROTTLE_FULL 0
#define ISPCCP2_LCM_CTRL_SRC_DECOMPR_DPCM10 2
#define ISPCCP2_LCM_CTRL_SRC_FORMAT_RAW8 2
#define ISPCCP2_LCM_CTRL_SRC_FORMAT_RAW10 3
#define ISPCCP2_LCM_CTRL_DST_FORMAT_RAW10 3
#define ISPCCP2_LCM_CTRL_DST_PORT_VP 0
#define ISPCCP2_LCM_CTRL_DST_PORT_MEM 1
/* Set only the required bits */
#define BIT_SET(var, shift, mask, val) \
do { \
var = ((var) & ~((mask) << (shift))) \
| ((val) << (shift)); \
} while (0)
/*
* ccp2_print_status - Print current CCP2 module register values.
*/
#define CCP2_PRINT_REGISTER(isp, name)\
dev_dbg(isp->dev, "###CCP2 " #name "=0x%08x\n", \
isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_##name))
static void ccp2_print_status(struct isp_ccp2_device *ccp2)
{
struct isp_device *isp = to_isp_device(ccp2);
dev_dbg(isp->dev, "-------------CCP2 Register dump-------------\n");
CCP2_PRINT_REGISTER(isp, SYSCONFIG);
CCP2_PRINT_REGISTER(isp, SYSSTATUS);
CCP2_PRINT_REGISTER(isp, LC01_IRQENABLE);
CCP2_PRINT_REGISTER(isp, LC01_IRQSTATUS);
CCP2_PRINT_REGISTER(isp, LC23_IRQENABLE);
CCP2_PRINT_REGISTER(isp, LC23_IRQSTATUS);
CCP2_PRINT_REGISTER(isp, LCM_IRQENABLE);
CCP2_PRINT_REGISTER(isp, LCM_IRQSTATUS);
CCP2_PRINT_REGISTER(isp, CTRL);
CCP2_PRINT_REGISTER(isp, LCx_CTRL(0));
CCP2_PRINT_REGISTER(isp, LCx_CODE(0));
CCP2_PRINT_REGISTER(isp, LCx_STAT_START(0));
CCP2_PRINT_REGISTER(isp, LCx_STAT_SIZE(0));
CCP2_PRINT_REGISTER(isp, LCx_SOF_ADDR(0));
CCP2_PRINT_REGISTER(isp, LCx_EOF_ADDR(0));
CCP2_PRINT_REGISTER(isp, LCx_DAT_START(0));
CCP2_PRINT_REGISTER(isp, LCx_DAT_SIZE(0));
CCP2_PRINT_REGISTER(isp, LCx_DAT_PING_ADDR(0));
CCP2_PRINT_REGISTER(isp, LCx_DAT_PONG_ADDR(0));
CCP2_PRINT_REGISTER(isp, LCx_DAT_OFST(0));
CCP2_PRINT_REGISTER(isp, LCM_CTRL);
CCP2_PRINT_REGISTER(isp, LCM_VSIZE);
CCP2_PRINT_REGISTER(isp, LCM_HSIZE);
CCP2_PRINT_REGISTER(isp, LCM_PREFETCH);
CCP2_PRINT_REGISTER(isp, LCM_SRC_ADDR);
CCP2_PRINT_REGISTER(isp, LCM_SRC_OFST);
CCP2_PRINT_REGISTER(isp, LCM_DST_ADDR);
CCP2_PRINT_REGISTER(isp, LCM_DST_OFST);
dev_dbg(isp->dev, "--------------------------------------------\n");
}
/*
* ccp2_reset - Reset the CCP2
* @ccp2: pointer to ISP CCP2 device
*/
static void ccp2_reset(struct isp_ccp2_device *ccp2)
{
struct isp_device *isp = to_isp_device(ccp2);
int i = 0;
/* Reset the CSI1/CCP2B and wait for reset to complete */
isp_reg_set(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_SYSCONFIG,
ISPCCP2_SYSCONFIG_SOFT_RESET);
while (!(isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_SYSSTATUS) &
ISPCCP2_SYSSTATUS_RESET_DONE)) {
udelay(10);
if (i++ > 10) { /* try read 10 times */
dev_warn(isp->dev,
"omap3_isp: timeout waiting for ccp2 reset\n");
break;
}
}
}
/*
* ccp2_pwr_cfg - Configure the power mode settings
* @ccp2: pointer to ISP CCP2 device
*/
static void ccp2_pwr_cfg(struct isp_ccp2_device *ccp2)
{
struct isp_device *isp = to_isp_device(ccp2);
isp_reg_writel(isp, ISPCCP2_SYSCONFIG_MSTANDBY_MODE_SMART |
((isp->revision == ISP_REVISION_15_0 && isp->autoidle) ?
ISPCCP2_SYSCONFIG_AUTO_IDLE : 0),
OMAP3_ISP_IOMEM_CCP2, ISPCCP2_SYSCONFIG);
}
/*
* ccp2_if_enable - Enable CCP2 interface.
* @ccp2: pointer to ISP CCP2 device
* @enable: enable/disable flag
*/
static int ccp2_if_enable(struct isp_ccp2_device *ccp2, u8 enable)
{
struct isp_device *isp = to_isp_device(ccp2);
int ret;
int i;
if (enable && ccp2->vdds_csib) {
ret = regulator_enable(ccp2->vdds_csib);
if (ret < 0)
return ret;
}
/* Enable/Disable all the LCx channels */
for (i = 0; i < CCP2_LCx_CHANS_NUM; i++)
isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_LCx_CTRL(i),
ISPCCP2_LCx_CTRL_CHAN_EN,
enable ? ISPCCP2_LCx_CTRL_CHAN_EN : 0);
/* Enable/Disable ccp2 interface in ccp2 mode */
isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_CTRL,
ISPCCP2_CTRL_MODE | ISPCCP2_CTRL_IF_EN,
enable ? (ISPCCP2_CTRL_MODE | ISPCCP2_CTRL_IF_EN) : 0);
if (!enable && ccp2->vdds_csib)
regulator_disable(ccp2->vdds_csib);
return 0;
}
/*
* ccp2_mem_enable - Enable CCP2 memory interface.
* @ccp2: pointer to ISP CCP2 device
* @enable: enable/disable flag
*/
static void ccp2_mem_enable(struct isp_ccp2_device *ccp2, u8 enable)
{
struct isp_device *isp = to_isp_device(ccp2);
if (enable)
ccp2_if_enable(ccp2, 0);
/* Enable/Disable ccp2 interface in ccp2 mode */
isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_CTRL,
ISPCCP2_CTRL_MODE, enable ? ISPCCP2_CTRL_MODE : 0);
isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_LCM_CTRL,
ISPCCP2_LCM_CTRL_CHAN_EN,
enable ? ISPCCP2_LCM_CTRL_CHAN_EN : 0);
}
/*
* ccp2_phyif_config - Initialize CCP2 phy interface config
* @ccp2: Pointer to ISP CCP2 device
* @buscfg: CCP2 platform data
*
* Configure the CCP2 physical interface module from platform data.
*
* Returns -EIO if strobe is chosen in CSI1 mode, or 0 on success.
*/
static int ccp2_phyif_config(struct isp_ccp2_device *ccp2,
const struct isp_ccp2_cfg *buscfg)
{
struct isp_device *isp = to_isp_device(ccp2);
u32 val;
val = isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_CTRL) |
ISPCCP2_CTRL_MODE;
/* Data/strobe physical layer */
BIT_SET(val, ISPCCP2_CTRL_PHY_SEL_SHIFT, ISPCCP2_CTRL_PHY_SEL_MASK,
buscfg->phy_layer);
BIT_SET(val, ISPCCP2_CTRL_IO_OUT_SEL_SHIFT,
ISPCCP2_CTRL_IO_OUT_SEL_MASK, buscfg->ccp2_mode);
BIT_SET(val, ISPCCP2_CTRL_INV_SHIFT, ISPCCP2_CTRL_INV_MASK,
buscfg->strobe_clk_pol);
BIT_SET(val, ISPCCP2_CTRL_VP_CLK_POL_SHIFT,
ISPCCP2_CTRL_VP_CLK_POL_MASK, buscfg->vp_clk_pol);
isp_reg_writel(isp, val, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_CTRL);
val = isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_CTRL);
if (!(val & ISPCCP2_CTRL_MODE)) {
if (buscfg->ccp2_mode == ISP_CCP2_MODE_CCP2)
dev_warn(isp->dev, "OMAP3 CCP2 bus not available\n");
if (buscfg->phy_layer == ISP_CCP2_PHY_DATA_STROBE)
/* Strobe mode requires CCP2 */
return -EIO;
}
return 0;
}
/*
* ccp2_vp_config - Initialize CCP2 video port interface.
* @ccp2: Pointer to ISP CCP2 device
* @vpclk_div: Video port divisor
*
* Configure the CCP2 video port with the given clock divisor. The valid divisor
* values depend on the ISP revision:
*
* - revision 1.0 and 2.0 1 to 4
* - revision 15.0 1 to 65536
*
* The exact divisor value used might differ from the requested value, as ISP
* revision 15.0 represent the divisor by 65536 divided by an integer.
*/
static void ccp2_vp_config(struct isp_ccp2_device *ccp2,
unsigned int vpclk_div)
{
struct isp_device *isp = to_isp_device(ccp2);
u32 val;
/* ISPCCP2_CTRL Video port */
val = isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_CTRL);
val |= ISPCCP2_CTRL_VP_ONLY_EN; /* Disable the memory write port */
if (isp->revision == ISP_REVISION_15_0) {
vpclk_div = clamp_t(unsigned int, vpclk_div, 1, 65536);
vpclk_div = min(ISPCCP2_VPCLK_FRACDIV / vpclk_div, 65535U);
BIT_SET(val, ISPCCP2_CTRL_VPCLK_DIV_SHIFT,
ISPCCP2_CTRL_VPCLK_DIV_MASK, vpclk_div);
} else {
vpclk_div = clamp_t(unsigned int, vpclk_div, 1, 4);
BIT_SET(val, ISPCCP2_CTRL_VP_OUT_CTRL_SHIFT,
ISPCCP2_CTRL_VP_OUT_CTRL_MASK, vpclk_div - 1);
}
isp_reg_writel(isp, val, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_CTRL);
}
/*
* ccp2_lcx_config - Initialize CCP2 logical channel interface.
* @ccp2: Pointer to ISP CCP2 device
* @config: Pointer to ISP LCx config structure.
*
* This will analyze the parameters passed by the interface config
* and configure CSI1/CCP2 logical channel
*
*/
static void ccp2_lcx_config(struct isp_ccp2_device *ccp2,
struct isp_interface_lcx_config *config)
{
struct isp_device *isp = to_isp_device(ccp2);
u32 val, format;
switch (config->format) {
case MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8:
format = ISPCCP2_LCx_CTRL_FORMAT_RAW8_DPCM10_VP;
break;
case MEDIA_BUS_FMT_SGRBG10_1X10:
default:
format = ISPCCP2_LCx_CTRL_FORMAT_RAW10_VP; /* RAW10+VP */
break;
}
/* ISPCCP2_LCx_CTRL logical channel #0 */
val = isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_LCx_CTRL(0))
| (ISPCCP2_LCx_CTRL_REGION_EN); /* Region */
if (isp->revision == ISP_REVISION_15_0) {
/* CRC */
BIT_SET(val, ISPCCP2_LCx_CTRL_CRC_SHIFT_15_0,
ISPCCP2_LCx_CTRL_CRC_MASK,
config->crc);
/* Format = RAW10+VP or RAW8+DPCM10+VP*/
BIT_SET(val, ISPCCP2_LCx_CTRL_FORMAT_SHIFT_15_0,
ISPCCP2_LCx_CTRL_FORMAT_MASK_15_0, format);
} else {
BIT_SET(val, ISPCCP2_LCx_CTRL_CRC_SHIFT,
ISPCCP2_LCx_CTRL_CRC_MASK,
config->crc);
BIT_SET(val, ISPCCP2_LCx_CTRL_FORMAT_SHIFT,
ISPCCP2_LCx_CTRL_FORMAT_MASK, format);
}
isp_reg_writel(isp, val, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_LCx_CTRL(0));
/* ISPCCP2_DAT_START for logical channel #0 */
isp_reg_writel(isp, config->data_start << ISPCCP2_LCx_DAT_SHIFT,
OMAP3_ISP_IOMEM_CCP2, ISPCCP2_LCx_DAT_START(0));
/* ISPCCP2_DAT_SIZE for logical channel #0 */
isp_reg_writel(isp, config->data_size << ISPCCP2_LCx_DAT_SHIFT,
OMAP3_ISP_IOMEM_CCP2, ISPCCP2_LCx_DAT_SIZE(0));
/* Enable error IRQs for logical channel #0 */
val = ISPCCP2_LC01_IRQSTATUS_LC0_FIFO_OVF_IRQ |
ISPCCP2_LC01_IRQSTATUS_LC0_CRC_IRQ |
ISPCCP2_LC01_IRQSTATUS_LC0_FSP_IRQ |
ISPCCP2_LC01_IRQSTATUS_LC0_FW_IRQ |
ISPCCP2_LC01_IRQSTATUS_LC0_FSC_IRQ |
ISPCCP2_LC01_IRQSTATUS_LC0_SSC_IRQ;
isp_reg_writel(isp, val, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_LC01_IRQSTATUS);
isp_reg_set(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_LC01_IRQENABLE, val);
}
/*
* ccp2_if_configure - Configure ccp2 with data from sensor
* @ccp2: Pointer to ISP CCP2 device
*
* Return 0 on success or a negative error code
*/
static int ccp2_if_configure(struct isp_ccp2_device *ccp2)
{
struct isp_pipeline *pipe = to_isp_pipeline(&ccp2->subdev.entity);
const struct isp_bus_cfg *buscfg;
struct v4l2_mbus_framefmt *format;
struct media_pad *pad;
struct v4l2_subdev *sensor;
u32 lines = 0;
int ret;
ccp2_pwr_cfg(ccp2);
pad = media_pad_remote_pad_first(&ccp2->pads[CCP2_PAD_SINK]);
sensor = media_entity_to_v4l2_subdev(pad->entity);
buscfg = v4l2_subdev_to_bus_cfg(pipe->external);
if (WARN_ON(!buscfg))
return -EPIPE;
ret = ccp2_phyif_config(ccp2, &buscfg->bus.ccp2);
if (ret < 0)
return ret;
ccp2_vp_config(ccp2, buscfg->bus.ccp2.vpclk_div + 1);
v4l2_subdev_call(sensor, sensor, g_skip_top_lines, &lines);
format = &ccp2->formats[CCP2_PAD_SINK];
ccp2->if_cfg.data_start = lines;
ccp2->if_cfg.crc = buscfg->bus.ccp2.crc;
ccp2->if_cfg.format = format->code;
ccp2->if_cfg.data_size = format->height;
ccp2_lcx_config(ccp2, &ccp2->if_cfg);
return 0;
}
static int ccp2_adjust_bandwidth(struct isp_ccp2_device *ccp2)
{
struct isp_pipeline *pipe = to_isp_pipeline(&ccp2->subdev.entity);
struct isp_device *isp = to_isp_device(ccp2);
const struct v4l2_mbus_framefmt *ofmt = &ccp2->formats[CCP2_PAD_SOURCE];
unsigned long l3_ick = pipe->l3_ick;
struct v4l2_fract *timeperframe;
unsigned int vpclk_div = 2;
unsigned int value;
u64 bound;
u64 area;
/* Compute the minimum clock divisor, based on the pipeline maximum
* data rate. This is an absolute lower bound if we don't want SBL
* overflows, so round the value up.
*/
vpclk_div = max_t(unsigned int, DIV_ROUND_UP(l3_ick, pipe->max_rate),
vpclk_div);
/* Compute the maximum clock divisor, based on the requested frame rate.
* This is a soft lower bound to achieve a frame rate equal or higher
* than the requested value, so round the value down.
*/
timeperframe = &pipe->max_timeperframe;
if (timeperframe->numerator) {
area = ofmt->width * ofmt->height;
bound = div_u64(area * timeperframe->denominator,
timeperframe->numerator);
value = min_t(u64, bound, l3_ick);
vpclk_div = max_t(unsigned int, l3_ick / value, vpclk_div);
}
dev_dbg(isp->dev, "%s: minimum clock divisor = %u\n", __func__,
vpclk_div);
return vpclk_div;
}
/*
* ccp2_mem_configure - Initialize CCP2 memory input/output interface
* @ccp2: Pointer to ISP CCP2 device
* @config: Pointer to ISP mem interface config structure
*
* This will analyze the parameters passed by the interface config
* structure, and configure the respective registers for proper
* CSI1/CCP2 memory input.
*/
static void ccp2_mem_configure(struct isp_ccp2_device *ccp2,
struct isp_interface_mem_config *config)
{
struct isp_device *isp = to_isp_device(ccp2);
u32 sink_pixcode = ccp2->formats[CCP2_PAD_SINK].code;
u32 source_pixcode = ccp2->formats[CCP2_PAD_SOURCE].code;
unsigned int dpcm_decompress = 0;
u32 val, hwords;
if (sink_pixcode != source_pixcode &&
sink_pixcode == MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8)
dpcm_decompress = 1;
ccp2_pwr_cfg(ccp2);
/* Hsize, Skip */
isp_reg_writel(isp, ISPCCP2_LCM_HSIZE_SKIP_MIN |
(config->hsize_count << ISPCCP2_LCM_HSIZE_SHIFT),
OMAP3_ISP_IOMEM_CCP2, ISPCCP2_LCM_HSIZE);
/* Vsize, no. of lines */
isp_reg_writel(isp, config->vsize_count << ISPCCP2_LCM_VSIZE_SHIFT,
OMAP3_ISP_IOMEM_CCP2, ISPCCP2_LCM_VSIZE);
if (ccp2->video_in.bpl_padding == 0)
config->src_ofst = 0;
else
config->src_ofst = ccp2->video_in.bpl_value;
isp_reg_writel(isp, config->src_ofst, OMAP3_ISP_IOMEM_CCP2,
ISPCCP2_LCM_SRC_OFST);
/* Source and Destination formats */
val = ISPCCP2_LCM_CTRL_DST_FORMAT_RAW10 <<
ISPCCP2_LCM_CTRL_DST_FORMAT_SHIFT;
if (dpcm_decompress) {
/* source format is RAW8 */
val |= ISPCCP2_LCM_CTRL_SRC_FORMAT_RAW8 <<
ISPCCP2_LCM_CTRL_SRC_FORMAT_SHIFT;
/* RAW8 + DPCM10 - simple predictor */
val |= ISPCCP2_LCM_CTRL_SRC_DPCM_PRED;
/* enable source DPCM decompression */
val |= ISPCCP2_LCM_CTRL_SRC_DECOMPR_DPCM10 <<
ISPCCP2_LCM_CTRL_SRC_DECOMPR_SHIFT;
} else {
/* source format is RAW10 */
val |= ISPCCP2_LCM_CTRL_SRC_FORMAT_RAW10 <<
ISPCCP2_LCM_CTRL_SRC_FORMAT_SHIFT;
}
/* Burst size to 32x64 */
val |= ISPCCP2_LCM_CTRL_BURST_SIZE_32X <<
ISPCCP2_LCM_CTRL_BURST_SIZE_SHIFT;
isp_reg_writel(isp, val, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_LCM_CTRL);
/* Prefetch setup */
if (dpcm_decompress)
hwords = (ISPCCP2_LCM_HSIZE_SKIP_MIN +
config->hsize_count) >> 3;
else
hwords = (ISPCCP2_LCM_HSIZE_SKIP_MIN +
config->hsize_count) >> 2;
isp_reg_writel(isp, hwords << ISPCCP2_LCM_PREFETCH_SHIFT,
OMAP3_ISP_IOMEM_CCP2, ISPCCP2_LCM_PREFETCH);
/* Video port */
isp_reg_set(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_CTRL,
ISPCCP2_CTRL_IO_OUT_SEL | ISPCCP2_CTRL_MODE);
ccp2_vp_config(ccp2, ccp2_adjust_bandwidth(ccp2));
/* Clear LCM interrupts */
isp_reg_writel(isp, ISPCCP2_LCM_IRQSTATUS_OCPERROR_IRQ |
ISPCCP2_LCM_IRQSTATUS_EOF_IRQ,
OMAP3_ISP_IOMEM_CCP2, ISPCCP2_LCM_IRQSTATUS);
/* Enable LCM interrupts */
isp_reg_set(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_LCM_IRQENABLE,
ISPCCP2_LCM_IRQSTATUS_EOF_IRQ |
ISPCCP2_LCM_IRQSTATUS_OCPERROR_IRQ);
}
/*
* ccp2_set_inaddr - Sets memory address of input frame.
* @ccp2: Pointer to ISP CCP2 device
* @addr: 32bit memory address aligned on 32byte boundary.
*
* Configures the memory address from which the input frame is to be read.
*/
static void ccp2_set_inaddr(struct isp_ccp2_device *ccp2, u32 addr)
{
struct isp_device *isp = to_isp_device(ccp2);
isp_reg_writel(isp, addr, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_LCM_SRC_ADDR);
}
/* -----------------------------------------------------------------------------
* Interrupt handling
*/
static void ccp2_isr_buffer(struct isp_ccp2_device *ccp2)
{
struct isp_pipeline *pipe = to_isp_pipeline(&ccp2->subdev.entity);
struct isp_buffer *buffer;
buffer = omap3isp_video_buffer_next(&ccp2->video_in);
if (buffer != NULL)
ccp2_set_inaddr(ccp2, buffer->dma);
pipe->state |= ISP_PIPELINE_IDLE_INPUT;
if (ccp2->state == ISP_PIPELINE_STREAM_SINGLESHOT) {
if (isp_pipeline_ready(pipe))
omap3isp_pipeline_set_stream(pipe,
ISP_PIPELINE_STREAM_SINGLESHOT);
}
}
/*
* omap3isp_ccp2_isr - Handle ISP CCP2 interrupts
* @ccp2: Pointer to ISP CCP2 device
*
* This will handle the CCP2 interrupts
*/
void omap3isp_ccp2_isr(struct isp_ccp2_device *ccp2)
{
struct isp_pipeline *pipe = to_isp_pipeline(&ccp2->subdev.entity);
struct isp_device *isp = to_isp_device(ccp2);
static const u32 ISPCCP2_LC01_ERROR =
ISPCCP2_LC01_IRQSTATUS_LC0_FIFO_OVF_IRQ |
ISPCCP2_LC01_IRQSTATUS_LC0_CRC_IRQ |
ISPCCP2_LC01_IRQSTATUS_LC0_FSP_IRQ |
ISPCCP2_LC01_IRQSTATUS_LC0_FW_IRQ |
ISPCCP2_LC01_IRQSTATUS_LC0_FSC_IRQ |
ISPCCP2_LC01_IRQSTATUS_LC0_SSC_IRQ;
u32 lcx_irqstatus, lcm_irqstatus;
/* First clear the interrupts */
lcx_irqstatus = isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCP2,
ISPCCP2_LC01_IRQSTATUS);
isp_reg_writel(isp, lcx_irqstatus, OMAP3_ISP_IOMEM_CCP2,
ISPCCP2_LC01_IRQSTATUS);
lcm_irqstatus = isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCP2,
ISPCCP2_LCM_IRQSTATUS);
isp_reg_writel(isp, lcm_irqstatus, OMAP3_ISP_IOMEM_CCP2,
ISPCCP2_LCM_IRQSTATUS);
/* Errors */
if (lcx_irqstatus & ISPCCP2_LC01_ERROR) {
pipe->error = true;
dev_dbg(isp->dev, "CCP2 err:%x\n", lcx_irqstatus);
return;
}
if (lcm_irqstatus & ISPCCP2_LCM_IRQSTATUS_OCPERROR_IRQ) {
pipe->error = true;
dev_dbg(isp->dev, "CCP2 OCP err:%x\n", lcm_irqstatus);
}
if (omap3isp_module_sync_is_stopping(&ccp2->wait, &ccp2->stopping))
return;
/* Handle queued buffers on frame end interrupts */
if (lcm_irqstatus & ISPCCP2_LCM_IRQSTATUS_EOF_IRQ)
ccp2_isr_buffer(ccp2);
}
/* -----------------------------------------------------------------------------
* V4L2 subdev operations
*/
static const unsigned int ccp2_fmts[] = {
MEDIA_BUS_FMT_SGRBG10_1X10,
MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
};
/*
* __ccp2_get_format - helper function for getting ccp2 format
* @ccp2 : Pointer to ISP CCP2 device
* @sd_state: V4L2 subdev state
* @pad : pad number
* @which : wanted subdev format
* return format structure or NULL on error
*/
static struct v4l2_mbus_framefmt *
__ccp2_get_format(struct isp_ccp2_device *ccp2,
struct v4l2_subdev_state *sd_state,
unsigned int pad, enum v4l2_subdev_format_whence which)
{
if (which == V4L2_SUBDEV_FORMAT_TRY)
return v4l2_subdev_state_get_format(sd_state, pad);
else
return &ccp2->formats[pad];
}
/*
* ccp2_try_format - Handle try format by pad subdev method
* @ccp2 : Pointer to ISP CCP2 device
* @sd_state: V4L2 subdev state
* @pad : pad num
* @fmt : pointer to v4l2 mbus format structure
* @which : wanted subdev format
*/
static void ccp2_try_format(struct isp_ccp2_device *ccp2,
struct v4l2_subdev_state *sd_state,
unsigned int pad,
struct v4l2_mbus_framefmt *fmt,
enum v4l2_subdev_format_whence which)
{
struct v4l2_mbus_framefmt *format;
switch (pad) {
case CCP2_PAD_SINK:
if (fmt->code != MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8)
fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
if (ccp2->input == CCP2_INPUT_SENSOR) {
fmt->width = clamp_t(u32, fmt->width,
ISPCCP2_DAT_START_MIN,
ISPCCP2_DAT_START_MAX);
fmt->height = clamp_t(u32, fmt->height,
ISPCCP2_DAT_SIZE_MIN,
ISPCCP2_DAT_SIZE_MAX);
} else if (ccp2->input == CCP2_INPUT_MEMORY) {
fmt->width = clamp_t(u32, fmt->width,
ISPCCP2_LCM_HSIZE_COUNT_MIN,
ISPCCP2_LCM_HSIZE_COUNT_MAX);
fmt->height = clamp_t(u32, fmt->height,
ISPCCP2_LCM_VSIZE_MIN,
ISPCCP2_LCM_VSIZE_MAX);
}
break;
case CCP2_PAD_SOURCE:
/* Source format - copy sink format and change pixel code
* to SGRBG10_1X10 as we don't support CCP2 write to memory.
* When CCP2 write to memory feature will be added this
* should be changed properly.
*/
format = __ccp2_get_format(ccp2, sd_state, CCP2_PAD_SINK,
which);
memcpy(fmt, format, sizeof(*fmt));
fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
break;
}
fmt->field = V4L2_FIELD_NONE;
fmt->colorspace = V4L2_COLORSPACE_SRGB;
}
/*
* ccp2_enum_mbus_code - Handle pixel format enumeration
* @sd : pointer to v4l2 subdev structure
* @sd_state: V4L2 subdev state
* @code : pointer to v4l2_subdev_mbus_code_enum structure
* return -EINVAL or zero on success
*/
static int ccp2_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
struct isp_ccp2_device *ccp2 = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt *format;
if (code->pad == CCP2_PAD_SINK) {
if (code->index >= ARRAY_SIZE(ccp2_fmts))
return -EINVAL;
code->code = ccp2_fmts[code->index];
} else {
if (code->index != 0)
return -EINVAL;
format = __ccp2_get_format(ccp2, sd_state, CCP2_PAD_SINK,
code->which);
code->code = format->code;
}
return 0;
}
static int ccp2_enum_frame_size(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_size_enum *fse)
{
struct isp_ccp2_device *ccp2 = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt format;
if (fse->index != 0)
return -EINVAL;
format.code = fse->code;
format.width = 1;
format.height = 1;
ccp2_try_format(ccp2, sd_state, fse->pad, &format, fse->which);
fse->min_width = format.width;
fse->min_height = format.height;
if (format.code != fse->code)
return -EINVAL;
format.code = fse->code;
format.width = -1;
format.height = -1;
ccp2_try_format(ccp2, sd_state, fse->pad, &format, fse->which);
fse->max_width = format.width;
fse->max_height = format.height;
return 0;
}
/*
* ccp2_get_format - Handle get format by pads subdev method
* @sd : pointer to v4l2 subdev structure
* @sd_state: V4L2 subdev state
* @fmt : pointer to v4l2 subdev format structure
* return -EINVAL or zero on success
*/
static int ccp2_get_format(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct isp_ccp2_device *ccp2 = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt *format;
format = __ccp2_get_format(ccp2, sd_state, fmt->pad, fmt->which);
if (format == NULL)
return -EINVAL;
fmt->format = *format;
return 0;
}
/*
* ccp2_set_format - Handle set format by pads subdev method
* @sd : pointer to v4l2 subdev structure
* @sd_state: V4L2 subdev state
* @fmt : pointer to v4l2 subdev format structure
* returns zero
*/
static int ccp2_set_format(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct isp_ccp2_device *ccp2 = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt *format;
format = __ccp2_get_format(ccp2, sd_state, fmt->pad, fmt->which);
if (format == NULL)
return -EINVAL;
ccp2_try_format(ccp2, sd_state, fmt->pad, &fmt->format, fmt->which);
*format = fmt->format;
/* Propagate the format from sink to source */
if (fmt->pad == CCP2_PAD_SINK) {
format = __ccp2_get_format(ccp2, sd_state, CCP2_PAD_SOURCE,
fmt->which);
*format = fmt->format;
ccp2_try_format(ccp2, sd_state, CCP2_PAD_SOURCE, format,
fmt->which);
}
return 0;
}
/*
* ccp2_init_formats - Initialize formats on all pads
* @sd: ISP CCP2 V4L2 subdevice
* @fh: V4L2 subdev file handle
*
* Initialize all pad formats with default values. If fh is not NULL, try
* formats are initialized on the file handle. Otherwise active formats are
* initialized on the device.
*/
static int ccp2_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
struct v4l2_subdev_format format;
memset(&format, 0, sizeof(format));
format.pad = CCP2_PAD_SINK;
format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
format.format.code = MEDIA_BUS_FMT_SGRBG10_1X10;
format.format.width = 4096;
format.format.height = 4096;
ccp2_set_format(sd, fh ? fh->state : NULL, &format);
return 0;
}
/*
* ccp2_s_stream - Enable/Disable streaming on ccp2 subdev
* @sd : pointer to v4l2 subdev structure
* @enable: 1 == Enable, 0 == Disable
* return zero
*/
static int ccp2_s_stream(struct v4l2_subdev *sd, int enable)
{
struct isp_ccp2_device *ccp2 = v4l2_get_subdevdata(sd);
struct isp_device *isp = to_isp_device(ccp2);
struct device *dev = to_device(ccp2);
int ret;
if (ccp2->state == ISP_PIPELINE_STREAM_STOPPED) {
if (enable == ISP_PIPELINE_STREAM_STOPPED)
return 0;
atomic_set(&ccp2->stopping, 0);
}
switch (enable) {
case ISP_PIPELINE_STREAM_CONTINUOUS:
if (ccp2->phy) {
ret = omap3isp_csiphy_acquire(ccp2->phy, &sd->entity);
if (ret < 0)
return ret;
}
ccp2_if_configure(ccp2);
ccp2_print_status(ccp2);
/* Enable CSI1/CCP2 interface */
ret = ccp2_if_enable(ccp2, 1);
if (ret < 0) {
if (ccp2->phy)
omap3isp_csiphy_release(ccp2->phy);
return ret;
}
break;
case ISP_PIPELINE_STREAM_SINGLESHOT:
if (ccp2->state != ISP_PIPELINE_STREAM_SINGLESHOT) {
struct v4l2_mbus_framefmt *format;
format = &ccp2->formats[CCP2_PAD_SINK];
ccp2->mem_cfg.hsize_count = format->width;
ccp2->mem_cfg.vsize_count = format->height;
ccp2->mem_cfg.src_ofst = 0;
ccp2_mem_configure(ccp2, &ccp2->mem_cfg);
omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_CSI1_READ);
ccp2_print_status(ccp2);
}
ccp2_mem_enable(ccp2, 1);
break;
case ISP_PIPELINE_STREAM_STOPPED:
if (omap3isp_module_sync_idle(&sd->entity, &ccp2->wait,
&ccp2->stopping))
dev_dbg(dev, "%s: module stop timeout.\n", sd->name);
if (ccp2->input == CCP2_INPUT_MEMORY) {
ccp2_mem_enable(ccp2, 0);
omap3isp_sbl_disable(isp, OMAP3_ISP_SBL_CSI1_READ);
} else if (ccp2->input == CCP2_INPUT_SENSOR) {
/* Disable CSI1/CCP2 interface */
ccp2_if_enable(ccp2, 0);
if (ccp2->phy)
omap3isp_csiphy_release(ccp2->phy);
}
break;
}
ccp2->state = enable;
return 0;
}
/* subdev video operations */
static const struct v4l2_subdev_video_ops ccp2_sd_video_ops = {
.s_stream = ccp2_s_stream,
};
/* subdev pad operations */
static const struct v4l2_subdev_pad_ops ccp2_sd_pad_ops = {
.enum_mbus_code = ccp2_enum_mbus_code,
.enum_frame_size = ccp2_enum_frame_size,
.get_fmt = ccp2_get_format,
.set_fmt = ccp2_set_format,
};
/* subdev operations */
static const struct v4l2_subdev_ops ccp2_sd_ops = {
.video = &ccp2_sd_video_ops,
.pad = &ccp2_sd_pad_ops,
};
/* subdev internal operations */
static const struct v4l2_subdev_internal_ops ccp2_sd_internal_ops = {
.open = ccp2_init_formats,
};
/* --------------------------------------------------------------------------
* ISP ccp2 video device node
*/
/*
* ccp2_video_queue - Queue video buffer.
* @video : Pointer to isp video structure
* @buffer: Pointer to isp_buffer structure
* return -EIO or zero on success
*/
static int ccp2_video_queue(struct isp_video *video, struct isp_buffer *buffer)
{
struct isp_ccp2_device *ccp2 = &video->isp->isp_ccp2;
ccp2_set_inaddr(ccp2, buffer->dma);
return 0;
}
static const struct isp_video_operations ccp2_video_ops = {
.queue = ccp2_video_queue,
};
/* -----------------------------------------------------------------------------
* Media entity operations
*/
/*
* ccp2_link_setup - Setup ccp2 connections.
* @entity : Pointer to media entity structure
* @local : Pointer to local pad array
* @remote : Pointer to remote pad array
* @flags : Link flags
* return -EINVAL on error or zero on success
*/
static int ccp2_link_setup(struct media_entity *entity,
const struct media_pad *local,
const struct media_pad *remote, u32 flags)
{
struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
struct isp_ccp2_device *ccp2 = v4l2_get_subdevdata(sd);
unsigned int index = local->index;
/* FIXME: this is actually a hack! */
if (is_media_entity_v4l2_subdev(remote->entity))
index |= 2 << 16;
switch (index) {
case CCP2_PAD_SINK:
/* read from memory */
if (flags & MEDIA_LNK_FL_ENABLED) {
if (ccp2->input == CCP2_INPUT_SENSOR)
return -EBUSY;
ccp2->input = CCP2_INPUT_MEMORY;
} else {
if (ccp2->input == CCP2_INPUT_MEMORY)
ccp2->input = CCP2_INPUT_NONE;
}
break;
case CCP2_PAD_SINK | 2 << 16:
/* read from sensor/phy */
if (flags & MEDIA_LNK_FL_ENABLED) {
if (ccp2->input == CCP2_INPUT_MEMORY)
return -EBUSY;
ccp2->input = CCP2_INPUT_SENSOR;
} else {
if (ccp2->input == CCP2_INPUT_SENSOR)
ccp2->input = CCP2_INPUT_NONE;
} break;
case CCP2_PAD_SOURCE | 2 << 16:
/* write to video port/ccdc */
if (flags & MEDIA_LNK_FL_ENABLED)
ccp2->output = CCP2_OUTPUT_CCDC;
else
ccp2->output = CCP2_OUTPUT_NONE;
break;
default:
return -EINVAL;
}
return 0;
}
/* media operations */
static const struct media_entity_operations ccp2_media_ops = {
.link_setup = ccp2_link_setup,
.link_validate = v4l2_subdev_link_validate,
};
/*
* omap3isp_ccp2_unregister_entities - Unregister media entities: subdev
* @ccp2: Pointer to ISP CCP2 device
*/
void omap3isp_ccp2_unregister_entities(struct isp_ccp2_device *ccp2)
{
v4l2_device_unregister_subdev(&ccp2->subdev);
omap3isp_video_unregister(&ccp2->video_in);
}
/*
* omap3isp_ccp2_register_entities - Register the subdev media entity
* @ccp2: Pointer to ISP CCP2 device
* @vdev: Pointer to v4l device
* return negative error code or zero on success
*/
int omap3isp_ccp2_register_entities(struct isp_ccp2_device *ccp2,
struct v4l2_device *vdev)
{
int ret;
/* Register the subdev and video nodes. */
ccp2->subdev.dev = vdev->mdev->dev;
ret = v4l2_device_register_subdev(vdev, &ccp2->subdev);
if (ret < 0)
goto error;
ret = omap3isp_video_register(&ccp2->video_in, vdev);
if (ret < 0)
goto error;
return 0;
error:
omap3isp_ccp2_unregister_entities(ccp2);
return ret;
}
/* -----------------------------------------------------------------------------
* ISP ccp2 initialisation and cleanup
*/
/*
* ccp2_init_entities - Initialize ccp2 subdev and media entity.
* @ccp2: Pointer to ISP CCP2 device
* return negative error code or zero on success
*/
static int ccp2_init_entities(struct isp_ccp2_device *ccp2)
{
struct v4l2_subdev *sd = &ccp2->subdev;
struct media_pad *pads = ccp2->pads;
struct media_entity *me = &sd->entity;
int ret;
ccp2->input = CCP2_INPUT_NONE;
ccp2->output = CCP2_OUTPUT_NONE;
v4l2_subdev_init(sd, &ccp2_sd_ops);
sd->internal_ops = &ccp2_sd_internal_ops;
strscpy(sd->name, "OMAP3 ISP CCP2", sizeof(sd->name));
sd->grp_id = 1 << 16; /* group ID for isp subdevs */
v4l2_set_subdevdata(sd, ccp2);
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
pads[CCP2_PAD_SINK].flags = MEDIA_PAD_FL_SINK
| MEDIA_PAD_FL_MUST_CONNECT;
pads[CCP2_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
me->ops = &ccp2_media_ops;
ret = media_entity_pads_init(me, CCP2_PADS_NUM, pads);
if (ret < 0)
return ret;
ccp2_init_formats(sd, NULL);
/*
* The CCP2 has weird line alignment requirements, possibly caused by
* DPCM8 decompression. Line length for data read from memory must be a
* multiple of 128 bits (16 bytes) in continuous mode (when no padding
* is present at end of lines). Additionally, if padding is used, the
* padded line length must be a multiple of 32 bytes. To simplify the
* implementation we use a fixed 32 bytes alignment regardless of the
* input format and width. If strict 128 bits alignment support is
* required ispvideo will need to be made aware of this special dual
* alignment requirements.
*/
ccp2->video_in.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
ccp2->video_in.bpl_alignment = 32;
ccp2->video_in.bpl_max = 0xffffffe0;
ccp2->video_in.isp = to_isp_device(ccp2);
ccp2->video_in.ops = &ccp2_video_ops;
ccp2->video_in.capture_mem = PAGE_ALIGN(4096 * 4096) * 3;
ret = omap3isp_video_init(&ccp2->video_in, "CCP2");
if (ret < 0)
goto error;
return 0;
error:
media_entity_cleanup(&ccp2->subdev.entity);
return ret;
}
/*
* omap3isp_ccp2_init - CCP2 initialization.
* @isp : Pointer to ISP device
* return negative error code or zero on success
*/
int omap3isp_ccp2_init(struct isp_device *isp)
{
struct isp_ccp2_device *ccp2 = &isp->isp_ccp2;
int ret;
init_waitqueue_head(&ccp2->wait);
/*
* On the OMAP34xx the CSI1 receiver is operated in the CSIb IO
* complex, which is powered by vdds_csib power rail. Hence the
* request for the regulator.
*
* On the OMAP36xx, the CCP2 uses the CSI PHY1 or PHY2, shared with
* the CSI2c or CSI2a receivers. The PHY then needs to be explicitly
* configured.
*
* TODO: Don't hardcode the usage of PHY1 (shared with CSI2c).
*/
if (isp->revision == ISP_REVISION_2_0) {
ccp2->vdds_csib = devm_regulator_get(isp->dev, "vdds_csib");
if (IS_ERR(ccp2->vdds_csib)) {
if (PTR_ERR(ccp2->vdds_csib) == -EPROBE_DEFER) {
dev_dbg(isp->dev,
"Can't get regulator vdds_csib, deferring probing\n");
return -EPROBE_DEFER;
}
dev_dbg(isp->dev,
"Could not get regulator vdds_csib\n");
ccp2->vdds_csib = NULL;
}
ccp2->phy = &isp->isp_csiphy2;
} else if (isp->revision == ISP_REVISION_15_0) {
ccp2->phy = &isp->isp_csiphy1;
}
ret = ccp2_init_entities(ccp2);
if (ret < 0)
return ret;
ccp2_reset(ccp2);
return 0;
}
/*
* omap3isp_ccp2_cleanup - CCP2 un-initialization
* @isp : Pointer to ISP device
*/
void omap3isp_ccp2_cleanup(struct isp_device *isp)
{
struct isp_ccp2_device *ccp2 = &isp->isp_ccp2;
omap3isp_video_cleanup(&ccp2->video_in);
media_entity_cleanup(&ccp2->subdev.entity);
}
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