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linux/drivers/media/platform/omap3isp/ispccp2.c
Sakari Ailus 6890874772 [media] omap3isp: Refactor device configuration structs for Device Tree 
Make omap3isp configuration data structures more suitable for consumption by
the DT by separating the I2C bus information of all the sub-devices in a
group and the ISP bus information from each other. The ISP bus information
is made a pointer instead of being directly embedded in the struct.

In the case of the DT only the sensor specific information on the ISP bus
configuration is retained. The structs are renamed to reflect that.

After this change the structs needed to describe device configuration can be
allocated and accessed separately without those needed only in the case of
platform data. The platform data related structs can be later removed once
the support for platform data can be removed.

Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi>
Acked-by: Igor Grinberg <grinberg@compulab.co.il> (for cm-t35)
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
2015-04-02 16:41:01 -03:00

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/*
* ispccp2.c
*
* TI OMAP3 ISP - CCP2 module
*
* Copyright (C) 2010 Nokia Corporation
* Copyright (C) 2010 Texas Instruments, Inc.
*
* Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
* Sakari Ailus <sakari.ailus@iki.fi>
*
* 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/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;
/* CCP2B mode */
val = isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_CTRL) |
ISPCCP2_CTRL_IO_OUT_SEL | 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_INV_SHIFT, ISPCCP2_CTRL_INV_MASK,
buscfg->strobe_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)
{
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_entity_remote_pad(&ccp2->pads[CCP2_PAD_SINK]);
sensor = media_entity_to_v4l2_subdev(pad->entity);
buscfg = sensor->host_priv;
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
* @cfg: V4L2 subdev pad configuration
* @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_pad_config *cfg,
unsigned int pad, enum v4l2_subdev_format_whence which)
{
if (which == V4L2_SUBDEV_FORMAT_TRY)
return v4l2_subdev_get_try_format(&ccp2->subdev, cfg, pad);
else
return &ccp2->formats[pad];
}
/*
* ccp2_try_format - Handle try format by pad subdev method
* @ccp2 : Pointer to ISP CCP2 device
* @cfg: V4L2 subdev pad configuration
* @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_pad_config *cfg, 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, cfg, 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
* @cfg: V4L2 subdev pad configuration
* @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_pad_config *cfg,
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, cfg, CCP2_PAD_SINK,
code->which);
code->code = format->code;
}
return 0;
}
static int ccp2_enum_frame_size(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
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, cfg, 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, cfg, 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
* @cfg: V4L2 subdev pad configuration
* @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_pad_config *cfg,
struct v4l2_subdev_format *fmt)
{
struct isp_ccp2_device *ccp2 = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt *format;
format = __ccp2_get_format(ccp2, cfg, 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
* @cfg: V4L2 subdev pad configuration
* @fmt : pointer to v4l2 subdev format structure
* returns zero
*/
static int ccp2_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *fmt)
{
struct isp_ccp2_device *ccp2 = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt *format;
format = __ccp2_get_format(ccp2, cfg, fmt->pad, fmt->which);
if (format == NULL)
return -EINVAL;
ccp2_try_format(ccp2, cfg, 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, cfg, CCP2_PAD_SOURCE,
fmt->which);
*format = fmt->format;
ccp2_try_format(ccp2, cfg, 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->pad : 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);
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);
switch (local->index | media_entity_type(remote->entity)) {
case CCP2_PAD_SINK | MEDIA_ENT_T_DEVNODE:
/* 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 | MEDIA_ENT_T_V4L2_SUBDEV:
/* 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 | MEDIA_ENT_T_V4L2_SUBDEV:
/* 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. */
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;
strlcpy(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_init(me, CCP2_PADS_NUM, pads, 0);
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_video;
/* Connect the video node to the ccp2 subdev. */
ret = media_entity_create_link(&ccp2->video_in.video.entity, 0,
&ccp2->subdev.entity, CCP2_PAD_SINK, 0);
if (ret < 0)
goto error_link;
return 0;
error_link:
omap3isp_video_cleanup(&ccp2->video_in);
error_video:
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)) {
dev_dbg(isp->dev,
"Could not get regulator vdds_csib\n");
ccp2->vdds_csib = NULL;
}
} 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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