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nest-open-source / nest-learning-thermostat / 5.6.1 / linux / refs/heads/master / . / drivers / media / video / isp / isp.c
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/*
* isp.c
*
* TI OMAP3 ISP - Core
*
* Copyright (C) 2006-2010 Nokia Corporation
* Copyright (C) 2007-2009 Texas Instruments, Inc.
*
* Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
* Sakari Ailus <sakari.ailus@maxwell.research.nokia.com>
*
* Contributors:
* Laurent Pinchart <laurent.pinchart@ideasonboard.com>
* Sakari Ailus <sakari.ailus@nokia.com>
* David Cohen <david.cohen@nokia.com>
* Stanimir Varbanov <svarbanov@mm-sol.com>
* Vimarsh Zutshi <vimarsh.zutshi@nokia.com>
* Tuukka Toivonen <tuukka.o.toivonen@nokia.com>
* Sergio Aguirre <saaguirre@ti.com>
* Antti Koskipaa <antti.koskipaa@nokia.com>
* Ivan T. Ivanov <iivanov@mm-sol.com>
* RaniSuneela <r-m@ti.com>
* Atanas Filipov <afilipov@mm-sol.com>
* Gjorgji Rosikopulos <grosikopulos@mm-sol.com>
* Hiroshi DOYU <hiroshi.doyu@nokia.com>
* Nayden Kanchev <nkanchev@mm-sol.com>
* Phil Carmody <ext-phil.2.carmody@nokia.com>
* Artem Bityutskiy <artem.bityutskiy@nokia.com>
* Dominic Curran <dcurran@ti.com>
* Ilkka Myllyperkio <ilkka.myllyperkio@sofica.fi>
* Pallavi Kulkarni <p-kulkarni@ti.com>
* Vaibhav Hiremath <hvaibhav@ti.com>
* Mohit Jalori <mjalori@ti.com>
* Sameer Venkatraman <sameerv@ti.com>
* Senthilvadivu Guruswamy <svadivu@ti.com>
* Thara Gopinath <thara@ti.com>
* Toni Leinonen <toni.leinonen@nokia.com>
* Troy Laramy <t-laramy@ti.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.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#include <asm/cacheflush.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/vmalloc.h>
#include <media/v4l2-common.h>
#include <media/v4l2-device.h>
#include "isp.h"
#include "ispreg.h"
#include "ispccdc.h"
#include "isppreview.h"
#include "ispresizer.h"
#include "ispcsi2.h"
#include "ispccp2.h"
#include "isph3a.h"
#include "isphist.h"
static void isp_save_ctx(struct isp_device *isp);
static void isp_restore_ctx(struct isp_device *isp);
static const struct isp_res_mapping isp_res_maps[] = {
{
.isp_rev = ISP_REVISION_2_0,
.map = 1 << OMAP3_ISP_IOMEM_MAIN |
1 << OMAP3_ISP_IOMEM_CCP2 |
1 << OMAP3_ISP_IOMEM_CCDC |
1 << OMAP3_ISP_IOMEM_HIST |
1 << OMAP3_ISP_IOMEM_H3A |
1 << OMAP3_ISP_IOMEM_PREV |
1 << OMAP3_ISP_IOMEM_RESZ |
1 << OMAP3_ISP_IOMEM_SBL |
1 << OMAP3_ISP_IOMEM_CSI2A_REGS1 |
1 << OMAP3_ISP_IOMEM_CSIPHY2,
},
{
.isp_rev = ISP_REVISION_15_0,
.map = 1 << OMAP3_ISP_IOMEM_MAIN |
1 << OMAP3_ISP_IOMEM_CCP2 |
1 << OMAP3_ISP_IOMEM_CCDC |
1 << OMAP3_ISP_IOMEM_HIST |
1 << OMAP3_ISP_IOMEM_H3A |
1 << OMAP3_ISP_IOMEM_PREV |
1 << OMAP3_ISP_IOMEM_RESZ |
1 << OMAP3_ISP_IOMEM_SBL |
1 << OMAP3_ISP_IOMEM_CSI2A_REGS1 |
1 << OMAP3_ISP_IOMEM_CSIPHY2 |
1 << OMAP3_ISP_IOMEM_CSI2A_REGS2 |
1 << OMAP3_ISP_IOMEM_CSI2C_REGS1 |
1 << OMAP3_ISP_IOMEM_CSIPHY1 |
1 << OMAP3_ISP_IOMEM_CSI2C_REGS2,
},
};
/* Structure for saving/restoring ISP module registers */
static struct isp_reg isp_reg_list[] = {
{OMAP3_ISP_IOMEM_MAIN, ISP_SYSCONFIG, 0},
{OMAP3_ISP_IOMEM_MAIN, ISP_CTRL, 0},
{OMAP3_ISP_IOMEM_MAIN, ISP_TCTRL_CTRL, 0},
{0, ISP_TOK_TERM, 0}
};
/*
* isp_flush - Post pending L3 bus writes by doing a register readback
* @isp: OMAP3 ISP device
*
* In order to force posting of pending writes, we need to write and
* readback the same register, in this case the revision register.
*
* See this link for reference:
* http://www.mail-archive.com/linux-omap@vger.kernel.org/msg08149.html
*/
void isp_flush(struct isp_device *isp)
{
isp_reg_writel(isp, 0, OMAP3_ISP_IOMEM_MAIN, ISP_REVISION);
isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_REVISION);
}
/*
* isp_enable_interrupts - Enable ISP interrupts.
* @isp: OMAP3 ISP device
*/
static void isp_enable_interrupts(struct isp_device *isp)
{
static const u32 irq = IRQ0ENABLE_CSIA_IRQ
| IRQ0ENABLE_CSIB_IRQ
| IRQ0ENABLE_CCDC_LSC_PREF_ERR_IRQ
| IRQ0ENABLE_CCDC_LSC_DONE_IRQ
| IRQ0ENABLE_CCDC_VD0_IRQ
| IRQ0ENABLE_CCDC_VD1_IRQ
| IRQ0ENABLE_HS_VS_IRQ
| IRQ0ENABLE_HIST_DONE_IRQ
| IRQ0ENABLE_H3A_AWB_DONE_IRQ
| IRQ0ENABLE_H3A_AF_DONE_IRQ
| IRQ0ENABLE_PRV_DONE_IRQ
| IRQ0ENABLE_RSZ_DONE_IRQ;
isp_reg_writel(isp, irq, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0STATUS);
isp_reg_writel(isp, irq, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0ENABLE);
}
/*
* isp_disable_interrupts - Disable ISP interrupts.
* @isp: OMAP3 ISP device
*/
static void isp_disable_interrupts(struct isp_device *isp)
{
isp_reg_writel(isp, 0, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0ENABLE);
}
/**
* isp_set_xclk - Configures the specified cam_xclk to the desired frequency.
* @isp: OMAP3 ISP device
* @xclk: Desired frequency of the clock in Hz. 0 = stable low, 1 is stable high
* @xclksel: XCLK to configure (0 = A, 1 = B).
*
* Configures the specified MCLK divisor in the ISP timing control register
* (TCTRL_CTRL) to generate the desired xclk clock value.
*
* Divisor = cam_mclk_hz / xclk
*
* Returns the final frequency that is actually being generated
**/
static u32 isp_set_xclk(struct isp_device *isp, u32 xclk, u8 xclksel)
{
u32 divisor;
u32 currentxclk;
unsigned long mclk_hz;
if (!isp_get(isp))
return 0;
mclk_hz = clk_get_rate(isp->clock[ISP_CLK_CAM_MCLK]);
if (xclk >= mclk_hz) {
divisor = ISPTCTRL_CTRL_DIV_BYPASS;
currentxclk = mclk_hz;
} else if (xclk >= 2) {
divisor = mclk_hz / xclk;
if (divisor >= ISPTCTRL_CTRL_DIV_BYPASS)
divisor = ISPTCTRL_CTRL_DIV_BYPASS - 1;
currentxclk = mclk_hz / divisor;
} else {
divisor = xclk;
currentxclk = 0;
}
switch (xclksel) {
case 0:
isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_MAIN, ISP_TCTRL_CTRL,
ISPTCTRL_CTRL_DIVA_MASK,
divisor << ISPTCTRL_CTRL_DIVA_SHIFT);
dev_dbg(isp->dev, "isp_set_xclk(): cam_xclka set to %d Hz\n",
currentxclk);
break;
case 1:
isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_MAIN, ISP_TCTRL_CTRL,
ISPTCTRL_CTRL_DIVB_MASK,
divisor << ISPTCTRL_CTRL_DIVB_SHIFT);
dev_dbg(isp->dev, "isp_set_xclk(): cam_xclkb set to %d Hz\n",
currentxclk);
break;
default:
isp_put(isp);
dev_dbg(isp->dev, "ISP_ERR: isp_set_xclk(): Invalid requested "
"xclk. Must be 0 (A) or 1 (B).\n");
return -EINVAL;
}
/* Do we go from stable whatever to clock? */
if (divisor >= 2 && isp->xclk_divisor[xclksel] < 2)
isp_get(isp);
/* Stopping the clock. */
else if (divisor < 2 && isp->xclk_divisor[xclksel] >= 2)
isp_put(isp);
isp->xclk_divisor[xclksel] = divisor;
isp_put(isp);
return currentxclk;
}
/*
* isp_power_settings - Sysconfig settings, for Power Management.
* @isp: OMAP3 ISP device
* @idle: Consider idle state.
*
* Sets the power settings for the ISP, and SBL bus.
*/
static void isp_power_settings(struct isp_device *isp, int idle)
{
isp_reg_writel(isp,
((idle ? ISP_SYSCONFIG_MIDLEMODE_SMARTSTANDBY :
ISP_SYSCONFIG_MIDLEMODE_FORCESTANDBY) <<
ISP_SYSCONFIG_MIDLEMODE_SHIFT),
OMAP3_ISP_IOMEM_MAIN, ISP_SYSCONFIG);
isp_reg_writel(isp, ISPCTRL_SBL_AUTOIDLE, OMAP3_ISP_IOMEM_MAIN,
ISP_CTRL);
}
/*
* Configure the bridge and lane shifter. Valid inputs are
*
* CCDC_INPUT_PARALLEL: Parallel interface
* CCDC_INPUT_CSI2A: CSI2a receiver
* CCDC_INPUT_CCP2B: CCP2b receiver
* CCDC_INPUT_CSI2C: CSI2c receiver
*
* The bridge and lane shifter are configured according to the selected input
* and the ISP platform data.
*/
void isp_configure_bridge(struct isp_device *isp, enum ccdc_input_entity input,
const struct isp_parallel_platform_data *pdata)
{
u32 ispctrl_val;
ispctrl_val = isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL);
ispctrl_val &= ~ISPCTRL_SHIFT_MASK;
ispctrl_val &= ~ISPCTRL_PAR_CLK_POL_INV;
ispctrl_val &= ~ISPCTRL_PAR_SER_CLK_SEL_MASK;
ispctrl_val &= ~ISPCTRL_PAR_BRIDGE_MASK;
switch (input) {
case CCDC_INPUT_PARALLEL:
ispctrl_val |= ISPCTRL_PAR_SER_CLK_SEL_PARALLEL;
ispctrl_val |= pdata->data_lane_shift << ISPCTRL_SHIFT_SHIFT;
ispctrl_val |= pdata->clk_pol << ISPCTRL_PAR_CLK_POL_SHIFT;
ispctrl_val |= pdata->bridge << ISPCTRL_PAR_BRIDGE_SHIFT;
break;
case CCDC_INPUT_CSI2A:
ispctrl_val |= ISPCTRL_PAR_SER_CLK_SEL_CSIA;
break;
case CCDC_INPUT_CCP2B:
ispctrl_val |= ISPCTRL_PAR_SER_CLK_SEL_CSIB;
break;
case CCDC_INPUT_CSI2C:
ispctrl_val |= ISPCTRL_PAR_SER_CLK_SEL_CSIC;
break;
default:
return;
}
ispctrl_val &= ~ISPCTRL_SYNC_DETECT_MASK;
ispctrl_val |= ISPCTRL_SYNC_DETECT_VSRISE;
isp_reg_writel(isp, ispctrl_val, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL);
}
/**
* isp_set_pixel_clock - Configures the ISP pixel clock
* @isp: OMAP3 ISP device
* @pixelclk: Average pixel clock in Hz
*
* Set the average pixel clock required by the sensor. The ISP will use the
* lowest possible memory bandwidth settings compatible with the clock.
**/
static void isp_set_pixel_clock(struct isp_device *isp, unsigned int pixelclk)
{
isp->isp_ccdc.vpcfg.pixelclk = pixelclk;
}
void isphist_dma_done(struct isp_device *isp)
{
if (ispccdc_busy(&isp->isp_ccdc) || ispstat_pcr_busy(&isp->isp_hist)) {
/* Histogram cannot be enabled in this frame anymore */
atomic_set(&isp->isp_hist.buf_err, 1);
dev_dbg(isp->dev, "hist: Out of synchronization with "
"CCDC. Ignoring next buffer.\n");
}
}
static inline void isp_isr_dbg(struct isp_device *isp, u32 irqstatus)
{
static const char *name[] = {
"CSIA_IRQ",
"res1",
"res2",
"CSIB_LCM_IRQ",
"CSIB_IRQ",
"res5",
"res6",
"res7",
"CCDC_VD0_IRQ",
"CCDC_VD1_IRQ",
"CCDC_VD2_IRQ",
"CCDC_ERR_IRQ",
"H3A_AF_DONE_IRQ",
"H3A_AWB_DONE_IRQ",
"res14",
"res15",
"HIST_DONE_IRQ",
"CCDC_LSC_DONE",
"CCDC_LSC_PREFETCH_COMPLETED",
"CCDC_LSC_PREFETCH_ERROR",
"PRV_DONE_IRQ",
"CBUFF_IRQ",
"res22",
"res23",
"RSZ_DONE_IRQ",
"OVF_IRQ",
"res26",
"res27",
"MMU_ERR_IRQ",
"OCP_ERR_IRQ",
"SEC_ERR_IRQ",
"HS_VS_IRQ",
};
int i;
dev_dbg(isp->dev, "\n");
for (i = 0; i < ARRAY_SIZE(name); i++) {
if ((1 << i) & irqstatus)
printk(KERN_CONT "%s ", name[i]);
}
printk(KERN_CONT "\n");
}
static void isp_isr_sbl(struct isp_device *isp)
{
struct device *dev = isp->dev;
u32 sbl_pcr;
/*
* Handle shared buffer logic overflows for video buffers.
* ISPSBL_PCR_CCDCPRV_2_RSZ_OVF can be safely ignored.
*/
sbl_pcr = isp_reg_readl(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_PCR);
isp_reg_writel(isp, sbl_pcr, OMAP3_ISP_IOMEM_SBL, ISPSBL_PCR);
sbl_pcr &= ~ISPSBL_PCR_CCDCPRV_2_RSZ_OVF;
if (sbl_pcr)
dev_dbg(dev, "SBL overflow (PCR = 0x%08x)\n", sbl_pcr);
if (sbl_pcr & (ISPSBL_PCR_CCDC_WBL_OVF | ISPSBL_PCR_CSIA_WBL_OVF
| ISPSBL_PCR_CSIB_WBL_OVF)) {
isp->isp_ccdc.error = 1;
if (isp->isp_ccdc.output & CCDC_OUTPUT_PREVIEW)
isp->isp_prev.error = 1;
if (isp->isp_ccdc.output & CCDC_OUTPUT_RESIZER)
isp->isp_res.error = 1;
}
if (sbl_pcr & ISPSBL_PCR_PRV_WBL_OVF) {
isp->isp_prev.error = 1;
if (isp->isp_res.input == RESIZER_INPUT_VP &&
!(isp->isp_ccdc.output & CCDC_OUTPUT_RESIZER))
isp->isp_res.error = 1;
}
if (sbl_pcr & (ISPSBL_PCR_RSZ1_WBL_OVF
| ISPSBL_PCR_RSZ2_WBL_OVF
| ISPSBL_PCR_RSZ3_WBL_OVF
| ISPSBL_PCR_RSZ4_WBL_OVF))
isp->isp_res.error = 1;
if (sbl_pcr & ISPSBL_PCR_H3A_AF_WBL_OVF)
ispstat_sbl_overflow(&isp->isp_af);
if (sbl_pcr & ISPSBL_PCR_H3A_AEAWB_WBL_OVF)
ispstat_sbl_overflow(&isp->isp_aewb);
}
/*
* isp_isr - Interrupt Service Routine for Camera ISP module.
* @irq: Not used currently.
* @_isp: Pointer to the OMAP3 ISP device
*
* Handles the corresponding callback if plugged in.
*
* Returns IRQ_HANDLED when IRQ was correctly handled, or IRQ_NONE when the
* IRQ wasn't handled.
*/
static irqreturn_t isp_isr(int irq, void *_isp)
{
static const u32 ccdc_events = IRQ0STATUS_CCDC_LSC_PREF_ERR_IRQ |
IRQ0STATUS_CCDC_LSC_DONE_IRQ |
IRQ0STATUS_CCDC_VD0_IRQ |
IRQ0STATUS_CCDC_VD1_IRQ |
IRQ0STATUS_HS_VS_IRQ;
struct isp_device *isp = _isp;
u32 irqstatus;
int ret;
irqstatus = isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0STATUS);
isp_reg_writel(isp, irqstatus, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0STATUS);
isp_isr_sbl(isp);
if (irqstatus & IRQ0STATUS_CSIA_IRQ) {
ret = isp_csi2_isr(&isp->isp_csi2a);
if (ret)
isp->isp_ccdc.error = 1;
}
if (irqstatus & IRQ0STATUS_CSIB_IRQ) {
ret = ispccp2_isr(&isp->isp_ccp2);
if (ret)
isp->isp_ccdc.error = 1;
}
if (irqstatus & IRQ0STATUS_CCDC_VD0_IRQ) {
if (isp->isp_ccdc.output & CCDC_OUTPUT_PREVIEW)
isppreview_isr_frame_sync(&isp->isp_prev);
if (isp->isp_ccdc.output & CCDC_OUTPUT_RESIZER)
ispresizer_isr_frame_sync(&isp->isp_res);
ispstat_isr_frame_sync(&isp->isp_aewb);
ispstat_isr_frame_sync(&isp->isp_af);
ispstat_isr_frame_sync(&isp->isp_hist);
}
if (irqstatus & ccdc_events)
ispccdc_isr(&isp->isp_ccdc, irqstatus & ccdc_events);
if (irqstatus & IRQ0STATUS_PRV_DONE_IRQ) {
if (isp->isp_prev.output & PREVIEW_OUTPUT_RESIZER)
ispresizer_isr_frame_sync(&isp->isp_res);
isppreview_isr(&isp->isp_prev);
}
if (irqstatus & IRQ0STATUS_RSZ_DONE_IRQ)
ispresizer_isr(&isp->isp_res);
if (irqstatus & IRQ0STATUS_H3A_AWB_DONE_IRQ)
ispstat_isr(&isp->isp_aewb);
if (irqstatus & IRQ0STATUS_H3A_AF_DONE_IRQ)
ispstat_isr(&isp->isp_af);
if (irqstatus & IRQ0STATUS_HIST_DONE_IRQ)
ispstat_isr(&isp->isp_hist);
isp_flush(isp);
#if defined(DEBUG) && defined(ISP_ISR_DEBUG)
isp_isr_dbg(isp, irqstatus);
#endif
return IRQ_HANDLED;
}
/* -----------------------------------------------------------------------------
* Pipeline power management
*
* Entities must be powered up when part of a pipeline that contains at least
* one open video device node.
*
* To achieve this use the entity use_count field to track the number of users.
* For entities corresponding to video device nodes the use_count field stores
* the users count of the node. For entities corresponding to subdevs the
* use_count field stores the total number of users of all video device nodes
* in the pipeline.
*
* The omap3isp_pipeline_pm_use() function must be called in the open() and
* close() handlers of video device nodes. It increments or decrements the use
* count of all subdev entities in the pipeline.
*
* To react to link management on powered pipelines, the link setup notification
* callback updates the use count of all entities in the source and sink sides
* of the link.
*/
/*
* isp_pipeline_pm_use_count - Count the number of users of a pipeline
* @entity: The entity
*
* Return the total number of users of all video device nodes in the pipeline.
*/
static int isp_pipeline_pm_use_count(struct media_entity *entity)
{
struct media_entity_graph graph;
int use = 0;
media_entity_graph_walk_start(&graph, entity);
while ((entity = media_entity_graph_walk_next(&graph))) {
if (media_entity_type(entity) == MEDIA_ENTITY_TYPE_DEVNODE)
use += entity->use_count;
}
return use;
}
/*
* isp_pipeline_pm_power_one - Apply power change to an entity
* @entity: The entity
* @change: Use count change
*
* Change the entity use count by @change. If the entity is a subdev update its
* power state by calling the core::s_power operation when the use count goes
* from 0 to != 0 or from != 0 to 0.
*
* Return 0 on success or a negative error code on failure.
*/
static int isp_pipeline_pm_power_one(struct media_entity *entity, int change)
{
struct v4l2_subdev *subdev;
int ret;
subdev = media_entity_type(entity) == MEDIA_ENTITY_TYPE_V4L2_SUBDEV
? media_entity_to_v4l2_subdev(entity) : NULL;
if (entity->use_count == 0 && change > 0 && subdev != NULL) {
ret = v4l2_subdev_call(subdev, core, s_power, 1);
if (ret < 0 && ret != -ENOIOCTLCMD)
return ret;
}
entity->use_count += change;
WARN_ON(entity->use_count < 0);
if (entity->use_count == 0 && change < 0 && subdev != NULL)
v4l2_subdev_call(subdev, core, s_power, 0);
return 0;
}
/*
* isp_pipeline_pm_power - Apply power change to all entities in a pipeline
* @entity: The entity
* @change: Use count change
*
* Walk the pipeline to update the use count and the power state of all non-node
* entities.
*
* Return 0 on success or a negative error code on failure.
*/
static int isp_pipeline_pm_power(struct media_entity *entity, int change)
{
struct media_entity_graph graph;
struct media_entity *first = entity;
int ret = 0;
if (!change)
return 0;
media_entity_graph_walk_start(&graph, entity);
while (!ret && (entity = media_entity_graph_walk_next(&graph)))
if (media_entity_type(entity) != MEDIA_ENTITY_TYPE_DEVNODE)
ret = isp_pipeline_pm_power_one(entity, change);
if (!ret)
return 0;
media_entity_graph_walk_start(&graph, first);
while ((first = media_entity_graph_walk_next(&graph))
&& first != entity)
if (media_entity_type(first) != MEDIA_ENTITY_TYPE_DEVNODE)
isp_pipeline_pm_power_one(first, -change);
return ret;
}
/*
* omap3isp_pipeline_pm_use - Update the use count of an entity
* @entity: The entity
* @use: Use (1) or stop using (0) the entity
*
* Update the use count of all entities in the pipeline and power entities on or
* off accordingly.
*
* Return 0 on success or a negative error code on failure. Powering entities
* off is assumed to never fail. No failure can occur when the use parameter is
* set to 0.
*/
int omap3isp_pipeline_pm_use(struct media_entity *entity, int use)
{
int change = use ? 1 : -1;
int ret;
mutex_lock(&entity->parent->graph_mutex);
/* Apply use count to node. */
entity->use_count += change;
WARN_ON(entity->use_count < 0);
/* Apply power change to connected non-nodes. */
ret = isp_pipeline_pm_power(entity, change);
mutex_unlock(&entity->parent->graph_mutex);
return ret;
}
/*
* isp_pipeline_link_notify - Link management notification callback
* @source: Pad at the start of the link
* @sink: Pad at the end of the link
* @flags: New link flags that will be applied
*
* React to link management on powered pipelines by updating the use count of
* all entities in the source and sink sides of the link. Entities are powered
* on or off accordingly.
*
* Return 0 on success or a negative error code on failure. Powering entities
* off is assumed to never fail. This function will not fail for disconnection
* events.
*/
static int isp_pipeline_link_notify(struct media_pad *source,
struct media_pad *sink, u32 flags)
{
int source_use = isp_pipeline_pm_use_count(source->entity);
int sink_use = isp_pipeline_pm_use_count(sink->entity);
int ret;
if (!(flags & MEDIA_LINK_FLAG_ENABLED)) {
/* Powering off entities is assumed to never fail. */
isp_pipeline_pm_power(source->entity, -sink_use);
isp_pipeline_pm_power(sink->entity, -source_use);
return 0;
}
ret = isp_pipeline_pm_power(source->entity, sink_use);
if (ret < 0)
return ret;
ret = isp_pipeline_pm_power(sink->entity, source_use);
if (ret < 0)
isp_pipeline_pm_power(source->entity, -sink_use);
return ret;
}
/* -----------------------------------------------------------------------------
* Pipeline stream management
*/
/*
* isp_pipeline_enable - Enable streaming on a pipeline
* @pipe: ISP pipeline
* @mode: Stream mode (single shot or continuous)
*
* Walk the entities chain starting at the pipeline output video node and start
* all modules in the chain in the given mode.
*
* Return 0 if successfull, or the return value of the failed video::s_stream
* operation otherwise.
*/
static int isp_pipeline_enable(struct isp_pipeline *pipe,
enum isp_pipeline_stream_state mode)
{
struct isp_device *isp = pipe->output->isp;
struct media_entity *entity;
struct media_pad *pad;
struct v4l2_subdev *subdev;
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&pipe->lock, flags);
pipe->state &= ~(ISP_PIPELINE_IDLE_INPUT | ISP_PIPELINE_IDLE_OUTPUT);
spin_unlock_irqrestore(&pipe->lock, flags);
pipe->do_propagation = false;
entity = &pipe->output->video.entity;
while (1) {
pad = &entity->pads[0];
if (!(pad->flags & MEDIA_PAD_FLAG_INPUT))
break;
pad = media_entity_remote_source(pad);
if (pad == NULL ||
media_entity_type(pad->entity) !=
MEDIA_ENTITY_TYPE_V4L2_SUBDEV)
break;
entity = pad->entity;
subdev = media_entity_to_v4l2_subdev(entity);
ret = v4l2_subdev_call(subdev, video, s_stream, mode);
if (ret < 0 && ret != -ENOIOCTLCMD)
break;
if (subdev == &isp->isp_ccdc.subdev) {
v4l2_subdev_call(&isp->isp_aewb.subdev, video,
s_stream, mode);
v4l2_subdev_call(&isp->isp_af.subdev, video,
s_stream, mode);
v4l2_subdev_call(&isp->isp_hist.subdev, video,
s_stream, mode);
pipe->do_propagation = true;
}
}
/* Frame number propagation. In continuous streaming mode the number
* is incremented in the frame start ISR. In mem-to-mem mode
* singleshot is used and frame start IRQs are not available.
* Thus we have to increment the number here.
*/
if (pipe->do_propagation && mode == ISP_PIPELINE_STREAM_SINGLESHOT)
atomic_inc(&pipe->frame_number);
return ret;
}
static int isp_pipeline_wait_resizer(struct isp_device *isp)
{
return ispresizer_busy(&isp->isp_res);
}
static int isp_pipeline_wait_preview(struct isp_device *isp)
{
return isppreview_busy(&isp->isp_prev);
}
static int isp_pipeline_wait_ccdc(struct isp_device *isp)
{
return ispstat_busy(&isp->isp_af)
|| ispstat_busy(&isp->isp_aewb)
|| ispstat_busy(&isp->isp_hist)
|| ispccdc_busy(&isp->isp_ccdc);
}
#define ISP_STOP_TIMEOUT msecs_to_jiffies(1000)
static int isp_pipeline_wait(struct isp_device *isp,
int(*busy)(struct isp_device *isp))
{
unsigned long timeout = jiffies + ISP_STOP_TIMEOUT;
while (!time_after(jiffies, timeout)) {
if (!busy(isp))
return 0;
}
return 1;
}
/*
* isp_pipeline_disable - Disable streaming on a pipeline
* @pipe: ISP pipeline
*
* Walk the entities chain starting at the pipeline output video node and stop
* all modules in the chain. Wait synchronously for the modules to be stopped if
* necessary.
*
* Return 0 if all modules have been properly stopped, or -ETIMEDOUT if a module
* can't be stopped (in which case a software reset of the ISP is probably
* necessary).
*/
static int isp_pipeline_disable(struct isp_pipeline *pipe)
{
struct isp_device *isp = pipe->output->isp;
struct media_entity *entity;
struct media_pad *pad;
struct v4l2_subdev *subdev;
int failure = 0;
int ret;
/*
* We need to stop all the modules after CCDC first or they'll
* never stop since they may not get a full frame from CCDC.
*/
entity = &pipe->output->video.entity;
while (1) {
pad = &entity->pads[0];
if (!(pad->flags & MEDIA_PAD_FLAG_INPUT))
break;
pad = media_entity_remote_source(pad);
if (pad == NULL ||
media_entity_type(pad->entity) !=
MEDIA_ENTITY_TYPE_V4L2_SUBDEV)
break;
entity = pad->entity;
subdev = media_entity_to_v4l2_subdev(entity);
if (subdev == &isp->isp_ccdc.subdev) {
v4l2_subdev_call(&isp->isp_aewb.subdev,
video, s_stream, 0);
v4l2_subdev_call(&isp->isp_af.subdev,
video, s_stream, 0);
v4l2_subdev_call(&isp->isp_hist.subdev,
video, s_stream, 0);
}
v4l2_subdev_call(subdev, video, s_stream, 0);
if (subdev == &isp->isp_res.subdev) {
ret = isp_pipeline_wait(isp, isp_pipeline_wait_resizer);
} else if (subdev == &isp->isp_prev.subdev) {
ret = isp_pipeline_wait(isp, isp_pipeline_wait_preview);
} else if (subdev == &isp->isp_ccdc.subdev) {
ret = isp_pipeline_wait(isp, isp_pipeline_wait_ccdc);
} else {
ret = 0;
}
if (ret) {
dev_info(isp->dev, "Unable to stop %s\n", subdev->name);
failure = -ETIMEDOUT;
}
}
return failure;
}
/*
* isp_pipeline_set_stream - Enable/disable streaming on a pipeline
* @pipe: ISP pipeline
* @state: Stream state (stopped, single shot or continuous)
*
* Set the pipeline to the given stream state. Pipelines can be started in
* single-shot or continuous mode.
*
* Return 0 if successfull, or the return value of the failed video::s_stream
* operation otherwise.
*/
int isp_pipeline_set_stream(struct isp_pipeline *pipe,
enum isp_pipeline_stream_state state)
{
int ret;
if (state == ISP_PIPELINE_STREAM_STOPPED)
ret = isp_pipeline_disable(pipe);
else
ret = isp_pipeline_enable(pipe, state);
pipe->stream_state = state;
return ret;
}
/*
* isp_pipeline_resume - Resume streaming on a pipeline
* @pipe: ISP pipeline
*
* Resume video output and input and re-enable pipeline.
*/
static void isp_pipeline_resume(struct isp_pipeline *pipe)
{
int singleshot = pipe->stream_state == ISP_PIPELINE_STREAM_SINGLESHOT;
isp_video_resume(pipe->output, !singleshot);
if (singleshot)
isp_video_resume(pipe->input, 0);
isp_pipeline_enable(pipe, pipe->stream_state);
}
/*
* isp_pipeline_suspend - Suspend streaming on a pipeline
* @pipe: ISP pipeline
*
* Suspend pipeline.
*/
static void isp_pipeline_suspend(struct isp_pipeline *pipe)
{
isp_pipeline_disable(pipe);
}
/*
* isp_pipeline_is_last - Verify if entity has an enbled link to the output
* video node
* @me: ISP module's media entity
*
* Returns 1 if the entity has an enabled link to the output video node or 0
* otherwise. It's true only while pipeline can have no more than one output
* node.
*/
static int isp_pipeline_is_last(struct media_entity *me)
{
struct isp_pipeline *pipe;
struct media_pad *pad;
if (!me->pipe)
return 0;
pipe = to_isp_pipeline(me);
if (pipe->stream_state == ISP_PIPELINE_STREAM_STOPPED)
return 0;
pad = media_entity_remote_source(&pipe->output->pad);
return pad->entity == me;
}
/*
* isp_suspend_module_pipeline - Suspend pipeline to which belongs the module
* @me: ISP module's media entity
*
* Suspend the whole pipeline if module's entity has an enabled link to the
* output video node. It works only while pipeline can have no more than one
* output node.
*/
static void isp_suspend_module_pipeline(struct media_entity *me)
{
if (isp_pipeline_is_last(me))
isp_pipeline_suspend(to_isp_pipeline(me));
}
/*
* isp_resume_module_pipeline - Resume pipeline to which belongs the module
* @me: ISP module's media entity
*
* Resume the whole pipeline if module's entity has an enabled link to the
* output video node. It works only while pipeline can have no more than one
* output node.
*/
static void isp_resume_module_pipeline(struct media_entity *me)
{
if (isp_pipeline_is_last(me))
isp_pipeline_resume(to_isp_pipeline(me));
}
/*
* isp_suspend_modules - Suspend ISP submodules.
* @isp: OMAP3 ISP device
*
* Returns 0 if suspend left in idle state all the submodules properly,
* or returns 1 if a general Reset is required to suspend the submodules.
*/
static int isp_suspend_modules(struct isp_device *isp)
{
unsigned long timeout;
ispstat_suspend(&isp->isp_aewb);
ispstat_suspend(&isp->isp_af);
ispstat_suspend(&isp->isp_hist);
isp_suspend_module_pipeline(&isp->isp_res.subdev.entity);
isp_suspend_module_pipeline(&isp->isp_prev.subdev.entity);
isp_suspend_module_pipeline(&isp->isp_ccdc.subdev.entity);
isp_suspend_module_pipeline(&isp->isp_csi2a.subdev.entity);
isp_suspend_module_pipeline(&isp->isp_ccp2.subdev.entity);
timeout = jiffies + ISP_STOP_TIMEOUT;
while (ispstat_busy(&isp->isp_af)
|| ispstat_busy(&isp->isp_aewb)
|| ispstat_busy(&isp->isp_hist)
|| isppreview_busy(&isp->isp_prev)
|| ispresizer_busy(&isp->isp_res)
|| ispccdc_busy(&isp->isp_ccdc)) {
if (time_after(jiffies, timeout)) {
dev_info(isp->dev, "can't stop modules.\n");
return 1;
}
msleep(1);
}
return 0;
}
/*
* isp_resume_modules - Resume ISP submodules.
* @isp: OMAP3 ISP device
*/
static void isp_resume_modules(struct isp_device *isp)
{
ispstat_resume(&isp->isp_aewb);
ispstat_resume(&isp->isp_af);
ispstat_resume(&isp->isp_hist);
isp_resume_module_pipeline(&isp->isp_res.subdev.entity);
isp_resume_module_pipeline(&isp->isp_prev.subdev.entity);
isp_resume_module_pipeline(&isp->isp_ccdc.subdev.entity);
isp_resume_module_pipeline(&isp->isp_csi2a.subdev.entity);
isp_resume_module_pipeline(&isp->isp_ccp2.subdev.entity);
}
/*
* isp_reset - Reset ISP with a timeout wait for idle.
* @isp: OMAP3 ISP device
*/
static int isp_reset(struct isp_device *isp)
{
unsigned long timeout = 0;
isp_reg_writel(isp,
isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_SYSCONFIG)
| ISP_SYSCONFIG_SOFTRESET,
OMAP3_ISP_IOMEM_MAIN, ISP_SYSCONFIG);
while (!(isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN,
ISP_SYSSTATUS) & 0x1)) {
if (timeout++ > 10000) {
dev_alert(isp->dev, "cannot reset ISP\n");
return -ETIMEDOUT;
}
udelay(1);
}
return 0;
}
/*
* isp_save_context - Saves the values of the ISP module registers.
* @isp: OMAP3 ISP device
* @reg_list: Structure containing pairs of register address and value to
* modify on OMAP.
*/
static void
isp_save_context(struct isp_device *isp, struct isp_reg *reg_list)
{
struct isp_reg *next = reg_list;
for (; next->reg != ISP_TOK_TERM; next++)
next->val = isp_reg_readl(isp, next->mmio_range, next->reg);
}
/*
* isp_restore_context - Restores the values of the ISP module registers.
* @isp: OMAP3 ISP device
* @reg_list: Structure containing pairs of register address and value to
* modify on OMAP.
*/
static void
isp_restore_context(struct isp_device *isp, struct isp_reg *reg_list)
{
struct isp_reg *next = reg_list;
for (; next->reg != ISP_TOK_TERM; next++)
isp_reg_writel(isp, next->val, next->mmio_range, next->reg);
}
/*
* isp_save_ctx - Saves ISP, CCDC, HIST, H3A, PREV, RESZ & MMU context.
* @isp: OMAP3 ISP device
*
* Routine for saving the context of each module in the ISP.
* CCDC, HIST, H3A, PREV, RESZ and MMU.
*/
static void isp_save_ctx(struct isp_device *isp)
{
isp_save_context(isp, isp_reg_list);
if (isp->iommu)
iommu_save_ctx(isp->iommu);
}
/*
* isp_restore_ctx - Restores ISP, CCDC, HIST, H3A, PREV, RESZ & MMU context.
* @isp: OMAP3 ISP device
*
* Routine for restoring the context of each module in the ISP.
* CCDC, HIST, H3A, PREV, RESZ and MMU.
*/
static void isp_restore_ctx(struct isp_device *isp)
{
isp_restore_context(isp, isp_reg_list);
if (isp->iommu)
iommu_restore_ctx(isp->iommu);
ispccdc_restore_context(isp);
isppreview_restore_context(isp);
}
/* -----------------------------------------------------------------------------
* SBL resources management
*/
#define OMAP3_ISP_SBL_READ (OMAP3_ISP_SBL_CSI1_READ | \
OMAP3_ISP_SBL_CCDC_LSC_READ | \
OMAP3_ISP_SBL_PREVIEW_READ | \
OMAP3_ISP_SBL_RESIZER_READ)
#define OMAP3_ISP_SBL_WRITE (OMAP3_ISP_SBL_CSI1_WRITE | \
OMAP3_ISP_SBL_CSI2A_WRITE | \
OMAP3_ISP_SBL_CSI2C_WRITE | \
OMAP3_ISP_SBL_CCDC_WRITE | \
OMAP3_ISP_SBL_PREVIEW_WRITE)
void isp_sbl_enable(struct isp_device *isp, enum isp_sbl_resource res)
{
u32 sbl = 0;
isp->sbl_resources |= res;
if (isp->sbl_resources & OMAP3_ISP_SBL_CSI1_READ)
sbl |= ISPCTRL_SBL_SHARED_RPORTA;
if (isp->sbl_resources & OMAP3_ISP_SBL_CCDC_LSC_READ)
sbl |= ISPCTRL_SBL_SHARED_RPORTB;
if (isp->sbl_resources & OMAP3_ISP_SBL_CSI2C_WRITE)
sbl |= ISPCTRL_SBL_SHARED_WPORTC;
if (isp->sbl_resources & OMAP3_ISP_SBL_RESIZER_WRITE)
sbl |= ISPCTRL_SBL_WR0_RAM_EN;
if (isp->sbl_resources & OMAP3_ISP_SBL_WRITE)
sbl |= ISPCTRL_SBL_WR1_RAM_EN;
if (isp->sbl_resources & OMAP3_ISP_SBL_READ)
sbl |= ISPCTRL_SBL_RD_RAM_EN;
isp_reg_set(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL, sbl);
}
void isp_sbl_disable(struct isp_device *isp, enum isp_sbl_resource res)
{
u32 sbl = 0;
isp->sbl_resources &= ~res;
if (!(isp->sbl_resources & OMAP3_ISP_SBL_CSI1_READ))
sbl |= ISPCTRL_SBL_SHARED_RPORTA;
if (!(isp->sbl_resources & OMAP3_ISP_SBL_CCDC_LSC_READ))
sbl |= ISPCTRL_SBL_SHARED_RPORTB;
if (!(isp->sbl_resources & OMAP3_ISP_SBL_CSI2C_WRITE))
sbl |= ISPCTRL_SBL_SHARED_WPORTC;
if (!(isp->sbl_resources & OMAP3_ISP_SBL_RESIZER_WRITE))
sbl |= ISPCTRL_SBL_WR0_RAM_EN;
if (!(isp->sbl_resources & OMAP3_ISP_SBL_WRITE))
sbl |= ISPCTRL_SBL_WR1_RAM_EN;
if (!(isp->sbl_resources & OMAP3_ISP_SBL_READ))
sbl |= ISPCTRL_SBL_RD_RAM_EN;
isp_reg_clr(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL, sbl);
}
/*
* isp_module_sync_idle - Helper to sync module with its idle state
* @me: ISP submodule's media entity
* @wait: ISP submodule's wait queue for streamoff/interrupt synchronization
* @stopping: flag which tells module wants to stop
*
* This function checks if ISP submodule needs to wait for next interrupt. If
* yes, makes the caller to sleep while waiting for such event.
*/
int isp_module_sync_idle(struct media_entity *me, wait_queue_head_t *wait,
atomic_t *stopping)
{
struct isp_pipeline *pipe = to_isp_pipeline(me);
if (pipe->stream_state == ISP_PIPELINE_STREAM_STOPPED ||
(pipe->stream_state == ISP_PIPELINE_STREAM_SINGLESHOT &&
!isp_pipeline_ready(pipe)))
return 0;
/*
* atomic_set() doesn't include memory barrier on ARM platform for SMP
* scenario. We'll call it here to avoid race conditions.
*/
atomic_set(stopping, 1);
smp_mb();
/*
* If module is the last one, it's writing to memory. In this case,
* it's necessary to check if the module is already paused due to
* DMA queue underrun or if it has to wait for next interrupt to be
* idle.
* If it isn't the last one, the function won't sleep but *stopping
* will still be set to warn next submodule caller's interrupt the
* module wants to be idle.
*/
if (isp_pipeline_is_last(me)) {
struct isp_video *video = pipe->output;
unsigned long flags;
spin_lock_irqsave(&video->queue->irqlock, flags);
if (video->dmaqueue_flags & ISP_VIDEO_DMAQUEUE_UNDERRUN) {
spin_unlock_irqrestore(&video->queue->irqlock, flags);
atomic_set(stopping, 0);
smp_mb();
return 0;
}
spin_unlock_irqrestore(&video->queue->irqlock, flags);
if (!wait_event_timeout(*wait, !atomic_read(stopping),
msecs_to_jiffies(1000))) {
atomic_set(stopping, 0);
smp_mb();
return -ETIMEDOUT;
}
}
return 0;
}
/*
* isp_module_sync_is_stopped - Helper to verify if module was stopping
* @wait: ISP submodule's wait queue for streamoff/interrupt synchronization
* @stopping: flag which tells module wants to stop
*
* This function checks if ISP submodule was stopping. In case of yes, it
* notices the caller by setting stopping to 0 and waking up the wait queue.
* Returns 1 if it was stopping or 0 otherwise.
*/
int isp_module_sync_is_stopping(wait_queue_head_t *wait, atomic_t *stopping)
{
if (atomic_cmpxchg(stopping, 1, 0)) {
wake_up(wait);
return 1;
}
return 0;
}
/* --------------------------------------------------------------------------
* Clock management
*/
#define ISPCTRL_CLKS_MASK (ISPCTRL_H3A_CLK_EN | \
ISPCTRL_HIST_CLK_EN | \
ISPCTRL_RSZ_CLK_EN | \
(ISPCTRL_CCDC_CLK_EN | ISPCTRL_CCDC_RAM_EN) | \
(ISPCTRL_PREV_CLK_EN | ISPCTRL_PREV_RAM_EN))
static void __isp_subclk_update(struct isp_device *isp)
{
u32 clk = 0;
if (isp->subclk_resources & OMAP3_ISP_SUBCLK_H3A)
clk |= ISPCTRL_H3A_CLK_EN;
if (isp->subclk_resources & OMAP3_ISP_SUBCLK_HIST)
clk |= ISPCTRL_HIST_CLK_EN;
if (isp->subclk_resources & OMAP3_ISP_SUBCLK_RESIZER)
clk |= ISPCTRL_RSZ_CLK_EN;
/* NOTE: For CCDC & Preview submodules, we need to affect internal
* RAM aswell.
*/
if (isp->subclk_resources & OMAP3_ISP_SUBCLK_CCDC)
clk |= ISPCTRL_CCDC_CLK_EN | ISPCTRL_CCDC_RAM_EN;
if (isp->subclk_resources & OMAP3_ISP_SUBCLK_PREVIEW)
clk |= ISPCTRL_PREV_CLK_EN | ISPCTRL_PREV_RAM_EN;
isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL,
ISPCTRL_CLKS_MASK, clk);
}
void isp_subclk_enable(struct isp_device *isp, enum isp_subclk_resource res)
{
isp->subclk_resources |= res;
__isp_subclk_update(isp);
}
void isp_subclk_disable(struct isp_device *isp, enum isp_subclk_resource res)
{
isp->subclk_resources &= ~res;
__isp_subclk_update(isp);
}
/*
* isp_enable_clocks - Enable ISP clocks
* @isp: OMAP3 ISP device
*
* Return 0 if successful, or clk_enable return value if any of tthem fails.
*/
static int isp_enable_clocks(struct isp_device *isp)
{
int r;
unsigned long rate;
int divisor;
/*
* cam_mclk clock chain:
* dpll4 -> dpll4_m5 -> dpll4_m5x2 -> cam_mclk
*
* In OMAP3630 dpll4_m5x2 != 2 x dpll4_m5 but both are
* set to the same value. Hence the rate set for dpll4_m5
* has to be twice of what is set on OMAP3430 to get
* the required value for cam_mclk
*/
if (cpu_is_omap3630())
divisor = 1;
else
divisor = 2;
r = clk_enable(isp->clock[ISP_CLK_CAM_ICK]);
if (r) {
dev_err(isp->dev, "clk_enable cam_ick failed\n");
goto out_clk_enable_ick;
}
r = clk_set_rate(isp->clock[ISP_CLK_DPLL4_M5_CK],
CM_CAM_MCLK_HZ/divisor);
if (r) {
dev_err(isp->dev, "clk_set_rate for dpll4_m5_ck failed\n");
goto out_clk_enable_mclk;
}
r = clk_enable(isp->clock[ISP_CLK_CAM_MCLK]);
if (r) {
dev_err(isp->dev, "clk_enable cam_mclk failed\n");
goto out_clk_enable_mclk;
}
rate = clk_get_rate(isp->clock[ISP_CLK_CAM_MCLK]);
if (rate != CM_CAM_MCLK_HZ)
dev_warn(isp->dev, "unexpected cam_mclk rate:\n"
" expected : %d\n"
" actual : %ld\n", CM_CAM_MCLK_HZ, rate);
r = clk_enable(isp->clock[ISP_CLK_CSI2_FCK]);
if (r) {
dev_err(isp->dev, "clk_enable csi2_fck failed\n");
goto out_clk_enable_csi2_fclk;
}
return 0;
out_clk_enable_csi2_fclk:
clk_disable(isp->clock[ISP_CLK_CAM_MCLK]);
out_clk_enable_mclk:
clk_disable(isp->clock[ISP_CLK_CAM_ICK]);
out_clk_enable_ick:
return r;
}
/*
* isp_disable_clocks - Disable ISP clocks
* @isp: OMAP3 ISP device
*/
static void isp_disable_clocks(struct isp_device *isp)
{
clk_disable(isp->clock[ISP_CLK_CAM_ICK]);
clk_disable(isp->clock[ISP_CLK_CAM_MCLK]);
clk_disable(isp->clock[ISP_CLK_CSI2_FCK]);
}
static const char *isp_clocks[] = {
"cam_ick",
"cam_mclk",
"dpll4_m5_ck",
"csi2_96m_fck",
"l3_ick",
};
static void isp_put_clocks(struct isp_device *isp)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(isp_clocks); ++i) {
if (isp->clock[i]) {
clk_put(isp->clock[i]);
isp->clock[i] = NULL;
}
}
}
static int isp_get_clocks(struct isp_device *isp)
{
struct clk *clk;
unsigned int i;
for (i = 0; i < ARRAY_SIZE(isp_clocks); ++i) {
clk = clk_get(isp->dev, isp_clocks[i]);
if (IS_ERR(clk)) {
dev_err(isp->dev, "clk_get %s failed\n", isp_clocks[i]);
isp_put_clocks(isp);
return PTR_ERR(clk);
}
isp->clock[i] = clk;
}
return 0;
}
/*
* isp_get - Acquire the ISP resource.
*
* Initializes the clocks for the first acquire.
*
* Increment the reference count on the ISP. If the first reference is taken,
* enable clocks and power-up all submodules.
*
* Return a pointer to the ISP device structure, or NULL if an error occured.
*/
struct isp_device *isp_get(struct isp_device *isp)
{
struct isp_device *__isp = isp;
if (isp == NULL)
return NULL;
mutex_lock(&isp->isp_mutex);
if (isp->ref_count > 0)
goto out;
if (isp_enable_clocks(isp) < 0) {
__isp = NULL;
goto out;
}
/* We don't want to restore context before saving it! */
if (isp->has_context)
isp_restore_ctx(isp);
else
isp->has_context = 1;
isp_enable_interrupts(isp);
out:
if (__isp != NULL)
isp->ref_count++;
mutex_unlock(&isp->isp_mutex);
return __isp;
}
/*
* isp_put - Release the ISP
*
* Decrement the reference count on the ISP. If the last reference is released,
* power-down all submodules, disable clocks and free temporary buffers.
*/
void isp_put(struct isp_device *isp)
{
if (isp == NULL)
return;
mutex_lock(&isp->isp_mutex);
BUG_ON(isp->ref_count == 0);
if (--isp->ref_count == 0) {
isp_disable_interrupts(isp);
isp_save_ctx(isp);
isp_disable_clocks(isp);
}
mutex_unlock(&isp->isp_mutex);
}
/* --------------------------------------------------------------------------
* Platform device driver
*/
/*
* isp_print_status - Prints the values of the ISP Control Module registers
* @isp: OMAP3 ISP device
*/
#define ISP_PRINT_REGISTER(isp, name)\
dev_dbg(isp->dev, "###ISP " #name "=0x%08x\n", \
isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_##name))
#define SBL_PRINT_REGISTER(isp, name)\
dev_dbg(isp->dev, "###SBL " #name "=0x%08x\n", \
isp_reg_readl(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_##name))
void isp_print_status(struct isp_device *isp)
{
dev_dbg(isp->dev, "-------------ISP Register dump--------------\n");
ISP_PRINT_REGISTER(isp, SYSCONFIG);
ISP_PRINT_REGISTER(isp, SYSSTATUS);
ISP_PRINT_REGISTER(isp, IRQ0ENABLE);
ISP_PRINT_REGISTER(isp, IRQ0STATUS);
ISP_PRINT_REGISTER(isp, TCTRL_GRESET_LENGTH);
ISP_PRINT_REGISTER(isp, TCTRL_PSTRB_REPLAY);
ISP_PRINT_REGISTER(isp, CTRL);
ISP_PRINT_REGISTER(isp, TCTRL_CTRL);
ISP_PRINT_REGISTER(isp, TCTRL_FRAME);
ISP_PRINT_REGISTER(isp, TCTRL_PSTRB_DELAY);
ISP_PRINT_REGISTER(isp, TCTRL_STRB_DELAY);
ISP_PRINT_REGISTER(isp, TCTRL_SHUT_DELAY);
ISP_PRINT_REGISTER(isp, TCTRL_PSTRB_LENGTH);
ISP_PRINT_REGISTER(isp, TCTRL_STRB_LENGTH);
ISP_PRINT_REGISTER(isp, TCTRL_SHUT_LENGTH);
SBL_PRINT_REGISTER(isp, PCR);
SBL_PRINT_REGISTER(isp, SDR_REQ_EXP);
dev_dbg(isp->dev, "--------------------------------------------\n");
}
#ifdef CONFIG_PM
/*
* Power management support.
*
* As the ISP can't properly handle an input video stream interruption on a non
* frame boundary, the ISP pipelines need to be stopped before sensors get
* suspended. However, as suspending the sensors can require a running clock,
* which can be provided by the ISP, the ISP can't be completely suspended
* before the sensor.
*
* To solve this problem power management support is split into prepare/complete
* and suspend/resume operations. The pipelines are stopped in prepare() and the
* ISP clocks get disabled in suspend(). Similarly, the clocks are reenabled in
* resume(), and the the pipelines are restarted in complete().
*
* TODO: PM dependencies between the ISP and sensors are not modeled explicitly
* yet.
*/
static int isp_pm_prepare(struct device *dev)
{
struct isp_device *isp = dev_get_drvdata(dev);
int reset;
WARN_ON(mutex_is_locked(&isp->isp_mutex));
if (isp->ref_count == 0)
return 0;
reset = isp_suspend_modules(isp);
isp_disable_interrupts(isp);
isp_save_ctx(isp);
if (reset)
isp_reset(isp);
return 0;
}
static int isp_pm_suspend(struct device *dev)
{
struct isp_device *isp = dev_get_drvdata(dev);
WARN_ON(mutex_is_locked(&isp->isp_mutex));
if (isp->ref_count)
isp_disable_clocks(isp);
return 0;
}
static int isp_pm_resume(struct device *dev)
{
struct isp_device *isp = dev_get_drvdata(dev);
if (isp->ref_count == 0)
return 0;
return isp_enable_clocks(isp);
}
static void isp_pm_complete(struct device *dev)
{
struct isp_device *isp = dev_get_drvdata(dev);
if (isp->ref_count == 0)
return;
isp_restore_ctx(isp);
isp_enable_interrupts(isp);
isp_resume_modules(isp);
}
#else
#define isp_pm_prepare NULL
#define isp_pm_suspend NULL
#define isp_pm_resume NULL
#define isp_pm_complete NULL
#endif /* CONFIG_PM */
static void isp_unregister_entities(struct isp_device *isp)
{
isp_csi2_unregister_entities(&isp->isp_csi2a);
isp_ccp2_unregister_entities(&isp->isp_ccp2);
isp_ccdc_unregister_entities(&isp->isp_ccdc);
isp_preview_unregister_entities(&isp->isp_prev);
isp_resizer_unregister_entities(&isp->isp_res);
ispstat_unregister_entities(&isp->isp_aewb);
ispstat_unregister_entities(&isp->isp_af);
ispstat_unregister_entities(&isp->isp_hist);
v4l2_device_unregister(&isp->v4l2_dev);
media_device_unregister(&isp->media_dev);
}
/*
* isp_register_subdev_group - Register a group of subdevices
* @isp: OMAP3 ISP device
* @board_info: I2C subdevs board information array
*
* Register all I2C subdevices in the board_info array. The array must be
* terminated by a NULL entry, and the first entry must be the sensor.
*
* Return a pointer to the sensor media entity if it has been successfully
* registered, or NULL otherwise.
*/
static struct v4l2_subdev *
isp_register_subdev_group(struct isp_device *isp,
struct isp_subdev_i2c_board_info *board_info)
{
struct v4l2_subdev *sensor = NULL;
unsigned int first;
if (board_info->board_info == NULL)
return NULL;
for (first = 1; board_info->board_info; ++board_info, first = 0) {
struct v4l2_subdev *subdev;
struct i2c_adapter *adapter;
adapter = i2c_get_adapter(board_info->i2c_adapter_id);
if (adapter == NULL) {
printk(KERN_ERR "%s: Unable to get I2C adapter %d for "
"device %s\n", __func__,
board_info->i2c_adapter_id,
board_info->board_info->type);
continue;
}
subdev = v4l2_i2c_new_subdev_board(&isp->v4l2_dev, adapter,
board_info->board_info, NULL, 1);
if (subdev == NULL) {
printk(KERN_ERR "%s: Unable to register subdev %s\n",
__func__, board_info->board_info->type);
continue;
}
if (first)
sensor = subdev;
}
return sensor;
}
static int isp_register_entities(struct isp_device *isp)
{
struct isp_platform_data *pdata = isp->pdata;
struct isp_v4l2_subdevs_group *subdevs;
int ret;
isp->media_dev.dev = isp->dev;
strlcpy(isp->media_dev.model, "TI OMAP3 ISP",
sizeof(isp->media_dev.model));
isp->media_dev.link_notify = isp_pipeline_link_notify;
ret = media_device_register(&isp->media_dev);
if (ret < 0) {
printk(KERN_ERR "%s: Media device registration failed (%d)\n",
__func__, ret);
return ret;
}
isp->v4l2_dev.mdev = &isp->media_dev;
ret = v4l2_device_register(isp->dev, &isp->v4l2_dev);
if (ret < 0) {
printk(KERN_ERR "%s: V4L2 device registration failed (%d)\n",
__func__, ret);
goto done;
}
/* Register internal entities */
ret = isp_ccp2_register_entities(&isp->isp_ccp2, &isp->v4l2_dev);
if (ret < 0)
goto done;
ret = isp_csi2_register_entities(&isp->isp_csi2a, &isp->v4l2_dev);
if (ret < 0)
goto done;
ret = isp_ccdc_register_entities(&isp->isp_ccdc, &isp->v4l2_dev);
if (ret < 0)
goto done;
ret = isp_preview_register_entities(&isp->isp_prev, &isp->v4l2_dev);
if (ret < 0)
goto done;
ret = isp_resizer_register_entities(&isp->isp_res, &isp->v4l2_dev);
if (ret < 0)
goto done;
ret = ispstat_register_entities(&isp->isp_aewb, &isp->v4l2_dev);
if (ret < 0)
goto done;
ret = ispstat_register_entities(&isp->isp_af, &isp->v4l2_dev);
if (ret < 0)
goto done;
ret = ispstat_register_entities(&isp->isp_hist, &isp->v4l2_dev);
if (ret < 0)
goto done;
/* Register external entities */
for (subdevs = pdata->subdevs; subdevs->subdevs; ++subdevs) {
struct v4l2_subdev *sensor;
struct media_entity *input;
unsigned int flags;
unsigned int pad;
sensor = isp_register_subdev_group(isp, subdevs->subdevs);
if (sensor == NULL)
continue;
sensor->host_priv = subdevs;
/* Connect the sensor to the correct interface module. Parallel
* sensors are connected directly to the CCDC, while serial
* sensors are connected to the CSI2a, CCP2b or CSI2c receiver
* through CSIPHY1 or CSIPHY2.
*/
switch (subdevs->interface) {
case ISP_INTERFACE_PARALLEL:
input = &isp->isp_ccdc.subdev.entity;
pad = CCDC_PAD_SINK;
flags = 0;
break;
case ISP_INTERFACE_CSI2A_PHY2:
input = &isp->isp_csi2a.subdev.entity;
pad = CSI2_PAD_SINK;
flags = MEDIA_LINK_FLAG_IMMUTABLE
| MEDIA_LINK_FLAG_ENABLED;
break;
case ISP_INTERFACE_CCP2B_PHY1:
case ISP_INTERFACE_CCP2B_PHY2:
input = &isp->isp_ccp2.subdev.entity;
pad = CCP2_PAD_SINK;
flags = 0;
break;
case ISP_INTERFACE_CSI2C_PHY1:
input = &isp->isp_csi2c.subdev.entity;
pad = CSI2_PAD_SINK;
flags = MEDIA_LINK_FLAG_IMMUTABLE
| MEDIA_LINK_FLAG_ENABLED;
break;
default:
printk(KERN_ERR "%s: invalid interface type %u\n",
__func__, subdevs->interface);
ret = -EINVAL;
goto done;
}
ret = media_entity_create_link(&sensor->entity, 0, input, pad,
flags);
if (ret < 0)
goto done;
}
done:
if (ret < 0)
isp_unregister_entities(isp);
return ret;
}
static void isp_cleanup_modules(struct isp_device *isp)
{
isp_h3a_aewb_cleanup(isp);
isp_h3a_af_cleanup(isp);
isp_hist_cleanup(isp);
isp_resizer_cleanup(isp);
isp_preview_cleanup(isp);
isp_ccdc_cleanup(isp);
isp_ccp2_cleanup(isp);
isp_csi2_cleanup(isp);
}
static int isp_initialize_modules(struct isp_device *isp)
{
int ret;
ret = isp_csiphy_init(isp);
if (ret < 0) {
dev_err(isp->dev, "CSI PHY initialization failed\n");
goto error_csiphy;
}
ret = isp_csi2_init(isp);
if (ret < 0) {
dev_err(isp->dev, "CSI2 initialization failed\n");
goto error_csi2;
}
ret = isp_ccp2_init(isp);
if (ret < 0) {
dev_err(isp->dev, "CCP2 initialization failed\n");
goto error_ccp2;
}
ret = isp_ccdc_init(isp);
if (ret < 0) {
dev_err(isp->dev, "CCDC initialization failed\n");
goto error_ccdc;
}
ret = isp_preview_init(isp);
if (ret < 0) {
dev_err(isp->dev, "Preview initialization failed\n");
goto error_preview;
}
ret = isp_resizer_init(isp);
if (ret < 0) {
dev_err(isp->dev, "Resizer initialization failed\n");
goto error_resizer;
}
ret = isp_hist_init(isp);
if (ret < 0) {
dev_err(isp->dev, "Histogram initialization failed\n");
goto error_hist;
}
ret = isp_h3a_aewb_init(isp);
if (ret < 0) {
dev_err(isp->dev, "H3A AEWB initialization failed\n");
goto error_h3a_aewb;
}
ret = isp_h3a_af_init(isp);
if (ret < 0) {
dev_err(isp->dev, "H3A AF initialization failed\n");
goto error_h3a_af;
}
/* Connect the submodules. */
ret = media_entity_create_link(
&isp->isp_csi2a.subdev.entity, CSI2_PAD_SOURCE,
&isp->isp_ccdc.subdev.entity, CCDC_PAD_SINK, 0);
if (ret < 0)
goto error_link;
ret = media_entity_create_link(
&isp->isp_ccp2.subdev.entity, CCP2_PAD_SOURCE,
&isp->isp_ccdc.subdev.entity, CCDC_PAD_SINK, 0);
if (ret < 0)
goto error_link;
ret = media_entity_create_link(
&isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_VP,
&isp->isp_prev.subdev.entity, PREV_PAD_SINK, 0);
if (ret < 0)
goto error_link;
ret = media_entity_create_link(
&isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_OF,
&isp->isp_res.subdev.entity, RESZ_PAD_SINK, 0);
if (ret < 0)
goto error_link;
ret = media_entity_create_link(
&isp->isp_prev.subdev.entity, PREV_PAD_SOURCE,
&isp->isp_res.subdev.entity, RESZ_PAD_SINK, 0);
if (ret < 0)
goto error_link;
ret = media_entity_create_link(
&isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_VP,
&isp->isp_aewb.subdev.entity, 0,
MEDIA_LINK_FLAG_ENABLED | MEDIA_LINK_FLAG_IMMUTABLE);
if (ret < 0)
goto error_link;
ret = media_entity_create_link(
&isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_VP,
&isp->isp_af.subdev.entity, 0,
MEDIA_LINK_FLAG_ENABLED | MEDIA_LINK_FLAG_IMMUTABLE);
if (ret < 0)
goto error_link;
ret = media_entity_create_link(
&isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_VP,
&isp->isp_hist.subdev.entity, 0,
MEDIA_LINK_FLAG_ENABLED | MEDIA_LINK_FLAG_IMMUTABLE);
if (ret < 0)
goto error_link;
return 0;
error_link:
isp_h3a_af_cleanup(isp);
error_h3a_af:
isp_h3a_aewb_cleanup(isp);
error_h3a_aewb:
isp_hist_cleanup(isp);
error_hist:
isp_resizer_cleanup(isp);
error_resizer:
isp_preview_cleanup(isp);
error_preview:
isp_ccdc_cleanup(isp);
error_ccdc:
isp_ccp2_cleanup(isp);
error_ccp2:
isp_csi2_cleanup(isp);
error_csi2:
error_csiphy:
return ret;
}
/*
* isp_remove - Remove ISP platform device
* @pdev: Pointer to ISP platform device
*
* Always returns 0.
*/
static int isp_remove(struct platform_device *pdev)
{
struct isp_device *isp = platform_get_drvdata(pdev);
int i;
isp_unregister_entities(isp);
isp_cleanup_modules(isp);
isp_get(isp);
iommu_put(isp->iommu);
isp_put(isp);
free_irq(isp->irq_num, isp);
isp_put_clocks(isp);
for (i = 0; i < OMAP3_ISP_IOMEM_LAST; i++) {
if (isp->mmio_base[i]) {
iounmap(isp->mmio_base[i]);
isp->mmio_base[i] = NULL;
}
if (isp->mmio_base_phys[i]) {
release_mem_region(isp->mmio_base_phys[i],
isp->mmio_size[i]);
isp->mmio_base_phys[i] = 0;
}
}
regulator_put(isp->isp_csiphy1.vdd);
regulator_put(isp->isp_csiphy2.vdd);
kfree(isp);
return 0;
}
static int isp_map_mem_resource(struct platform_device *pdev,
struct isp_device *isp,
enum isp_mem_resources res)
{
struct resource *mem;
/* request the mem region for the camera registers */
mem = platform_get_resource(pdev, IORESOURCE_MEM, res);
if (!mem) {
dev_err(isp->dev, "no mem resource?\n");
return -ENODEV;
}
if (!request_mem_region(mem->start, resource_size(mem), pdev->name)) {
dev_err(isp->dev,
"cannot reserve camera register I/O region\n");
return -ENODEV;
}
isp->mmio_base_phys[res] = mem->start;
isp->mmio_size[res] = resource_size(mem);
/* map the region */
isp->mmio_base[res] = ioremap_nocache(isp->mmio_base_phys[res],
isp->mmio_size[res]);
if (!isp->mmio_base[res]) {
dev_err(isp->dev, "cannot map camera register I/O region\n");
return -ENODEV;
}
return 0;
}
/*
* isp_probe - Probe ISP platform device
* @pdev: Pointer to ISP platform device
*
* Returns 0 if successful,
* -ENOMEM if no memory available,
* -ENODEV if no platform device resources found
* or no space for remapping registers,
* -EINVAL if couldn't install ISR,
* or clk_get return error value.
*/
static int isp_probe(struct platform_device *pdev)
{
struct isp_platform_data *pdata = pdev->dev.platform_data;
struct isp_device *isp;
int ret;
int i, m;
if (pdata == NULL)
return -EINVAL;
isp = kzalloc(sizeof(*isp), GFP_KERNEL);
if (!isp) {
dev_err(&pdev->dev, "could not allocate memory\n");
return -ENOMEM;
}
isp->platform_cb.set_xclk = isp_set_xclk;
isp->platform_cb.set_pixel_clock = isp_set_pixel_clock;
mutex_init(&isp->isp_mutex);
spin_lock_init(&isp->stat_lock);
isp->dev = &pdev->dev;
isp->pdata = pdata;
isp->ref_count = 0;
isp->raw_dmamask = DMA_BIT_MASK(32);
isp->dev->dma_mask = &isp->raw_dmamask;
isp->dev->coherent_dma_mask = DMA_BIT_MASK(32);
platform_set_drvdata(pdev, isp);
/* Regulators */
isp->isp_csiphy1.vdd = regulator_get(&pdev->dev, "VDD_CSIPHY1");
isp->isp_csiphy2.vdd = regulator_get(&pdev->dev, "VDD_CSIPHY2");
/* Clocks */
ret = isp_map_mem_resource(pdev, isp, OMAP3_ISP_IOMEM_MAIN);
if (ret < 0)
goto error;
ret = isp_get_clocks(isp);
if (ret < 0)
goto error;
if (isp_get(isp) == NULL)
goto error;
ret = isp_reset(isp);
if (ret < 0)
goto error_isp;
/* Memory resources */
isp->revision = isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_REVISION);
dev_info(isp->dev, "Revision %d.%d found\n",
(isp->revision & 0xf0) >> 4, isp->revision & 0x0f);
for (m = 0; m < ARRAY_SIZE(isp_res_maps); m++)
if (isp->revision == isp_res_maps[m].isp_rev)
break;
if (m == ARRAY_SIZE(isp_res_maps)) {
dev_err(isp->dev, "No resource map found for ISP rev %d.%d\n",
(isp->revision & 0xf0) >> 4, isp->revision & 0xf);
ret = -ENODEV;
goto error_isp;
}
for (i = 1; i < OMAP3_ISP_IOMEM_LAST; i++) {
if (isp_res_maps[m].map & 1 << i) {
ret = isp_map_mem_resource(pdev, isp, i);
if (ret)
goto error_isp;
}
}
/* IOMMU */
isp->iommu = iommu_get("isp");
if (IS_ERR_OR_NULL(isp->iommu)) {
isp->iommu = NULL;
ret = -ENODEV;
goto error_isp;
}
/* Interrupt */
isp->irq_num = platform_get_irq(pdev, 0);
if (isp->irq_num <= 0) {
dev_err(isp->dev, "No IRQ resource\n");
ret = -ENODEV;
goto error_isp;
}
if (request_irq(isp->irq_num, isp_isr, IRQF_SHARED, "OMAP3 ISP", isp)) {
dev_err(isp->dev, "Unable to request IRQ\n");
ret = -EINVAL;
goto error_isp;
}
/* Entities */
ret = isp_initialize_modules(isp);
if (ret < 0)
goto error_irq;
ret = isp_register_entities(isp);
if (ret < 0)
goto error_modules;
isp_power_settings(isp, 1);
isp_put(isp);
return 0;
error_modules:
isp_cleanup_modules(isp);
error_irq:
free_irq(isp->irq_num, isp);
error_isp:
iommu_put(isp->iommu);
isp_put(isp);
error:
isp_put_clocks(isp);
for (i = 0; i < OMAP3_ISP_IOMEM_LAST; i++) {
if (isp->mmio_base[i]) {
iounmap(isp->mmio_base[i]);
isp->mmio_base[i] = NULL;
}
if (isp->mmio_base_phys[i]) {
release_mem_region(isp->mmio_base_phys[i],
isp->mmio_size[i]);
isp->mmio_base_phys[i] = 0;
}
}
regulator_put(isp->isp_csiphy2.vdd);
regulator_put(isp->isp_csiphy1.vdd);
platform_set_drvdata(pdev, NULL);
kfree(isp);
return ret;
}
static const struct dev_pm_ops omap3isp_pm_ops = {
.prepare = isp_pm_prepare,
.suspend = isp_pm_suspend,
.resume = isp_pm_resume,
.complete = isp_pm_complete,
};
static struct platform_driver omap3isp_driver = {
.probe = isp_probe,
.remove = isp_remove,
.driver = {
.owner = THIS_MODULE,
.name = "omap3isp",
.pm = &omap3isp_pm_ops,
},
};
/*
* isp_init - ISP module initialization.
*/
static int __init isp_init(void)
{
return platform_driver_register(&omap3isp_driver);
}
/*
* isp_cleanup - ISP module cleanup.
*/
static void __exit isp_cleanup(void)
{
platform_driver_unregister(&omap3isp_driver);
}
module_init(isp_init);
module_exit(isp_cleanup);
MODULE_AUTHOR("Nokia Corporation");
MODULE_DESCRIPTION("TI OMAP3 ISP driver");
MODULE_LICENSE("GPL");