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android_kernel_motorola_sm6225/drivers/media/video/omap3isp/isp.c
Laurent Pinchart e2241531a5 [media] omap3isp: Don't increment node entity use count when poweron fails 
When open a device node, all entities part of the same pipeline are
powered on. If one of the entities fails to be powered on, the open
operations fails. In that case the device node entity use count must not
be incremented.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-04-19 11:28:42 -03:00

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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@iki.fi>
*
* Contributors:
* Laurent Pinchart <laurent.pinchart@ideasonboard.com>
* Sakari Ailus <sakari.ailus@iki.fi>
* David Cohen <dacohen@gmail.com>
* Stanimir Varbanov <svarbanov@mm-sol.com>
* Vimarsh Zutshi <vimarsh.zutshi@gmail.com>
* Tuukka Toivonen <tuukkat76@gmail.com>
* Sergio Aguirre <saaguirre@ti.com>
* Antti Koskipaa <akoskipa@gmail.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/module.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 unsigned int autoidle;
module_param(autoidle, int, 0444);
MODULE_PARM_DESC(autoidle, "Enable OMAP3ISP AUTOIDLE support");
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}
};
/*
* omap3isp_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 omap3isp_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 (!omap3isp_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 ISP_XCLK_A:
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 ISP_XCLK_B:
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;
case ISP_XCLK_NONE:
default:
omap3isp_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 - 1] < 2)
omap3isp_get(isp);
/* Stopping the clock. */
else if (divisor < 2 && isp->xclk_divisor[xclksel - 1] >= 2)
omap3isp_put(isp);
isp->xclk_divisor[xclksel - 1] = divisor;
omap3isp_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) |
((isp->revision == ISP_REVISION_15_0) ?
ISP_SYSCONFIG_AUTOIDLE : 0),
OMAP3_ISP_IOMEM_MAIN, ISP_SYSCONFIG);
if (isp->autoidle)
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 omap3isp_configure_bridge(struct isp_device *isp,
enum ccdc_input_entity input,
const struct isp_parallel_platform_data *pdata,
unsigned int shift)
{
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->clk_pol << ISPCTRL_PAR_CLK_POL_SHIFT;
ispctrl_val |= pdata->bridge << ISPCTRL_PAR_BRIDGE_SHIFT;
shift += pdata->data_lane_shift * 2;
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 |= ((shift/2) << ISPCTRL_SHIFT_SHIFT) & ISPCTRL_SHIFT_MASK;
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 omap3isp_hist_dma_done(struct isp_device *isp)
{
if (omap3isp_ccdc_busy(&isp->isp_ccdc) ||
omap3isp_stat_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, "");
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)
omap3isp_stat_sbl_overflow(&isp->isp_af);
if (sbl_pcr & ISPSBL_PCR_H3A_AEAWB_WBL_OVF)
omap3isp_stat_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 = omap3isp_csi2_isr(&isp->isp_csi2a);
if (ret)
isp->isp_ccdc.error = 1;
}
if (irqstatus & IRQ0STATUS_CSIB_IRQ) {
ret = omap3isp_ccp2_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)
omap3isp_preview_isr_frame_sync(&isp->isp_prev);
if (isp->isp_ccdc.output & CCDC_OUTPUT_RESIZER)
omap3isp_resizer_isr_frame_sync(&isp->isp_res);
omap3isp_stat_isr_frame_sync(&isp->isp_aewb);
omap3isp_stat_isr_frame_sync(&isp->isp_af);
omap3isp_stat_isr_frame_sync(&isp->isp_hist);
}
if (irqstatus & ccdc_events)
omap3isp_ccdc_isr(&isp->isp_ccdc, irqstatus & ccdc_events);
if (irqstatus & IRQ0STATUS_PRV_DONE_IRQ) {
if (isp->isp_prev.output & PREVIEW_OUTPUT_RESIZER)
omap3isp_resizer_isr_frame_sync(&isp->isp_res);
omap3isp_preview_isr(&isp->isp_prev);
}
if (irqstatus & IRQ0STATUS_RSZ_DONE_IRQ)
omap3isp_resizer_isr(&isp->isp_res);
if (irqstatus & IRQ0STATUS_H3A_AWB_DONE_IRQ)
omap3isp_stat_isr(&isp->isp_aewb);
if (irqstatus & IRQ0STATUS_H3A_AF_DONE_IRQ)
omap3isp_stat_isr(&isp->isp_af);
if (irqstatus & IRQ0STATUS_HIST_DONE_IRQ)
omap3isp_stat_isr(&isp->isp_hist);
omap3isp_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_ENT_T_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_ENT_T_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_ENT_T_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_ENT_T_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);
if (ret < 0)
entity->use_count -= 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_LNK_FL_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 successful, 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_FL_SINK))
break;
pad = media_entity_remote_source(pad);
if (pad == NULL ||
media_entity_type(pad->entity) != MEDIA_ENT_T_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 omap3isp_resizer_busy(&isp->isp_res);
}
static int isp_pipeline_wait_preview(struct isp_device *isp)
{
return omap3isp_preview_busy(&isp->isp_prev);
}
static int isp_pipeline_wait_ccdc(struct isp_device *isp)
{
return omap3isp_stat_busy(&isp->isp_af)
|| omap3isp_stat_busy(&isp->isp_aewb)
|| omap3isp_stat_busy(&isp->isp_hist)
|| omap3isp_ccdc_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_FL_SINK))
break;
pad = media_entity_remote_source(pad);
if (pad == NULL ||
media_entity_type(pad->entity) != MEDIA_ENT_T_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;
}
}
if (failure < 0)
isp->needs_reset = true;
return failure;
}
/*
* omap3isp_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 successful, or the return value of the failed video::s_stream
* operation otherwise. The pipeline state is not updated when the operation
* fails, except when stopping the pipeline.
*/
int omap3isp_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);
if (ret == 0 || state == ISP_PIPELINE_STREAM_STOPPED)
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;
omap3isp_video_resume(pipe->output, !singleshot);
if (singleshot)
omap3isp_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 enabled 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;
omap3isp_stat_suspend(&isp->isp_aewb);
omap3isp_stat_suspend(&isp->isp_af);
omap3isp_stat_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 (omap3isp_stat_busy(&isp->isp_af)
|| omap3isp_stat_busy(&isp->isp_aewb)
|| omap3isp_stat_busy(&isp->isp_hist)
|| omap3isp_preview_busy(&isp->isp_prev)
|| omap3isp_resizer_busy(&isp->isp_res)
|| omap3isp_ccdc_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)
{
omap3isp_stat_resume(&isp->isp_aewb);
omap3isp_stat_resume(&isp->isp_af);
omap3isp_stat_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);
omap3isp_ccdc_restore_context(isp);
omap3isp_preview_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 omap3isp_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 omap3isp_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 omap3isp_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;
}
/*
* omap3isp_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 omap3isp_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 omap3isp_subclk_enable(struct isp_device *isp,
enum isp_subclk_resource res)
{
isp->subclk_resources |= res;
__isp_subclk_update(isp);
}
void omap3isp_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;
}
/*
* omap3isp_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 *omap3isp_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;
}
/*
* omap3isp_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 omap3isp_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);
if (isp->needs_reset) {
isp_reset(isp);
isp->needs_reset = false;
}
isp_disable_clocks(isp);
}
mutex_unlock(&isp->isp_mutex);
}
/* --------------------------------------------------------------------------
* Platform device driver
*/
/*
* omap3isp_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 omap3isp_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)
{
omap3isp_csi2_unregister_entities(&isp->isp_csi2a);
omap3isp_ccp2_unregister_entities(&isp->isp_ccp2);
omap3isp_ccdc_unregister_entities(&isp->isp_ccdc);
omap3isp_preview_unregister_entities(&isp->isp_prev);
omap3isp_resizer_unregister_entities(&isp->isp_res);
omap3isp_stat_unregister_entities(&isp->isp_aewb);
omap3isp_stat_unregister_entities(&isp->isp_af);
omap3isp_stat_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);
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 = omap3isp_ccp2_register_entities(&isp->isp_ccp2, &isp->v4l2_dev);
if (ret < 0)
goto done;
ret = omap3isp_csi2_register_entities(&isp->isp_csi2a, &isp->v4l2_dev);
if (ret < 0)
goto done;
ret = omap3isp_ccdc_register_entities(&isp->isp_ccdc, &isp->v4l2_dev);
if (ret < 0)
goto done;
ret = omap3isp_preview_register_entities(&isp->isp_prev,
&isp->v4l2_dev);
if (ret < 0)
goto done;
ret = omap3isp_resizer_register_entities(&isp->isp_res, &isp->v4l2_dev);
if (ret < 0)
goto done;
ret = omap3isp_stat_register_entities(&isp->isp_aewb, &isp->v4l2_dev);
if (ret < 0)
goto done;
ret = omap3isp_stat_register_entities(&isp->isp_af, &isp->v4l2_dev);
if (ret < 0)
goto done;
ret = omap3isp_stat_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_LNK_FL_IMMUTABLE
| MEDIA_LNK_FL_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_LNK_FL_IMMUTABLE
| MEDIA_LNK_FL_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;
}
ret = v4l2_device_register_subdev_nodes(&isp->v4l2_dev);
done:
if (ret < 0)
isp_unregister_entities(isp);
return ret;
}
static void isp_cleanup_modules(struct isp_device *isp)
{
omap3isp_h3a_aewb_cleanup(isp);
omap3isp_h3a_af_cleanup(isp);
omap3isp_hist_cleanup(isp);
omap3isp_resizer_cleanup(isp);
omap3isp_preview_cleanup(isp);
omap3isp_ccdc_cleanup(isp);
omap3isp_ccp2_cleanup(isp);
omap3isp_csi2_cleanup(isp);
}
static int isp_initialize_modules(struct isp_device *isp)
{
int ret;
ret = omap3isp_csiphy_init(isp);
if (ret < 0) {
dev_err(isp->dev, "CSI PHY initialization failed\n");
goto error_csiphy;
}
ret = omap3isp_csi2_init(isp);
if (ret < 0) {
dev_err(isp->dev, "CSI2 initialization failed\n");
goto error_csi2;
}
ret = omap3isp_ccp2_init(isp);
if (ret < 0) {
dev_err(isp->dev, "CCP2 initialization failed\n");
goto error_ccp2;
}
ret = omap3isp_ccdc_init(isp);
if (ret < 0) {
dev_err(isp->dev, "CCDC initialization failed\n");
goto error_ccdc;
}
ret = omap3isp_preview_init(isp);
if (ret < 0) {
dev_err(isp->dev, "Preview initialization failed\n");
goto error_preview;
}
ret = omap3isp_resizer_init(isp);
if (ret < 0) {
dev_err(isp->dev, "Resizer initialization failed\n");
goto error_resizer;
}
ret = omap3isp_hist_init(isp);
if (ret < 0) {
dev_err(isp->dev, "Histogram initialization failed\n");
goto error_hist;
}
ret = omap3isp_h3a_aewb_init(isp);
if (ret < 0) {
dev_err(isp->dev, "H3A AEWB initialization failed\n");
goto error_h3a_aewb;
}
ret = omap3isp_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_LNK_FL_ENABLED | MEDIA_LNK_FL_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_LNK_FL_ENABLED | MEDIA_LNK_FL_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_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE);
if (ret < 0)
goto error_link;
return 0;
error_link:
omap3isp_h3a_af_cleanup(isp);
error_h3a_af:
omap3isp_h3a_aewb_cleanup(isp);
error_h3a_aewb:
omap3isp_hist_cleanup(isp);
error_hist:
omap3isp_resizer_cleanup(isp);
error_resizer:
omap3isp_preview_cleanup(isp);
error_preview:
omap3isp_ccdc_cleanup(isp);
error_ccdc:
omap3isp_ccp2_cleanup(isp);
error_ccp2:
omap3isp_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);
omap3isp_get(isp);
iommu_put(isp->iommu);
omap3isp_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->autoidle = autoidle;
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 (omap3isp_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);
omap3isp_put(isp);
return 0;
error_modules:
isp_cleanup_modules(isp);
error_irq:
free_irq(isp->irq_num, isp);
error_isp:
iommu_put(isp->iommu);
omap3isp_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_device_id omap3isp_id_table[] = {
{ "omap3isp", 0 },
{ },
};
MODULE_DEVICE_TABLE(platform, omap3isp_id_table);
static struct platform_driver omap3isp_driver = {
.probe = isp_probe,
.remove = isp_remove,
.id_table = omap3isp_id_table,
.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");
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