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linux/drivers/media/platform/omap3isp/isp.c
Javier Martinez Canillas 2ec7debd44 media: omap3isp: zero-initialize the isp cam_xclk{a,b} initial data 
The struct clk_init_data init variable is declared in the isp_xclk_init()
function so is an automatic variable allocated in the stack. But it's not
explicitly zero-initialized, so some init fields are left uninitialized.

This causes the data structure to have undefined values that may confuse
the common clock framework when the clock is registered.

For example, the uninitialized .flags field could have the CLK_IS_CRITICAL
bit set, causing the framework to wrongly prepare the clk on registration.
This leads to the isp_xclk_prepare() callback being called, which in turn
calls to the omap3isp_get() function that increments the isp dev refcount.

Since this omap3isp_get() call is unexpected, this leads to an unbalanced
omap3isp_get() call that prevents the requested IRQ to be later enabled,
due the refcount not being 0 when the correct omap3isp_get() call happens.

Fixes: 9b28ee3c91 ("[media] omap3isp: Use the common clock framework")

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-06-28 09:21:58 -04:00

2413 lines
62 KiB
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@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.
*/
#include <asm/cacheflush.h>
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/omap-iommu.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/vmalloc.h>
#ifdef CONFIG_ARM_DMA_USE_IOMMU
#include <asm/dma-iommu.h>
#endif
#include <media/v4l2-common.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-device.h>
#include <media/v4l2-mc.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,
.offset = {
/* first MMIO area */
0x0000, /* base, len 0x0070 */
0x0400, /* ccp2, len 0x01f0 */
0x0600, /* ccdc, len 0x00a8 */
0x0a00, /* hist, len 0x0048 */
0x0c00, /* h3a, len 0x0060 */
0x0e00, /* preview, len 0x00a0 */
0x1000, /* resizer, len 0x00ac */
0x1200, /* sbl, len 0x00fc */
/* second MMIO area */
0x0000, /* csi2a, len 0x0170 */
0x0170, /* csiphy2, len 0x000c */
},
.phy_type = ISP_PHY_TYPE_3430,
},
{
.isp_rev = ISP_REVISION_15_0,
.offset = {
/* first MMIO area */
0x0000, /* base, len 0x0070 */
0x0400, /* ccp2, len 0x01f0 */
0x0600, /* ccdc, len 0x00a8 */
0x0a00, /* hist, len 0x0048 */
0x0c00, /* h3a, len 0x0060 */
0x0e00, /* preview, len 0x00a0 */
0x1000, /* resizer, len 0x00ac */
0x1200, /* sbl, len 0x00fc */
/* second MMIO area */
0x0000, /* csi2a, len 0x0170 (1st area) */
0x0170, /* csiphy2, len 0x000c */
0x01c0, /* csi2a, len 0x0040 (2nd area) */
0x0400, /* csi2c, len 0x0170 (1st area) */
0x0570, /* csiphy1, len 0x000c */
0x05c0, /* csi2c, len 0x0040 (2nd area) */
},
.phy_type = ISP_PHY_TYPE_3630,
},
};
/* 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);
}
/* -----------------------------------------------------------------------------
* XCLK
*/
#define to_isp_xclk(_hw) container_of(_hw, struct isp_xclk, hw)
static void isp_xclk_update(struct isp_xclk *xclk, u32 divider)
{
switch (xclk->id) {
case ISP_XCLK_A:
isp_reg_clr_set(xclk->isp, OMAP3_ISP_IOMEM_MAIN, ISP_TCTRL_CTRL,
ISPTCTRL_CTRL_DIVA_MASK,
divider << ISPTCTRL_CTRL_DIVA_SHIFT);
break;
case ISP_XCLK_B:
isp_reg_clr_set(xclk->isp, OMAP3_ISP_IOMEM_MAIN, ISP_TCTRL_CTRL,
ISPTCTRL_CTRL_DIVB_MASK,
divider << ISPTCTRL_CTRL_DIVB_SHIFT);
break;
}
}
static int isp_xclk_prepare(struct clk_hw *hw)
{
struct isp_xclk *xclk = to_isp_xclk(hw);
omap3isp_get(xclk->isp);
return 0;
}
static void isp_xclk_unprepare(struct clk_hw *hw)
{
struct isp_xclk *xclk = to_isp_xclk(hw);
omap3isp_put(xclk->isp);
}
static int isp_xclk_enable(struct clk_hw *hw)
{
struct isp_xclk *xclk = to_isp_xclk(hw);
unsigned long flags;
spin_lock_irqsave(&xclk->lock, flags);
isp_xclk_update(xclk, xclk->divider);
xclk->enabled = true;
spin_unlock_irqrestore(&xclk->lock, flags);
return 0;
}
static void isp_xclk_disable(struct clk_hw *hw)
{
struct isp_xclk *xclk = to_isp_xclk(hw);
unsigned long flags;
spin_lock_irqsave(&xclk->lock, flags);
isp_xclk_update(xclk, 0);
xclk->enabled = false;
spin_unlock_irqrestore(&xclk->lock, flags);
}
static unsigned long isp_xclk_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct isp_xclk *xclk = to_isp_xclk(hw);
return parent_rate / xclk->divider;
}
static u32 isp_xclk_calc_divider(unsigned long *rate, unsigned long parent_rate)
{
u32 divider;
if (*rate >= parent_rate) {
*rate = parent_rate;
return ISPTCTRL_CTRL_DIV_BYPASS;
}
if (*rate == 0)
*rate = 1;
divider = DIV_ROUND_CLOSEST(parent_rate, *rate);
if (divider >= ISPTCTRL_CTRL_DIV_BYPASS)
divider = ISPTCTRL_CTRL_DIV_BYPASS - 1;
*rate = parent_rate / divider;
return divider;
}
static long isp_xclk_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *parent_rate)
{
isp_xclk_calc_divider(&rate, *parent_rate);
return rate;
}
static int isp_xclk_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct isp_xclk *xclk = to_isp_xclk(hw);
unsigned long flags;
u32 divider;
divider = isp_xclk_calc_divider(&rate, parent_rate);
spin_lock_irqsave(&xclk->lock, flags);
xclk->divider = divider;
if (xclk->enabled)
isp_xclk_update(xclk, divider);
spin_unlock_irqrestore(&xclk->lock, flags);
dev_dbg(xclk->isp->dev, "%s: cam_xclk%c set to %lu Hz (div %u)\n",
__func__, xclk->id == ISP_XCLK_A ? 'a' : 'b', rate, divider);
return 0;
}
static const struct clk_ops isp_xclk_ops = {
.prepare = isp_xclk_prepare,
.unprepare = isp_xclk_unprepare,
.enable = isp_xclk_enable,
.disable = isp_xclk_disable,
.recalc_rate = isp_xclk_recalc_rate,
.round_rate = isp_xclk_round_rate,
.set_rate = isp_xclk_set_rate,
};
static const char *isp_xclk_parent_name = "cam_mclk";
static struct clk *isp_xclk_src_get(struct of_phandle_args *clkspec, void *data)
{
unsigned int idx = clkspec->args[0];
struct isp_device *isp = data;
if (idx >= ARRAY_SIZE(isp->xclks))
return ERR_PTR(-ENOENT);
return isp->xclks[idx].clk;
}
static int isp_xclk_init(struct isp_device *isp)
{
struct device_node *np = isp->dev->of_node;
struct clk_init_data init = { 0 };
unsigned int i;
for (i = 0; i < ARRAY_SIZE(isp->xclks); ++i)
isp->xclks[i].clk = ERR_PTR(-EINVAL);
for (i = 0; i < ARRAY_SIZE(isp->xclks); ++i) {
struct isp_xclk *xclk = &isp->xclks[i];
xclk->isp = isp;
xclk->id = i == 0 ? ISP_XCLK_A : ISP_XCLK_B;
xclk->divider = 1;
spin_lock_init(&xclk->lock);
init.name = i == 0 ? "cam_xclka" : "cam_xclkb";
init.ops = &isp_xclk_ops;
init.parent_names = &isp_xclk_parent_name;
init.num_parents = 1;
xclk->hw.init = &init;
/*
* The first argument is NULL in order to avoid circular
* reference, as this driver takes reference on the
* sensor subdevice modules and the sensors would take
* reference on this module through clk_get().
*/
xclk->clk = clk_register(NULL, &xclk->hw);
if (IS_ERR(xclk->clk))
return PTR_ERR(xclk->clk);
}
if (np)
of_clk_add_provider(np, isp_xclk_src_get, isp);
return 0;
}
static void isp_xclk_cleanup(struct isp_device *isp)
{
struct device_node *np = isp->dev->of_node;
unsigned int i;
if (np)
of_clk_del_provider(np);
for (i = 0; i < ARRAY_SIZE(isp->xclks); ++i) {
struct isp_xclk *xclk = &isp->xclks[i];
if (!IS_ERR(xclk->clk))
clk_unregister(xclk->clk);
}
}
/* -----------------------------------------------------------------------------
* Interrupts
*/
/*
* 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_core_init - ISP core settings
* @isp: OMAP3 ISP device
* @idle: Consider idle state.
*
* Set the power settings for the ISP and SBL bus and configure the HS/VS
* interrupt source.
*
* We need to configure the HS/VS interrupt source before interrupts get
* enabled, as the sensor might be free-running and the ISP default setting
* (HS edge) would put an unnecessary burden on the CPU.
*/
static void isp_core_init(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);
isp_reg_writel(isp,
(isp->autoidle ? ISPCTRL_SBL_AUTOIDLE : 0) |
ISPCTRL_SYNC_DETECT_VSRISE,
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_cfg *parcfg,
unsigned int shift, unsigned int bridge)
{
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;
ispctrl_val |= bridge;
switch (input) {
case CCDC_INPUT_PARALLEL:
ispctrl_val |= ISPCTRL_PAR_SER_CLK_SEL_PARALLEL;
ispctrl_val |= parcfg->clk_pol << ISPCTRL_PAR_CLK_POL_SHIFT;
shift += parcfg->data_lane_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 |= ((shift/2) << ISPCTRL_SHIFT_SHIFT) & ISPCTRL_SHIFT_MASK;
isp_reg_writel(isp, ispctrl_val, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL);
}
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, "ISP IRQ: ");
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;
struct isp_pipeline *pipe;
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_CSIB_WBL_OVF) {
pipe = to_isp_pipeline(&isp->isp_ccp2.subdev.entity);
if (pipe != NULL)
pipe->error = true;
}
if (sbl_pcr & ISPSBL_PCR_CSIA_WBL_OVF) {
pipe = to_isp_pipeline(&isp->isp_csi2a.subdev.entity);
if (pipe != NULL)
pipe->error = true;
}
if (sbl_pcr & ISPSBL_PCR_CCDC_WBL_OVF) {
pipe = to_isp_pipeline(&isp->isp_ccdc.subdev.entity);
if (pipe != NULL)
pipe->error = true;
}
if (sbl_pcr & ISPSBL_PCR_PRV_WBL_OVF) {
pipe = to_isp_pipeline(&isp->isp_prev.subdev.entity);
if (pipe != NULL)
pipe->error = true;
}
if (sbl_pcr & (ISPSBL_PCR_RSZ1_WBL_OVF
| ISPSBL_PCR_RSZ2_WBL_OVF
| ISPSBL_PCR_RSZ3_WBL_OVF
| ISPSBL_PCR_RSZ4_WBL_OVF)) {
pipe = to_isp_pipeline(&isp->isp_res.subdev.entity);
if (pipe != NULL)
pipe->error = true;
}
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.
*/
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;
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)
omap3isp_csi2_isr(&isp->isp_csi2a);
if (irqstatus & IRQ0STATUS_CSIB_IRQ)
omap3isp_ccp2_isr(&isp->isp_ccp2);
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;
}
static const struct media_device_ops isp_media_ops = {
.link_notify = v4l2_pipeline_link_notify,
};
/* -----------------------------------------------------------------------------
* 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;
/* Refuse to start streaming if an entity included in the pipeline has
* crashed. This check must be performed before the loop below to avoid
* starting entities if the pipeline won't start anyway (those entities
* would then likely fail to stop, making the problem worse).
*/
if (media_entity_enum_intersects(&pipe->ent_enum, &isp->crashed))
return -EIO;
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_pad(pad);
if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
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)
return ret;
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;
}
}
return 0;
}
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_pad(pad);
if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
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);
}
ret = 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);
/* Handle stop failures. An entity that fails to stop can
* usually just be restarted. Flag the stop failure nonetheless
* to trigger an ISP reset the next time the device is released,
* just in case.
*
* The preview engine is a special case. A failure to stop can
* mean a hardware crash. When that happens the preview engine
* won't respond to read/write operations on the L4 bus anymore,
* resulting in a bus fault and a kernel oops next time it gets
* accessed. Mark it as crashed to prevent pipelines including
* it from being started.
*/
if (ret) {
dev_info(isp->dev, "Unable to stop %s\n", subdev->name);
isp->stop_failure = true;
if (subdev == &isp->isp_prev.subdev)
media_entity_enum_set(&isp->crashed,
&subdev->entity);
failure = -ETIMEDOUT;
}
}
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;
}
/*
* omap3isp_pipeline_cancel_stream - Cancel stream on a pipeline
* @pipe: ISP pipeline
*
* Cancelling a stream mark all buffers on all video nodes in the pipeline as
* erroneous and makes sure no new buffer can be queued. This function is called
* when a fatal error that prevents any further operation on the pipeline
* occurs.
*/
void omap3isp_pipeline_cancel_stream(struct isp_pipeline *pipe)
{
if (pipe->input)
omap3isp_video_cancel_stream(pipe->input);
if (pipe->output)
omap3isp_video_cancel_stream(pipe->output);
}
/*
* 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_pad(&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 __maybe_unused 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 __maybe_unused 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);
}
isp->stop_failure = false;
media_entity_enum_zero(&isp->crashed);
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);
omap_iommu_save_ctx(isp->dev);
}
/*
* 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);
omap_iommu_restore_ctx(isp->dev);
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->irqlock, flags);
if (video->dmaqueue_flags & ISP_VIDEO_DMAQUEUE_UNDERRUN) {
spin_unlock_irqrestore(&video->irqlock, flags);
atomic_set(stopping, 0);
smp_mb();
return 0;
}
spin_unlock_irqrestore(&video->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_stopping - 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;
/* AEWB and AF share the same clock. */
if (isp->subclk_resources &
(OMAP3_ISP_SUBCLK_AEWB | OMAP3_ISP_SUBCLK_AF))
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 as well.
*/
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_prepare_enable return value if any of them
* fails.
*/
static int isp_enable_clocks(struct isp_device *isp)
{
int r;
unsigned long rate;
r = clk_prepare_enable(isp->clock[ISP_CLK_CAM_ICK]);
if (r) {
dev_err(isp->dev, "failed to enable cam_ick clock\n");
goto out_clk_enable_ick;
}
r = clk_set_rate(isp->clock[ISP_CLK_CAM_MCLK], CM_CAM_MCLK_HZ);
if (r) {
dev_err(isp->dev, "clk_set_rate for cam_mclk failed\n");
goto out_clk_enable_mclk;
}
r = clk_prepare_enable(isp->clock[ISP_CLK_CAM_MCLK]);
if (r) {
dev_err(isp->dev, "failed to enable cam_mclk clock\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_prepare_enable(isp->clock[ISP_CLK_CSI2_FCK]);
if (r) {
dev_err(isp->dev, "failed to enable csi2_fck clock\n");
goto out_clk_enable_csi2_fclk;
}
return 0;
out_clk_enable_csi2_fclk:
clk_disable_unprepare(isp->clock[ISP_CLK_CAM_MCLK]);
out_clk_enable_mclk:
clk_disable_unprepare(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_unprepare(isp->clock[ISP_CLK_CAM_ICK]);
clk_disable_unprepare(isp->clock[ISP_CLK_CAM_MCLK]);
clk_disable_unprepare(isp->clock[ISP_CLK_CSI2_FCK]);
}
static const char *isp_clocks[] = {
"cam_ick",
"cam_mclk",
"csi2_96m_fck",
"l3_ick",
};
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 = devm_clk_get(isp->dev, isp_clocks[i]);
if (IS_ERR(clk)) {
dev_err(isp->dev, "clk_get %s failed\n", isp_clocks[i]);
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 occurred.
*/
static struct isp_device *__omap3isp_get(struct isp_device *isp, bool irq)
{
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);
if (irq)
isp_enable_interrupts(isp);
out:
if (__isp != NULL)
isp->ref_count++;
mutex_unlock(&isp->isp_mutex);
return __isp;
}
struct isp_device *omap3isp_get(struct isp_device *isp)
{
return __omap3isp_get(isp, true);
}
/*
* 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.
*/
static void __omap3isp_put(struct isp_device *isp, bool save_ctx)
{
if (isp == NULL)
return;
mutex_lock(&isp->isp_mutex);
BUG_ON(isp->ref_count == 0);
if (--isp->ref_count == 0) {
isp_disable_interrupts(isp);
if (save_ctx) {
isp_save_ctx(isp);
isp->has_context = 1;
}
/* Reset the ISP if an entity has failed to stop. This is the
* only way to recover from such conditions.
*/
if (!media_entity_enum_empty(&isp->crashed) ||
isp->stop_failure)
isp_reset(isp);
isp_disable_clocks(isp);
}
mutex_unlock(&isp->isp_mutex);
}
void omap3isp_put(struct isp_device *isp)
{
__omap3isp_put(isp, true);
}
/* --------------------------------------------------------------------------
* 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 modelled 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);
media_device_cleanup(&isp->media_dev);
}
static int isp_link_entity(
struct isp_device *isp, struct media_entity *entity,
enum isp_interface_type interface)
{
struct media_entity *input;
unsigned int flags;
unsigned int pad;
unsigned int i;
/* 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 (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:
dev_err(isp->dev, "%s: invalid interface type %u\n", __func__,
interface);
return -EINVAL;
}
/*
* Not all interfaces are available on all revisions of the
* ISP. The sub-devices of those interfaces aren't initialised
* in such a case. Check this by ensuring the num_pads is
* non-zero.
*/
if (!input->num_pads) {
dev_err(isp->dev, "%s: invalid input %u\n", entity->name,
interface);
return -EINVAL;
}
for (i = 0; i < entity->num_pads; i++) {
if (entity->pads[i].flags & MEDIA_PAD_FL_SOURCE)
break;
}
if (i == entity->num_pads) {
dev_err(isp->dev, "%s: no source pad in external entity %s\n",
__func__, entity->name);
return -EINVAL;
}
return media_create_pad_link(entity, i, input, pad, flags);
}
static int isp_register_entities(struct isp_device *isp)
{
int ret;
isp->media_dev.dev = isp->dev;
strlcpy(isp->media_dev.model, "TI OMAP3 ISP",
sizeof(isp->media_dev.model));
isp->media_dev.hw_revision = isp->revision;
isp->media_dev.ops = &isp_media_ops;
media_device_init(&isp->media_dev);
isp->v4l2_dev.mdev = &isp->media_dev;
ret = v4l2_device_register(isp->dev, &isp->v4l2_dev);
if (ret < 0) {
dev_err(isp->dev, "%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;
done:
if (ret < 0)
isp_unregister_entities(isp);
return ret;
}
/*
* isp_create_links() - Create links for internal and external ISP entities
* @isp : Pointer to ISP device
*
* This function creates all links between ISP internal and external entities.
*
* Return: A negative error code on failure or zero on success. Possible error
* codes are those returned by media_create_pad_link().
*/
static int isp_create_links(struct isp_device *isp)
{
int ret;
/* Create links between entities and video nodes. */
ret = media_create_pad_link(
&isp->isp_csi2a.subdev.entity, CSI2_PAD_SOURCE,
&isp->isp_csi2a.video_out.video.entity, 0, 0);
if (ret < 0)
return ret;
ret = media_create_pad_link(
&isp->isp_ccp2.video_in.video.entity, 0,
&isp->isp_ccp2.subdev.entity, CCP2_PAD_SINK, 0);
if (ret < 0)
return ret;
ret = media_create_pad_link(
&isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_OF,
&isp->isp_ccdc.video_out.video.entity, 0, 0);
if (ret < 0)
return ret;
ret = media_create_pad_link(
&isp->isp_prev.video_in.video.entity, 0,
&isp->isp_prev.subdev.entity, PREV_PAD_SINK, 0);
if (ret < 0)
return ret;
ret = media_create_pad_link(
&isp->isp_prev.subdev.entity, PREV_PAD_SOURCE,
&isp->isp_prev.video_out.video.entity, 0, 0);
if (ret < 0)
return ret;
ret = media_create_pad_link(
&isp->isp_res.video_in.video.entity, 0,
&isp->isp_res.subdev.entity, RESZ_PAD_SINK, 0);
if (ret < 0)
return ret;
ret = media_create_pad_link(
&isp->isp_res.subdev.entity, RESZ_PAD_SOURCE,
&isp->isp_res.video_out.video.entity, 0, 0);
if (ret < 0)
return ret;
/* Create links between entities. */
ret = media_create_pad_link(
&isp->isp_csi2a.subdev.entity, CSI2_PAD_SOURCE,
&isp->isp_ccdc.subdev.entity, CCDC_PAD_SINK, 0);
if (ret < 0)
return ret;
ret = media_create_pad_link(
&isp->isp_ccp2.subdev.entity, CCP2_PAD_SOURCE,
&isp->isp_ccdc.subdev.entity, CCDC_PAD_SINK, 0);
if (ret < 0)
return ret;
ret = media_create_pad_link(
&isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_VP,
&isp->isp_prev.subdev.entity, PREV_PAD_SINK, 0);
if (ret < 0)
return ret;
ret = media_create_pad_link(
&isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_OF,
&isp->isp_res.subdev.entity, RESZ_PAD_SINK, 0);
if (ret < 0)
return ret;
ret = media_create_pad_link(
&isp->isp_prev.subdev.entity, PREV_PAD_SOURCE,
&isp->isp_res.subdev.entity, RESZ_PAD_SINK, 0);
if (ret < 0)
return ret;
ret = media_create_pad_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)
return ret;
ret = media_create_pad_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)
return ret;
ret = media_create_pad_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)
return ret;
return 0;
}
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);
omap3isp_csiphy_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");
return ret;
}
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) {
if (ret != -EPROBE_DEFER)
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;
}
return 0;
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:
omap3isp_csiphy_cleanup(isp);
return ret;
}
static void isp_detach_iommu(struct isp_device *isp)
{
#ifdef CONFIG_ARM_DMA_USE_IOMMU
arm_iommu_detach_device(isp->dev);
arm_iommu_release_mapping(isp->mapping);
isp->mapping = NULL;
#endif
}
static int isp_attach_iommu(struct isp_device *isp)
{
#ifdef CONFIG_ARM_DMA_USE_IOMMU
struct dma_iommu_mapping *mapping;
int ret;
/*
* Create the ARM mapping, used by the ARM DMA mapping core to allocate
* VAs. This will allocate a corresponding IOMMU domain.
*/
mapping = arm_iommu_create_mapping(&platform_bus_type, SZ_1G, SZ_2G);
if (IS_ERR(mapping)) {
dev_err(isp->dev, "failed to create ARM IOMMU mapping\n");
return PTR_ERR(mapping);
}
isp->mapping = mapping;
/* Attach the ARM VA mapping to the device. */
ret = arm_iommu_attach_device(isp->dev, mapping);
if (ret < 0) {
dev_err(isp->dev, "failed to attach device to VA mapping\n");
goto error;
}
return 0;
error:
arm_iommu_release_mapping(isp->mapping);
isp->mapping = NULL;
return ret;
#else
return -ENODEV;
#endif
}
/*
* 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);
v4l2_async_notifier_unregister(&isp->notifier);
isp_unregister_entities(isp);
isp_cleanup_modules(isp);
isp_xclk_cleanup(isp);
__omap3isp_get(isp, false);
isp_detach_iommu(isp);
__omap3isp_put(isp, false);
media_entity_enum_cleanup(&isp->crashed);
v4l2_async_notifier_cleanup(&isp->notifier);
return 0;
}
enum isp_of_phy {
ISP_OF_PHY_PARALLEL = 0,
ISP_OF_PHY_CSIPHY1,
ISP_OF_PHY_CSIPHY2,
};
static int isp_fwnode_parse(struct device *dev,
struct v4l2_fwnode_endpoint *vep,
struct v4l2_async_subdev *asd)
{
struct isp_async_subdev *isd =
container_of(asd, struct isp_async_subdev, asd);
struct isp_bus_cfg *buscfg = &isd->bus;
bool csi1 = false;
unsigned int i;
dev_dbg(dev, "parsing endpoint %pOF, interface %u\n",
to_of_node(vep->base.local_fwnode), vep->base.port);
switch (vep->base.port) {
case ISP_OF_PHY_PARALLEL:
buscfg->interface = ISP_INTERFACE_PARALLEL;
buscfg->bus.parallel.data_lane_shift =
vep->bus.parallel.data_shift;
buscfg->bus.parallel.clk_pol =
!!(vep->bus.parallel.flags
& V4L2_MBUS_PCLK_SAMPLE_FALLING);
buscfg->bus.parallel.hs_pol =
!!(vep->bus.parallel.flags & V4L2_MBUS_VSYNC_ACTIVE_LOW);
buscfg->bus.parallel.vs_pol =
!!(vep->bus.parallel.flags & V4L2_MBUS_HSYNC_ACTIVE_LOW);
buscfg->bus.parallel.fld_pol =
!!(vep->bus.parallel.flags & V4L2_MBUS_FIELD_EVEN_LOW);
buscfg->bus.parallel.data_pol =
!!(vep->bus.parallel.flags & V4L2_MBUS_DATA_ACTIVE_LOW);
buscfg->bus.parallel.bt656 = vep->bus_type == V4L2_MBUS_BT656;
break;
case ISP_OF_PHY_CSIPHY1:
case ISP_OF_PHY_CSIPHY2:
switch (vep->bus_type) {
case V4L2_MBUS_CCP2:
case V4L2_MBUS_CSI1:
dev_dbg(dev, "CSI-1/CCP-2 configuration\n");
csi1 = true;
break;
case V4L2_MBUS_CSI2:
dev_dbg(dev, "CSI-2 configuration\n");
csi1 = false;
break;
default:
dev_err(dev, "unsupported bus type %u\n",
vep->bus_type);
return -EINVAL;
}
switch (vep->base.port) {
case ISP_OF_PHY_CSIPHY1:
if (csi1)
buscfg->interface = ISP_INTERFACE_CCP2B_PHY1;
else
buscfg->interface = ISP_INTERFACE_CSI2C_PHY1;
break;
case ISP_OF_PHY_CSIPHY2:
if (csi1)
buscfg->interface = ISP_INTERFACE_CCP2B_PHY2;
else
buscfg->interface = ISP_INTERFACE_CSI2A_PHY2;
break;
}
if (csi1) {
buscfg->bus.ccp2.lanecfg.clk.pos =
vep->bus.mipi_csi1.clock_lane;
buscfg->bus.ccp2.lanecfg.clk.pol =
vep->bus.mipi_csi1.lane_polarity[0];
dev_dbg(dev, "clock lane polarity %u, pos %u\n",
buscfg->bus.ccp2.lanecfg.clk.pol,
buscfg->bus.ccp2.lanecfg.clk.pos);
buscfg->bus.ccp2.lanecfg.data[0].pos =
vep->bus.mipi_csi1.data_lane;
buscfg->bus.ccp2.lanecfg.data[0].pol =
vep->bus.mipi_csi1.lane_polarity[1];
dev_dbg(dev, "data lane polarity %u, pos %u\n",
buscfg->bus.ccp2.lanecfg.data[0].pol,
buscfg->bus.ccp2.lanecfg.data[0].pos);
buscfg->bus.ccp2.strobe_clk_pol =
vep->bus.mipi_csi1.clock_inv;
buscfg->bus.ccp2.phy_layer = vep->bus.mipi_csi1.strobe;
buscfg->bus.ccp2.ccp2_mode =
vep->bus_type == V4L2_MBUS_CCP2;
buscfg->bus.ccp2.vp_clk_pol = 1;
buscfg->bus.ccp2.crc = 1;
} else {
buscfg->bus.csi2.lanecfg.clk.pos =
vep->bus.mipi_csi2.clock_lane;
buscfg->bus.csi2.lanecfg.clk.pol =
vep->bus.mipi_csi2.lane_polarities[0];
dev_dbg(dev, "clock lane polarity %u, pos %u\n",
buscfg->bus.csi2.lanecfg.clk.pol,
buscfg->bus.csi2.lanecfg.clk.pos);
buscfg->bus.csi2.num_data_lanes =
vep->bus.mipi_csi2.num_data_lanes;
for (i = 0; i < buscfg->bus.csi2.num_data_lanes; i++) {
buscfg->bus.csi2.lanecfg.data[i].pos =
vep->bus.mipi_csi2.data_lanes[i];
buscfg->bus.csi2.lanecfg.data[i].pol =
vep->bus.mipi_csi2.lane_polarities[i + 1];
dev_dbg(dev,
"data lane %u polarity %u, pos %u\n", i,
buscfg->bus.csi2.lanecfg.data[i].pol,
buscfg->bus.csi2.lanecfg.data[i].pos);
}
/*
* FIXME: now we assume the CRC is always there.
* Implement a way to obtain this information from the
* sensor. Frame descriptors, perhaps?
*/
buscfg->bus.csi2.crc = 1;
}
break;
default:
dev_warn(dev, "%pOF: invalid interface %u\n",
to_of_node(vep->base.local_fwnode), vep->base.port);
return -EINVAL;
}
return 0;
}
static int isp_subdev_notifier_complete(struct v4l2_async_notifier *async)
{
struct isp_device *isp = container_of(async, struct isp_device,
notifier);
struct v4l2_device *v4l2_dev = &isp->v4l2_dev;
struct v4l2_subdev *sd;
int ret;
ret = media_entity_enum_init(&isp->crashed, &isp->media_dev);
if (ret)
return ret;
list_for_each_entry(sd, &v4l2_dev->subdevs, list) {
if (sd->notifier != &isp->notifier)
continue;
ret = isp_link_entity(isp, &sd->entity,
v4l2_subdev_to_bus_cfg(sd)->interface);
if (ret < 0)
return ret;
}
ret = v4l2_device_register_subdev_nodes(&isp->v4l2_dev);
if (ret < 0)
return ret;
return media_device_register(&isp->media_dev);
}
static const struct v4l2_async_notifier_operations isp_subdev_notifier_ops = {
.complete = isp_subdev_notifier_complete,
};
/*
* 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_device *isp;
struct resource *mem;
int ret;
int i, m;
isp = devm_kzalloc(&pdev->dev, sizeof(*isp), GFP_KERNEL);
if (!isp) {
dev_err(&pdev->dev, "could not allocate memory\n");
return -ENOMEM;
}
ret = fwnode_property_read_u32(of_fwnode_handle(pdev->dev.of_node),
"ti,phy-type", &isp->phy_type);
if (ret)
return ret;
isp->syscon = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
"syscon");
if (IS_ERR(isp->syscon))
return PTR_ERR(isp->syscon);
ret = of_property_read_u32_index(pdev->dev.of_node,
"syscon", 1, &isp->syscon_offset);
if (ret)
return ret;
isp->autoidle = autoidle;
mutex_init(&isp->isp_mutex);
spin_lock_init(&isp->stat_lock);
ret = v4l2_async_notifier_parse_fwnode_endpoints(
&pdev->dev, &isp->notifier, sizeof(struct isp_async_subdev),
isp_fwnode_parse);
if (ret < 0)
goto error;
isp->dev = &pdev->dev;
isp->ref_count = 0;
ret = dma_coerce_mask_and_coherent(isp->dev, DMA_BIT_MASK(32));
if (ret)
goto error;
platform_set_drvdata(pdev, isp);
/* Regulators */
isp->isp_csiphy1.vdd = devm_regulator_get(&pdev->dev, "vdd-csiphy1");
isp->isp_csiphy2.vdd = devm_regulator_get(&pdev->dev, "vdd-csiphy2");
/* Clocks
*
* The ISP clock tree is revision-dependent. We thus need to enable ICLK
* manually to read the revision before calling __omap3isp_get().
*
* Start by mapping the ISP MMIO area, which is in two pieces.
* The ISP IOMMU is in between. Map both now, and fill in the
* ISP revision specific portions a little later in the
* function.
*/
for (i = 0; i < 2; i++) {
unsigned int map_idx = i ? OMAP3_ISP_IOMEM_CSI2A_REGS1 : 0;
mem = platform_get_resource(pdev, IORESOURCE_MEM, i);
isp->mmio_base[map_idx] =
devm_ioremap_resource(isp->dev, mem);
if (IS_ERR(isp->mmio_base[map_idx]))
return PTR_ERR(isp->mmio_base[map_idx]);
}
ret = isp_get_clocks(isp);
if (ret < 0)
goto error;
ret = clk_enable(isp->clock[ISP_CLK_CAM_ICK]);
if (ret < 0)
goto error;
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);
clk_disable(isp->clock[ISP_CLK_CAM_ICK]);
if (__omap3isp_get(isp, false) == NULL) {
ret = -ENODEV;
goto error;
}
ret = isp_reset(isp);
if (ret < 0)
goto error_isp;
ret = isp_xclk_init(isp);
if (ret < 0)
goto error_isp;
/* Memory resources */
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_CSI2A_REGS1; i++)
isp->mmio_base[i] =
isp->mmio_base[0] + isp_res_maps[m].offset[i];
for (i = OMAP3_ISP_IOMEM_CSIPHY2; i < OMAP3_ISP_IOMEM_LAST; i++)
isp->mmio_base[i] =
isp->mmio_base[OMAP3_ISP_IOMEM_CSI2A_REGS1]
+ isp_res_maps[m].offset[i];
isp->mmio_hist_base_phys =
mem->start + isp_res_maps[m].offset[OMAP3_ISP_IOMEM_HIST];
/* IOMMU */
ret = isp_attach_iommu(isp);
if (ret < 0) {
dev_err(&pdev->dev, "unable to attach to IOMMU\n");
goto error_isp;
}
/* Interrupt */
ret = platform_get_irq(pdev, 0);
if (ret <= 0) {
dev_err(isp->dev, "No IRQ resource\n");
ret = -ENODEV;
goto error_iommu;
}
isp->irq_num = ret;
if (devm_request_irq(isp->dev, isp->irq_num, isp_isr, IRQF_SHARED,
"OMAP3 ISP", isp)) {
dev_err(isp->dev, "Unable to request IRQ\n");
ret = -EINVAL;
goto error_iommu;
}
/* Entities */
ret = isp_initialize_modules(isp);
if (ret < 0)
goto error_iommu;
ret = isp_register_entities(isp);
if (ret < 0)
goto error_modules;
ret = isp_create_links(isp);
if (ret < 0)
goto error_register_entities;
isp->notifier.ops = &isp_subdev_notifier_ops;
ret = v4l2_async_notifier_register(&isp->v4l2_dev, &isp->notifier);
if (ret)
goto error_register_entities;
isp_core_init(isp, 1);
omap3isp_put(isp);
return 0;
error_register_entities:
isp_unregister_entities(isp);
error_modules:
isp_cleanup_modules(isp);
error_iommu:
isp_detach_iommu(isp);
error_isp:
isp_xclk_cleanup(isp);
__omap3isp_put(isp, false);
error:
v4l2_async_notifier_cleanup(&isp->notifier);
mutex_destroy(&isp->isp_mutex);
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 const struct of_device_id omap3isp_of_table[] = {
{ .compatible = "ti,omap3-isp" },
{ },
};
MODULE_DEVICE_TABLE(of, omap3isp_of_table);
static struct platform_driver omap3isp_driver = {
.probe = isp_probe,
.remove = isp_remove,
.id_table = omap3isp_id_table,
.driver = {
.name = "omap3isp",
.pm = &omap3isp_pm_ops,
.of_match_table = omap3isp_of_table,
},
};
module_platform_driver(omap3isp_driver);
MODULE_AUTHOR("Nokia Corporation");
MODULE_DESCRIPTION("TI OMAP3 ISP driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(ISP_VIDEO_DRIVER_VERSION);
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