summaryrefslogtreecommitdiffstats
path: root/drivers/media/video/omap3isp/isp.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/video/omap3isp/isp.c')
-rw-r--r--drivers/media/video/omap3isp/isp.c2220
1 files changed, 2220 insertions, 0 deletions
diff --git a/drivers/media/video/omap3isp/isp.c b/drivers/media/video/omap3isp/isp.c
new file mode 100644
index 00000000000..1a9963bd6d4
--- /dev/null
+++ b/drivers/media/video/omap3isp/isp.c
@@ -0,0 +1,2220 @@
+/*
+ * 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 0:
+ isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_MAIN, ISP_TCTRL_CTRL,
+ ISPTCTRL_CTRL_DIVA_MASK,
+ divisor << ISPTCTRL_CTRL_DIVA_SHIFT);
+ dev_dbg(isp->dev, "isp_set_xclk(): cam_xclka set to %d Hz\n",
+ currentxclk);
+ break;
+ case 1:
+ isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_MAIN, ISP_TCTRL_CTRL,
+ ISPTCTRL_CTRL_DIVB_MASK,
+ divisor << ISPTCTRL_CTRL_DIVB_SHIFT);
+ dev_dbg(isp->dev, "isp_set_xclk(): cam_xclkb set to %d Hz\n",
+ currentxclk);
+ break;
+ default:
+ 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] < 2)
+ omap3isp_get(isp);
+ /* Stopping the clock. */
+ else if (divisor < 2 && isp->xclk_divisor[xclksel] >= 2)
+ omap3isp_put(isp);
+
+ isp->xclk_divisor[xclksel] = 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)
+{
+ u32 ispctrl_val;
+
+ ispctrl_val = isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL);
+ ispctrl_val &= ~ISPCTRL_SHIFT_MASK;
+ ispctrl_val &= ~ISPCTRL_PAR_CLK_POL_INV;
+ ispctrl_val &= ~ISPCTRL_PAR_SER_CLK_SEL_MASK;
+ ispctrl_val &= ~ISPCTRL_PAR_BRIDGE_MASK;
+
+ switch (input) {
+ case CCDC_INPUT_PARALLEL:
+ ispctrl_val |= ISPCTRL_PAR_SER_CLK_SEL_PARALLEL;
+ ispctrl_val |= pdata->data_lane_shift << ISPCTRL_SHIFT_SHIFT;
+ ispctrl_val |= pdata->clk_pol << ISPCTRL_PAR_CLK_POL_SHIFT;
+ ispctrl_val |= pdata->bridge << ISPCTRL_PAR_BRIDGE_SHIFT;
+ break;
+
+ case CCDC_INPUT_CSI2A:
+ ispctrl_val |= ISPCTRL_PAR_SER_CLK_SEL_CSIA;
+ break;
+
+ case CCDC_INPUT_CCP2B:
+ ispctrl_val |= ISPCTRL_PAR_SER_CLK_SEL_CSIB;
+ break;
+
+ case CCDC_INPUT_CSI2C:
+ ispctrl_val |= ISPCTRL_PAR_SER_CLK_SEL_CSIC;
+ break;
+
+ default:
+ return;
+ }
+
+ ispctrl_val &= ~ISPCTRL_SYNC_DETECT_MASK;
+ ispctrl_val |= ISPCTRL_SYNC_DETECT_VSRISE;
+
+ isp_reg_writel(isp, ispctrl_val, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL);
+}
+
+/**
+ * isp_set_pixel_clock - Configures the ISP pixel clock
+ * @isp: OMAP3 ISP device
+ * @pixelclk: Average pixel clock in Hz
+ *
+ * Set the average pixel clock required by the sensor. The ISP will use the
+ * lowest possible memory bandwidth settings compatible with the clock.
+ **/
+static void isp_set_pixel_clock(struct isp_device *isp, unsigned int pixelclk)
+{
+ isp->isp_ccdc.vpcfg.pixelclk = pixelclk;
+}
+
+void 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);
+
+ 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 successfull, or the return value of the failed video::s_stream
+ * operation otherwise.
+ */
+static int isp_pipeline_enable(struct isp_pipeline *pipe,
+ enum isp_pipeline_stream_state mode)
+{
+ struct isp_device *isp = pipe->output->isp;
+ struct media_entity *entity;
+ struct media_pad *pad;
+ struct v4l2_subdev *subdev;
+ unsigned long flags;
+ int ret = 0;
+
+ spin_lock_irqsave(&pipe->lock, flags);
+ pipe->state &= ~(ISP_PIPELINE_IDLE_INPUT | ISP_PIPELINE_IDLE_OUTPUT);
+ spin_unlock_irqrestore(&pipe->lock, flags);
+
+ pipe->do_propagation = false;
+
+ entity = &pipe->output->video.entity;
+ while (1) {
+ pad = &entity->pads[0];
+ if (!(pad->flags & MEDIA_PAD_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;
+ }
+ }
+
+ 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 successfull, or the return value of the failed video::s_stream
+ * operation otherwise.
+ */
+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);
+ 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);
+ 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");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-25 15:13:31 +0000