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path: root/drivers/media/platform/omap3isp/ispcsi2.c
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Diffstat (limited to 'drivers/media/platform/omap3isp/ispcsi2.c')
-rw-r--r--drivers/media/platform/omap3isp/ispcsi2.c1328
1 files changed, 1328 insertions, 0 deletions
diff --git a/drivers/media/platform/omap3isp/ispcsi2.c b/drivers/media/platform/omap3isp/ispcsi2.c
new file mode 100644
index 000000000000..6a3ff792af7d
--- /dev/null
+++ b/drivers/media/platform/omap3isp/ispcsi2.c
@@ -0,0 +1,1328 @@
+/*
+ * ispcsi2.c
+ *
+ * TI OMAP3 ISP - CSI2 module
+ *
+ * Copyright (C) 2010 Nokia Corporation
+ * Copyright (C) 2009 Texas Instruments, Inc.
+ *
+ * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ * Sakari Ailus <sakari.ailus@iki.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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 <linux/delay.h>
+#include <media/v4l2-common.h>
+#include <linux/v4l2-mediabus.h>
+#include <linux/mm.h>
+
+#include "isp.h"
+#include "ispreg.h"
+#include "ispcsi2.h"
+
+/*
+ * csi2_if_enable - Enable CSI2 Receiver interface.
+ * @enable: enable flag
+ *
+ */
+static void csi2_if_enable(struct isp_device *isp,
+ struct isp_csi2_device *csi2, u8 enable)
+{
+ struct isp_csi2_ctrl_cfg *currctrl = &csi2->ctrl;
+
+ isp_reg_clr_set(isp, csi2->regs1, ISPCSI2_CTRL, ISPCSI2_CTRL_IF_EN,
+ enable ? ISPCSI2_CTRL_IF_EN : 0);
+
+ currctrl->if_enable = enable;
+}
+
+/*
+ * csi2_recv_config - CSI2 receiver module configuration.
+ * @currctrl: isp_csi2_ctrl_cfg structure
+ *
+ */
+static void csi2_recv_config(struct isp_device *isp,
+ struct isp_csi2_device *csi2,
+ struct isp_csi2_ctrl_cfg *currctrl)
+{
+ u32 reg;
+
+ reg = isp_reg_readl(isp, csi2->regs1, ISPCSI2_CTRL);
+
+ if (currctrl->frame_mode)
+ reg |= ISPCSI2_CTRL_FRAME;
+ else
+ reg &= ~ISPCSI2_CTRL_FRAME;
+
+ if (currctrl->vp_clk_enable)
+ reg |= ISPCSI2_CTRL_VP_CLK_EN;
+ else
+ reg &= ~ISPCSI2_CTRL_VP_CLK_EN;
+
+ if (currctrl->vp_only_enable)
+ reg |= ISPCSI2_CTRL_VP_ONLY_EN;
+ else
+ reg &= ~ISPCSI2_CTRL_VP_ONLY_EN;
+
+ reg &= ~ISPCSI2_CTRL_VP_OUT_CTRL_MASK;
+ reg |= currctrl->vp_out_ctrl << ISPCSI2_CTRL_VP_OUT_CTRL_SHIFT;
+
+ if (currctrl->ecc_enable)
+ reg |= ISPCSI2_CTRL_ECC_EN;
+ else
+ reg &= ~ISPCSI2_CTRL_ECC_EN;
+
+ isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_CTRL);
+}
+
+static const unsigned int csi2_input_fmts[] = {
+ V4L2_MBUS_FMT_SGRBG10_1X10,
+ V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8,
+ V4L2_MBUS_FMT_SRGGB10_1X10,
+ V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8,
+ V4L2_MBUS_FMT_SBGGR10_1X10,
+ V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8,
+ V4L2_MBUS_FMT_SGBRG10_1X10,
+ V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8,
+ V4L2_MBUS_FMT_YUYV8_2X8,
+};
+
+/* To set the format on the CSI2 requires a mapping function that takes
+ * the following inputs:
+ * - 3 different formats (at this time)
+ * - 2 destinations (mem, vp+mem) (vp only handled separately)
+ * - 2 decompression options (on, off)
+ * - 2 isp revisions (certain format must be handled differently on OMAP3630)
+ * Output should be CSI2 frame format code
+ * Array indices as follows: [format][dest][decompr][is_3630]
+ * Not all combinations are valid. 0 means invalid.
+ */
+static const u16 __csi2_fmt_map[3][2][2][2] = {
+ /* RAW10 formats */
+ {
+ /* Output to memory */
+ {
+ /* No DPCM decompression */
+ { CSI2_PIX_FMT_RAW10_EXP16, CSI2_PIX_FMT_RAW10_EXP16 },
+ /* DPCM decompression */
+ { 0, 0 },
+ },
+ /* Output to both */
+ {
+ /* No DPCM decompression */
+ { CSI2_PIX_FMT_RAW10_EXP16_VP,
+ CSI2_PIX_FMT_RAW10_EXP16_VP },
+ /* DPCM decompression */
+ { 0, 0 },
+ },
+ },
+ /* RAW10 DPCM8 formats */
+ {
+ /* Output to memory */
+ {
+ /* No DPCM decompression */
+ { CSI2_PIX_FMT_RAW8, CSI2_USERDEF_8BIT_DATA1 },
+ /* DPCM decompression */
+ { CSI2_PIX_FMT_RAW8_DPCM10_EXP16,
+ CSI2_USERDEF_8BIT_DATA1_DPCM10 },
+ },
+ /* Output to both */
+ {
+ /* No DPCM decompression */
+ { CSI2_PIX_FMT_RAW8_VP,
+ CSI2_PIX_FMT_RAW8_VP },
+ /* DPCM decompression */
+ { CSI2_PIX_FMT_RAW8_DPCM10_VP,
+ CSI2_USERDEF_8BIT_DATA1_DPCM10_VP },
+ },
+ },
+ /* YUYV8 2X8 formats */
+ {
+ /* Output to memory */
+ {
+ /* No DPCM decompression */
+ { CSI2_PIX_FMT_YUV422_8BIT,
+ CSI2_PIX_FMT_YUV422_8BIT },
+ /* DPCM decompression */
+ { 0, 0 },
+ },
+ /* Output to both */
+ {
+ /* No DPCM decompression */
+ { CSI2_PIX_FMT_YUV422_8BIT_VP,
+ CSI2_PIX_FMT_YUV422_8BIT_VP },
+ /* DPCM decompression */
+ { 0, 0 },
+ },
+ },
+};
+
+/*
+ * csi2_ctx_map_format - Map CSI2 sink media bus format to CSI2 format ID
+ * @csi2: ISP CSI2 device
+ *
+ * Returns CSI2 physical format id
+ */
+static u16 csi2_ctx_map_format(struct isp_csi2_device *csi2)
+{
+ const struct v4l2_mbus_framefmt *fmt = &csi2->formats[CSI2_PAD_SINK];
+ int fmtidx, destidx, is_3630;
+
+ switch (fmt->code) {
+ case V4L2_MBUS_FMT_SGRBG10_1X10:
+ case V4L2_MBUS_FMT_SRGGB10_1X10:
+ case V4L2_MBUS_FMT_SBGGR10_1X10:
+ case V4L2_MBUS_FMT_SGBRG10_1X10:
+ fmtidx = 0;
+ break;
+ case V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8:
+ case V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8:
+ case V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8:
+ case V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8:
+ fmtidx = 1;
+ break;
+ case V4L2_MBUS_FMT_YUYV8_2X8:
+ fmtidx = 2;
+ break;
+ default:
+ WARN(1, KERN_ERR "CSI2: pixel format %08x unsupported!\n",
+ fmt->code);
+ return 0;
+ }
+
+ if (!(csi2->output & CSI2_OUTPUT_CCDC) &&
+ !(csi2->output & CSI2_OUTPUT_MEMORY)) {
+ /* Neither output enabled is a valid combination */
+ return CSI2_PIX_FMT_OTHERS;
+ }
+
+ /* If we need to skip frames at the beginning of the stream disable the
+ * video port to avoid sending the skipped frames to the CCDC.
+ */
+ destidx = csi2->frame_skip ? 0 : !!(csi2->output & CSI2_OUTPUT_CCDC);
+ is_3630 = csi2->isp->revision == ISP_REVISION_15_0;
+
+ return __csi2_fmt_map[fmtidx][destidx][csi2->dpcm_decompress][is_3630];
+}
+
+/*
+ * csi2_set_outaddr - Set memory address to save output image
+ * @csi2: Pointer to ISP CSI2a device.
+ * @addr: ISP MMU Mapped 32-bit memory address aligned on 32 byte boundary.
+ *
+ * Sets the memory address where the output will be saved.
+ *
+ * Returns 0 if successful, or -EINVAL if the address is not in the 32 byte
+ * boundary.
+ */
+static void csi2_set_outaddr(struct isp_csi2_device *csi2, u32 addr)
+{
+ struct isp_device *isp = csi2->isp;
+ struct isp_csi2_ctx_cfg *ctx = &csi2->contexts[0];
+
+ ctx->ping_addr = addr;
+ ctx->pong_addr = addr;
+ isp_reg_writel(isp, ctx->ping_addr,
+ csi2->regs1, ISPCSI2_CTX_DAT_PING_ADDR(ctx->ctxnum));
+ isp_reg_writel(isp, ctx->pong_addr,
+ csi2->regs1, ISPCSI2_CTX_DAT_PONG_ADDR(ctx->ctxnum));
+}
+
+/*
+ * is_usr_def_mapping - Checks whether USER_DEF_MAPPING should
+ * be enabled by CSI2.
+ * @format_id: mapped format id
+ *
+ */
+static inline int is_usr_def_mapping(u32 format_id)
+{
+ return (format_id & 0x40) ? 1 : 0;
+}
+
+/*
+ * csi2_ctx_enable - Enable specified CSI2 context
+ * @ctxnum: Context number, valid between 0 and 7 values.
+ * @enable: enable
+ *
+ */
+static void csi2_ctx_enable(struct isp_device *isp,
+ struct isp_csi2_device *csi2, u8 ctxnum, u8 enable)
+{
+ struct isp_csi2_ctx_cfg *ctx = &csi2->contexts[ctxnum];
+ unsigned int skip = 0;
+ u32 reg;
+
+ reg = isp_reg_readl(isp, csi2->regs1, ISPCSI2_CTX_CTRL1(ctxnum));
+
+ if (enable) {
+ if (csi2->frame_skip)
+ skip = csi2->frame_skip;
+ else if (csi2->output & CSI2_OUTPUT_MEMORY)
+ skip = 1;
+
+ reg &= ~ISPCSI2_CTX_CTRL1_COUNT_MASK;
+ reg |= ISPCSI2_CTX_CTRL1_COUNT_UNLOCK
+ | (skip << ISPCSI2_CTX_CTRL1_COUNT_SHIFT)
+ | ISPCSI2_CTX_CTRL1_CTX_EN;
+ } else {
+ reg &= ~ISPCSI2_CTX_CTRL1_CTX_EN;
+ }
+
+ isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_CTX_CTRL1(ctxnum));
+ ctx->enabled = enable;
+}
+
+/*
+ * csi2_ctx_config - CSI2 context configuration.
+ * @ctx: context configuration
+ *
+ */
+static void csi2_ctx_config(struct isp_device *isp,
+ struct isp_csi2_device *csi2,
+ struct isp_csi2_ctx_cfg *ctx)
+{
+ u32 reg;
+
+ /* Set up CSI2_CTx_CTRL1 */
+ reg = isp_reg_readl(isp, csi2->regs1, ISPCSI2_CTX_CTRL1(ctx->ctxnum));
+
+ if (ctx->eof_enabled)
+ reg |= ISPCSI2_CTX_CTRL1_EOF_EN;
+ else
+ reg &= ~ISPCSI2_CTX_CTRL1_EOF_EN;
+
+ if (ctx->eol_enabled)
+ reg |= ISPCSI2_CTX_CTRL1_EOL_EN;
+ else
+ reg &= ~ISPCSI2_CTX_CTRL1_EOL_EN;
+
+ if (ctx->checksum_enabled)
+ reg |= ISPCSI2_CTX_CTRL1_CS_EN;
+ else
+ reg &= ~ISPCSI2_CTX_CTRL1_CS_EN;
+
+ isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_CTX_CTRL1(ctx->ctxnum));
+
+ /* Set up CSI2_CTx_CTRL2 */
+ reg = isp_reg_readl(isp, csi2->regs1, ISPCSI2_CTX_CTRL2(ctx->ctxnum));
+
+ reg &= ~(ISPCSI2_CTX_CTRL2_VIRTUAL_ID_MASK);
+ reg |= ctx->virtual_id << ISPCSI2_CTX_CTRL2_VIRTUAL_ID_SHIFT;
+
+ reg &= ~(ISPCSI2_CTX_CTRL2_FORMAT_MASK);
+ reg |= ctx->format_id << ISPCSI2_CTX_CTRL2_FORMAT_SHIFT;
+
+ if (ctx->dpcm_decompress) {
+ if (ctx->dpcm_predictor)
+ reg |= ISPCSI2_CTX_CTRL2_DPCM_PRED;
+ else
+ reg &= ~ISPCSI2_CTX_CTRL2_DPCM_PRED;
+ }
+
+ if (is_usr_def_mapping(ctx->format_id)) {
+ reg &= ~ISPCSI2_CTX_CTRL2_USER_DEF_MAP_MASK;
+ reg |= 2 << ISPCSI2_CTX_CTRL2_USER_DEF_MAP_SHIFT;
+ }
+
+ isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_CTX_CTRL2(ctx->ctxnum));
+
+ /* Set up CSI2_CTx_CTRL3 */
+ reg = isp_reg_readl(isp, csi2->regs1, ISPCSI2_CTX_CTRL3(ctx->ctxnum));
+ reg &= ~(ISPCSI2_CTX_CTRL3_ALPHA_MASK);
+ reg |= (ctx->alpha << ISPCSI2_CTX_CTRL3_ALPHA_SHIFT);
+
+ isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_CTX_CTRL3(ctx->ctxnum));
+
+ /* Set up CSI2_CTx_DAT_OFST */
+ reg = isp_reg_readl(isp, csi2->regs1,
+ ISPCSI2_CTX_DAT_OFST(ctx->ctxnum));
+ reg &= ~ISPCSI2_CTX_DAT_OFST_OFST_MASK;
+ reg |= ctx->data_offset << ISPCSI2_CTX_DAT_OFST_OFST_SHIFT;
+ isp_reg_writel(isp, reg, csi2->regs1,
+ ISPCSI2_CTX_DAT_OFST(ctx->ctxnum));
+
+ isp_reg_writel(isp, ctx->ping_addr,
+ csi2->regs1, ISPCSI2_CTX_DAT_PING_ADDR(ctx->ctxnum));
+
+ isp_reg_writel(isp, ctx->pong_addr,
+ csi2->regs1, ISPCSI2_CTX_DAT_PONG_ADDR(ctx->ctxnum));
+}
+
+/*
+ * csi2_timing_config - CSI2 timing configuration.
+ * @timing: csi2_timing_cfg structure
+ */
+static void csi2_timing_config(struct isp_device *isp,
+ struct isp_csi2_device *csi2,
+ struct isp_csi2_timing_cfg *timing)
+{
+ u32 reg;
+
+ reg = isp_reg_readl(isp, csi2->regs1, ISPCSI2_TIMING);
+
+ if (timing->force_rx_mode)
+ reg |= ISPCSI2_TIMING_FORCE_RX_MODE_IO(timing->ionum);
+ else
+ reg &= ~ISPCSI2_TIMING_FORCE_RX_MODE_IO(timing->ionum);
+
+ if (timing->stop_state_16x)
+ reg |= ISPCSI2_TIMING_STOP_STATE_X16_IO(timing->ionum);
+ else
+ reg &= ~ISPCSI2_TIMING_STOP_STATE_X16_IO(timing->ionum);
+
+ if (timing->stop_state_4x)
+ reg |= ISPCSI2_TIMING_STOP_STATE_X4_IO(timing->ionum);
+ else
+ reg &= ~ISPCSI2_TIMING_STOP_STATE_X4_IO(timing->ionum);
+
+ reg &= ~ISPCSI2_TIMING_STOP_STATE_COUNTER_IO_MASK(timing->ionum);
+ reg |= timing->stop_state_counter <<
+ ISPCSI2_TIMING_STOP_STATE_COUNTER_IO_SHIFT(timing->ionum);
+
+ isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_TIMING);
+}
+
+/*
+ * csi2_irq_ctx_set - Enables CSI2 Context IRQs.
+ * @enable: Enable/disable CSI2 Context interrupts
+ */
+static void csi2_irq_ctx_set(struct isp_device *isp,
+ struct isp_csi2_device *csi2, int enable)
+{
+ int i;
+
+ for (i = 0; i < 8; i++) {
+ isp_reg_writel(isp, ISPCSI2_CTX_IRQSTATUS_FE_IRQ, csi2->regs1,
+ ISPCSI2_CTX_IRQSTATUS(i));
+ if (enable)
+ isp_reg_set(isp, csi2->regs1, ISPCSI2_CTX_IRQENABLE(i),
+ ISPCSI2_CTX_IRQSTATUS_FE_IRQ);
+ else
+ isp_reg_clr(isp, csi2->regs1, ISPCSI2_CTX_IRQENABLE(i),
+ ISPCSI2_CTX_IRQSTATUS_FE_IRQ);
+ }
+}
+
+/*
+ * csi2_irq_complexio1_set - Enables CSI2 ComplexIO IRQs.
+ * @enable: Enable/disable CSI2 ComplexIO #1 interrupts
+ */
+static void csi2_irq_complexio1_set(struct isp_device *isp,
+ struct isp_csi2_device *csi2, int enable)
+{
+ u32 reg;
+ reg = ISPCSI2_PHY_IRQENABLE_STATEALLULPMEXIT |
+ ISPCSI2_PHY_IRQENABLE_STATEALLULPMENTER |
+ ISPCSI2_PHY_IRQENABLE_STATEULPM5 |
+ ISPCSI2_PHY_IRQENABLE_ERRCONTROL5 |
+ ISPCSI2_PHY_IRQENABLE_ERRESC5 |
+ ISPCSI2_PHY_IRQENABLE_ERRSOTSYNCHS5 |
+ ISPCSI2_PHY_IRQENABLE_ERRSOTHS5 |
+ ISPCSI2_PHY_IRQENABLE_STATEULPM4 |
+ ISPCSI2_PHY_IRQENABLE_ERRCONTROL4 |
+ ISPCSI2_PHY_IRQENABLE_ERRESC4 |
+ ISPCSI2_PHY_IRQENABLE_ERRSOTSYNCHS4 |
+ ISPCSI2_PHY_IRQENABLE_ERRSOTHS4 |
+ ISPCSI2_PHY_IRQENABLE_STATEULPM3 |
+ ISPCSI2_PHY_IRQENABLE_ERRCONTROL3 |
+ ISPCSI2_PHY_IRQENABLE_ERRESC3 |
+ ISPCSI2_PHY_IRQENABLE_ERRSOTSYNCHS3 |
+ ISPCSI2_PHY_IRQENABLE_ERRSOTHS3 |
+ ISPCSI2_PHY_IRQENABLE_STATEULPM2 |
+ ISPCSI2_PHY_IRQENABLE_ERRCONTROL2 |
+ ISPCSI2_PHY_IRQENABLE_ERRESC2 |
+ ISPCSI2_PHY_IRQENABLE_ERRSOTSYNCHS2 |
+ ISPCSI2_PHY_IRQENABLE_ERRSOTHS2 |
+ ISPCSI2_PHY_IRQENABLE_STATEULPM1 |
+ ISPCSI2_PHY_IRQENABLE_ERRCONTROL1 |
+ ISPCSI2_PHY_IRQENABLE_ERRESC1 |
+ ISPCSI2_PHY_IRQENABLE_ERRSOTSYNCHS1 |
+ ISPCSI2_PHY_IRQENABLE_ERRSOTHS1;
+ isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_PHY_IRQSTATUS);
+ if (enable)
+ reg |= isp_reg_readl(isp, csi2->regs1, ISPCSI2_PHY_IRQENABLE);
+ else
+ reg = 0;
+ isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_PHY_IRQENABLE);
+}
+
+/*
+ * csi2_irq_status_set - Enables CSI2 Status IRQs.
+ * @enable: Enable/disable CSI2 Status interrupts
+ */
+static void csi2_irq_status_set(struct isp_device *isp,
+ struct isp_csi2_device *csi2, int enable)
+{
+ u32 reg;
+ reg = ISPCSI2_IRQSTATUS_OCP_ERR_IRQ |
+ ISPCSI2_IRQSTATUS_SHORT_PACKET_IRQ |
+ ISPCSI2_IRQSTATUS_ECC_CORRECTION_IRQ |
+ ISPCSI2_IRQSTATUS_ECC_NO_CORRECTION_IRQ |
+ ISPCSI2_IRQSTATUS_COMPLEXIO2_ERR_IRQ |
+ ISPCSI2_IRQSTATUS_COMPLEXIO1_ERR_IRQ |
+ ISPCSI2_IRQSTATUS_FIFO_OVF_IRQ |
+ ISPCSI2_IRQSTATUS_CONTEXT(0);
+ isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_IRQSTATUS);
+ if (enable)
+ reg |= isp_reg_readl(isp, csi2->regs1, ISPCSI2_IRQENABLE);
+ else
+ reg = 0;
+
+ isp_reg_writel(isp, reg, csi2->regs1, ISPCSI2_IRQENABLE);
+}
+
+/*
+ * omap3isp_csi2_reset - Resets the CSI2 module.
+ *
+ * Must be called with the phy lock held.
+ *
+ * Returns 0 if successful, or -EBUSY if power command didn't respond.
+ */
+int omap3isp_csi2_reset(struct isp_csi2_device *csi2)
+{
+ struct isp_device *isp = csi2->isp;
+ u8 soft_reset_retries = 0;
+ u32 reg;
+ int i;
+
+ if (!csi2->available)
+ return -ENODEV;
+
+ if (csi2->phy->phy_in_use)
+ return -EBUSY;
+
+ isp_reg_set(isp, csi2->regs1, ISPCSI2_SYSCONFIG,
+ ISPCSI2_SYSCONFIG_SOFT_RESET);
+
+ do {
+ reg = isp_reg_readl(isp, csi2->regs1, ISPCSI2_SYSSTATUS) &
+ ISPCSI2_SYSSTATUS_RESET_DONE;
+ if (reg == ISPCSI2_SYSSTATUS_RESET_DONE)
+ break;
+ soft_reset_retries++;
+ if (soft_reset_retries < 5)
+ udelay(100);
+ } while (soft_reset_retries < 5);
+
+ if (soft_reset_retries == 5) {
+ printk(KERN_ERR "CSI2: Soft reset try count exceeded!\n");
+ return -EBUSY;
+ }
+
+ if (isp->revision == ISP_REVISION_15_0)
+ isp_reg_set(isp, csi2->regs1, ISPCSI2_PHY_CFG,
+ ISPCSI2_PHY_CFG_RESET_CTRL);
+
+ i = 100;
+ do {
+ reg = isp_reg_readl(isp, csi2->phy->phy_regs, ISPCSIPHY_REG1)
+ & ISPCSIPHY_REG1_RESET_DONE_CTRLCLK;
+ if (reg == ISPCSIPHY_REG1_RESET_DONE_CTRLCLK)
+ break;
+ udelay(100);
+ } while (--i > 0);
+
+ if (i == 0) {
+ printk(KERN_ERR
+ "CSI2: Reset for CSI2_96M_FCLK domain Failed!\n");
+ return -EBUSY;
+ }
+
+ if (isp->autoidle)
+ isp_reg_clr_set(isp, csi2->regs1, ISPCSI2_SYSCONFIG,
+ ISPCSI2_SYSCONFIG_MSTANDBY_MODE_MASK |
+ ISPCSI2_SYSCONFIG_AUTO_IDLE,
+ ISPCSI2_SYSCONFIG_MSTANDBY_MODE_SMART |
+ ((isp->revision == ISP_REVISION_15_0) ?
+ ISPCSI2_SYSCONFIG_AUTO_IDLE : 0));
+ else
+ isp_reg_clr_set(isp, csi2->regs1, ISPCSI2_SYSCONFIG,
+ ISPCSI2_SYSCONFIG_MSTANDBY_MODE_MASK |
+ ISPCSI2_SYSCONFIG_AUTO_IDLE,
+ ISPCSI2_SYSCONFIG_MSTANDBY_MODE_NO);
+
+ return 0;
+}
+
+static int csi2_configure(struct isp_csi2_device *csi2)
+{
+ const struct isp_v4l2_subdevs_group *pdata;
+ struct isp_device *isp = csi2->isp;
+ struct isp_csi2_timing_cfg *timing = &csi2->timing[0];
+ struct v4l2_subdev *sensor;
+ struct media_pad *pad;
+
+ /*
+ * CSI2 fields that can be updated while the context has
+ * been enabled or the interface has been enabled are not
+ * updated dynamically currently. So we do not allow to
+ * reconfigure if either has been enabled
+ */
+ if (csi2->contexts[0].enabled || csi2->ctrl.if_enable)
+ return -EBUSY;
+
+ pad = media_entity_remote_source(&csi2->pads[CSI2_PAD_SINK]);
+ sensor = media_entity_to_v4l2_subdev(pad->entity);
+ pdata = sensor->host_priv;
+
+ csi2->frame_skip = 0;
+ v4l2_subdev_call(sensor, sensor, g_skip_frames, &csi2->frame_skip);
+
+ csi2->ctrl.vp_out_ctrl = pdata->bus.csi2.vpclk_div;
+ csi2->ctrl.frame_mode = ISP_CSI2_FRAME_IMMEDIATE;
+ csi2->ctrl.ecc_enable = pdata->bus.csi2.crc;
+
+ timing->ionum = 1;
+ timing->force_rx_mode = 1;
+ timing->stop_state_16x = 1;
+ timing->stop_state_4x = 1;
+ timing->stop_state_counter = 0x1FF;
+
+ /*
+ * The CSI2 receiver can't do any format conversion except DPCM
+ * decompression, so every set_format call configures both pads
+ * and enables DPCM decompression as a special case:
+ */
+ if (csi2->formats[CSI2_PAD_SINK].code !=
+ csi2->formats[CSI2_PAD_SOURCE].code)
+ csi2->dpcm_decompress = true;
+ else
+ csi2->dpcm_decompress = false;
+
+ csi2->contexts[0].format_id = csi2_ctx_map_format(csi2);
+
+ if (csi2->video_out.bpl_padding == 0)
+ csi2->contexts[0].data_offset = 0;
+ else
+ csi2->contexts[0].data_offset = csi2->video_out.bpl_value;
+
+ /*
+ * Enable end of frame and end of line signals generation for
+ * context 0. These signals are generated from CSI2 receiver to
+ * qualify the last pixel of a frame and the last pixel of a line.
+ * Without enabling the signals CSI2 receiver writes data to memory
+ * beyond buffer size and/or data line offset is not handled correctly.
+ */
+ csi2->contexts[0].eof_enabled = 1;
+ csi2->contexts[0].eol_enabled = 1;
+
+ csi2_irq_complexio1_set(isp, csi2, 1);
+ csi2_irq_ctx_set(isp, csi2, 1);
+ csi2_irq_status_set(isp, csi2, 1);
+
+ /* Set configuration (timings, format and links) */
+ csi2_timing_config(isp, csi2, timing);
+ csi2_recv_config(isp, csi2, &csi2->ctrl);
+ csi2_ctx_config(isp, csi2, &csi2->contexts[0]);
+
+ return 0;
+}
+
+/*
+ * csi2_print_status - Prints CSI2 debug information.
+ */
+#define CSI2_PRINT_REGISTER(isp, regs, name)\
+ dev_dbg(isp->dev, "###CSI2 " #name "=0x%08x\n", \
+ isp_reg_readl(isp, regs, ISPCSI2_##name))
+
+static void csi2_print_status(struct isp_csi2_device *csi2)
+{
+ struct isp_device *isp = csi2->isp;
+
+ if (!csi2->available)
+ return;
+
+ dev_dbg(isp->dev, "-------------CSI2 Register dump-------------\n");
+
+ CSI2_PRINT_REGISTER(isp, csi2->regs1, SYSCONFIG);
+ CSI2_PRINT_REGISTER(isp, csi2->regs1, SYSSTATUS);
+ CSI2_PRINT_REGISTER(isp, csi2->regs1, IRQENABLE);
+ CSI2_PRINT_REGISTER(isp, csi2->regs1, IRQSTATUS);
+ CSI2_PRINT_REGISTER(isp, csi2->regs1, CTRL);
+ CSI2_PRINT_REGISTER(isp, csi2->regs1, DBG_H);
+ CSI2_PRINT_REGISTER(isp, csi2->regs1, GNQ);
+ CSI2_PRINT_REGISTER(isp, csi2->regs1, PHY_CFG);
+ CSI2_PRINT_REGISTER(isp, csi2->regs1, PHY_IRQSTATUS);
+ CSI2_PRINT_REGISTER(isp, csi2->regs1, SHORT_PACKET);
+ CSI2_PRINT_REGISTER(isp, csi2->regs1, PHY_IRQENABLE);
+ CSI2_PRINT_REGISTER(isp, csi2->regs1, DBG_P);
+ CSI2_PRINT_REGISTER(isp, csi2->regs1, TIMING);
+ CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_CTRL1(0));
+ CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_CTRL2(0));
+ CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_DAT_OFST(0));
+ CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_DAT_PING_ADDR(0));
+ CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_DAT_PONG_ADDR(0));
+ CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_IRQENABLE(0));
+ CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_IRQSTATUS(0));
+ CSI2_PRINT_REGISTER(isp, csi2->regs1, CTX_CTRL3(0));
+
+ dev_dbg(isp->dev, "--------------------------------------------\n");
+}
+
+/* -----------------------------------------------------------------------------
+ * Interrupt handling
+ */
+
+/*
+ * csi2_isr_buffer - Does buffer handling at end-of-frame
+ * when writing to memory.
+ */
+static void csi2_isr_buffer(struct isp_csi2_device *csi2)
+{
+ struct isp_device *isp = csi2->isp;
+ struct isp_buffer *buffer;
+
+ csi2_ctx_enable(isp, csi2, 0, 0);
+
+ buffer = omap3isp_video_buffer_next(&csi2->video_out);
+
+ /*
+ * Let video queue operation restart engine if there is an underrun
+ * condition.
+ */
+ if (buffer == NULL)
+ return;
+
+ csi2_set_outaddr(csi2, buffer->isp_addr);
+ csi2_ctx_enable(isp, csi2, 0, 1);
+}
+
+static void csi2_isr_ctx(struct isp_csi2_device *csi2,
+ struct isp_csi2_ctx_cfg *ctx)
+{
+ struct isp_device *isp = csi2->isp;
+ unsigned int n = ctx->ctxnum;
+ u32 status;
+
+ status = isp_reg_readl(isp, csi2->regs1, ISPCSI2_CTX_IRQSTATUS(n));
+ isp_reg_writel(isp, status, csi2->regs1, ISPCSI2_CTX_IRQSTATUS(n));
+
+ if (!(status & ISPCSI2_CTX_IRQSTATUS_FE_IRQ))
+ return;
+
+ /* Skip interrupts until we reach the frame skip count. The CSI2 will be
+ * automatically disabled, as the frame skip count has been programmed
+ * in the CSI2_CTx_CTRL1::COUNT field, so reenable it.
+ *
+ * It would have been nice to rely on the FRAME_NUMBER interrupt instead
+ * but it turned out that the interrupt is only generated when the CSI2
+ * writes to memory (the CSI2_CTx_CTRL1::COUNT field is decreased
+ * correctly and reaches 0 when data is forwarded to the video port only
+ * but no interrupt arrives). Maybe a CSI2 hardware bug.
+ */
+ if (csi2->frame_skip) {
+ csi2->frame_skip--;
+ if (csi2->frame_skip == 0) {
+ ctx->format_id = csi2_ctx_map_format(csi2);
+ csi2_ctx_config(isp, csi2, ctx);
+ csi2_ctx_enable(isp, csi2, n, 1);
+ }
+ return;
+ }
+
+ if (csi2->output & CSI2_OUTPUT_MEMORY)
+ csi2_isr_buffer(csi2);
+}
+
+/*
+ * omap3isp_csi2_isr - CSI2 interrupt handling.
+ */
+void omap3isp_csi2_isr(struct isp_csi2_device *csi2)
+{
+ struct isp_pipeline *pipe = to_isp_pipeline(&csi2->subdev.entity);
+ u32 csi2_irqstatus, cpxio1_irqstatus;
+ struct isp_device *isp = csi2->isp;
+
+ if (!csi2->available)
+ return;
+
+ csi2_irqstatus = isp_reg_readl(isp, csi2->regs1, ISPCSI2_IRQSTATUS);
+ isp_reg_writel(isp, csi2_irqstatus, csi2->regs1, ISPCSI2_IRQSTATUS);
+
+ /* Failure Cases */
+ if (csi2_irqstatus & ISPCSI2_IRQSTATUS_COMPLEXIO1_ERR_IRQ) {
+ cpxio1_irqstatus = isp_reg_readl(isp, csi2->regs1,
+ ISPCSI2_PHY_IRQSTATUS);
+ isp_reg_writel(isp, cpxio1_irqstatus,
+ csi2->regs1, ISPCSI2_PHY_IRQSTATUS);
+ dev_dbg(isp->dev, "CSI2: ComplexIO Error IRQ "
+ "%x\n", cpxio1_irqstatus);
+ pipe->error = true;
+ }
+
+ if (csi2_irqstatus & (ISPCSI2_IRQSTATUS_OCP_ERR_IRQ |
+ ISPCSI2_IRQSTATUS_SHORT_PACKET_IRQ |
+ ISPCSI2_IRQSTATUS_ECC_NO_CORRECTION_IRQ |
+ ISPCSI2_IRQSTATUS_COMPLEXIO2_ERR_IRQ |
+ ISPCSI2_IRQSTATUS_FIFO_OVF_IRQ)) {
+ dev_dbg(isp->dev, "CSI2 Err:"
+ " OCP:%d,"
+ " Short_pack:%d,"
+ " ECC:%d,"
+ " CPXIO2:%d,"
+ " FIFO_OVF:%d,"
+ "\n",
+ (csi2_irqstatus &
+ ISPCSI2_IRQSTATUS_OCP_ERR_IRQ) ? 1 : 0,
+ (csi2_irqstatus &
+ ISPCSI2_IRQSTATUS_SHORT_PACKET_IRQ) ? 1 : 0,
+ (csi2_irqstatus &
+ ISPCSI2_IRQSTATUS_ECC_NO_CORRECTION_IRQ) ? 1 : 0,
+ (csi2_irqstatus &
+ ISPCSI2_IRQSTATUS_COMPLEXIO2_ERR_IRQ) ? 1 : 0,
+ (csi2_irqstatus &
+ ISPCSI2_IRQSTATUS_FIFO_OVF_IRQ) ? 1 : 0);
+ pipe->error = true;
+ }
+
+ if (omap3isp_module_sync_is_stopping(&csi2->wait, &csi2->stopping))
+ return;
+
+ /* Successful cases */
+ if (csi2_irqstatus & ISPCSI2_IRQSTATUS_CONTEXT(0))
+ csi2_isr_ctx(csi2, &csi2->contexts[0]);
+
+ if (csi2_irqstatus & ISPCSI2_IRQSTATUS_ECC_CORRECTION_IRQ)
+ dev_dbg(isp->dev, "CSI2: ECC correction done\n");
+}
+
+/* -----------------------------------------------------------------------------
+ * ISP video operations
+ */
+
+/*
+ * csi2_queue - Queues the first buffer when using memory output
+ * @video: The video node
+ * @buffer: buffer to queue
+ */
+static int csi2_queue(struct isp_video *video, struct isp_buffer *buffer)
+{
+ struct isp_device *isp = video->isp;
+ struct isp_csi2_device *csi2 = &isp->isp_csi2a;
+
+ csi2_set_outaddr(csi2, buffer->isp_addr);
+
+ /*
+ * If streaming was enabled before there was a buffer queued
+ * or underrun happened in the ISR, the hardware was not enabled
+ * and DMA queue flag ISP_VIDEO_DMAQUEUE_UNDERRUN is still set.
+ * Enable it now.
+ */
+ if (csi2->video_out.dmaqueue_flags & ISP_VIDEO_DMAQUEUE_UNDERRUN) {
+ /* Enable / disable context 0 and IRQs */
+ csi2_if_enable(isp, csi2, 1);
+ csi2_ctx_enable(isp, csi2, 0, 1);
+ isp_video_dmaqueue_flags_clr(&csi2->video_out);
+ }
+
+ return 0;
+}
+
+static const struct isp_video_operations csi2_ispvideo_ops = {
+ .queue = csi2_queue,
+};
+
+/* -----------------------------------------------------------------------------
+ * V4L2 subdev operations
+ */
+
+static struct v4l2_mbus_framefmt *
+__csi2_get_format(struct isp_csi2_device *csi2, struct v4l2_subdev_fh *fh,
+ unsigned int pad, enum v4l2_subdev_format_whence which)
+{
+ if (which == V4L2_SUBDEV_FORMAT_TRY)
+ return v4l2_subdev_get_try_format(fh, pad);
+ else
+ return &csi2->formats[pad];
+}
+
+static void
+csi2_try_format(struct isp_csi2_device *csi2, struct v4l2_subdev_fh *fh,
+ unsigned int pad, struct v4l2_mbus_framefmt *fmt,
+ enum v4l2_subdev_format_whence which)
+{
+ enum v4l2_mbus_pixelcode pixelcode;
+ struct v4l2_mbus_framefmt *format;
+ const struct isp_format_info *info;
+ unsigned int i;
+
+ switch (pad) {
+ case CSI2_PAD_SINK:
+ /* Clamp the width and height to valid range (1-8191). */
+ for (i = 0; i < ARRAY_SIZE(csi2_input_fmts); i++) {
+ if (fmt->code == csi2_input_fmts[i])
+ break;
+ }
+
+ /* If not found, use SGRBG10 as default */
+ if (i >= ARRAY_SIZE(csi2_input_fmts))
+ fmt->code = V4L2_MBUS_FMT_SGRBG10_1X10;
+
+ fmt->width = clamp_t(u32, fmt->width, 1, 8191);
+ fmt->height = clamp_t(u32, fmt->height, 1, 8191);
+ break;
+
+ case CSI2_PAD_SOURCE:
+ /* Source format same as sink format, except for DPCM
+ * compression.
+ */
+ pixelcode = fmt->code;
+ format = __csi2_get_format(csi2, fh, CSI2_PAD_SINK, which);
+ memcpy(fmt, format, sizeof(*fmt));
+
+ /*
+ * Only Allow DPCM decompression, and check that the
+ * pattern is preserved
+ */
+ info = omap3isp_video_format_info(fmt->code);
+ if (info->uncompressed == pixelcode)
+ fmt->code = pixelcode;
+ break;
+ }
+
+ /* RGB, non-interlaced */
+ fmt->colorspace = V4L2_COLORSPACE_SRGB;
+ fmt->field = V4L2_FIELD_NONE;
+}
+
+/*
+ * csi2_enum_mbus_code - Handle pixel format enumeration
+ * @sd : pointer to v4l2 subdev structure
+ * @fh : V4L2 subdev file handle
+ * @code : pointer to v4l2_subdev_mbus_code_enum structure
+ * return -EINVAL or zero on success
+ */
+static int csi2_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *format;
+ const struct isp_format_info *info;
+
+ if (code->pad == CSI2_PAD_SINK) {
+ if (code->index >= ARRAY_SIZE(csi2_input_fmts))
+ return -EINVAL;
+
+ code->code = csi2_input_fmts[code->index];
+ } else {
+ format = __csi2_get_format(csi2, fh, CSI2_PAD_SINK,
+ V4L2_SUBDEV_FORMAT_TRY);
+ switch (code->index) {
+ case 0:
+ /* Passthrough sink pad code */
+ code->code = format->code;
+ break;
+ case 1:
+ /* Uncompressed code */
+ info = omap3isp_video_format_info(format->code);
+ if (info->uncompressed == format->code)
+ return -EINVAL;
+
+ code->code = info->uncompressed;
+ break;
+ default:
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static int csi2_enum_frame_size(struct v4l2_subdev *sd,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt format;
+
+ if (fse->index != 0)
+ return -EINVAL;
+
+ format.code = fse->code;
+ format.width = 1;
+ format.height = 1;
+ csi2_try_format(csi2, fh, fse->pad, &format, V4L2_SUBDEV_FORMAT_TRY);
+ fse->min_width = format.width;
+ fse->min_height = format.height;
+
+ if (format.code != fse->code)
+ return -EINVAL;
+
+ format.code = fse->code;
+ format.width = -1;
+ format.height = -1;
+ csi2_try_format(csi2, fh, fse->pad, &format, V4L2_SUBDEV_FORMAT_TRY);
+ fse->max_width = format.width;
+ fse->max_height = format.height;
+
+ return 0;
+}
+
+/*
+ * csi2_get_format - Handle get format by pads subdev method
+ * @sd : pointer to v4l2 subdev structure
+ * @fh : V4L2 subdev file handle
+ * @fmt: pointer to v4l2 subdev format structure
+ * return -EINVAL or zero on success
+ */
+static int csi2_get_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_format *fmt)
+{
+ struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *format;
+
+ format = __csi2_get_format(csi2, fh, fmt->pad, fmt->which);
+ if (format == NULL)
+ return -EINVAL;
+
+ fmt->format = *format;
+ return 0;
+}
+
+/*
+ * csi2_set_format - Handle set format by pads subdev method
+ * @sd : pointer to v4l2 subdev structure
+ * @fh : V4L2 subdev file handle
+ * @fmt: pointer to v4l2 subdev format structure
+ * return -EINVAL or zero on success
+ */
+static int csi2_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_format *fmt)
+{
+ struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *format;
+
+ format = __csi2_get_format(csi2, fh, fmt->pad, fmt->which);
+ if (format == NULL)
+ return -EINVAL;
+
+ csi2_try_format(csi2, fh, fmt->pad, &fmt->format, fmt->which);
+ *format = fmt->format;
+
+ /* Propagate the format from sink to source */
+ if (fmt->pad == CSI2_PAD_SINK) {
+ format = __csi2_get_format(csi2, fh, CSI2_PAD_SOURCE,
+ fmt->which);
+ *format = fmt->format;
+ csi2_try_format(csi2, fh, CSI2_PAD_SOURCE, format, fmt->which);
+ }
+
+ return 0;
+}
+
+/*
+ * csi2_init_formats - Initialize formats on all pads
+ * @sd: ISP CSI2 V4L2 subdevice
+ * @fh: V4L2 subdev file handle
+ *
+ * Initialize all pad formats with default values. If fh is not NULL, try
+ * formats are initialized on the file handle. Otherwise active formats are
+ * initialized on the device.
+ */
+static int csi2_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ struct v4l2_subdev_format format;
+
+ memset(&format, 0, sizeof(format));
+ format.pad = CSI2_PAD_SINK;
+ format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
+ format.format.code = V4L2_MBUS_FMT_SGRBG10_1X10;
+ format.format.width = 4096;
+ format.format.height = 4096;
+ csi2_set_format(sd, fh, &format);
+
+ return 0;
+}
+
+/*
+ * csi2_set_stream - Enable/Disable streaming on the CSI2 module
+ * @sd: ISP CSI2 V4L2 subdevice
+ * @enable: ISP pipeline stream state
+ *
+ * Return 0 on success or a negative error code otherwise.
+ */
+static int csi2_set_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd);
+ struct isp_device *isp = csi2->isp;
+ struct isp_video *video_out = &csi2->video_out;
+
+ switch (enable) {
+ case ISP_PIPELINE_STREAM_CONTINUOUS:
+ if (omap3isp_csiphy_acquire(csi2->phy) < 0)
+ return -ENODEV;
+ if (csi2->output & CSI2_OUTPUT_MEMORY)
+ omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_CSI2A_WRITE);
+ csi2_configure(csi2);
+ csi2_print_status(csi2);
+
+ /*
+ * When outputting to memory with no buffer available, let the
+ * buffer queue handler start the hardware. A DMA queue flag
+ * ISP_VIDEO_DMAQUEUE_QUEUED will be set as soon as there is
+ * a buffer available.
+ */
+ if (csi2->output & CSI2_OUTPUT_MEMORY &&
+ !(video_out->dmaqueue_flags & ISP_VIDEO_DMAQUEUE_QUEUED))
+ break;
+ /* Enable context 0 and IRQs */
+ atomic_set(&csi2->stopping, 0);
+ csi2_ctx_enable(isp, csi2, 0, 1);
+ csi2_if_enable(isp, csi2, 1);
+ isp_video_dmaqueue_flags_clr(video_out);
+ break;
+
+ case ISP_PIPELINE_STREAM_STOPPED:
+ if (csi2->state == ISP_PIPELINE_STREAM_STOPPED)
+ return 0;
+ if (omap3isp_module_sync_idle(&sd->entity, &csi2->wait,
+ &csi2->stopping))
+ dev_dbg(isp->dev, "%s: module stop timeout.\n",
+ sd->name);
+ csi2_ctx_enable(isp, csi2, 0, 0);
+ csi2_if_enable(isp, csi2, 0);
+ csi2_irq_ctx_set(isp, csi2, 0);
+ omap3isp_csiphy_release(csi2->phy);
+ isp_video_dmaqueue_flags_clr(video_out);
+ omap3isp_sbl_disable(isp, OMAP3_ISP_SBL_CSI2A_WRITE);
+ break;
+ }
+
+ csi2->state = enable;
+ return 0;
+}
+
+/* subdev video operations */
+static const struct v4l2_subdev_video_ops csi2_video_ops = {
+ .s_stream = csi2_set_stream,
+};
+
+/* subdev pad operations */
+static const struct v4l2_subdev_pad_ops csi2_pad_ops = {
+ .enum_mbus_code = csi2_enum_mbus_code,
+ .enum_frame_size = csi2_enum_frame_size,
+ .get_fmt = csi2_get_format,
+ .set_fmt = csi2_set_format,
+};
+
+/* subdev operations */
+static const struct v4l2_subdev_ops csi2_ops = {
+ .video = &csi2_video_ops,
+ .pad = &csi2_pad_ops,
+};
+
+/* subdev internal operations */
+static const struct v4l2_subdev_internal_ops csi2_internal_ops = {
+ .open = csi2_init_formats,
+};
+
+/* -----------------------------------------------------------------------------
+ * Media entity operations
+ */
+
+/*
+ * csi2_link_setup - Setup CSI2 connections.
+ * @entity : Pointer to media entity structure
+ * @local : Pointer to local pad array
+ * @remote : Pointer to remote pad array
+ * @flags : Link flags
+ * return -EINVAL or zero on success
+ */
+static int csi2_link_setup(struct media_entity *entity,
+ const struct media_pad *local,
+ const struct media_pad *remote, u32 flags)
+{
+ struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
+ struct isp_csi2_device *csi2 = v4l2_get_subdevdata(sd);
+ struct isp_csi2_ctrl_cfg *ctrl = &csi2->ctrl;
+
+ /*
+ * The ISP core doesn't support pipelines with multiple video outputs.
+ * Revisit this when it will be implemented, and return -EBUSY for now.
+ */
+
+ switch (local->index | media_entity_type(remote->entity)) {
+ case CSI2_PAD_SOURCE | MEDIA_ENT_T_DEVNODE:
+ if (flags & MEDIA_LNK_FL_ENABLED) {
+ if (csi2->output & ~CSI2_OUTPUT_MEMORY)
+ return -EBUSY;
+ csi2->output |= CSI2_OUTPUT_MEMORY;
+ } else {
+ csi2->output &= ~CSI2_OUTPUT_MEMORY;
+ }
+ break;
+
+ case CSI2_PAD_SOURCE | MEDIA_ENT_T_V4L2_SUBDEV:
+ if (flags & MEDIA_LNK_FL_ENABLED) {
+ if (csi2->output & ~CSI2_OUTPUT_CCDC)
+ return -EBUSY;
+ csi2->output |= CSI2_OUTPUT_CCDC;
+ } else {
+ csi2->output &= ~CSI2_OUTPUT_CCDC;
+ }
+ break;
+
+ default:
+ /* Link from camera to CSI2 is fixed... */
+ return -EINVAL;
+ }
+
+ ctrl->vp_only_enable =
+ (csi2->output & CSI2_OUTPUT_MEMORY) ? false : true;
+ ctrl->vp_clk_enable = !!(csi2->output & CSI2_OUTPUT_CCDC);
+
+ return 0;
+}
+
+/* media operations */
+static const struct media_entity_operations csi2_media_ops = {
+ .link_setup = csi2_link_setup,
+ .link_validate = v4l2_subdev_link_validate,
+};
+
+void omap3isp_csi2_unregister_entities(struct isp_csi2_device *csi2)
+{
+ v4l2_device_unregister_subdev(&csi2->subdev);
+ omap3isp_video_unregister(&csi2->video_out);
+}
+
+int omap3isp_csi2_register_entities(struct isp_csi2_device *csi2,
+ struct v4l2_device *vdev)
+{
+ int ret;
+
+ /* Register the subdev and video nodes. */
+ ret = v4l2_device_register_subdev(vdev, &csi2->subdev);
+ if (ret < 0)
+ goto error;
+
+ ret = omap3isp_video_register(&csi2->video_out, vdev);
+ if (ret < 0)
+ goto error;
+
+ return 0;
+
+error:
+ omap3isp_csi2_unregister_entities(csi2);
+ return ret;
+}
+
+/* -----------------------------------------------------------------------------
+ * ISP CSI2 initialisation and cleanup
+ */
+
+/*
+ * csi2_init_entities - Initialize subdev and media entity.
+ * @csi2: Pointer to csi2 structure.
+ * return -ENOMEM or zero on success
+ */
+static int csi2_init_entities(struct isp_csi2_device *csi2)
+{
+ struct v4l2_subdev *sd = &csi2->subdev;
+ struct media_pad *pads = csi2->pads;
+ struct media_entity *me = &sd->entity;
+ int ret;
+
+ v4l2_subdev_init(sd, &csi2_ops);
+ sd->internal_ops = &csi2_internal_ops;
+ strlcpy(sd->name, "OMAP3 ISP CSI2a", sizeof(sd->name));
+
+ sd->grp_id = 1 << 16; /* group ID for isp subdevs */
+ v4l2_set_subdevdata(sd, csi2);
+ sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+
+ pads[CSI2_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
+ pads[CSI2_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
+
+ me->ops = &csi2_media_ops;
+ ret = media_entity_init(me, CSI2_PADS_NUM, pads, 0);
+ if (ret < 0)
+ return ret;
+
+ csi2_init_formats(sd, NULL);
+
+ /* Video device node */
+ csi2->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ csi2->video_out.ops = &csi2_ispvideo_ops;
+ csi2->video_out.bpl_alignment = 32;
+ csi2->video_out.bpl_zero_padding = 1;
+ csi2->video_out.bpl_max = 0x1ffe0;
+ csi2->video_out.isp = csi2->isp;
+ csi2->video_out.capture_mem = PAGE_ALIGN(4096 * 4096) * 3;
+
+ ret = omap3isp_video_init(&csi2->video_out, "CSI2a");
+ if (ret < 0)
+ goto error_video;
+
+ /* Connect the CSI2 subdev to the video node. */
+ ret = media_entity_create_link(&csi2->subdev.entity, CSI2_PAD_SOURCE,
+ &csi2->video_out.video.entity, 0, 0);
+ if (ret < 0)
+ goto error_link;
+
+ return 0;
+
+error_link:
+ omap3isp_video_cleanup(&csi2->video_out);
+error_video:
+ media_entity_cleanup(&csi2->subdev.entity);
+ return ret;
+}
+
+/*
+ * omap3isp_csi2_init - Routine for module driver init
+ */
+int omap3isp_csi2_init(struct isp_device *isp)
+{
+ struct isp_csi2_device *csi2a = &isp->isp_csi2a;
+ struct isp_csi2_device *csi2c = &isp->isp_csi2c;
+ int ret;
+
+ csi2a->isp = isp;
+ csi2a->available = 1;
+ csi2a->regs1 = OMAP3_ISP_IOMEM_CSI2A_REGS1;
+ csi2a->regs2 = OMAP3_ISP_IOMEM_CSI2A_REGS2;
+ csi2a->phy = &isp->isp_csiphy2;
+ csi2a->state = ISP_PIPELINE_STREAM_STOPPED;
+ init_waitqueue_head(&csi2a->wait);
+
+ ret = csi2_init_entities(csi2a);
+ if (ret < 0)
+ return ret;
+
+ if (isp->revision == ISP_REVISION_15_0) {
+ csi2c->isp = isp;
+ csi2c->available = 1;
+ csi2c->regs1 = OMAP3_ISP_IOMEM_CSI2C_REGS1;
+ csi2c->regs2 = OMAP3_ISP_IOMEM_CSI2C_REGS2;
+ csi2c->phy = &isp->isp_csiphy1;
+ csi2c->state = ISP_PIPELINE_STREAM_STOPPED;
+ init_waitqueue_head(&csi2c->wait);
+ }
+
+ return 0;
+}
+
+/*
+ * omap3isp_csi2_cleanup - Routine for module driver cleanup
+ */
+void omap3isp_csi2_cleanup(struct isp_device *isp)
+{
+ struct isp_csi2_device *csi2a = &isp->isp_csi2a;
+
+ omap3isp_video_cleanup(&csi2a->video_out);
+ media_entity_cleanup(&csi2a->subdev.entity);
+}

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