--- /dev/null
+/*
+ * TI OMAP4 ISS V4L2 Driver - CSI PHY module
+ *
+ * Copyright (C) 2012 Texas Instruments, Inc.
+ *
+ * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/delay.h>
+#include <media/v4l2-common.h>
+#include <linux/v4l2-mediabus.h>
+#include <linux/mm.h>
+
+#include "iss.h"
+#include "iss_regs.h"
+#include "iss_csi2.h"
+
+/*
+ * csi2_if_enable - Enable CSI2 Receiver interface.
+ * @enable: enable flag
+ *
+ */
+static void csi2_if_enable(struct iss_csi2_device *csi2, u8 enable)
+{
+ struct iss_csi2_ctrl_cfg *currctrl = &csi2->ctrl;
+
+ writel((readl(csi2->regs1 + CSI2_CTRL) & ~CSI2_CTRL_IF_EN) |
+ (enable ? CSI2_CTRL_IF_EN : 0),
+ csi2->regs1 + CSI2_CTRL);
+
+ currctrl->if_enable = enable;
+}
+
+/*
+ * csi2_recv_config - CSI2 receiver module configuration.
+ * @currctrl: iss_csi2_ctrl_cfg structure
+ *
+ */
+static void csi2_recv_config(struct iss_csi2_device *csi2,
+ struct iss_csi2_ctrl_cfg *currctrl)
+{
+ u32 reg = 0;
+
+ if (currctrl->frame_mode)
+ reg |= CSI2_CTRL_FRAME;
+ else
+ reg &= ~CSI2_CTRL_FRAME;
+
+ if (currctrl->vp_clk_enable)
+ reg |= CSI2_CTRL_VP_CLK_EN;
+ else
+ reg &= ~CSI2_CTRL_VP_CLK_EN;
+
+ if (currctrl->vp_only_enable)
+ reg |= CSI2_CTRL_VP_ONLY_EN;
+ else
+ reg &= ~CSI2_CTRL_VP_ONLY_EN;
+
+ reg &= ~CSI2_CTRL_VP_OUT_CTRL_MASK;
+ reg |= currctrl->vp_out_ctrl << CSI2_CTRL_VP_OUT_CTRL_SHIFT;
+
+ if (currctrl->ecc_enable)
+ reg |= CSI2_CTRL_ECC_EN;
+ else
+ reg &= ~CSI2_CTRL_ECC_EN;
+
+ /*
+ * Set MFlag assertion boundaries to:
+ * Low: 4/8 of FIFO size
+ * High: 6/8 of FIFO size
+ */
+ reg &= ~(CSI2_CTRL_MFLAG_LEVH_MASK | CSI2_CTRL_MFLAG_LEVL_MASK);
+ reg |= (2 << CSI2_CTRL_MFLAG_LEVH_SHIFT) |
+ (4 << CSI2_CTRL_MFLAG_LEVL_SHIFT);
+
+ /* Generation of 16x64-bit bursts (Recommended) */
+ reg |= CSI2_CTRL_BURST_SIZE_EXPAND;
+
+ /* Do Non-Posted writes (Recommended) */
+ reg |= CSI2_CTRL_NON_POSTED_WRITE;
+
+ /*
+ * Enforce Little endian for all formats, including:
+ * YUV4:2:2 8-bit and YUV4:2:0 Legacy
+ */
+ reg |= CSI2_CTRL_ENDIANNESS;
+
+ writel(reg, csi2->regs1 + CSI2_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_SBGGR8_1X8,
+ V4L2_MBUS_FMT_SGBRG8_1X8,
+ V4L2_MBUS_FMT_SGRBG8_1X8,
+ V4L2_MBUS_FMT_SRGGB8_1X8,
+ V4L2_MBUS_FMT_UYVY8_1X16,
+ V4L2_MBUS_FMT_YUYV8_1X16,
+};
+
+/* 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)
+ * Output should be CSI2 frame format code
+ * Array indices as follows: [format][dest][decompr]
+ * Not all combinations are valid. 0 means invalid.
+ */
+static const u16 __csi2_fmt_map[][2][2] = {
+ /* RAW10 formats */
+ {
+ /* Output to memory */
+ {
+ /* No DPCM decompression */
+ CSI2_PIX_FMT_RAW10_EXP16,
+ /* DPCM decompression */
+ 0,
+ },
+ /* Output to both */
+ {
+ /* No DPCM decompression */
+ CSI2_PIX_FMT_RAW10_EXP16_VP,
+ /* DPCM decompression */
+ 0,
+ },
+ },
+ /* RAW10 DPCM8 formats */
+ {
+ /* Output to memory */
+ {
+ /* No DPCM decompression */
+ CSI2_USERDEF_8BIT_DATA1,
+ /* DPCM decompression */
+ CSI2_USERDEF_8BIT_DATA1_DPCM10,
+ },
+ /* Output to both */
+ {
+ /* No DPCM decompression */
+ CSI2_PIX_FMT_RAW8_VP,
+ /* DPCM decompression */
+ CSI2_USERDEF_8BIT_DATA1_DPCM10_VP,
+ },
+ },
+ /* RAW8 formats */
+ {
+ /* Output to memory */
+ {
+ /* No DPCM decompression */
+ CSI2_PIX_FMT_RAW8,
+ /* DPCM decompression */
+ 0,
+ },
+ /* Output to both */
+ {
+ /* No DPCM decompression */
+ CSI2_PIX_FMT_RAW8_VP,
+ /* DPCM decompression */
+ 0,
+ },
+ },
+ /* YUV422 formats */
+ {
+ /* Output to memory */
+ {
+ /* No DPCM decompression */
+ CSI2_PIX_FMT_YUV422_8BIT,
+ /* DPCM decompression */
+ 0,
+ },
+ /* Output to both */
+ {
+ /* No DPCM decompression */
+ CSI2_PIX_FMT_YUV422_8BIT_VP16,
+ /* DPCM decompression */
+ 0,
+ },
+ },
+};
+
+/*
+ * csi2_ctx_map_format - Map CSI2 sink media bus format to CSI2 format ID
+ * @csi2: ISS CSI2 device
+ *
+ * Returns CSI2 physical format id
+ */
+static u16 csi2_ctx_map_format(struct iss_csi2_device *csi2)
+{
+ const struct v4l2_mbus_framefmt *fmt = &csi2->formats[CSI2_PAD_SINK];
+ int fmtidx, destidx;
+
+ 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_SBGGR8_1X8:
+ case V4L2_MBUS_FMT_SGBRG8_1X8:
+ case V4L2_MBUS_FMT_SGRBG8_1X8:
+ case V4L2_MBUS_FMT_SRGGB8_1X8:
+ fmtidx = 2;
+ break;
+ case V4L2_MBUS_FMT_UYVY8_1X16:
+ case V4L2_MBUS_FMT_YUYV8_1X16:
+ fmtidx = 3;
+ break;
+ default:
+ WARN(1, KERN_ERR "CSI2: pixel format %08x unsupported!\n",
+ fmt->code);
+ return 0;
+ }
+
+ if (!(csi2->output & CSI2_OUTPUT_IPIPEIF) &&
+ !(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 IPIPEIF.
+ */
+ destidx = csi2->frame_skip ? 0 : !!(csi2->output & CSI2_OUTPUT_IPIPEIF);
+
+ return __csi2_fmt_map[fmtidx][destidx][csi2->dpcm_decompress];
+}
+
+/*
+ * csi2_set_outaddr - Set memory address to save output image
+ * @csi2: Pointer to ISS CSI2a device.
+ * @addr: 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 iss_csi2_device *csi2, u32 addr)
+{
+ struct iss_csi2_ctx_cfg *ctx = &csi2->contexts[0];
+
+ ctx->ping_addr = addr;
+ ctx->pong_addr = addr;
+ writel(ctx->ping_addr,
+ csi2->regs1 + CSI2_CTX_PING_ADDR(ctx->ctxnum));
+ writel(ctx->pong_addr,
+ csi2->regs1 + CSI2_CTX_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 & 0xF0) == 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 iss_csi2_device *csi2, u8 ctxnum, u8 enable)
+{
+ struct iss_csi2_ctx_cfg *ctx = &csi2->contexts[ctxnum];
+ u32 reg;
+
+ reg = readl(csi2->regs1 + CSI2_CTX_CTRL1(ctxnum));
+
+ if (enable) {
+ unsigned int skip = 0;
+
+ if (csi2->frame_skip)
+ skip = csi2->frame_skip;
+ else if (csi2->output & CSI2_OUTPUT_MEMORY)
+ skip = 1;
+
+ reg &= ~CSI2_CTX_CTRL1_COUNT_MASK;
+ reg |= CSI2_CTX_CTRL1_COUNT_UNLOCK
+ | (skip << CSI2_CTX_CTRL1_COUNT_SHIFT)
+ | CSI2_CTX_CTRL1_CTX_EN;
+ } else {
+ reg &= ~CSI2_CTX_CTRL1_CTX_EN;
+ }
+
+ writel(reg, csi2->regs1 + CSI2_CTX_CTRL1(ctxnum));
+ ctx->enabled = enable;
+}
+
+/*
+ * csi2_ctx_config - CSI2 context configuration.
+ * @ctx: context configuration
+ *
+ */
+static void csi2_ctx_config(struct iss_csi2_device *csi2,
+ struct iss_csi2_ctx_cfg *ctx)
+{
+ u32 reg;
+
+ /* Set up CSI2_CTx_CTRL1 */
+ if (ctx->eof_enabled)
+ reg = CSI2_CTX_CTRL1_EOF_EN;
+
+ if (ctx->eol_enabled)
+ reg |= CSI2_CTX_CTRL1_EOL_EN;
+
+ if (ctx->checksum_enabled)
+ reg |= CSI2_CTX_CTRL1_CS_EN;
+
+ writel(reg, csi2->regs1 + CSI2_CTX_CTRL1(ctx->ctxnum));
+
+ /* Set up CSI2_CTx_CTRL2 */
+ reg = ctx->virtual_id << CSI2_CTX_CTRL2_VIRTUAL_ID_SHIFT;
+ reg |= ctx->format_id << CSI2_CTX_CTRL2_FORMAT_SHIFT;
+
+ if (ctx->dpcm_decompress && ctx->dpcm_predictor)
+ reg |= CSI2_CTX_CTRL2_DPCM_PRED;
+
+ if (is_usr_def_mapping(ctx->format_id))
+ reg |= 2 << CSI2_CTX_CTRL2_USER_DEF_MAP_SHIFT;
+
+ writel(reg, csi2->regs1 + CSI2_CTX_CTRL2(ctx->ctxnum));
+
+ /* Set up CSI2_CTx_CTRL3 */
+ writel(ctx->alpha << CSI2_CTX_CTRL3_ALPHA_SHIFT,
+ csi2->regs1 + CSI2_CTX_CTRL3(ctx->ctxnum));
+
+ /* Set up CSI2_CTx_DAT_OFST */
+ reg = readl(csi2->regs1 + CSI2_CTX_DAT_OFST(ctx->ctxnum));
+ reg &= ~CSI2_CTX_DAT_OFST_MASK;
+ reg |= ctx->data_offset;
+ writel(reg, csi2->regs1 + CSI2_CTX_DAT_OFST(ctx->ctxnum));
+
+ writel(ctx->ping_addr,
+ csi2->regs1 + CSI2_CTX_PING_ADDR(ctx->ctxnum));
+
+ writel(ctx->pong_addr,
+ csi2->regs1 + CSI2_CTX_PONG_ADDR(ctx->ctxnum));
+}
+
+/*
+ * csi2_timing_config - CSI2 timing configuration.
+ * @timing: csi2_timing_cfg structure
+ */
+static void csi2_timing_config(struct iss_csi2_device *csi2,
+ struct iss_csi2_timing_cfg *timing)
+{
+ u32 reg;
+
+ reg = readl(csi2->regs1 + CSI2_TIMING);
+
+ if (timing->force_rx_mode)
+ reg |= CSI2_TIMING_FORCE_RX_MODE_IO1;
+ else
+ reg &= ~CSI2_TIMING_FORCE_RX_MODE_IO1;
+
+ if (timing->stop_state_16x)
+ reg |= CSI2_TIMING_STOP_STATE_X16_IO1;
+ else
+ reg &= ~CSI2_TIMING_STOP_STATE_X16_IO1;
+
+ if (timing->stop_state_4x)
+ reg |= CSI2_TIMING_STOP_STATE_X4_IO1;
+ else
+ reg &= ~CSI2_TIMING_STOP_STATE_X4_IO1;
+
+ reg &= ~CSI2_TIMING_STOP_STATE_COUNTER_IO1_MASK;
+ reg |= timing->stop_state_counter <<
+ CSI2_TIMING_STOP_STATE_COUNTER_IO1_SHIFT;
+
+ writel(reg, csi2->regs1 + CSI2_TIMING);
+}
+
+/*
+ * csi2_irq_ctx_set - Enables CSI2 Context IRQs.
+ * @enable: Enable/disable CSI2 Context interrupts
+ */
+static void csi2_irq_ctx_set(struct iss_csi2_device *csi2, int enable)
+{
+ u32 reg = CSI2_CTX_IRQ_FE;
+ int i;
+
+ if (csi2->use_fs_irq)
+ reg |= CSI2_CTX_IRQ_FS;
+
+ for (i = 0; i < 8; i++) {
+ writel(reg, csi2->regs1 + CSI2_CTX_IRQSTATUS(i));
+ if (enable)
+ writel(readl(csi2->regs1 + CSI2_CTX_IRQENABLE(i)) | reg,
+ csi2->regs1 + CSI2_CTX_IRQENABLE(i));
+ else
+ writel(readl(csi2->regs1 + CSI2_CTX_IRQENABLE(i)) &
+ ~reg,
+ csi2->regs1 + CSI2_CTX_IRQENABLE(i));
+ }
+}
+
+/*
+ * csi2_irq_complexio1_set - Enables CSI2 ComplexIO IRQs.
+ * @enable: Enable/disable CSI2 ComplexIO #1 interrupts
+ */
+static void csi2_irq_complexio1_set(struct iss_csi2_device *csi2, int enable)
+{
+ u32 reg;
+ reg = CSI2_COMPLEXIO_IRQ_STATEALLULPMEXIT |
+ CSI2_COMPLEXIO_IRQ_STATEALLULPMENTER |
+ CSI2_COMPLEXIO_IRQ_STATEULPM5 |
+ CSI2_COMPLEXIO_IRQ_ERRCONTROL5 |
+ CSI2_COMPLEXIO_IRQ_ERRESC5 |
+ CSI2_COMPLEXIO_IRQ_ERRSOTSYNCHS5 |
+ CSI2_COMPLEXIO_IRQ_ERRSOTHS5 |
+ CSI2_COMPLEXIO_IRQ_STATEULPM4 |
+ CSI2_COMPLEXIO_IRQ_ERRCONTROL4 |
+ CSI2_COMPLEXIO_IRQ_ERRESC4 |
+ CSI2_COMPLEXIO_IRQ_ERRSOTSYNCHS4 |
+ CSI2_COMPLEXIO_IRQ_ERRSOTHS4 |
+ CSI2_COMPLEXIO_IRQ_STATEULPM3 |
+ CSI2_COMPLEXIO_IRQ_ERRCONTROL3 |
+ CSI2_COMPLEXIO_IRQ_ERRESC3 |
+ CSI2_COMPLEXIO_IRQ_ERRSOTSYNCHS3 |
+ CSI2_COMPLEXIO_IRQ_ERRSOTHS3 |
+ CSI2_COMPLEXIO_IRQ_STATEULPM2 |
+ CSI2_COMPLEXIO_IRQ_ERRCONTROL2 |
+ CSI2_COMPLEXIO_IRQ_ERRESC2 |
+ CSI2_COMPLEXIO_IRQ_ERRSOTSYNCHS2 |
+ CSI2_COMPLEXIO_IRQ_ERRSOTHS2 |
+ CSI2_COMPLEXIO_IRQ_STATEULPM1 |
+ CSI2_COMPLEXIO_IRQ_ERRCONTROL1 |
+ CSI2_COMPLEXIO_IRQ_ERRESC1 |
+ CSI2_COMPLEXIO_IRQ_ERRSOTSYNCHS1 |
+ CSI2_COMPLEXIO_IRQ_ERRSOTHS1;
+ writel(reg, csi2->regs1 + CSI2_COMPLEXIO_IRQSTATUS);
+ if (enable)
+ reg |= readl(csi2->regs1 + CSI2_COMPLEXIO_IRQENABLE);
+ else
+ reg = 0;
+ writel(reg, csi2->regs1 + CSI2_COMPLEXIO_IRQENABLE);
+}
+
+/*
+ * csi2_irq_status_set - Enables CSI2 Status IRQs.
+ * @enable: Enable/disable CSI2 Status interrupts
+ */
+static void csi2_irq_status_set(struct iss_csi2_device *csi2, int enable)
+{
+ u32 reg;
+ reg = CSI2_IRQ_OCP_ERR |
+ CSI2_IRQ_SHORT_PACKET |
+ CSI2_IRQ_ECC_CORRECTION |
+ CSI2_IRQ_ECC_NO_CORRECTION |
+ CSI2_IRQ_COMPLEXIO_ERR |
+ CSI2_IRQ_FIFO_OVF |
+ CSI2_IRQ_CONTEXT0;
+ writel(reg, csi2->regs1 + CSI2_IRQSTATUS);
+ if (enable)
+ reg |= readl(csi2->regs1 + CSI2_IRQENABLE);
+ else
+ reg = 0;
+
+ writel(reg, csi2->regs1 + CSI2_IRQENABLE);
+}
+
+/*
+ * omap4iss_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 omap4iss_csi2_reset(struct iss_csi2_device *csi2)
+{
+ u8 soft_reset_retries = 0;
+ u32 reg;
+ int i;
+
+ if (!csi2->available)
+ return -ENODEV;
+
+ if (csi2->phy->phy_in_use)
+ return -EBUSY;
+
+ writel(readl(csi2->regs1 + CSI2_SYSCONFIG) |
+ CSI2_SYSCONFIG_SOFT_RESET,
+ csi2->regs1 + CSI2_SYSCONFIG);
+
+ do {
+ reg = readl(csi2->regs1 + CSI2_SYSSTATUS) &
+ CSI2_SYSSTATUS_RESET_DONE;
+ if (reg == CSI2_SYSSTATUS_RESET_DONE)
+ break;
+ soft_reset_retries++;
+ if (soft_reset_retries < 5)
+ usleep_range(100, 100);
+ } while (soft_reset_retries < 5);
+
+ if (soft_reset_retries == 5) {
+ printk(KERN_ERR "CSI2: Soft reset try count exceeded!\n");
+ return -EBUSY;
+ }
+
+ writel(readl(csi2->regs1 + CSI2_COMPLEXIO_CFG) |
+ CSI2_COMPLEXIO_CFG_RESET_CTRL,
+ csi2->regs1 + CSI2_COMPLEXIO_CFG);
+
+ i = 100;
+ do {
+ reg = readl(csi2->phy->phy_regs + REGISTER1)
+ & REGISTER1_RESET_DONE_CTRLCLK;
+ if (reg == REGISTER1_RESET_DONE_CTRLCLK)
+ break;
+ usleep_range(100, 100);
+ } while (--i > 0);
+
+ if (i == 0) {
+ printk(KERN_ERR
+ "CSI2: Reset for CSI2_96M_FCLK domain Failed!\n");
+ return -EBUSY;
+ }
+
+ writel((readl(csi2->regs1 + CSI2_SYSCONFIG) &
+ ~(CSI2_SYSCONFIG_MSTANDBY_MODE_MASK |
+ CSI2_SYSCONFIG_AUTO_IDLE)) |
+ CSI2_SYSCONFIG_MSTANDBY_MODE_NO,
+ csi2->regs1 + CSI2_SYSCONFIG);
+
+ return 0;
+}
+
+static int csi2_configure(struct iss_csi2_device *csi2)
+{
+ const struct iss_v4l2_subdevs_group *pdata;
+ struct iss_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_pad(&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 = ISS_CSI2_FRAME_IMMEDIATE;
+ csi2->ctrl.ecc_enable = pdata->bus.csi2.crc;
+
+ 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(csi2, 1);
+ csi2_irq_ctx_set(csi2, 1);
+ csi2_irq_status_set(csi2, 1);
+
+ /* Set configuration (timings, format and links) */
+ csi2_timing_config(csi2, timing);
+ csi2_recv_config(csi2, &csi2->ctrl);
+ csi2_ctx_config(csi2, &csi2->contexts[0]);
+
+ return 0;
+}
+
+/*
+ * csi2_print_status - Prints CSI2 debug information.
+ */
+#define CSI2_PRINT_REGISTER(iss, regs, name)\
+ dev_dbg(iss->dev, "###CSI2 " #name "=0x%08x\n", \
+ readl(regs + CSI2_##name))
+
+static void csi2_print_status(struct iss_csi2_device *csi2)
+{
+ struct iss_device *iss = csi2->iss;
+
+ if (!csi2->available)
+ return;
+
+ dev_dbg(iss->dev, "-------------CSI2 Register dump-------------\n");
+
+ CSI2_PRINT_REGISTER(iss, csi2->regs1, SYSCONFIG);
+ CSI2_PRINT_REGISTER(iss, csi2->regs1, SYSSTATUS);
+ CSI2_PRINT_REGISTER(iss, csi2->regs1, IRQENABLE);
+ CSI2_PRINT_REGISTER(iss, csi2->regs1, IRQSTATUS);
+ CSI2_PRINT_REGISTER(iss, csi2->regs1, CTRL);
+ CSI2_PRINT_REGISTER(iss, csi2->regs1, DBG_H);
+ CSI2_PRINT_REGISTER(iss, csi2->regs1, COMPLEXIO_CFG);
+ CSI2_PRINT_REGISTER(iss, csi2->regs1, COMPLEXIO_IRQSTATUS);
+ CSI2_PRINT_REGISTER(iss, csi2->regs1, SHORT_PACKET);
+ CSI2_PRINT_REGISTER(iss, csi2->regs1, COMPLEXIO_IRQENABLE);
+ CSI2_PRINT_REGISTER(iss, csi2->regs1, DBG_P);
+ CSI2_PRINT_REGISTER(iss, csi2->regs1, TIMING);
+ CSI2_PRINT_REGISTER(iss, csi2->regs1, CTX_CTRL1(0));
+ CSI2_PRINT_REGISTER(iss, csi2->regs1, CTX_CTRL2(0));
+ CSI2_PRINT_REGISTER(iss, csi2->regs1, CTX_DAT_OFST(0));
+ CSI2_PRINT_REGISTER(iss, csi2->regs1, CTX_PING_ADDR(0));
+ CSI2_PRINT_REGISTER(iss, csi2->regs1, CTX_PONG_ADDR(0));
+ CSI2_PRINT_REGISTER(iss, csi2->regs1, CTX_IRQENABLE(0));
+ CSI2_PRINT_REGISTER(iss, csi2->regs1, CTX_IRQSTATUS(0));
+ CSI2_PRINT_REGISTER(iss, csi2->regs1, CTX_CTRL3(0));
+
+ dev_dbg(iss->dev, "--------------------------------------------\n");
+}
+
+/* -----------------------------------------------------------------------------
+ * Interrupt handling
+ */
+
+/*
+ * csi2_isr_buffer - Does buffer handling at end-of-frame
+ * when writing to memory.
+ */
+static void csi2_isr_buffer(struct iss_csi2_device *csi2)
+{
+ struct iss_buffer *buffer;
+
+ csi2_ctx_enable(csi2, 0, 0);
+
+ buffer = omap4iss_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->iss_addr);
+ csi2_ctx_enable(csi2, 0, 1);
+}
+
+static void csi2_isr_ctx(struct iss_csi2_device *csi2,
+ struct iss_csi2_ctx_cfg *ctx)
+{
+ unsigned int n = ctx->ctxnum;
+ u32 status;
+
+ status = readl(csi2->regs1 + CSI2_CTX_IRQSTATUS(n));
+ writel(status, csi2->regs1 + CSI2_CTX_IRQSTATUS(n));
+
+ /* Propagate frame number */
+ if (status & CSI2_CTX_IRQ_FS) {
+ struct iss_pipeline *pipe =
+ to_iss_pipeline(&csi2->subdev.entity);
+ if (pipe->do_propagation)
+ atomic_inc(&pipe->frame_number);
+ }
+
+ if (!(status & CSI2_CTX_IRQ_FE))
+ 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(csi2, ctx);
+ csi2_ctx_enable(csi2, n, 1);
+ }
+ return;
+ }
+
+ if (csi2->output & CSI2_OUTPUT_MEMORY)
+ csi2_isr_buffer(csi2);
+}
+
+/*
+ * omap4iss_csi2_isr - CSI2 interrupt handling.
+ */
+void omap4iss_csi2_isr(struct iss_csi2_device *csi2)
+{
+ struct iss_pipeline *pipe = to_iss_pipeline(&csi2->subdev.entity);
+ u32 csi2_irqstatus, cpxio1_irqstatus;
+ struct iss_device *iss = csi2->iss;
+
+ if (!csi2->available)
+ return;
+
+ csi2_irqstatus = readl(csi2->regs1 + CSI2_IRQSTATUS);
+ writel(csi2_irqstatus, csi2->regs1 + CSI2_IRQSTATUS);
+
+ /* Failure Cases */
+ if (csi2_irqstatus & CSI2_IRQ_COMPLEXIO_ERR) {
+ cpxio1_irqstatus = readl(csi2->regs1 +
+ CSI2_COMPLEXIO_IRQSTATUS);
+ writel(cpxio1_irqstatus,
+ csi2->regs1 + CSI2_COMPLEXIO_IRQSTATUS);
+ dev_dbg(iss->dev, "CSI2: ComplexIO Error IRQ "
+ "%x\n", cpxio1_irqstatus);
+ pipe->error = true;
+ }
+
+ if (csi2_irqstatus & (CSI2_IRQ_OCP_ERR |
+ CSI2_IRQ_SHORT_PACKET |
+ CSI2_IRQ_ECC_NO_CORRECTION |
+ CSI2_IRQ_COMPLEXIO_ERR |
+ CSI2_IRQ_FIFO_OVF)) {
+ dev_dbg(iss->dev, "CSI2 Err:"
+ " OCP:%d,"
+ " Short_pack:%d,"
+ " ECC:%d,"
+ " CPXIO:%d,"
+ " FIFO_OVF:%d,"
+ "\n",
+ (csi2_irqstatus &
+ CSI2_IRQ_OCP_ERR) ? 1 : 0,
+ (csi2_irqstatus &
+ CSI2_IRQ_SHORT_PACKET) ? 1 : 0,
+ (csi2_irqstatus &
+ CSI2_IRQ_ECC_NO_CORRECTION) ? 1 : 0,
+ (csi2_irqstatus &
+ CSI2_IRQ_COMPLEXIO_ERR) ? 1 : 0,
+ (csi2_irqstatus &
+ CSI2_IRQ_FIFO_OVF) ? 1 : 0);
+ pipe->error = true;
+ }
+
+ if (omap4iss_module_sync_is_stopping(&csi2->wait, &csi2->stopping))
+ return;
+
+ /* Successful cases */
+ if (csi2_irqstatus & CSI2_IRQ_CONTEXT0)
+ csi2_isr_ctx(csi2, &csi2->contexts[0]);
+
+ if (csi2_irqstatus & CSI2_IRQ_ECC_CORRECTION)
+ dev_dbg(iss->dev, "CSI2: ECC correction done\n");
+}
+
+/* -----------------------------------------------------------------------------
+ * ISS 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 iss_video *video, struct iss_buffer *buffer)
+{
+ struct iss_csi2_device *csi2 = container_of(video,
+ struct iss_csi2_device, video_out);
+
+ csi2_set_outaddr(csi2, buffer->iss_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 ISS_VIDEO_DMAQUEUE_UNDERRUN is still set.
+ * Enable it now.
+ */
+ if (csi2->video_out.dmaqueue_flags & ISS_VIDEO_DMAQUEUE_UNDERRUN) {
+ /* Enable / disable context 0 and IRQs */
+ csi2_if_enable(csi2, 1);
+ csi2_ctx_enable(csi2, 0, 1);
+ iss_video_dmaqueue_flags_clr(&csi2->video_out);
+ }
+
+ return 0;
+}
+
+static const struct iss_video_operations csi2_issvideo_ops = {
+ .queue = csi2_queue,
+};
+
+/* -----------------------------------------------------------------------------
+ * V4L2 subdev operations
+ */
+
+static struct v4l2_mbus_framefmt *
+__csi2_get_format(struct iss_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 iss_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 iss_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 = omap4iss_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 iss_csi2_device *csi2 = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *format;
+ const struct iss_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 = omap4iss_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 iss_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 iss_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 iss_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;
+}
+
+static int csi2_link_validate(struct v4l2_subdev *sd, struct media_link *link,
+ struct v4l2_subdev_format *source_fmt,
+ struct v4l2_subdev_format *sink_fmt)
+{
+ struct iss_csi2_device *csi2 = v4l2_get_subdevdata(sd);
+ struct iss_pipeline *pipe = to_iss_pipeline(&csi2->subdev.entity);
+ int rval;
+
+ pipe->external = media_entity_to_v4l2_subdev(link->source->entity);
+ rval = omap4iss_get_external_info(pipe, link);
+ if (rval < 0)
+ return rval;
+
+ return v4l2_subdev_link_validate_default(sd, link, source_fmt,
+ sink_fmt);
+}
+
+/*
+ * csi2_init_formats - Initialize formats on all pads
+ * @sd: ISS 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: ISS CSI2 V4L2 subdevice
+ * @enable: ISS 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 iss_csi2_device *csi2 = v4l2_get_subdevdata(sd);
+ struct iss_device *iss = csi2->iss;
+ struct iss_pipeline *pipe = to_iss_pipeline(&csi2->subdev.entity);
+ struct iss_video *video_out = &csi2->video_out;
+
+ if (csi2->state == ISS_PIPELINE_STREAM_STOPPED) {
+ if (enable == ISS_PIPELINE_STREAM_STOPPED)
+ return 0;
+
+ if (csi2 == &iss->csi2a)
+ omap4iss_subclk_enable(iss, OMAP4_ISS_SUBCLK_CSI2_A);
+ else if (csi2 == &iss->csi2b)
+ omap4iss_subclk_enable(iss, OMAP4_ISS_SUBCLK_CSI2_B);
+ }
+
+ switch (enable) {
+ case ISS_PIPELINE_STREAM_CONTINUOUS: {
+ int ret;
+
+ ret = omap4iss_csiphy_config(iss, sd);
+ if (ret < 0)
+ return ret;
+
+ if (omap4iss_csiphy_acquire(csi2->phy) < 0)
+ return -ENODEV;
+ csi2->use_fs_irq = pipe->do_propagation;
+ 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
+ * ISS_VIDEO_DMAQUEUE_QUEUED will be set as soon as there is
+ * a buffer available.
+ */
+ if (csi2->output & CSI2_OUTPUT_MEMORY &&
+ !(video_out->dmaqueue_flags & ISS_VIDEO_DMAQUEUE_QUEUED))
+ break;
+ /* Enable context 0 and IRQs */
+ atomic_set(&csi2->stopping, 0);
+ csi2_ctx_enable(csi2, 0, 1);
+ csi2_if_enable(csi2, 1);
+ iss_video_dmaqueue_flags_clr(video_out);
+ break;
+ }
+ case ISS_PIPELINE_STREAM_STOPPED:
+ if (csi2->state == ISS_PIPELINE_STREAM_STOPPED)
+ return 0;
+ if (omap4iss_module_sync_idle(&sd->entity, &csi2->wait,
+ &csi2->stopping))
+ dev_dbg(iss->dev, "%s: module stop timeout.\n",
+ sd->name);
+ csi2_ctx_enable(csi2, 0, 0);
+ csi2_if_enable(csi2, 0);
+ csi2_irq_ctx_set(csi2, 0);
+ omap4iss_csiphy_release(csi2->phy);
+ if (csi2 == &iss->csi2a)
+ omap4iss_subclk_disable(iss, OMAP4_ISS_SUBCLK_CSI2_A);
+ else if (csi2 == &iss->csi2b)
+ omap4iss_subclk_disable(iss, OMAP4_ISS_SUBCLK_CSI2_B);
+ iss_video_dmaqueue_flags_clr(video_out);
+ 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,
+ .link_validate = csi2_link_validate,
+};
+
+/* 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 iss_csi2_device *csi2 = v4l2_get_subdevdata(sd);
+ struct iss_csi2_ctrl_cfg *ctrl = &csi2->ctrl;
+
+ /*
+ * The ISS 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_IPIPEIF)
+ return -EBUSY;
+ csi2->output |= CSI2_OUTPUT_IPIPEIF;
+ } else {
+ csi2->output &= ~CSI2_OUTPUT_IPIPEIF;
+ }
+ 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_IPIPEIF);
+
+ 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 omap4iss_csi2_unregister_entities(struct iss_csi2_device *csi2)
+{
+ v4l2_device_unregister_subdev(&csi2->subdev);
+ omap4iss_video_unregister(&csi2->video_out);
+}
+
+int omap4iss_csi2_register_entities(struct iss_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 = omap4iss_video_register(&csi2->video_out, vdev);
+ if (ret < 0)
+ goto error;
+
+ return 0;
+
+error:
+ omap4iss_csi2_unregister_entities(csi2);
+ return ret;
+}
+
+/* -----------------------------------------------------------------------------
+ * ISS 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 iss_csi2_device *csi2, const char *subname)
+{
+ struct v4l2_subdev *sd = &csi2->subdev;
+ struct media_pad *pads = csi2->pads;
+ struct media_entity *me = &sd->entity;
+ int ret;
+ char name[V4L2_SUBDEV_NAME_SIZE];
+
+ v4l2_subdev_init(sd, &csi2_ops);
+ sd->internal_ops = &csi2_internal_ops;
+ sprintf(name, "CSI2%s", subname);
+ strlcpy(sd->name, "", sizeof(sd->name));
+ sprintf(sd->name, "OMAP4 ISS %s", name);
+
+ sd->grp_id = 1 << 16; /* group ID for iss 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_issvideo_ops;
+ csi2->video_out.bpl_alignment = 32;
+ csi2->video_out.bpl_zero_padding = 1;
+ csi2->video_out.bpl_max = 0x1ffe0;
+ csi2->video_out.iss = csi2->iss;
+ csi2->video_out.capture_mem = PAGE_ALIGN(4096 * 4096) * 3;
+
+ ret = omap4iss_video_init(&csi2->video_out, name);
+ 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:
+ omap4iss_video_cleanup(&csi2->video_out);
+error_video:
+ media_entity_cleanup(&csi2->subdev.entity);
+ return ret;
+}
+
+/*
+ * omap4iss_csi2_init - Routine for module driver init
+ */
+int omap4iss_csi2_init(struct iss_device *iss)
+{
+ struct iss_csi2_device *csi2a = &iss->csi2a;
+ struct iss_csi2_device *csi2b = &iss->csi2b;
+ int ret;
+
+ csi2a->iss = iss;
+ csi2a->available = 1;
+ csi2a->regs1 = iss->regs[OMAP4_ISS_MEM_CSI2_A_REGS1];
+ csi2a->phy = &iss->csiphy1;
+ csi2a->state = ISS_PIPELINE_STREAM_STOPPED;
+ init_waitqueue_head(&csi2a->wait);
+
+ ret = csi2_init_entities(csi2a, "a");
+ if (ret < 0)
+ return ret;
+
+ csi2b->iss = iss;
+ csi2b->available = 1;
+ csi2b->regs1 = iss->regs[OMAP4_ISS_MEM_CSI2_B_REGS1];
+ csi2b->phy = &iss->csiphy2;
+ csi2b->state = ISS_PIPELINE_STREAM_STOPPED;
+ init_waitqueue_head(&csi2b->wait);
+
+ ret = csi2_init_entities(csi2b, "b");
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+/*
+ * omap4iss_csi2_cleanup - Routine for module driver cleanup
+ */
+void omap4iss_csi2_cleanup(struct iss_device *iss)
+{
+ struct iss_csi2_device *csi2a = &iss->csi2a;
+ struct iss_csi2_device *csi2b = &iss->csi2b;
+
+ omap4iss_video_cleanup(&csi2a->video_out);
+ media_entity_cleanup(&csi2a->subdev.entity);
+
+ omap4iss_video_cleanup(&csi2b->video_out);
+ media_entity_cleanup(&csi2b->subdev.entity);
+}
projects / mirror_ubuntu-eoan-kernel.git / commitdiff