--- /dev/null
- freq = v4l2_get_link_rate(q->sensor->ctrl_handler, bpp, lanes);
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2017,2020 Intel Corporation
+ *
+ * Based partially on Intel IPU4 driver written by
+ * Sakari Ailus <sakari.ailus@linux.intel.com>
+ * Samu Onkalo <samu.onkalo@intel.com>
+ * Jouni Högander <jouni.hogander@intel.com>
+ * Jouni Ukkonen <jouni.ukkonen@intel.com>
+ * Antti Laakso <antti.laakso@intel.com>
+ * et al.
+ */
+
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/iopoll.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/pfn.h>
+#include <linux/pm_runtime.h>
+#include <linux/property.h>
+#include <linux/vmalloc.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-dma-sg.h>
+
+#include "ipu3-cio2.h"
+
+struct ipu3_cio2_fmt {
+ u32 mbus_code;
+ u32 fourcc;
+ u8 mipicode;
+ u8 bpp;
+};
+
+/*
+ * These are raw formats used in Intel's third generation of
+ * Image Processing Unit known as IPU3.
+ * 10bit raw bayer packed, 32 bytes for every 25 pixels,
+ * last LSB 6 bits unused.
+ */
+static const struct ipu3_cio2_fmt formats[] = {
+ { /* put default entry at beginning */
+ .mbus_code = MEDIA_BUS_FMT_SGRBG10_1X10,
+ .fourcc = V4L2_PIX_FMT_IPU3_SGRBG10,
+ .mipicode = 0x2b,
+ .bpp = 10,
+ }, {
+ .mbus_code = MEDIA_BUS_FMT_SGBRG10_1X10,
+ .fourcc = V4L2_PIX_FMT_IPU3_SGBRG10,
+ .mipicode = 0x2b,
+ .bpp = 10,
+ }, {
+ .mbus_code = MEDIA_BUS_FMT_SBGGR10_1X10,
+ .fourcc = V4L2_PIX_FMT_IPU3_SBGGR10,
+ .mipicode = 0x2b,
+ .bpp = 10,
+ }, {
+ .mbus_code = MEDIA_BUS_FMT_SRGGB10_1X10,
+ .fourcc = V4L2_PIX_FMT_IPU3_SRGGB10,
+ .mipicode = 0x2b,
+ .bpp = 10,
+ },
+};
+
+/*
+ * cio2_find_format - lookup color format by fourcc or/and media bus code
+ * @pixelformat: fourcc to match, ignored if null
+ * @mbus_code: media bus code to match, ignored if null
+ */
+static const struct ipu3_cio2_fmt *cio2_find_format(const u32 *pixelformat,
+ const u32 *mbus_code)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(formats); i++) {
+ if (pixelformat && *pixelformat != formats[i].fourcc)
+ continue;
+ if (mbus_code && *mbus_code != formats[i].mbus_code)
+ continue;
+
+ return &formats[i];
+ }
+
+ return NULL;
+}
+
+static inline u32 cio2_bytesperline(const unsigned int width)
+{
+ /*
+ * 64 bytes for every 50 pixels, the line length
+ * in bytes is multiple of 64 (line end alignment).
+ */
+ return DIV_ROUND_UP(width, 50) * 64;
+}
+
+/**************** FBPT operations ****************/
+
+static void cio2_fbpt_exit_dummy(struct cio2_device *cio2)
+{
+ if (cio2->dummy_lop) {
+ dma_free_coherent(&cio2->pci_dev->dev, PAGE_SIZE,
+ cio2->dummy_lop, cio2->dummy_lop_bus_addr);
+ cio2->dummy_lop = NULL;
+ }
+ if (cio2->dummy_page) {
+ dma_free_coherent(&cio2->pci_dev->dev, PAGE_SIZE,
+ cio2->dummy_page, cio2->dummy_page_bus_addr);
+ cio2->dummy_page = NULL;
+ }
+}
+
+static int cio2_fbpt_init_dummy(struct cio2_device *cio2)
+{
+ unsigned int i;
+
+ cio2->dummy_page = dma_alloc_coherent(&cio2->pci_dev->dev, PAGE_SIZE,
+ &cio2->dummy_page_bus_addr,
+ GFP_KERNEL);
+ cio2->dummy_lop = dma_alloc_coherent(&cio2->pci_dev->dev, PAGE_SIZE,
+ &cio2->dummy_lop_bus_addr,
+ GFP_KERNEL);
+ if (!cio2->dummy_page || !cio2->dummy_lop) {
+ cio2_fbpt_exit_dummy(cio2);
+ return -ENOMEM;
+ }
+ /*
+ * List of Pointers(LOP) contains 1024x32b pointers to 4KB page each
+ * Initialize each entry to dummy_page bus base address.
+ */
+ for (i = 0; i < CIO2_LOP_ENTRIES; i++)
+ cio2->dummy_lop[i] = PFN_DOWN(cio2->dummy_page_bus_addr);
+
+ return 0;
+}
+
+static void cio2_fbpt_entry_enable(struct cio2_device *cio2,
+ struct cio2_fbpt_entry entry[CIO2_MAX_LOPS])
+{
+ /*
+ * The CPU first initializes some fields in fbpt, then sets
+ * the VALID bit, this barrier is to ensure that the DMA(device)
+ * does not see the VALID bit enabled before other fields are
+ * initialized; otherwise it could lead to havoc.
+ */
+ dma_wmb();
+
+ /*
+ * Request interrupts for start and completion
+ * Valid bit is applicable only to 1st entry
+ */
+ entry[0].first_entry.ctrl = CIO2_FBPT_CTRL_VALID |
+ CIO2_FBPT_CTRL_IOC | CIO2_FBPT_CTRL_IOS;
+}
+
+/* Initialize fpbt entries to point to dummy frame */
+static void cio2_fbpt_entry_init_dummy(struct cio2_device *cio2,
+ struct cio2_fbpt_entry
+ entry[CIO2_MAX_LOPS])
+{
+ unsigned int i;
+
+ entry[0].first_entry.first_page_offset = 0;
+ entry[1].second_entry.num_of_pages = CIO2_LOP_ENTRIES * CIO2_MAX_LOPS;
+ entry[1].second_entry.last_page_available_bytes = PAGE_SIZE - 1;
+
+ for (i = 0; i < CIO2_MAX_LOPS; i++)
+ entry[i].lop_page_addr = PFN_DOWN(cio2->dummy_lop_bus_addr);
+
+ cio2_fbpt_entry_enable(cio2, entry);
+}
+
+/* Initialize fpbt entries to point to a given buffer */
+static void cio2_fbpt_entry_init_buf(struct cio2_device *cio2,
+ struct cio2_buffer *b,
+ struct cio2_fbpt_entry
+ entry[CIO2_MAX_LOPS])
+{
+ struct vb2_buffer *vb = &b->vbb.vb2_buf;
+ unsigned int length = vb->planes[0].length;
+ int remaining, i;
+
+ entry[0].first_entry.first_page_offset = b->offset;
+ remaining = length + entry[0].first_entry.first_page_offset;
+ entry[1].second_entry.num_of_pages = PFN_UP(remaining);
+ /*
+ * last_page_available_bytes has the offset of the last byte in the
+ * last page which is still accessible by DMA. DMA cannot access
+ * beyond this point. Valid range for this is from 0 to 4095.
+ * 0 indicates 1st byte in the page is DMA accessible.
+ * 4095 (PAGE_SIZE - 1) means every single byte in the last page
+ * is available for DMA transfer.
+ */
+ remaining = offset_in_page(remaining) ?: PAGE_SIZE;
+ entry[1].second_entry.last_page_available_bytes = remaining - 1;
+ /* Fill FBPT */
+ remaining = length;
+ i = 0;
+ while (remaining > 0) {
+ entry->lop_page_addr = PFN_DOWN(b->lop_bus_addr[i]);
+ remaining -= CIO2_LOP_ENTRIES * PAGE_SIZE;
+ entry++;
+ i++;
+ }
+
+ /*
+ * The first not meaningful FBPT entry should point to a valid LOP
+ */
+ entry->lop_page_addr = PFN_DOWN(cio2->dummy_lop_bus_addr);
+
+ cio2_fbpt_entry_enable(cio2, entry);
+}
+
+static int cio2_fbpt_init(struct cio2_device *cio2, struct cio2_queue *q)
+{
+ struct device *dev = &cio2->pci_dev->dev;
+
+ q->fbpt = dma_alloc_coherent(dev, CIO2_FBPT_SIZE, &q->fbpt_bus_addr,
+ GFP_KERNEL);
+ if (!q->fbpt)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void cio2_fbpt_exit(struct cio2_queue *q, struct device *dev)
+{
+ dma_free_coherent(dev, CIO2_FBPT_SIZE, q->fbpt, q->fbpt_bus_addr);
+}
+
+/**************** CSI2 hardware setup ****************/
+
+/*
+ * The CSI2 receiver has several parameters affecting
+ * the receiver timings. These depend on the MIPI bus frequency
+ * F in Hz (sensor transmitter rate) as follows:
+ * register value = (A/1e9 + B * UI) / COUNT_ACC
+ * where
+ * UI = 1 / (2 * F) in seconds
+ * COUNT_ACC = counter accuracy in seconds
+ * For IPU3 COUNT_ACC = 0.0625
+ *
+ * A and B are coefficients from the table below,
+ * depending whether the register minimum or maximum value is
+ * calculated.
+ * Minimum Maximum
+ * Clock lane A B A B
+ * reg_rx_csi_dly_cnt_termen_clane 0 0 38 0
+ * reg_rx_csi_dly_cnt_settle_clane 95 -8 300 -16
+ * Data lanes
+ * reg_rx_csi_dly_cnt_termen_dlane0 0 0 35 4
+ * reg_rx_csi_dly_cnt_settle_dlane0 85 -2 145 -6
+ * reg_rx_csi_dly_cnt_termen_dlane1 0 0 35 4
+ * reg_rx_csi_dly_cnt_settle_dlane1 85 -2 145 -6
+ * reg_rx_csi_dly_cnt_termen_dlane2 0 0 35 4
+ * reg_rx_csi_dly_cnt_settle_dlane2 85 -2 145 -6
+ * reg_rx_csi_dly_cnt_termen_dlane3 0 0 35 4
+ * reg_rx_csi_dly_cnt_settle_dlane3 85 -2 145 -6
+ *
+ * We use the minimum values of both A and B.
+ */
+
+/*
+ * shift for keeping value range suitable for 32-bit integer arithmetic
+ */
+#define LIMIT_SHIFT 8
+
+static s32 cio2_rx_timing(s32 a, s32 b, s64 freq, int def)
+{
+ const u32 accinv = 16; /* invert of counter resolution */
+ const u32 uiinv = 500000000; /* 1e9 / 2 */
+ s32 r;
+
+ freq >>= LIMIT_SHIFT;
+
+ if (WARN_ON(freq <= 0 || freq > S32_MAX))
+ return def;
+ /*
+ * b could be 0, -2 or -8, so |accinv * b| is always
+ * less than (1 << ds) and thus |r| < 500000000.
+ */
+ r = accinv * b * (uiinv >> LIMIT_SHIFT);
+ r = r / (s32)freq;
+ /* max value of a is 95 */
+ r += accinv * a;
+
+ return r;
+};
+
+/* Calculate the delay value for termination enable of clock lane HS Rx */
+static int cio2_csi2_calc_timing(struct cio2_device *cio2, struct cio2_queue *q,
+ struct cio2_csi2_timing *timing,
+ unsigned int bpp, unsigned int lanes)
+{
+ struct device *dev = &cio2->pci_dev->dev;
+ s64 freq;
+
+ if (!q->sensor)
+ return -ENODEV;
+
++ freq = v4l2_get_link_freq(q->sensor->ctrl_handler, bpp, lanes);
+ if (freq < 0) {
+ dev_err(dev, "error %lld, invalid link_freq\n", freq);
+ return freq;
+ }
+
+ timing->clk_termen = cio2_rx_timing(CIO2_CSIRX_DLY_CNT_TERMEN_CLANE_A,
+ CIO2_CSIRX_DLY_CNT_TERMEN_CLANE_B,
+ freq,
+ CIO2_CSIRX_DLY_CNT_TERMEN_DEFAULT);
+ timing->clk_settle = cio2_rx_timing(CIO2_CSIRX_DLY_CNT_SETTLE_CLANE_A,
+ CIO2_CSIRX_DLY_CNT_SETTLE_CLANE_B,
+ freq,
+ CIO2_CSIRX_DLY_CNT_SETTLE_DEFAULT);
+ timing->dat_termen = cio2_rx_timing(CIO2_CSIRX_DLY_CNT_TERMEN_DLANE_A,
+ CIO2_CSIRX_DLY_CNT_TERMEN_DLANE_B,
+ freq,
+ CIO2_CSIRX_DLY_CNT_TERMEN_DEFAULT);
+ timing->dat_settle = cio2_rx_timing(CIO2_CSIRX_DLY_CNT_SETTLE_DLANE_A,
+ CIO2_CSIRX_DLY_CNT_SETTLE_DLANE_B,
+ freq,
+ CIO2_CSIRX_DLY_CNT_SETTLE_DEFAULT);
+
+ dev_dbg(dev, "freq ct value is %d\n", timing->clk_termen);
+ dev_dbg(dev, "freq cs value is %d\n", timing->clk_settle);
+ dev_dbg(dev, "freq dt value is %d\n", timing->dat_termen);
+ dev_dbg(dev, "freq ds value is %d\n", timing->dat_settle);
+
+ return 0;
+};
+
+static int cio2_hw_init(struct cio2_device *cio2, struct cio2_queue *q)
+{
+ static const int NUM_VCS = 4;
+ static const int SID; /* Stream id */
+ static const int ENTRY;
+ static const int FBPT_WIDTH = DIV_ROUND_UP(CIO2_MAX_LOPS,
+ CIO2_FBPT_SUBENTRY_UNIT);
+ const u32 num_buffers1 = CIO2_MAX_BUFFERS - 1;
+ const struct ipu3_cio2_fmt *fmt;
+ void __iomem *const base = cio2->base;
+ u8 lanes, csi2bus = q->csi2.port;
+ u8 sensor_vc = SENSOR_VIR_CH_DFLT;
+ struct cio2_csi2_timing timing;
+ int i, r;
+
+ fmt = cio2_find_format(NULL, &q->subdev_fmt.code);
+ if (!fmt)
+ return -EINVAL;
+
+ lanes = q->csi2.lanes;
+
+ r = cio2_csi2_calc_timing(cio2, q, &timing, fmt->bpp, lanes);
+ if (r)
+ return r;
+
+ writel(timing.clk_termen, q->csi_rx_base +
+ CIO2_REG_CSIRX_DLY_CNT_TERMEN(CIO2_CSIRX_DLY_CNT_CLANE_IDX));
+ writel(timing.clk_settle, q->csi_rx_base +
+ CIO2_REG_CSIRX_DLY_CNT_SETTLE(CIO2_CSIRX_DLY_CNT_CLANE_IDX));
+
+ for (i = 0; i < lanes; i++) {
+ writel(timing.dat_termen, q->csi_rx_base +
+ CIO2_REG_CSIRX_DLY_CNT_TERMEN(i));
+ writel(timing.dat_settle, q->csi_rx_base +
+ CIO2_REG_CSIRX_DLY_CNT_SETTLE(i));
+ }
+
+ writel(CIO2_PBM_WMCTRL1_MIN_2CK |
+ CIO2_PBM_WMCTRL1_MID1_2CK |
+ CIO2_PBM_WMCTRL1_MID2_2CK, base + CIO2_REG_PBM_WMCTRL1);
+ writel(CIO2_PBM_WMCTRL2_HWM_2CK << CIO2_PBM_WMCTRL2_HWM_2CK_SHIFT |
+ CIO2_PBM_WMCTRL2_LWM_2CK << CIO2_PBM_WMCTRL2_LWM_2CK_SHIFT |
+ CIO2_PBM_WMCTRL2_OBFFWM_2CK <<
+ CIO2_PBM_WMCTRL2_OBFFWM_2CK_SHIFT |
+ CIO2_PBM_WMCTRL2_TRANSDYN << CIO2_PBM_WMCTRL2_TRANSDYN_SHIFT |
+ CIO2_PBM_WMCTRL2_OBFF_MEM_EN, base + CIO2_REG_PBM_WMCTRL2);
+ writel(CIO2_PBM_ARB_CTRL_LANES_DIV <<
+ CIO2_PBM_ARB_CTRL_LANES_DIV_SHIFT |
+ CIO2_PBM_ARB_CTRL_LE_EN |
+ CIO2_PBM_ARB_CTRL_PLL_POST_SHTDN <<
+ CIO2_PBM_ARB_CTRL_PLL_POST_SHTDN_SHIFT |
+ CIO2_PBM_ARB_CTRL_PLL_AHD_WK_UP <<
+ CIO2_PBM_ARB_CTRL_PLL_AHD_WK_UP_SHIFT,
+ base + CIO2_REG_PBM_ARB_CTRL);
+ writel(CIO2_CSIRX_STATUS_DLANE_HS_MASK,
+ q->csi_rx_base + CIO2_REG_CSIRX_STATUS_DLANE_HS);
+ writel(CIO2_CSIRX_STATUS_DLANE_LP_MASK,
+ q->csi_rx_base + CIO2_REG_CSIRX_STATUS_DLANE_LP);
+
+ writel(CIO2_FB_HPLL_FREQ, base + CIO2_REG_FB_HPLL_FREQ);
+ writel(CIO2_ISCLK_RATIO, base + CIO2_REG_ISCLK_RATIO);
+
+ /* Configure MIPI backend */
+ for (i = 0; i < NUM_VCS; i++)
+ writel(1, q->csi_rx_base + CIO2_REG_MIPIBE_SP_LUT_ENTRY(i));
+
+ /* There are 16 short packet LUT entry */
+ for (i = 0; i < 16; i++)
+ writel(CIO2_MIPIBE_LP_LUT_ENTRY_DISREGARD,
+ q->csi_rx_base + CIO2_REG_MIPIBE_LP_LUT_ENTRY(i));
+ writel(CIO2_MIPIBE_GLOBAL_LUT_DISREGARD,
+ q->csi_rx_base + CIO2_REG_MIPIBE_GLOBAL_LUT_DISREGARD);
+
+ writel(CIO2_INT_EN_EXT_IE_MASK, base + CIO2_REG_INT_EN_EXT_IE);
+ writel(CIO2_IRQCTRL_MASK, q->csi_rx_base + CIO2_REG_IRQCTRL_MASK);
+ writel(CIO2_IRQCTRL_MASK, q->csi_rx_base + CIO2_REG_IRQCTRL_ENABLE);
+ writel(0, q->csi_rx_base + CIO2_REG_IRQCTRL_EDGE);
+ writel(0, q->csi_rx_base + CIO2_REG_IRQCTRL_LEVEL_NOT_PULSE);
+ writel(CIO2_INT_EN_EXT_OE_MASK, base + CIO2_REG_INT_EN_EXT_OE);
+
+ writel(CIO2_REG_INT_EN_IRQ | CIO2_INT_IOC(CIO2_DMA_CHAN) |
+ CIO2_REG_INT_EN_IOS(CIO2_DMA_CHAN),
+ base + CIO2_REG_INT_EN);
+
+ writel((CIO2_PXM_PXF_FMT_CFG_BPP_10 | CIO2_PXM_PXF_FMT_CFG_PCK_64B)
+ << CIO2_PXM_PXF_FMT_CFG_SID0_SHIFT,
+ base + CIO2_REG_PXM_PXF_FMT_CFG0(csi2bus));
+ writel(SID << CIO2_MIPIBE_LP_LUT_ENTRY_SID_SHIFT |
+ sensor_vc << CIO2_MIPIBE_LP_LUT_ENTRY_VC_SHIFT |
+ fmt->mipicode << CIO2_MIPIBE_LP_LUT_ENTRY_FORMAT_TYPE_SHIFT,
+ q->csi_rx_base + CIO2_REG_MIPIBE_LP_LUT_ENTRY(ENTRY));
+ writel(0, q->csi_rx_base + CIO2_REG_MIPIBE_COMP_FORMAT(sensor_vc));
+ writel(0, q->csi_rx_base + CIO2_REG_MIPIBE_FORCE_RAW8);
+ writel(0, base + CIO2_REG_PXM_SID2BID0(csi2bus));
+
+ writel(lanes, q->csi_rx_base + CIO2_REG_CSIRX_NOF_ENABLED_LANES);
+ writel(CIO2_CGC_PRIM_TGE |
+ CIO2_CGC_SIDE_TGE |
+ CIO2_CGC_XOSC_TGE |
+ CIO2_CGC_D3I3_TGE |
+ CIO2_CGC_CSI2_INTERFRAME_TGE |
+ CIO2_CGC_CSI2_PORT_DCGE |
+ CIO2_CGC_SIDE_DCGE |
+ CIO2_CGC_PRIM_DCGE |
+ CIO2_CGC_ROSC_DCGE |
+ CIO2_CGC_XOSC_DCGE |
+ CIO2_CGC_CLKGATE_HOLDOFF << CIO2_CGC_CLKGATE_HOLDOFF_SHIFT |
+ CIO2_CGC_CSI_CLKGATE_HOLDOFF
+ << CIO2_CGC_CSI_CLKGATE_HOLDOFF_SHIFT, base + CIO2_REG_CGC);
+ writel(CIO2_LTRCTRL_LTRDYNEN, base + CIO2_REG_LTRCTRL);
+ writel(CIO2_LTRVAL0_VAL << CIO2_LTRVAL02_VAL_SHIFT |
+ CIO2_LTRVAL0_SCALE << CIO2_LTRVAL02_SCALE_SHIFT |
+ CIO2_LTRVAL1_VAL << CIO2_LTRVAL13_VAL_SHIFT |
+ CIO2_LTRVAL1_SCALE << CIO2_LTRVAL13_SCALE_SHIFT,
+ base + CIO2_REG_LTRVAL01);
+ writel(CIO2_LTRVAL2_VAL << CIO2_LTRVAL02_VAL_SHIFT |
+ CIO2_LTRVAL2_SCALE << CIO2_LTRVAL02_SCALE_SHIFT |
+ CIO2_LTRVAL3_VAL << CIO2_LTRVAL13_VAL_SHIFT |
+ CIO2_LTRVAL3_SCALE << CIO2_LTRVAL13_SCALE_SHIFT,
+ base + CIO2_REG_LTRVAL23);
+
+ for (i = 0; i < CIO2_NUM_DMA_CHAN; i++) {
+ writel(0, base + CIO2_REG_CDMABA(i));
+ writel(0, base + CIO2_REG_CDMAC0(i));
+ writel(0, base + CIO2_REG_CDMAC1(i));
+ }
+
+ /* Enable DMA */
+ writel(PFN_DOWN(q->fbpt_bus_addr), base + CIO2_REG_CDMABA(CIO2_DMA_CHAN));
+
+ writel(num_buffers1 << CIO2_CDMAC0_FBPT_LEN_SHIFT |
+ FBPT_WIDTH << CIO2_CDMAC0_FBPT_WIDTH_SHIFT |
+ CIO2_CDMAC0_DMA_INTR_ON_FE |
+ CIO2_CDMAC0_FBPT_UPDATE_FIFO_FULL |
+ CIO2_CDMAC0_DMA_EN |
+ CIO2_CDMAC0_DMA_INTR_ON_FS |
+ CIO2_CDMAC0_DMA_HALTED, base + CIO2_REG_CDMAC0(CIO2_DMA_CHAN));
+
+ writel(1 << CIO2_CDMAC1_LINENUMUPDATE_SHIFT,
+ base + CIO2_REG_CDMAC1(CIO2_DMA_CHAN));
+
+ writel(0, base + CIO2_REG_PBM_FOPN_ABORT);
+
+ writel(CIO2_PXM_FRF_CFG_CRC_TH << CIO2_PXM_FRF_CFG_CRC_TH_SHIFT |
+ CIO2_PXM_FRF_CFG_MSK_ECC_DPHY_NR |
+ CIO2_PXM_FRF_CFG_MSK_ECC_RE |
+ CIO2_PXM_FRF_CFG_MSK_ECC_DPHY_NE,
+ base + CIO2_REG_PXM_FRF_CFG(q->csi2.port));
+
+ /* Clear interrupts */
+ writel(CIO2_IRQCTRL_MASK, q->csi_rx_base + CIO2_REG_IRQCTRL_CLEAR);
+ writel(~0, base + CIO2_REG_INT_STS_EXT_OE);
+ writel(~0, base + CIO2_REG_INT_STS_EXT_IE);
+ writel(~0, base + CIO2_REG_INT_STS);
+
+ /* Enable devices, starting from the last device in the pipe */
+ writel(1, q->csi_rx_base + CIO2_REG_MIPIBE_ENABLE);
+ writel(1, q->csi_rx_base + CIO2_REG_CSIRX_ENABLE);
+
+ return 0;
+}
+
+static void cio2_hw_exit(struct cio2_device *cio2, struct cio2_queue *q)
+{
+ void __iomem *const base = cio2->base;
+ unsigned int i;
+ u32 value;
+ int ret;
+
+ /* Disable CSI receiver and MIPI backend devices */
+ writel(0, q->csi_rx_base + CIO2_REG_IRQCTRL_MASK);
+ writel(0, q->csi_rx_base + CIO2_REG_IRQCTRL_ENABLE);
+ writel(0, q->csi_rx_base + CIO2_REG_CSIRX_ENABLE);
+ writel(0, q->csi_rx_base + CIO2_REG_MIPIBE_ENABLE);
+
+ /* Halt DMA */
+ writel(0, base + CIO2_REG_CDMAC0(CIO2_DMA_CHAN));
+ ret = readl_poll_timeout(base + CIO2_REG_CDMAC0(CIO2_DMA_CHAN),
+ value, value & CIO2_CDMAC0_DMA_HALTED,
+ 4000, 2000000);
+ if (ret)
+ dev_err(&cio2->pci_dev->dev,
+ "DMA %i can not be halted\n", CIO2_DMA_CHAN);
+
+ for (i = 0; i < CIO2_NUM_PORTS; i++) {
+ writel(readl(base + CIO2_REG_PXM_FRF_CFG(i)) |
+ CIO2_PXM_FRF_CFG_ABORT, base + CIO2_REG_PXM_FRF_CFG(i));
+ writel(readl(base + CIO2_REG_PBM_FOPN_ABORT) |
+ CIO2_PBM_FOPN_ABORT(i), base + CIO2_REG_PBM_FOPN_ABORT);
+ }
+}
+
+static void cio2_buffer_done(struct cio2_device *cio2, unsigned int dma_chan)
+{
+ struct device *dev = &cio2->pci_dev->dev;
+ struct cio2_queue *q = cio2->cur_queue;
+ struct cio2_fbpt_entry *entry;
+ u64 ns = ktime_get_ns();
+
+ if (dma_chan >= CIO2_QUEUES) {
+ dev_err(dev, "bad DMA channel %i\n", dma_chan);
+ return;
+ }
+
+ entry = &q->fbpt[q->bufs_first * CIO2_MAX_LOPS];
+ if (entry->first_entry.ctrl & CIO2_FBPT_CTRL_VALID) {
+ dev_warn(&cio2->pci_dev->dev,
+ "no ready buffers found on DMA channel %u\n",
+ dma_chan);
+ return;
+ }
+
+ /* Find out which buffer(s) are ready */
+ do {
+ struct cio2_buffer *b;
+
+ b = q->bufs[q->bufs_first];
+ if (b) {
+ unsigned int received = entry[1].second_entry.num_of_bytes;
+ unsigned long payload =
+ vb2_get_plane_payload(&b->vbb.vb2_buf, 0);
+
+ q->bufs[q->bufs_first] = NULL;
+ atomic_dec(&q->bufs_queued);
+ dev_dbg(&cio2->pci_dev->dev,
+ "buffer %i done\n", b->vbb.vb2_buf.index);
+
+ b->vbb.vb2_buf.timestamp = ns;
+ b->vbb.field = V4L2_FIELD_NONE;
+ b->vbb.sequence = atomic_read(&q->frame_sequence);
+ if (payload != received)
+ dev_warn(dev,
+ "payload length is %lu, received %u\n",
+ payload, received);
+ vb2_buffer_done(&b->vbb.vb2_buf, VB2_BUF_STATE_DONE);
+ }
+ atomic_inc(&q->frame_sequence);
+ cio2_fbpt_entry_init_dummy(cio2, entry);
+ q->bufs_first = (q->bufs_first + 1) % CIO2_MAX_BUFFERS;
+ entry = &q->fbpt[q->bufs_first * CIO2_MAX_LOPS];
+ } while (!(entry->first_entry.ctrl & CIO2_FBPT_CTRL_VALID));
+}
+
+static void cio2_queue_event_sof(struct cio2_device *cio2, struct cio2_queue *q)
+{
+ /*
+ * For the user space camera control algorithms it is essential
+ * to know when the reception of a frame has begun. That's often
+ * the best timing information to get from the hardware.
+ */
+ struct v4l2_event event = {
+ .type = V4L2_EVENT_FRAME_SYNC,
+ .u.frame_sync.frame_sequence = atomic_read(&q->frame_sequence),
+ };
+
+ v4l2_event_queue(q->subdev.devnode, &event);
+}
+
+static const char *const cio2_irq_errs[] = {
+ "single packet header error corrected",
+ "multiple packet header errors detected",
+ "payload checksum (CRC) error",
+ "fifo overflow",
+ "reserved short packet data type detected",
+ "reserved long packet data type detected",
+ "incomplete long packet detected",
+ "frame sync error",
+ "line sync error",
+ "DPHY start of transmission error",
+ "DPHY synchronization error",
+ "escape mode error",
+ "escape mode trigger event",
+ "escape mode ultra-low power state for data lane(s)",
+ "escape mode ultra-low power state exit for clock lane",
+ "inter-frame short packet discarded",
+ "inter-frame long packet discarded",
+ "non-matching Long Packet stalled",
+};
+
+static const char *const cio2_port_errs[] = {
+ "ECC recoverable",
+ "DPHY not recoverable",
+ "ECC not recoverable",
+ "CRC error",
+ "INTERFRAMEDATA",
+ "PKT2SHORT",
+ "PKT2LONG",
+};
+
+static void cio2_irq_handle_once(struct cio2_device *cio2, u32 int_status)
+{
+ void __iomem *const base = cio2->base;
+ struct device *dev = &cio2->pci_dev->dev;
+
+ if (int_status & CIO2_INT_IOOE) {
+ /*
+ * Interrupt on Output Error:
+ * 1) SRAM is full and FS received, or
+ * 2) An invalid bit detected by DMA.
+ */
+ u32 oe_status, oe_clear;
+
+ oe_clear = readl(base + CIO2_REG_INT_STS_EXT_OE);
+ oe_status = oe_clear;
+
+ if (oe_status & CIO2_INT_EXT_OE_DMAOE_MASK) {
+ dev_err(dev, "DMA output error: 0x%x\n",
+ (oe_status & CIO2_INT_EXT_OE_DMAOE_MASK)
+ >> CIO2_INT_EXT_OE_DMAOE_SHIFT);
+ oe_status &= ~CIO2_INT_EXT_OE_DMAOE_MASK;
+ }
+ if (oe_status & CIO2_INT_EXT_OE_OES_MASK) {
+ dev_err(dev, "DMA output error on CSI2 buses: 0x%x\n",
+ (oe_status & CIO2_INT_EXT_OE_OES_MASK)
+ >> CIO2_INT_EXT_OE_OES_SHIFT);
+ oe_status &= ~CIO2_INT_EXT_OE_OES_MASK;
+ }
+ writel(oe_clear, base + CIO2_REG_INT_STS_EXT_OE);
+ if (oe_status)
+ dev_warn(dev, "unknown interrupt 0x%x on OE\n",
+ oe_status);
+ int_status &= ~CIO2_INT_IOOE;
+ }
+
+ if (int_status & CIO2_INT_IOC_MASK) {
+ /* DMA IO done -- frame ready */
+ u32 clr = 0;
+ unsigned int d;
+
+ for (d = 0; d < CIO2_NUM_DMA_CHAN; d++)
+ if (int_status & CIO2_INT_IOC(d)) {
+ clr |= CIO2_INT_IOC(d);
+ cio2_buffer_done(cio2, d);
+ }
+ int_status &= ~clr;
+ }
+
+ if (int_status & CIO2_INT_IOS_IOLN_MASK) {
+ /* DMA IO starts or reached specified line */
+ u32 clr = 0;
+ unsigned int d;
+
+ for (d = 0; d < CIO2_NUM_DMA_CHAN; d++)
+ if (int_status & CIO2_INT_IOS_IOLN(d)) {
+ clr |= CIO2_INT_IOS_IOLN(d);
+ if (d == CIO2_DMA_CHAN)
+ cio2_queue_event_sof(cio2,
+ cio2->cur_queue);
+ }
+ int_status &= ~clr;
+ }
+
+ if (int_status & (CIO2_INT_IOIE | CIO2_INT_IOIRQ)) {
+ /* CSI2 receiver (error) interrupt */
+ u32 ie_status, ie_clear;
+ unsigned int port;
+
+ ie_clear = readl(base + CIO2_REG_INT_STS_EXT_IE);
+ ie_status = ie_clear;
+
+ for (port = 0; port < CIO2_NUM_PORTS; port++) {
+ u32 port_status = (ie_status >> (port * 8)) & 0xff;
+ u32 err_mask = BIT_MASK(ARRAY_SIZE(cio2_port_errs)) - 1;
+ void __iomem *const csi_rx_base =
+ base + CIO2_REG_PIPE_BASE(port);
+ unsigned int i;
+
+ while (port_status & err_mask) {
+ i = ffs(port_status) - 1;
+ dev_err(dev, "port %i error %s\n",
+ port, cio2_port_errs[i]);
+ ie_status &= ~BIT(port * 8 + i);
+ port_status &= ~BIT(i);
+ }
+
+ if (ie_status & CIO2_INT_EXT_IE_IRQ(port)) {
+ u32 csi2_status, csi2_clear;
+
+ csi2_status = readl(csi_rx_base +
+ CIO2_REG_IRQCTRL_STATUS);
+ csi2_clear = csi2_status;
+ err_mask =
+ BIT_MASK(ARRAY_SIZE(cio2_irq_errs)) - 1;
+
+ while (csi2_status & err_mask) {
+ i = ffs(csi2_status) - 1;
+ dev_err(dev,
+ "CSI-2 receiver port %i: %s\n",
+ port, cio2_irq_errs[i]);
+ csi2_status &= ~BIT(i);
+ }
+
+ writel(csi2_clear,
+ csi_rx_base + CIO2_REG_IRQCTRL_CLEAR);
+ if (csi2_status)
+ dev_warn(dev,
+ "unknown CSI2 error 0x%x on port %i\n",
+ csi2_status, port);
+
+ ie_status &= ~CIO2_INT_EXT_IE_IRQ(port);
+ }
+ }
+
+ writel(ie_clear, base + CIO2_REG_INT_STS_EXT_IE);
+ if (ie_status)
+ dev_warn(dev, "unknown interrupt 0x%x on IE\n",
+ ie_status);
+
+ int_status &= ~(CIO2_INT_IOIE | CIO2_INT_IOIRQ);
+ }
+
+ if (int_status)
+ dev_warn(dev, "unknown interrupt 0x%x on INT\n", int_status);
+}
+
+static irqreturn_t cio2_irq(int irq, void *cio2_ptr)
+{
+ struct cio2_device *cio2 = cio2_ptr;
+ void __iomem *const base = cio2->base;
+ struct device *dev = &cio2->pci_dev->dev;
+ u32 int_status;
+
+ int_status = readl(base + CIO2_REG_INT_STS);
+ dev_dbg(dev, "isr enter - interrupt status 0x%x\n", int_status);
+ if (!int_status)
+ return IRQ_NONE;
+
+ do {
+ writel(int_status, base + CIO2_REG_INT_STS);
+ cio2_irq_handle_once(cio2, int_status);
+ int_status = readl(base + CIO2_REG_INT_STS);
+ if (int_status)
+ dev_dbg(dev, "pending status 0x%x\n", int_status);
+ } while (int_status);
+
+ return IRQ_HANDLED;
+}
+
+/**************** Videobuf2 interface ****************/
+
+static void cio2_vb2_return_all_buffers(struct cio2_queue *q,
+ enum vb2_buffer_state state)
+{
+ unsigned int i;
+
+ for (i = 0; i < CIO2_MAX_BUFFERS; i++) {
+ if (q->bufs[i]) {
+ atomic_dec(&q->bufs_queued);
+ vb2_buffer_done(&q->bufs[i]->vbb.vb2_buf,
+ state);
+ q->bufs[i] = NULL;
+ }
+ }
+}
+
+static int cio2_vb2_queue_setup(struct vb2_queue *vq,
+ unsigned int *num_buffers,
+ unsigned int *num_planes,
+ unsigned int sizes[],
+ struct device *alloc_devs[])
+{
+ struct cio2_device *cio2 = vb2_get_drv_priv(vq);
+ struct cio2_queue *q = vb2q_to_cio2_queue(vq);
+ unsigned int i;
+
+ *num_planes = q->format.num_planes;
+
+ for (i = 0; i < *num_planes; ++i) {
+ sizes[i] = q->format.plane_fmt[i].sizeimage;
+ alloc_devs[i] = &cio2->pci_dev->dev;
+ }
+
+ *num_buffers = clamp_val(*num_buffers, 1, CIO2_MAX_BUFFERS);
+
+ /* Initialize buffer queue */
+ for (i = 0; i < CIO2_MAX_BUFFERS; i++) {
+ q->bufs[i] = NULL;
+ cio2_fbpt_entry_init_dummy(cio2, &q->fbpt[i * CIO2_MAX_LOPS]);
+ }
+ atomic_set(&q->bufs_queued, 0);
+ q->bufs_first = 0;
+ q->bufs_next = 0;
+
+ return 0;
+}
+
+/* Called after each buffer is allocated */
+static int cio2_vb2_buf_init(struct vb2_buffer *vb)
+{
+ struct cio2_device *cio2 = vb2_get_drv_priv(vb->vb2_queue);
+ struct device *dev = &cio2->pci_dev->dev;
+ struct cio2_buffer *b =
+ container_of(vb, struct cio2_buffer, vbb.vb2_buf);
+ unsigned int pages = PFN_UP(vb->planes[0].length);
+ unsigned int lops = DIV_ROUND_UP(pages + 1, CIO2_LOP_ENTRIES);
+ struct sg_table *sg;
+ struct sg_dma_page_iter sg_iter;
+ unsigned int i, j;
+
+ if (lops <= 0 || lops > CIO2_MAX_LOPS) {
+ dev_err(dev, "%s: bad buffer size (%i)\n", __func__,
+ vb->planes[0].length);
+ return -ENOSPC; /* Should never happen */
+ }
+
+ memset(b->lop, 0, sizeof(b->lop));
+ /* Allocate LOP table */
+ for (i = 0; i < lops; i++) {
+ b->lop[i] = dma_alloc_coherent(dev, PAGE_SIZE,
+ &b->lop_bus_addr[i], GFP_KERNEL);
+ if (!b->lop[i])
+ goto fail;
+ }
+
+ /* Fill LOP */
+ sg = vb2_dma_sg_plane_desc(vb, 0);
+ if (!sg)
+ return -ENOMEM;
+
+ if (sg->nents && sg->sgl)
+ b->offset = sg->sgl->offset;
+
+ i = j = 0;
+ for_each_sg_dma_page(sg->sgl, &sg_iter, sg->nents, 0) {
+ if (!pages--)
+ break;
+ b->lop[i][j] = PFN_DOWN(sg_page_iter_dma_address(&sg_iter));
+ j++;
+ if (j == CIO2_LOP_ENTRIES) {
+ i++;
+ j = 0;
+ }
+ }
+
+ b->lop[i][j] = PFN_DOWN(cio2->dummy_page_bus_addr);
+ return 0;
+fail:
+ while (i--)
+ dma_free_coherent(dev, PAGE_SIZE, b->lop[i], b->lop_bus_addr[i]);
+ return -ENOMEM;
+}
+
+/* Transfer buffer ownership to cio2 */
+static void cio2_vb2_buf_queue(struct vb2_buffer *vb)
+{
+ struct cio2_device *cio2 = vb2_get_drv_priv(vb->vb2_queue);
+ struct cio2_queue *q =
+ container_of(vb->vb2_queue, struct cio2_queue, vbq);
+ struct cio2_buffer *b =
+ container_of(vb, struct cio2_buffer, vbb.vb2_buf);
+ struct cio2_fbpt_entry *entry;
+ unsigned long flags;
+ unsigned int i, j, next = q->bufs_next;
+ int bufs_queued = atomic_inc_return(&q->bufs_queued);
+ u32 fbpt_rp;
+
+ dev_dbg(&cio2->pci_dev->dev, "queue buffer %d\n", vb->index);
+
+ /*
+ * This code queues the buffer to the CIO2 DMA engine, which starts
+ * running once streaming has started. It is possible that this code
+ * gets pre-empted due to increased CPU load. Upon this, the driver
+ * does not get an opportunity to queue new buffers to the CIO2 DMA
+ * engine. When the DMA engine encounters an FBPT entry without the
+ * VALID bit set, the DMA engine halts, which requires a restart of
+ * the DMA engine and sensor, to continue streaming.
+ * This is not desired and is highly unlikely given that there are
+ * 32 FBPT entries that the DMA engine needs to process, to run into
+ * an FBPT entry, without the VALID bit set. We try to mitigate this
+ * by disabling interrupts for the duration of this queueing.
+ */
+ local_irq_save(flags);
+
+ fbpt_rp = (readl(cio2->base + CIO2_REG_CDMARI(CIO2_DMA_CHAN))
+ >> CIO2_CDMARI_FBPT_RP_SHIFT)
+ & CIO2_CDMARI_FBPT_RP_MASK;
+
+ /*
+ * fbpt_rp is the fbpt entry that the dma is currently working
+ * on, but since it could jump to next entry at any time,
+ * assume that we might already be there.
+ */
+ fbpt_rp = (fbpt_rp + 1) % CIO2_MAX_BUFFERS;
+
+ if (bufs_queued <= 1 || fbpt_rp == next)
+ /* Buffers were drained */
+ next = (fbpt_rp + 1) % CIO2_MAX_BUFFERS;
+
+ for (i = 0; i < CIO2_MAX_BUFFERS; i++) {
+ /*
+ * We have allocated CIO2_MAX_BUFFERS circularly for the
+ * hw, the user has requested N buffer queue. The driver
+ * ensures N <= CIO2_MAX_BUFFERS and guarantees that whenever
+ * user queues a buffer, there necessarily is a free buffer.
+ */
+ if (!q->bufs[next]) {
+ q->bufs[next] = b;
+ entry = &q->fbpt[next * CIO2_MAX_LOPS];
+ cio2_fbpt_entry_init_buf(cio2, b, entry);
+ local_irq_restore(flags);
+ q->bufs_next = (next + 1) % CIO2_MAX_BUFFERS;
+ for (j = 0; j < vb->num_planes; j++)
+ vb2_set_plane_payload(vb, j,
+ q->format.plane_fmt[j].sizeimage);
+ return;
+ }
+
+ dev_dbg(&cio2->pci_dev->dev, "entry %i was full!\n", next);
+ next = (next + 1) % CIO2_MAX_BUFFERS;
+ }
+
+ local_irq_restore(flags);
+ dev_err(&cio2->pci_dev->dev, "error: all cio2 entries were full!\n");
+ atomic_dec(&q->bufs_queued);
+ vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
+}
+
+/* Called when each buffer is freed */
+static void cio2_vb2_buf_cleanup(struct vb2_buffer *vb)
+{
+ struct cio2_device *cio2 = vb2_get_drv_priv(vb->vb2_queue);
+ struct cio2_buffer *b =
+ container_of(vb, struct cio2_buffer, vbb.vb2_buf);
+ unsigned int i;
+
+ /* Free LOP table */
+ for (i = 0; i < CIO2_MAX_LOPS; i++) {
+ if (b->lop[i])
+ dma_free_coherent(&cio2->pci_dev->dev, PAGE_SIZE,
+ b->lop[i], b->lop_bus_addr[i]);
+ }
+}
+
+static int cio2_vb2_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct cio2_queue *q = vb2q_to_cio2_queue(vq);
+ struct cio2_device *cio2 = vb2_get_drv_priv(vq);
+ int r;
+
+ cio2->cur_queue = q;
+ atomic_set(&q->frame_sequence, 0);
+
+ r = pm_runtime_get_sync(&cio2->pci_dev->dev);
+ if (r < 0) {
+ dev_info(&cio2->pci_dev->dev, "failed to set power %d\n", r);
+ pm_runtime_put_noidle(&cio2->pci_dev->dev);
+ return r;
+ }
+
+ r = media_pipeline_start(&q->vdev.entity, &q->pipe);
+ if (r)
+ goto fail_pipeline;
+
+ r = cio2_hw_init(cio2, q);
+ if (r)
+ goto fail_hw;
+
+ /* Start streaming on sensor */
+ r = v4l2_subdev_call(q->sensor, video, s_stream, 1);
+ if (r)
+ goto fail_csi2_subdev;
+
+ cio2->streaming = true;
+
+ return 0;
+
+fail_csi2_subdev:
+ cio2_hw_exit(cio2, q);
+fail_hw:
+ media_pipeline_stop(&q->vdev.entity);
+fail_pipeline:
+ dev_dbg(&cio2->pci_dev->dev, "failed to start streaming (%d)\n", r);
+ cio2_vb2_return_all_buffers(q, VB2_BUF_STATE_QUEUED);
+ pm_runtime_put(&cio2->pci_dev->dev);
+
+ return r;
+}
+
+static void cio2_vb2_stop_streaming(struct vb2_queue *vq)
+{
+ struct cio2_queue *q = vb2q_to_cio2_queue(vq);
+ struct cio2_device *cio2 = vb2_get_drv_priv(vq);
+
+ if (v4l2_subdev_call(q->sensor, video, s_stream, 0))
+ dev_err(&cio2->pci_dev->dev,
+ "failed to stop sensor streaming\n");
+
+ cio2_hw_exit(cio2, q);
+ synchronize_irq(cio2->pci_dev->irq);
+ cio2_vb2_return_all_buffers(q, VB2_BUF_STATE_ERROR);
+ media_pipeline_stop(&q->vdev.entity);
+ pm_runtime_put(&cio2->pci_dev->dev);
+ cio2->streaming = false;
+}
+
+static const struct vb2_ops cio2_vb2_ops = {
+ .buf_init = cio2_vb2_buf_init,
+ .buf_queue = cio2_vb2_buf_queue,
+ .buf_cleanup = cio2_vb2_buf_cleanup,
+ .queue_setup = cio2_vb2_queue_setup,
+ .start_streaming = cio2_vb2_start_streaming,
+ .stop_streaming = cio2_vb2_stop_streaming,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+};
+
+/**************** V4L2 interface ****************/
+
+static int cio2_v4l2_querycap(struct file *file, void *fh,
+ struct v4l2_capability *cap)
+{
+ struct cio2_device *cio2 = video_drvdata(file);
+
+ strscpy(cap->driver, CIO2_NAME, sizeof(cap->driver));
+ strscpy(cap->card, CIO2_DEVICE_NAME, sizeof(cap->card));
+ snprintf(cap->bus_info, sizeof(cap->bus_info),
+ "PCI:%s", pci_name(cio2->pci_dev));
+
+ return 0;
+}
+
+static int cio2_v4l2_enum_fmt(struct file *file, void *fh,
+ struct v4l2_fmtdesc *f)
+{
+ if (f->index >= ARRAY_SIZE(formats))
+ return -EINVAL;
+
+ f->pixelformat = formats[f->index].fourcc;
+
+ return 0;
+}
+
+/* The format is validated in cio2_video_link_validate() */
+static int cio2_v4l2_g_fmt(struct file *file, void *fh, struct v4l2_format *f)
+{
+ struct cio2_queue *q = file_to_cio2_queue(file);
+
+ f->fmt.pix_mp = q->format;
+
+ return 0;
+}
+
+static int cio2_v4l2_try_fmt(struct file *file, void *fh, struct v4l2_format *f)
+{
+ const struct ipu3_cio2_fmt *fmt;
+ struct v4l2_pix_format_mplane *mpix = &f->fmt.pix_mp;
+
+ fmt = cio2_find_format(&mpix->pixelformat, NULL);
+ if (!fmt)
+ fmt = &formats[0];
+
+ /* Only supports up to 4224x3136 */
+ if (mpix->width > CIO2_IMAGE_MAX_WIDTH)
+ mpix->width = CIO2_IMAGE_MAX_WIDTH;
+ if (mpix->height > CIO2_IMAGE_MAX_HEIGHT)
+ mpix->height = CIO2_IMAGE_MAX_HEIGHT;
+
+ mpix->num_planes = 1;
+ mpix->pixelformat = fmt->fourcc;
+ mpix->colorspace = V4L2_COLORSPACE_RAW;
+ mpix->field = V4L2_FIELD_NONE;
+ memset(mpix->reserved, 0, sizeof(mpix->reserved));
+ mpix->plane_fmt[0].bytesperline = cio2_bytesperline(mpix->width);
+ mpix->plane_fmt[0].sizeimage = mpix->plane_fmt[0].bytesperline *
+ mpix->height;
+ memset(mpix->plane_fmt[0].reserved, 0,
+ sizeof(mpix->plane_fmt[0].reserved));
+
+ /* use default */
+ mpix->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
+ mpix->quantization = V4L2_QUANTIZATION_DEFAULT;
+ mpix->xfer_func = V4L2_XFER_FUNC_DEFAULT;
+
+ return 0;
+}
+
+static int cio2_v4l2_s_fmt(struct file *file, void *fh, struct v4l2_format *f)
+{
+ struct cio2_queue *q = file_to_cio2_queue(file);
+
+ cio2_v4l2_try_fmt(file, fh, f);
+ q->format = f->fmt.pix_mp;
+
+ return 0;
+}
+
+static int
+cio2_video_enum_input(struct file *file, void *fh, struct v4l2_input *input)
+{
+ if (input->index > 0)
+ return -EINVAL;
+
+ strscpy(input->name, "camera", sizeof(input->name));
+ input->type = V4L2_INPUT_TYPE_CAMERA;
+
+ return 0;
+}
+
+static int
+cio2_video_g_input(struct file *file, void *fh, unsigned int *input)
+{
+ *input = 0;
+
+ return 0;
+}
+
+static int
+cio2_video_s_input(struct file *file, void *fh, unsigned int input)
+{
+ return input == 0 ? 0 : -EINVAL;
+}
+
+static const struct v4l2_file_operations cio2_v4l2_fops = {
+ .owner = THIS_MODULE,
+ .unlocked_ioctl = video_ioctl2,
+ .open = v4l2_fh_open,
+ .release = vb2_fop_release,
+ .poll = vb2_fop_poll,
+ .mmap = vb2_fop_mmap,
+};
+
+static const struct v4l2_ioctl_ops cio2_v4l2_ioctl_ops = {
+ .vidioc_querycap = cio2_v4l2_querycap,
+ .vidioc_enum_fmt_vid_cap = cio2_v4l2_enum_fmt,
+ .vidioc_g_fmt_vid_cap_mplane = cio2_v4l2_g_fmt,
+ .vidioc_s_fmt_vid_cap_mplane = cio2_v4l2_s_fmt,
+ .vidioc_try_fmt_vid_cap_mplane = cio2_v4l2_try_fmt,
+ .vidioc_reqbufs = vb2_ioctl_reqbufs,
+ .vidioc_create_bufs = vb2_ioctl_create_bufs,
+ .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
+ .vidioc_querybuf = vb2_ioctl_querybuf,
+ .vidioc_qbuf = vb2_ioctl_qbuf,
+ .vidioc_dqbuf = vb2_ioctl_dqbuf,
+ .vidioc_streamon = vb2_ioctl_streamon,
+ .vidioc_streamoff = vb2_ioctl_streamoff,
+ .vidioc_expbuf = vb2_ioctl_expbuf,
+ .vidioc_enum_input = cio2_video_enum_input,
+ .vidioc_g_input = cio2_video_g_input,
+ .vidioc_s_input = cio2_video_s_input,
+};
+
+static int cio2_subdev_subscribe_event(struct v4l2_subdev *sd,
+ struct v4l2_fh *fh,
+ struct v4l2_event_subscription *sub)
+{
+ if (sub->type != V4L2_EVENT_FRAME_SYNC)
+ return -EINVAL;
+
+ /* Line number. For now only zero accepted. */
+ if (sub->id != 0)
+ return -EINVAL;
+
+ return v4l2_event_subscribe(fh, sub, 0, NULL);
+}
+
+static int cio2_subdev_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ struct v4l2_mbus_framefmt *format;
+ const struct v4l2_mbus_framefmt fmt_default = {
+ .width = 1936,
+ .height = 1096,
+ .code = formats[0].mbus_code,
+ .field = V4L2_FIELD_NONE,
+ .colorspace = V4L2_COLORSPACE_RAW,
+ .ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT,
+ .quantization = V4L2_QUANTIZATION_DEFAULT,
+ .xfer_func = V4L2_XFER_FUNC_DEFAULT,
+ };
+
+ /* Initialize try_fmt */
+ format = v4l2_subdev_get_try_format(sd, fh->pad, CIO2_PAD_SINK);
+ *format = fmt_default;
+
+ /* same as sink */
+ format = v4l2_subdev_get_try_format(sd, fh->pad, CIO2_PAD_SOURCE);
+ *format = fmt_default;
+
+ return 0;
+}
+
+/*
+ * cio2_subdev_get_fmt - Handle get format by pads subdev method
+ * @sd : pointer to v4l2 subdev structure
+ * @cfg: V4L2 subdev pad config
+ * @fmt: pointer to v4l2 subdev format structure
+ * return -EINVAL or zero on success
+ */
+static int cio2_subdev_get_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct cio2_queue *q = container_of(sd, struct cio2_queue, subdev);
+
+ mutex_lock(&q->subdev_lock);
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
+ fmt->format = *v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
+ else
+ fmt->format = q->subdev_fmt;
+
+ mutex_unlock(&q->subdev_lock);
+
+ return 0;
+}
+
+/*
+ * cio2_subdev_set_fmt - Handle set format by pads subdev method
+ * @sd : pointer to v4l2 subdev structure
+ * @cfg: V4L2 subdev pad config
+ * @fmt: pointer to v4l2 subdev format structure
+ * return -EINVAL or zero on success
+ */
+static int cio2_subdev_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct cio2_queue *q = container_of(sd, struct cio2_queue, subdev);
+ struct v4l2_mbus_framefmt *mbus;
+ u32 mbus_code = fmt->format.code;
+ unsigned int i;
+
+ /*
+ * Only allow setting sink pad format;
+ * source always propagates from sink
+ */
+ if (fmt->pad == CIO2_PAD_SOURCE)
+ return cio2_subdev_get_fmt(sd, cfg, fmt);
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
+ mbus = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
+ else
+ mbus = &q->subdev_fmt;
+
+ fmt->format.code = formats[0].mbus_code;
+
+ for (i = 0; i < ARRAY_SIZE(formats); i++) {
+ if (formats[i].mbus_code == mbus_code) {
+ fmt->format.code = mbus_code;
+ break;
+ }
+ }
+
+ fmt->format.width = min(fmt->format.width, CIO2_IMAGE_MAX_WIDTH);
+ fmt->format.height = min(fmt->format.height, CIO2_IMAGE_MAX_HEIGHT);
+ fmt->format.field = V4L2_FIELD_NONE;
+
+ mutex_lock(&q->subdev_lock);
+ *mbus = fmt->format;
+ mutex_unlock(&q->subdev_lock);
+
+ return 0;
+}
+
+static int cio2_subdev_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ if (code->index >= ARRAY_SIZE(formats))
+ return -EINVAL;
+
+ code->code = formats[code->index].mbus_code;
+ return 0;
+}
+
+static int cio2_subdev_link_validate_get_format(struct media_pad *pad,
+ struct v4l2_subdev_format *fmt)
+{
+ if (is_media_entity_v4l2_subdev(pad->entity)) {
+ struct v4l2_subdev *sd =
+ media_entity_to_v4l2_subdev(pad->entity);
+
+ fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE;
+ fmt->pad = pad->index;
+ return v4l2_subdev_call(sd, pad, get_fmt, NULL, fmt);
+ }
+
+ return -EINVAL;
+}
+
+static int cio2_video_link_validate(struct media_link *link)
+{
+ struct video_device *vd = container_of(link->sink->entity,
+ struct video_device, entity);
+ struct cio2_queue *q = container_of(vd, struct cio2_queue, vdev);
+ struct cio2_device *cio2 = video_get_drvdata(vd);
+ struct v4l2_subdev_format source_fmt;
+ int ret;
+
+ if (!media_entity_remote_pad(link->sink->entity->pads)) {
+ dev_info(&cio2->pci_dev->dev,
+ "video node %s pad not connected\n", vd->name);
+ return -ENOTCONN;
+ }
+
+ ret = cio2_subdev_link_validate_get_format(link->source, &source_fmt);
+ if (ret < 0)
+ return 0;
+
+ if (source_fmt.format.width != q->format.width ||
+ source_fmt.format.height != q->format.height) {
+ dev_err(&cio2->pci_dev->dev,
+ "Wrong width or height %ux%u (%ux%u expected)\n",
+ q->format.width, q->format.height,
+ source_fmt.format.width, source_fmt.format.height);
+ return -EINVAL;
+ }
+
+ if (!cio2_find_format(&q->format.pixelformat, &source_fmt.format.code))
+ return -EINVAL;
+
+ return 0;
+}
+
+static const struct v4l2_subdev_core_ops cio2_subdev_core_ops = {
+ .subscribe_event = cio2_subdev_subscribe_event,
+ .unsubscribe_event = v4l2_event_subdev_unsubscribe,
+};
+
+static const struct v4l2_subdev_internal_ops cio2_subdev_internal_ops = {
+ .open = cio2_subdev_open,
+};
+
+static const struct v4l2_subdev_pad_ops cio2_subdev_pad_ops = {
+ .link_validate = v4l2_subdev_link_validate_default,
+ .get_fmt = cio2_subdev_get_fmt,
+ .set_fmt = cio2_subdev_set_fmt,
+ .enum_mbus_code = cio2_subdev_enum_mbus_code,
+};
+
+static const struct v4l2_subdev_ops cio2_subdev_ops = {
+ .core = &cio2_subdev_core_ops,
+ .pad = &cio2_subdev_pad_ops,
+};
+
+/******* V4L2 sub-device asynchronous registration callbacks***********/
+
+struct sensor_async_subdev {
+ struct v4l2_async_subdev asd;
+ struct csi2_bus_info csi2;
+};
+
+/* The .bound() notifier callback when a match is found */
+static int cio2_notifier_bound(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *sd,
+ struct v4l2_async_subdev *asd)
+{
+ struct cio2_device *cio2 = container_of(notifier,
+ struct cio2_device, notifier);
+ struct sensor_async_subdev *s_asd = container_of(asd,
+ struct sensor_async_subdev, asd);
+ struct cio2_queue *q;
+
+ if (cio2->queue[s_asd->csi2.port].sensor)
+ return -EBUSY;
+
+ q = &cio2->queue[s_asd->csi2.port];
+
+ q->csi2 = s_asd->csi2;
+ q->sensor = sd;
+ q->csi_rx_base = cio2->base + CIO2_REG_PIPE_BASE(q->csi2.port);
+
+ return 0;
+}
+
+/* The .unbind callback */
+static void cio2_notifier_unbind(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *sd,
+ struct v4l2_async_subdev *asd)
+{
+ struct cio2_device *cio2 = container_of(notifier,
+ struct cio2_device, notifier);
+ struct sensor_async_subdev *s_asd = container_of(asd,
+ struct sensor_async_subdev, asd);
+
+ cio2->queue[s_asd->csi2.port].sensor = NULL;
+}
+
+/* .complete() is called after all subdevices have been located */
+static int cio2_notifier_complete(struct v4l2_async_notifier *notifier)
+{
+ struct cio2_device *cio2 = container_of(notifier, struct cio2_device,
+ notifier);
+ struct sensor_async_subdev *s_asd;
+ struct v4l2_async_subdev *asd;
+ struct cio2_queue *q;
+ unsigned int pad;
+ int ret;
+
+ list_for_each_entry(asd, &cio2->notifier.asd_list, asd_list) {
+ s_asd = container_of(asd, struct sensor_async_subdev, asd);
+ q = &cio2->queue[s_asd->csi2.port];
+
+ for (pad = 0; pad < q->sensor->entity.num_pads; pad++)
+ if (q->sensor->entity.pads[pad].flags &
+ MEDIA_PAD_FL_SOURCE)
+ break;
+
+ if (pad == q->sensor->entity.num_pads) {
+ dev_err(&cio2->pci_dev->dev,
+ "failed to find src pad for %s\n",
+ q->sensor->name);
+ return -ENXIO;
+ }
+
+ ret = media_create_pad_link(
+ &q->sensor->entity, pad,
+ &q->subdev.entity, CIO2_PAD_SINK,
+ 0);
+ if (ret) {
+ dev_err(&cio2->pci_dev->dev,
+ "failed to create link for %s\n",
+ q->sensor->name);
+ return ret;
+ }
+ }
+
+ return v4l2_device_register_subdev_nodes(&cio2->v4l2_dev);
+}
+
+static const struct v4l2_async_notifier_operations cio2_async_ops = {
+ .bound = cio2_notifier_bound,
+ .unbind = cio2_notifier_unbind,
+ .complete = cio2_notifier_complete,
+};
+
+static int cio2_parse_firmware(struct cio2_device *cio2)
+{
+ unsigned int i;
+ int ret;
+
+ for (i = 0; i < CIO2_NUM_PORTS; i++) {
+ struct v4l2_fwnode_endpoint vep = {
+ .bus_type = V4L2_MBUS_CSI2_DPHY
+ };
+ struct sensor_async_subdev *s_asd = NULL;
+ struct fwnode_handle *ep;
+
+ ep = fwnode_graph_get_endpoint_by_id(
+ dev_fwnode(&cio2->pci_dev->dev), i, 0,
+ FWNODE_GRAPH_ENDPOINT_NEXT);
+
+ if (!ep)
+ continue;
+
+ ret = v4l2_fwnode_endpoint_parse(ep, &vep);
+ if (ret)
+ goto err_parse;
+
+ s_asd = kzalloc(sizeof(*s_asd), GFP_KERNEL);
+ if (!s_asd) {
+ ret = -ENOMEM;
+ goto err_parse;
+ }
+
+ s_asd->csi2.port = vep.base.port;
+ s_asd->csi2.lanes = vep.bus.mipi_csi2.num_data_lanes;
+
+ ret = v4l2_async_notifier_add_fwnode_remote_subdev(
+ &cio2->notifier, ep, &s_asd->asd);
+ if (ret)
+ goto err_parse;
+
+ fwnode_handle_put(ep);
+
+ continue;
+
+err_parse:
+ fwnode_handle_put(ep);
+ kfree(s_asd);
+ return ret;
+ }
+
+ /*
+ * Proceed even without sensors connected to allow the device to
+ * suspend.
+ */
+ cio2->notifier.ops = &cio2_async_ops;
+ ret = v4l2_async_notifier_register(&cio2->v4l2_dev, &cio2->notifier);
+ if (ret)
+ dev_err(&cio2->pci_dev->dev,
+ "failed to register async notifier : %d\n", ret);
+
+ return ret;
+}
+
+/**************** Queue initialization ****************/
+static const struct media_entity_operations cio2_media_ops = {
+ .link_validate = v4l2_subdev_link_validate,
+};
+
+static const struct media_entity_operations cio2_video_entity_ops = {
+ .link_validate = cio2_video_link_validate,
+};
+
+static int cio2_queue_init(struct cio2_device *cio2, struct cio2_queue *q)
+{
+ static const u32 default_width = 1936;
+ static const u32 default_height = 1096;
+ const struct ipu3_cio2_fmt dflt_fmt = formats[0];
+
+ struct video_device *vdev = &q->vdev;
+ struct vb2_queue *vbq = &q->vbq;
+ struct v4l2_subdev *subdev = &q->subdev;
+ struct v4l2_mbus_framefmt *fmt;
+ int r;
+
+ /* Initialize miscellaneous variables */
+ mutex_init(&q->lock);
+ mutex_init(&q->subdev_lock);
+
+ /* Initialize formats to default values */
+ fmt = &q->subdev_fmt;
+ fmt->width = default_width;
+ fmt->height = default_height;
+ fmt->code = dflt_fmt.mbus_code;
+ fmt->field = V4L2_FIELD_NONE;
+
+ q->format.width = default_width;
+ q->format.height = default_height;
+ q->format.pixelformat = dflt_fmt.fourcc;
+ q->format.colorspace = V4L2_COLORSPACE_RAW;
+ q->format.field = V4L2_FIELD_NONE;
+ q->format.num_planes = 1;
+ q->format.plane_fmt[0].bytesperline =
+ cio2_bytesperline(q->format.width);
+ q->format.plane_fmt[0].sizeimage = q->format.plane_fmt[0].bytesperline *
+ q->format.height;
+
+ /* Initialize fbpt */
+ r = cio2_fbpt_init(cio2, q);
+ if (r)
+ goto fail_fbpt;
+
+ /* Initialize media entities */
+ q->subdev_pads[CIO2_PAD_SINK].flags = MEDIA_PAD_FL_SINK |
+ MEDIA_PAD_FL_MUST_CONNECT;
+ q->subdev_pads[CIO2_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
+ subdev->entity.ops = &cio2_media_ops;
+ subdev->internal_ops = &cio2_subdev_internal_ops;
+ r = media_entity_pads_init(&subdev->entity, CIO2_PADS, q->subdev_pads);
+ if (r) {
+ dev_err(&cio2->pci_dev->dev,
+ "failed initialize subdev media entity (%d)\n", r);
+ goto fail_subdev_media_entity;
+ }
+
+ q->vdev_pad.flags = MEDIA_PAD_FL_SINK | MEDIA_PAD_FL_MUST_CONNECT;
+ vdev->entity.ops = &cio2_video_entity_ops;
+ r = media_entity_pads_init(&vdev->entity, 1, &q->vdev_pad);
+ if (r) {
+ dev_err(&cio2->pci_dev->dev,
+ "failed initialize videodev media entity (%d)\n", r);
+ goto fail_vdev_media_entity;
+ }
+
+ /* Initialize subdev */
+ v4l2_subdev_init(subdev, &cio2_subdev_ops);
+ subdev->flags = V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
+ subdev->owner = THIS_MODULE;
+ snprintf(subdev->name, sizeof(subdev->name),
+ CIO2_ENTITY_NAME " %td", q - cio2->queue);
+ subdev->entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
+ v4l2_set_subdevdata(subdev, cio2);
+ r = v4l2_device_register_subdev(&cio2->v4l2_dev, subdev);
+ if (r) {
+ dev_err(&cio2->pci_dev->dev,
+ "failed initialize subdev (%d)\n", r);
+ goto fail_subdev;
+ }
+
+ /* Initialize vbq */
+ vbq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+ vbq->io_modes = VB2_USERPTR | VB2_MMAP | VB2_DMABUF;
+ vbq->ops = &cio2_vb2_ops;
+ vbq->mem_ops = &vb2_dma_sg_memops;
+ vbq->buf_struct_size = sizeof(struct cio2_buffer);
+ vbq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ vbq->min_buffers_needed = 1;
+ vbq->drv_priv = cio2;
+ vbq->lock = &q->lock;
+ r = vb2_queue_init(vbq);
+ if (r) {
+ dev_err(&cio2->pci_dev->dev,
+ "failed to initialize videobuf2 queue (%d)\n", r);
+ goto fail_subdev;
+ }
+
+ /* Initialize vdev */
+ snprintf(vdev->name, sizeof(vdev->name),
+ "%s %td", CIO2_NAME, q - cio2->queue);
+ vdev->release = video_device_release_empty;
+ vdev->fops = &cio2_v4l2_fops;
+ vdev->ioctl_ops = &cio2_v4l2_ioctl_ops;
+ vdev->lock = &cio2->lock;
+ vdev->v4l2_dev = &cio2->v4l2_dev;
+ vdev->queue = &q->vbq;
+ vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_STREAMING;
+ video_set_drvdata(vdev, cio2);
+ r = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
+ if (r) {
+ dev_err(&cio2->pci_dev->dev,
+ "failed to register video device (%d)\n", r);
+ goto fail_vdev;
+ }
+
+ /* Create link from CIO2 subdev to output node */
+ r = media_create_pad_link(
+ &subdev->entity, CIO2_PAD_SOURCE, &vdev->entity, 0,
+ MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE);
+ if (r)
+ goto fail_link;
+
+ return 0;
+
+fail_link:
+ vb2_video_unregister_device(&q->vdev);
+fail_vdev:
+ v4l2_device_unregister_subdev(subdev);
+fail_subdev:
+ media_entity_cleanup(&vdev->entity);
+fail_vdev_media_entity:
+ media_entity_cleanup(&subdev->entity);
+fail_subdev_media_entity:
+ cio2_fbpt_exit(q, &cio2->pci_dev->dev);
+fail_fbpt:
+ mutex_destroy(&q->subdev_lock);
+ mutex_destroy(&q->lock);
+
+ return r;
+}
+
+static void cio2_queue_exit(struct cio2_device *cio2, struct cio2_queue *q)
+{
+ vb2_video_unregister_device(&q->vdev);
+ media_entity_cleanup(&q->vdev.entity);
+ v4l2_device_unregister_subdev(&q->subdev);
+ media_entity_cleanup(&q->subdev.entity);
+ cio2_fbpt_exit(q, &cio2->pci_dev->dev);
+ mutex_destroy(&q->subdev_lock);
+ mutex_destroy(&q->lock);
+}
+
+static int cio2_queues_init(struct cio2_device *cio2)
+{
+ int i, r;
+
+ for (i = 0; i < CIO2_QUEUES; i++) {
+ r = cio2_queue_init(cio2, &cio2->queue[i]);
+ if (r)
+ break;
+ }
+
+ if (i == CIO2_QUEUES)
+ return 0;
+
+ for (i--; i >= 0; i--)
+ cio2_queue_exit(cio2, &cio2->queue[i]);
+
+ return r;
+}
+
+static void cio2_queues_exit(struct cio2_device *cio2)
+{
+ unsigned int i;
+
+ for (i = 0; i < CIO2_QUEUES; i++)
+ cio2_queue_exit(cio2, &cio2->queue[i]);
+}
+
+static int cio2_check_fwnode_graph(struct fwnode_handle *fwnode)
+{
+ struct fwnode_handle *endpoint;
+
+ if (IS_ERR_OR_NULL(fwnode))
+ return -EINVAL;
+
+ endpoint = fwnode_graph_get_next_endpoint(fwnode, NULL);
+ if (endpoint) {
+ fwnode_handle_put(endpoint);
+ return 0;
+ }
+
+ return cio2_check_fwnode_graph(fwnode->secondary);
+}
+
+/**************** PCI interface ****************/
+
+static int cio2_pci_probe(struct pci_dev *pci_dev,
+ const struct pci_device_id *id)
+{
+ struct fwnode_handle *fwnode = dev_fwnode(&pci_dev->dev);
+ struct cio2_device *cio2;
+ int r;
+
+ cio2 = devm_kzalloc(&pci_dev->dev, sizeof(*cio2), GFP_KERNEL);
+ if (!cio2)
+ return -ENOMEM;
+ cio2->pci_dev = pci_dev;
+
+ /*
+ * On some platforms no connections to sensors are defined in firmware,
+ * if the device has no endpoints then we can try to build those as
+ * software_nodes parsed from SSDB.
+ */
+ r = cio2_check_fwnode_graph(fwnode);
+ if (r) {
+ if (fwnode && !IS_ERR_OR_NULL(fwnode->secondary)) {
+ dev_err(&pci_dev->dev, "fwnode graph has no endpoints connected\n");
+ return -EINVAL;
+ }
+
+ r = cio2_bridge_init(pci_dev);
+ if (r)
+ return r;
+ }
+
+ r = pcim_enable_device(pci_dev);
+ if (r) {
+ dev_err(&pci_dev->dev, "failed to enable device (%d)\n", r);
+ return r;
+ }
+
+ dev_info(&pci_dev->dev, "device 0x%x (rev: 0x%x)\n",
+ pci_dev->device, pci_dev->revision);
+
+ r = pcim_iomap_regions(pci_dev, 1 << CIO2_PCI_BAR, pci_name(pci_dev));
+ if (r) {
+ dev_err(&pci_dev->dev, "failed to remap I/O memory (%d)\n", r);
+ return -ENODEV;
+ }
+
+ cio2->base = pcim_iomap_table(pci_dev)[CIO2_PCI_BAR];
+
+ pci_set_drvdata(pci_dev, cio2);
+
+ pci_set_master(pci_dev);
+
+ r = pci_set_dma_mask(pci_dev, CIO2_DMA_MASK);
+ if (r) {
+ dev_err(&pci_dev->dev, "failed to set DMA mask (%d)\n", r);
+ return -ENODEV;
+ }
+
+ r = pci_enable_msi(pci_dev);
+ if (r) {
+ dev_err(&pci_dev->dev, "failed to enable MSI (%d)\n", r);
+ return r;
+ }
+
+ r = cio2_fbpt_init_dummy(cio2);
+ if (r)
+ return r;
+
+ mutex_init(&cio2->lock);
+
+ cio2->media_dev.dev = &cio2->pci_dev->dev;
+ strscpy(cio2->media_dev.model, CIO2_DEVICE_NAME,
+ sizeof(cio2->media_dev.model));
+ snprintf(cio2->media_dev.bus_info, sizeof(cio2->media_dev.bus_info),
+ "PCI:%s", pci_name(cio2->pci_dev));
+ cio2->media_dev.hw_revision = 0;
+
+ media_device_init(&cio2->media_dev);
+ r = media_device_register(&cio2->media_dev);
+ if (r < 0)
+ goto fail_mutex_destroy;
+
+ cio2->v4l2_dev.mdev = &cio2->media_dev;
+ r = v4l2_device_register(&pci_dev->dev, &cio2->v4l2_dev);
+ if (r) {
+ dev_err(&pci_dev->dev,
+ "failed to register V4L2 device (%d)\n", r);
+ goto fail_media_device_unregister;
+ }
+
+ r = cio2_queues_init(cio2);
+ if (r)
+ goto fail_v4l2_device_unregister;
+
+ v4l2_async_notifier_init(&cio2->notifier);
+
+ /* Register notifier for subdevices we care */
+ r = cio2_parse_firmware(cio2);
+ if (r)
+ goto fail_clean_notifier;
+
+ r = devm_request_irq(&pci_dev->dev, pci_dev->irq, cio2_irq,
+ IRQF_SHARED, CIO2_NAME, cio2);
+ if (r) {
+ dev_err(&pci_dev->dev, "failed to request IRQ (%d)\n", r);
+ goto fail_clean_notifier;
+ }
+
+ pm_runtime_put_noidle(&pci_dev->dev);
+ pm_runtime_allow(&pci_dev->dev);
+
+ return 0;
+
+fail_clean_notifier:
+ v4l2_async_notifier_unregister(&cio2->notifier);
+ v4l2_async_notifier_cleanup(&cio2->notifier);
+ cio2_queues_exit(cio2);
+fail_v4l2_device_unregister:
+ v4l2_device_unregister(&cio2->v4l2_dev);
+fail_media_device_unregister:
+ media_device_unregister(&cio2->media_dev);
+ media_device_cleanup(&cio2->media_dev);
+fail_mutex_destroy:
+ mutex_destroy(&cio2->lock);
+ cio2_fbpt_exit_dummy(cio2);
+
+ return r;
+}
+
+static void cio2_pci_remove(struct pci_dev *pci_dev)
+{
+ struct cio2_device *cio2 = pci_get_drvdata(pci_dev);
+
+ media_device_unregister(&cio2->media_dev);
+ v4l2_async_notifier_unregister(&cio2->notifier);
+ v4l2_async_notifier_cleanup(&cio2->notifier);
+ cio2_queues_exit(cio2);
+ cio2_fbpt_exit_dummy(cio2);
+ v4l2_device_unregister(&cio2->v4l2_dev);
+ media_device_cleanup(&cio2->media_dev);
+ mutex_destroy(&cio2->lock);
+}
+
+static int __maybe_unused cio2_runtime_suspend(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct cio2_device *cio2 = pci_get_drvdata(pci_dev);
+ void __iomem *const base = cio2->base;
+ u16 pm;
+
+ writel(CIO2_D0I3C_I3, base + CIO2_REG_D0I3C);
+ dev_dbg(dev, "cio2 runtime suspend.\n");
+
+ pci_read_config_word(pci_dev, pci_dev->pm_cap + CIO2_PMCSR_OFFSET, &pm);
+ pm = (pm >> CIO2_PMCSR_D0D3_SHIFT) << CIO2_PMCSR_D0D3_SHIFT;
+ pm |= CIO2_PMCSR_D3;
+ pci_write_config_word(pci_dev, pci_dev->pm_cap + CIO2_PMCSR_OFFSET, pm);
+
+ return 0;
+}
+
+static int __maybe_unused cio2_runtime_resume(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct cio2_device *cio2 = pci_get_drvdata(pci_dev);
+ void __iomem *const base = cio2->base;
+ u16 pm;
+
+ writel(CIO2_D0I3C_RR, base + CIO2_REG_D0I3C);
+ dev_dbg(dev, "cio2 runtime resume.\n");
+
+ pci_read_config_word(pci_dev, pci_dev->pm_cap + CIO2_PMCSR_OFFSET, &pm);
+ pm = (pm >> CIO2_PMCSR_D0D3_SHIFT) << CIO2_PMCSR_D0D3_SHIFT;
+ pci_write_config_word(pci_dev, pci_dev->pm_cap + CIO2_PMCSR_OFFSET, pm);
+
+ return 0;
+}
+
+/*
+ * Helper function to advance all the elements of a circular buffer by "start"
+ * positions
+ */
+static void arrange(void *ptr, size_t elem_size, size_t elems, size_t start)
+{
+ struct {
+ size_t begin, end;
+ } arr[2] = {
+ { 0, start - 1 },
+ { start, elems - 1 },
+ };
+
+#define CHUNK_SIZE(a) ((a)->end - (a)->begin + 1)
+
+ /* Loop as long as we have out-of-place entries */
+ while (CHUNK_SIZE(&arr[0]) && CHUNK_SIZE(&arr[1])) {
+ size_t size0, i;
+
+ /*
+ * Find the number of entries that can be arranged on this
+ * iteration.
+ */
+ size0 = min(CHUNK_SIZE(&arr[0]), CHUNK_SIZE(&arr[1]));
+
+ /* Swap the entries in two parts of the array. */
+ for (i = 0; i < size0; i++) {
+ u8 *d = ptr + elem_size * (arr[1].begin + i);
+ u8 *s = ptr + elem_size * (arr[0].begin + i);
+ size_t j;
+
+ for (j = 0; j < elem_size; j++)
+ swap(d[j], s[j]);
+ }
+
+ if (CHUNK_SIZE(&arr[0]) > CHUNK_SIZE(&arr[1])) {
+ /* The end of the first array remains unarranged. */
+ arr[0].begin += size0;
+ } else {
+ /*
+ * The first array is fully arranged so we proceed
+ * handling the next one.
+ */
+ arr[0].begin = arr[1].begin;
+ arr[0].end = arr[1].begin + size0 - 1;
+ arr[1].begin += size0;
+ }
+ }
+}
+
+static void cio2_fbpt_rearrange(struct cio2_device *cio2, struct cio2_queue *q)
+{
+ unsigned int i, j;
+
+ for (i = 0, j = q->bufs_first; i < CIO2_MAX_BUFFERS;
+ i++, j = (j + 1) % CIO2_MAX_BUFFERS)
+ if (q->bufs[j])
+ break;
+
+ if (i == CIO2_MAX_BUFFERS)
+ return;
+
+ if (j) {
+ arrange(q->fbpt, sizeof(struct cio2_fbpt_entry) * CIO2_MAX_LOPS,
+ CIO2_MAX_BUFFERS, j);
+ arrange(q->bufs, sizeof(struct cio2_buffer *),
+ CIO2_MAX_BUFFERS, j);
+ }
+
+ /*
+ * DMA clears the valid bit when accessing the buffer.
+ * When stopping stream in suspend callback, some of the buffers
+ * may be in invalid state. After resume, when DMA meets the invalid
+ * buffer, it will halt and stop receiving new data.
+ * To avoid DMA halting, set the valid bit for all buffers in FBPT.
+ */
+ for (i = 0; i < CIO2_MAX_BUFFERS; i++)
+ cio2_fbpt_entry_enable(cio2, q->fbpt + i * CIO2_MAX_LOPS);
+}
+
+static int __maybe_unused cio2_suspend(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct cio2_device *cio2 = pci_get_drvdata(pci_dev);
+ struct cio2_queue *q = cio2->cur_queue;
+
+ dev_dbg(dev, "cio2 suspend\n");
+ if (!cio2->streaming)
+ return 0;
+
+ /* Stop stream */
+ cio2_hw_exit(cio2, q);
+ synchronize_irq(pci_dev->irq);
+
+ pm_runtime_force_suspend(dev);
+
+ /*
+ * Upon resume, hw starts to process the fbpt entries from beginning,
+ * so relocate the queued buffs to the fbpt head before suspend.
+ */
+ cio2_fbpt_rearrange(cio2, q);
+ q->bufs_first = 0;
+ q->bufs_next = 0;
+
+ return 0;
+}
+
+static int __maybe_unused cio2_resume(struct device *dev)
+{
+ struct cio2_device *cio2 = dev_get_drvdata(dev);
+ struct cio2_queue *q = cio2->cur_queue;
+ int r;
+
+ dev_dbg(dev, "cio2 resume\n");
+ if (!cio2->streaming)
+ return 0;
+ /* Start stream */
+ r = pm_runtime_force_resume(&cio2->pci_dev->dev);
+ if (r < 0) {
+ dev_err(&cio2->pci_dev->dev,
+ "failed to set power %d\n", r);
+ return r;
+ }
+
+ r = cio2_hw_init(cio2, q);
+ if (r)
+ dev_err(dev, "fail to init cio2 hw\n");
+
+ return r;
+}
+
+static const struct dev_pm_ops cio2_pm_ops = {
+ SET_RUNTIME_PM_OPS(&cio2_runtime_suspend, &cio2_runtime_resume, NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(&cio2_suspend, &cio2_resume)
+};
+
+static const struct pci_device_id cio2_pci_id_table[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, CIO2_PCI_ID) },
+ { }
+};
+
+MODULE_DEVICE_TABLE(pci, cio2_pci_id_table);
+
+static struct pci_driver cio2_pci_driver = {
+ .name = CIO2_NAME,
+ .id_table = cio2_pci_id_table,
+ .probe = cio2_pci_probe,
+ .remove = cio2_pci_remove,
+ .driver = {
+ .pm = &cio2_pm_ops,
+ },
+};
+
+module_pci_driver(cio2_pci_driver);
+
+MODULE_AUTHOR("Tuukka Toivonen <tuukka.toivonen@intel.com>");
+MODULE_AUTHOR("Tianshu Qiu <tian.shu.qiu@intel.com>");
+MODULE_AUTHOR("Jian Xu Zheng");
+MODULE_AUTHOR("Yuning Pu <yuning.pu@intel.com>");
+MODULE_AUTHOR("Yong Zhi <yong.zhi@intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("IPU3 CIO2 driver");
projects / linux-2.6-microblaze.git / commitdiff