diff options
Diffstat (limited to 'drivers/media/platform/qcom/camss/camss-csid-340.c')
| -rw-r--r-- | drivers/media/platform/qcom/camss/camss-csid-340.c | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/drivers/media/platform/qcom/camss/camss-csid-340.c b/drivers/media/platform/qcom/camss/camss-csid-340.c new file mode 100644 index 000000000000..22a30510fb79 --- /dev/null +++ b/drivers/media/platform/qcom/camss/camss-csid-340.c @@ -0,0 +1,190 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Qualcomm MSM Camera Subsystem - CSID (CSI Decoder) Module 340 + * + * Copyright (c) 2025 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#include <linux/completion.h> +#include <linux/bitfield.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/kernel.h> + +#include "camss.h" +#include "camss-csid.h" +#include "camss-csid-gen2.h" + +#define CSID_RST_STROBES (0x010) +#define CSID_RST_SW_REGS BIT(0) +#define CSID_RST_IRQ BIT(1) +#define CSID_RST_IFE_CLK BIT(2) +#define CSID_RST_PHY_CLK BIT(3) +#define CSID_RST_CSID_CLK BIT(4) + +#define CSID_IRQ_STATUS (0x070) +#define CSID_IRQ_MASK (0x074) +#define CSID_IRQ_MASK_RST_DONE BIT(0) +#define CSID_IRQ_CLEAR (0x078) +#define CSID_IRQ_CMD (0x080) +#define CSID_IRQ_CMD_CLEAR BIT(0) + +#define CSID_CSI2_RX_CFG0 (0x100) +#define CSI2_RX_CFG0_NUM_ACTIVE_LANES_MASK GENMASK(1, 0) +#define CSI2_RX_CFG0_DLX_INPUT_SEL_MASK GENMASK(17, 4) +#define CSI2_RX_CFG0_PHY_NUM_SEL_MASK GENMASK(21, 20) +#define CSI2_RX_CFG0_PHY_NUM_SEL_BASE_IDX 1 +#define CSI2_RX_CFG0_PHY_TYPE_SEL BIT(24) + +#define CSID_CSI2_RX_CFG1 (0x104) +#define CSI2_RX_CFG1_PACKET_ECC_CORRECTION_EN BIT(0) +#define CSI2_RX_CFG1_MISR_EN BIT(6) +#define CSI2_RX_CFG1_CGC_MODE BIT(7) + +#define CSID_RDI_CFG0(rdi) (0x300 + 0x100 * (rdi)) +#define CSID_RDI_CFG0_BYTE_CNTR_EN BIT(0) +#define CSID_RDI_CFG0_TIMESTAMP_EN BIT(1) +#define CSID_RDI_CFG0_DECODE_FORMAT_MASK GENMASK(15, 12) +#define CSID_RDI_CFG0_DECODE_FORMAT_NOP CSID_RDI_CFG0_DECODE_FORMAT_MASK +#define CSID_RDI_CFG0_DT_MASK GENMASK(21, 16) +#define CSID_RDI_CFG0_VC_MASK GENMASK(23, 22) +#define CSID_RDI_CFG0_DTID_MASK GENMASK(28, 27) +#define CSID_RDI_CFG0_ENABLE BIT(31) + +#define CSID_RDI_CTRL(rdi) (0x308 + 0x100 * (rdi)) +#define CSID_RDI_CTRL_HALT_AT_FRAME_BOUNDARY 0 +#define CSID_RDI_CTRL_RESUME_AT_FRAME_BOUNDARY 1 + +static void __csid_configure_rx(struct csid_device *csid, + struct csid_phy_config *phy, int vc) +{ + u32 val; + + val = FIELD_PREP(CSI2_RX_CFG0_NUM_ACTIVE_LANES_MASK, phy->lane_cnt - 1); + val |= FIELD_PREP(CSI2_RX_CFG0_DLX_INPUT_SEL_MASK, phy->lane_assign); + val |= FIELD_PREP(CSI2_RX_CFG0_PHY_NUM_SEL_MASK, + phy->csiphy_id + CSI2_RX_CFG0_PHY_NUM_SEL_BASE_IDX); + writel_relaxed(val, csid->base + CSID_CSI2_RX_CFG0); + + val = CSI2_RX_CFG1_PACKET_ECC_CORRECTION_EN; + writel_relaxed(val, csid->base + CSID_CSI2_RX_CFG1); +} + +static void __csid_ctrl_rdi(struct csid_device *csid, int enable, u8 rdi) +{ + writel_relaxed(!!enable, csid->base + CSID_RDI_CTRL(rdi)); +} + +static void __csid_configure_rdi_stream(struct csid_device *csid, u8 enable, u8 vc) +{ + struct v4l2_mbus_framefmt *input_format = &csid->fmt[MSM_CSID_PAD_FIRST_SRC + vc]; + const struct csid_format_info *format = csid_get_fmt_entry(csid->res->formats->formats, + csid->res->formats->nformats, + input_format->code); + u8 lane_cnt = csid->phy.lane_cnt; + u8 dt_id; + u32 val; + + if (!lane_cnt) + lane_cnt = 4; + + /* + * DT_ID is a two bit bitfield that is concatenated with + * the four least significant bits of the five bit VC + * bitfield to generate an internal CID value. + * + * CSID_RDI_CFG0(vc) + * DT_ID : 28:27 + * VC : 26:22 + * DT : 21:16 + * + * CID : VC 3:0 << 2 | DT_ID 1:0 + */ + dt_id = vc & 0x03; + + val = CSID_RDI_CFG0_DECODE_FORMAT_NOP; /* only for RDI path */ + val |= FIELD_PREP(CSID_RDI_CFG0_DT_MASK, format->data_type); + val |= FIELD_PREP(CSID_RDI_CFG0_VC_MASK, vc); + val |= FIELD_PREP(CSID_RDI_CFG0_DTID_MASK, dt_id); + + if (enable) + val |= CSID_RDI_CFG0_ENABLE; + + dev_dbg(csid->camss->dev, "CSID%u: Stream %s (dt:0x%x vc=%u)\n", + csid->id, enable ? "enable" : "disable", format->data_type, vc); + + writel_relaxed(val, csid->base + CSID_RDI_CFG0(vc)); +} + +static void csid_configure_stream(struct csid_device *csid, u8 enable) +{ + int i; + + for (i = 0; i < MSM_CSID_MAX_SRC_STREAMS; i++) { + if (csid->phy.en_vc & BIT(i)) { + __csid_configure_rdi_stream(csid, enable, i); + __csid_configure_rx(csid, &csid->phy, i); + __csid_ctrl_rdi(csid, enable, i); + } + } +} + +static int csid_reset(struct csid_device *csid) +{ + unsigned long time; + + writel_relaxed(CSID_IRQ_MASK_RST_DONE, csid->base + CSID_IRQ_MASK); + writel_relaxed(CSID_IRQ_MASK_RST_DONE, csid->base + CSID_IRQ_CLEAR); + writel_relaxed(CSID_IRQ_CMD_CLEAR, csid->base + CSID_IRQ_CMD); + + reinit_completion(&csid->reset_complete); + + /* Reset with registers preserved */ + writel(CSID_RST_IRQ | CSID_RST_IFE_CLK | CSID_RST_PHY_CLK | CSID_RST_CSID_CLK, + csid->base + CSID_RST_STROBES); + + time = wait_for_completion_timeout(&csid->reset_complete, + msecs_to_jiffies(CSID_RESET_TIMEOUT_MS)); + if (!time) { + dev_err(csid->camss->dev, "CSID%u: reset timeout\n", csid->id); + return -EIO; + } + + dev_dbg(csid->camss->dev, "CSID%u: reset done\n", csid->id); + + return 0; +} + +static irqreturn_t csid_isr(int irq, void *dev) +{ + struct csid_device *csid = dev; + u32 val; + + val = readl_relaxed(csid->base + CSID_IRQ_STATUS); + writel_relaxed(val, csid->base + CSID_IRQ_CLEAR); + writel_relaxed(CSID_IRQ_CMD_CLEAR, csid->base + CSID_IRQ_CMD); + + if (val & CSID_IRQ_MASK_RST_DONE) + complete(&csid->reset_complete); + else + dev_warn_ratelimited(csid->camss->dev, "Spurious CSID interrupt\n"); + + return IRQ_HANDLED; +} + +static int csid_configure_testgen_pattern(struct csid_device *csid, s32 val) +{ + return -EOPNOTSUPP; /* Not part of CSID */ +} + +static void csid_subdev_init(struct csid_device *csid) {} + +const struct csid_hw_ops csid_ops_340 = { + .configure_testgen_pattern = csid_configure_testgen_pattern, + .configure_stream = csid_configure_stream, + .hw_version = csid_hw_version, + .isr = csid_isr, + .reset = csid_reset, + .src_pad_code = csid_src_pad_code, + .subdev_init = csid_subdev_init, +}; |