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linux/drivers/media/platform/amlogic/c3/mipi-csi2/c3-mipi-csi2.c
Jacopo Mondi 1b83a9f41b media: amlogic: c3-mipi-csi2: Handle 64-bits division 
The kernel test robot reports the following error when building on
Hexagon with hexagon-allmodconfig.

ERROR: modpost: "__hexagon_divdi3"
[drivers/media/platform/amlogic/c3/mipi-csi2/c3-mipi-csi2.ko] undefined!

The error is caused by using DIV_ROUND_UP() with a 64 bits divisor with
a 32-bit dividend, which on Hexagon and clang-17 is resolved with a call
to the __hexagon_divdi3() helper function, part of the compiler support
library and not available when building Linux.

Use DIV_ROUND_UP_ULL() to fix the build error and avoid calling the
__hexagon_divdi3() helper function.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202505101334.UHxNcUUO-lkp@intel.com/
Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
2025-05-10 12:11:02 +02:00

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// SPDX-License-Identifier: (GPL-2.0-only OR MIT)
/*
* Copyright (C) 2024 Amlogic, Inc. All rights reserved
*/
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/math.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <media/v4l2-async.h>
#include <media/v4l2-common.h>
#include <media/v4l2-device.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-mc.h>
#include <media/v4l2-subdev.h>
/* C3 CSI-2 submodule definition */
enum {
SUBMD_APHY,
SUBMD_DPHY,
SUBMD_HOST,
};
#define CSI2_SUBMD_MASK GENMASK(17, 16)
#define CSI2_SUBMD_SHIFT 16
#define CSI2_SUBMD(x) (((x) & (CSI2_SUBMD_MASK)) >> (CSI2_SUBMD_SHIFT))
#define CSI2_REG_ADDR_MASK GENMASK(15, 0)
#define CSI2_REG_ADDR(x) ((x) & (CSI2_REG_ADDR_MASK))
#define CSI2_REG_A(x) ((SUBMD_APHY << CSI2_SUBMD_SHIFT) | (x))
#define CSI2_REG_D(x) ((SUBMD_DPHY << CSI2_SUBMD_SHIFT) | (x))
#define CSI2_REG_H(x) ((SUBMD_HOST << CSI2_SUBMD_SHIFT) | (x))
#define MIPI_CSI2_CLOCK_NUM_MAX 3
#define MIPI_CSI2_SUBDEV_NAME "c3-mipi-csi2"
/* C3 CSI-2 APHY register */
#define CSI_PHY_CNTL0 CSI2_REG_A(0x44)
#define CSI_PHY_CNTL0_HS_LP_BIAS_EN BIT(10)
#define CSI_PHY_CNTL0_HS_RX_TRIM_11 (11 << 11)
#define CSI_PHY_CNTL0_LP_LOW_VTH_2 (2 << 16)
#define CSI_PHY_CNTL0_LP_HIGH_VTH_4 (4 << 20)
#define CSI_PHY_CNTL0_DATA_LANE0_HS_DIG_EN BIT(24)
#define CSI_PHY_CNTL0_DATA_LANE1_HS_DIG_EN BIT(25)
#define CSI_PHY_CNTL0_CLK0_LANE_HS_DIG_EN BIT(26)
#define CSI_PHY_CNTL0_DATA_LANE2_HS_DIG_EN BIT(27)
#define CSI_PHY_CNTL0_DATA_LANE3_HS_DIG_EN BIT(28)
#define CSI_PHY_CNTL1 CSI2_REG_A(0x48)
#define CSI_PHY_CNTL1_HS_EQ_CAP_SMALL (2 << 16)
#define CSI_PHY_CNTL1_HS_EQ_CAP_BIG (3 << 16)
#define CSI_PHY_CNTL1_HS_EQ_RES_MIN (3 << 18)
#define CSI_PHY_CNTL1_HS_EQ_RES_MED (2 << 18)
#define CSI_PHY_CNTL1_HS_EQ_RES_MAX BIT(18)
#define CSI_PHY_CNTL1_CLK_CHN_EQ_MAX_GAIN BIT(20)
#define CSI_PHY_CNTL1_DATA_CHN_EQ_MAX_GAIN BIT(21)
#define CSI_PHY_CNTL1_COM_BG_EN BIT(24)
#define CSI_PHY_CNTL1_HS_SYNC_EN BIT(25)
/* C3 CSI-2 DPHY register */
#define MIPI_PHY_CTRL CSI2_REG_D(0x00)
#define MIPI_PHY_CTRL_DATA_LANE0_EN (0 << 0)
#define MIPI_PHY_CTRL_DATA_LANE0_DIS BIT(0)
#define MIPI_PHY_CTRL_DATA_LANE1_EN (0 << 1)
#define MIPI_PHY_CTRL_DATA_LANE1_DIS BIT(1)
#define MIPI_PHY_CTRL_DATA_LANE2_EN (0 << 2)
#define MIPI_PHY_CTRL_DATA_LANE2_DIS BIT(2)
#define MIPI_PHY_CTRL_DATA_LANE3_EN (0 << 3)
#define MIPI_PHY_CTRL_DATA_LANE3_DIS BIT(3)
#define MIPI_PHY_CTRL_CLOCK_LANE_EN (0 << 4)
#define MIPI_PHY_CTRL_CLOCK_LANE_DIS BIT(4)
#define MIPI_PHY_CLK_LANE_CTRL CSI2_REG_D(0x04)
#define MIPI_PHY_CLK_LANE_CTRL_FORCE_ULPS_ENTER BIT(0)
#define MIPI_PHY_CLK_LANE_CTRL_FORCE_ULPS_EXIT BIT(1)
#define MIPI_PHY_CLK_LANE_CTRL_TCLK_ZERO_HS (0 << 3)
#define MIPI_PHY_CLK_LANE_CTRL_TCLK_ZERO_HS_2 BIT(3)
#define MIPI_PHY_CLK_LANE_CTRL_TCLK_ZERO_HS_4 (2 << 3)
#define MIPI_PHY_CLK_LANE_CTRL_TCLK_ZERO_HS_8 (3 << 3)
#define MIPI_PHY_CLK_LANE_CTRL_TCLK_ZERO_HS_16 (4 << 3)
#define MIPI_PHY_CLK_LANE_CTRL_TCLK_ZERO_EN BIT(6)
#define MIPI_PHY_CLK_LANE_CTRL_LPEN_DIS BIT(7)
#define MIPI_PHY_CLK_LANE_CTRL_END_EN BIT(8)
#define MIPI_PHY_CLK_LANE_CTRL_HS_RX_EN BIT(9)
#define MIPI_PHY_DATA_LANE_CTRL1 CSI2_REG_D(0x0c)
#define MIPI_PHY_DATA_LANE_CTRL1_INSERT_ERRESC BIT(0)
#define MIPI_PHY_DATA_LANE_CTRL1_HS_SYNC_CHK_EN BIT(1)
#define MIPI_PHY_DATA_LANE_CTRL1_PIPE_MASK GENMASK(6, 2)
#define MIPI_PHY_DATA_LANE_CTRL1_PIPE_ALL_EN (0x1f << 2)
#define MIPI_PHY_DATA_LANE_CTRL1_PIPE_DELAY_MASK GENMASK(9, 7)
#define MIPI_PHY_DATA_LANE_CTRL1_PIPE_DELAY_3 (3 << 7)
#define MIPI_PHY_TCLK_MISS CSI2_REG_D(0x10)
#define MIPI_PHY_TCLK_MISS_CYCLES_MASK GENMASK(7, 0)
#define MIPI_PHY_TCLK_MISS_CYCLES_9 (9 << 0)
#define MIPI_PHY_TCLK_SETTLE CSI2_REG_D(0x14)
#define MIPI_PHY_TCLK_SETTLE_CYCLES_MASK GENMASK(7, 0)
#define MIPI_PHY_TCLK_SETTLE_CYCLES_31 (31 << 0)
#define MIPI_PHY_THS_EXIT CSI2_REG_D(0x18)
#define MIPI_PHY_THS_EXIT_CYCLES_MASK GENMASK(7, 0)
#define MIPI_PHY_THS_EXIT_CYCLES_8 (8 << 0)
#define MIPI_PHY_THS_SKIP CSI2_REG_D(0x1c)
#define MIPI_PHY_THS_SKIP_CYCLES_MASK GENMASK(7, 0)
#define MIPI_PHY_THS_SKIP_CYCLES_10 (10 << 0)
#define MIPI_PHY_THS_SETTLE CSI2_REG_D(0x20)
#define MIPI_PHY_THS_SETTLE_CYCLES_MASK GENMASK(7, 0)
#define MIPI_PHY_TINIT CSI2_REG_D(0x24)
#define MIPI_PHY_TINIT_CYCLES_MASK GENMASK(31, 0)
#define MIPI_PHY_TINIT_CYCLES_20000 (20000 << 0)
#define MIPI_PHY_TULPS_C CSI2_REG_D(0x28)
#define MIPI_PHY_TULPS_C_CYCLES_MASK GENMASK(31, 0)
#define MIPI_PHY_TULPS_C_CYCLES_4096 (4096 << 0)
#define MIPI_PHY_TULPS_S CSI2_REG_D(0x2c)
#define MIPI_PHY_TULPS_S_CYCLES_MASK GENMASK(31, 0)
#define MIPI_PHY_TULPS_S_CYCLES_256 (256 << 0)
#define MIPI_PHY_TMBIAS CSI2_REG_D(0x30)
#define MIPI_PHY_TMBIAS_CYCLES_MASK GENMASK(31, 0)
#define MIPI_PHY_TMBIAS_CYCLES_256 (256 << 0)
#define MIPI_PHY_TLP_EN_W CSI2_REG_D(0x34)
#define MIPI_PHY_TLP_EN_W_CYCLES_MASK GENMASK(31, 0)
#define MIPI_PHY_TLP_EN_W_CYCLES_12 (12 << 0)
#define MIPI_PHY_TLPOK CSI2_REG_D(0x38)
#define MIPI_PHY_TLPOK_CYCLES_MASK GENMASK(31, 0)
#define MIPI_PHY_TLPOK_CYCLES_256 (256 << 0)
#define MIPI_PHY_TWD_INIT CSI2_REG_D(0x3c)
#define MIPI_PHY_TWD_INIT_DOG_MASK GENMASK(31, 0)
#define MIPI_PHY_TWD_INIT_DOG_0X400000 (0x400000 << 0)
#define MIPI_PHY_TWD_HS CSI2_REG_D(0x40)
#define MIPI_PHY_TWD_HS_DOG_MASK GENMASK(31, 0)
#define MIPI_PHY_TWD_HS_DOG_0X400000 (0x400000 << 0)
#define MIPI_PHY_MUX_CTRL0 CSI2_REG_D(0x284)
#define MIPI_PHY_MUX_CTRL0_SFEN3_SRC_MASK GENMASK(3, 0)
#define MIPI_PHY_MUX_CTRL0_SFEN3_SRC_LANE0 (0 << 0)
#define MIPI_PHY_MUX_CTRL0_SFEN3_SRC_LANE1 BIT(0)
#define MIPI_PHY_MUX_CTRL0_SFEN3_SRC_LANE2 (2 << 0)
#define MIPI_PHY_MUX_CTRL0_SFEN3_SRC_LANE3 (3 << 0)
#define MIPI_PHY_MUX_CTRL0_SFEN2_SRC_MASK GENMASK(7, 4)
#define MIPI_PHY_MUX_CTRL0_SFEN2_SRC_LANE0 (0 << 4)
#define MIPI_PHY_MUX_CTRL0_SFEN2_SRC_LANE1 BIT(4)
#define MIPI_PHY_MUX_CTRL0_SFEN2_SRC_LANE2 (2 << 4)
#define MIPI_PHY_MUX_CTRL0_SFEN2_SRC_LANE3 (3 << 4)
#define MIPI_PHY_MUX_CTRL0_SFEN1_SRC_MASK GENMASK(11, 8)
#define MIPI_PHY_MUX_CTRL0_SFEN1_SRC_LANE0 (0 << 8)
#define MIPI_PHY_MUX_CTRL0_SFEN1_SRC_LANE1 BIT(8)
#define MIPI_PHY_MUX_CTRL0_SFEN1_SRC_LANE2 (2 << 8)
#define MIPI_PHY_MUX_CTRL0_SFEN1_SRC_LANE3 (3 << 8)
#define MIPI_PHY_MUX_CTRL0_SFEN0_SRC_MASK GENMASK(14, 12)
#define MIPI_PHY_MUX_CTRL0_SFEN0_SRC_LANE0 (0 << 12)
#define MIPI_PHY_MUX_CTRL0_SFEN0_SRC_LANE1 BIT(12)
#define MIPI_PHY_MUX_CTRL0_SFEN0_SRC_LANE2 (2 << 12)
#define MIPI_PHY_MUX_CTRL0_SFEN0_SRC_LANE3 (3 << 12)
#define MIPI_PHY_MUX_CTRL1 CSI2_REG_D(0x288)
#define MIPI_PHY_MUX_CTRL1_LANE3_SRC_MASK GENMASK(3, 0)
#define MIPI_PHY_MUX_CTRL1_LANE3_SRC_SFEN0 (0 << 0)
#define MIPI_PHY_MUX_CTRL1_LANE3_SRC_SFEN1 BIT(0)
#define MIPI_PHY_MUX_CTRL1_LANE3_SRC_SFEN2 (2 << 0)
#define MIPI_PHY_MUX_CTRL1_LANE3_SRC_SFEN3 (3 << 0)
#define MIPI_PHY_MUX_CTRL1_LANE2_SRC_MASK GENMASK(7, 4)
#define MIPI_PHY_MUX_CTRL1_LANE2_SRC_SFEN0 (0 << 4)
#define MIPI_PHY_MUX_CTRL1_LANE2_SRC_SFEN1 BIT(4)
#define MIPI_PHY_MUX_CTRL1_LANE2_SRC_SFEN2 (2 << 4)
#define MIPI_PHY_MUX_CTRL1_LANE2_SRC_SFEN3 (3 << 4)
#define MIPI_PHY_MUX_CTRL1_LANE1_SRC_MASK GENMASK(11, 8)
#define MIPI_PHY_MUX_CTRL1_LANE1_SRC_SFEN0 (0 << 8)
#define MIPI_PHY_MUX_CTRL1_LANE1_SRC_SFEN1 BIT(8)
#define MIPI_PHY_MUX_CTRL1_LANE1_SRC_SFEN2 (2 << 8)
#define MIPI_PHY_MUX_CTRL1_LANE1_SRC_SFEN3 (3 << 8)
#define MIPI_PHY_MUX_CTRL1_LANE0_SRC_MASK GENMASK(14, 12)
#define MIPI_PHY_MUX_CTRL1_LANE0_SRC_SFEN0 (0 << 12)
#define MIPI_PHY_MUX_CTRL1_LANE0_SRC_SFEN1 BIT(12)
#define MIPI_PHY_MUX_CTRL1_LANE0_SRC_SFEN2 (2 << 12)
#define MIPI_PHY_MUX_CTRL1_LANE0_SRC_SFEN3 (3 << 12)
/* C3 CSI-2 HOST register */
#define CSI2_HOST_N_LANES CSI2_REG_H(0x04)
#define CSI2_HOST_N_LANES_MASK GENMASK(1, 0)
#define CSI2_HOST_N_LANES_1 (0 << 0)
#define CSI2_HOST_N_LANES_2 BIT(0)
#define CSI2_HOST_N_LANES_3 (2 << 0)
#define CSI2_HOST_N_LANES_4 (3 << 0)
#define CSI2_HOST_CSI2_RESETN CSI2_REG_H(0x10)
#define CSI2_HOST_CSI2_RESETN_MASK BIT(0)
#define CSI2_HOST_CSI2_RESETN_ACTIVE (0 << 0)
#define CSI2_HOST_CSI2_RESETN_EXIT BIT(0)
#define C3_MIPI_CSI2_MAX_WIDTH 2888
#define C3_MIPI_CSI2_MIN_WIDTH 160
#define C3_MIPI_CSI2_MAX_HEIGHT 2240
#define C3_MIPI_CSI2_MIN_HEIGHT 120
#define C3_MIPI_CSI2_DEFAULT_WIDTH 1920
#define C3_MIPI_CSI2_DEFAULT_HEIGHT 1080
#define C3_MIPI_CSI2_DEFAULT_FMT MEDIA_BUS_FMT_SRGGB10_1X10
/* C3 CSI-2 pad list */
enum {
C3_MIPI_CSI2_PAD_SINK,
C3_MIPI_CSI2_PAD_SRC,
C3_MIPI_CSI2_PAD_MAX
};
/*
* struct c3_csi_info - MIPI CSI2 information
*
* @clocks: array of MIPI CSI2 clock names
* @clock_num: actual clock number
*/
struct c3_csi_info {
char *clocks[MIPI_CSI2_CLOCK_NUM_MAX];
u32 clock_num;
};
/*
* struct c3_csi_device - MIPI CSI2 platform device
*
* @dev: pointer to the struct device
* @aphy: MIPI CSI2 aphy register address
* @dphy: MIPI CSI2 dphy register address
* @host: MIPI CSI2 host register address
* @clks: array of MIPI CSI2 clocks
* @sd: MIPI CSI2 sub-device
* @pads: MIPI CSI2 sub-device pads
* @notifier: notifier to register on the v4l2-async API
* @src_pad: source sub-device pad
* @bus: MIPI CSI2 bus information
* @info: version-specific MIPI CSI2 information
*/
struct c3_csi_device {
struct device *dev;
void __iomem *aphy;
void __iomem *dphy;
void __iomem *host;
struct clk_bulk_data clks[MIPI_CSI2_CLOCK_NUM_MAX];
struct v4l2_subdev sd;
struct media_pad pads[C3_MIPI_CSI2_PAD_MAX];
struct v4l2_async_notifier notifier;
struct media_pad *src_pad;
struct v4l2_mbus_config_mipi_csi2 bus;
const struct c3_csi_info *info;
};
static const u32 c3_mipi_csi_formats[] = {
MEDIA_BUS_FMT_SBGGR10_1X10,
MEDIA_BUS_FMT_SGBRG10_1X10,
MEDIA_BUS_FMT_SGRBG10_1X10,
MEDIA_BUS_FMT_SRGGB10_1X10,
MEDIA_BUS_FMT_SBGGR12_1X12,
MEDIA_BUS_FMT_SGBRG12_1X12,
MEDIA_BUS_FMT_SGRBG12_1X12,
MEDIA_BUS_FMT_SRGGB12_1X12,
};
/* Hardware configuration */
static void c3_mipi_csi_write(struct c3_csi_device *csi, u32 reg, u32 val)
{
void __iomem *addr;
switch (CSI2_SUBMD(reg)) {
case SUBMD_APHY:
addr = csi->aphy + CSI2_REG_ADDR(reg);
break;
case SUBMD_DPHY:
addr = csi->dphy + CSI2_REG_ADDR(reg);
break;
case SUBMD_HOST:
addr = csi->host + CSI2_REG_ADDR(reg);
break;
default:
dev_err(csi->dev, "Invalid sub-module: %lu\n", CSI2_SUBMD(reg));
return;
}
writel(val, addr);
}
static void c3_mipi_csi_cfg_aphy(struct c3_csi_device *csi)
{
c3_mipi_csi_write(csi, CSI_PHY_CNTL0,
CSI_PHY_CNTL0_HS_LP_BIAS_EN |
CSI_PHY_CNTL0_HS_RX_TRIM_11 |
CSI_PHY_CNTL0_LP_LOW_VTH_2 |
CSI_PHY_CNTL0_LP_HIGH_VTH_4 |
CSI_PHY_CNTL0_DATA_LANE0_HS_DIG_EN |
CSI_PHY_CNTL0_DATA_LANE1_HS_DIG_EN |
CSI_PHY_CNTL0_CLK0_LANE_HS_DIG_EN |
CSI_PHY_CNTL0_DATA_LANE2_HS_DIG_EN |
CSI_PHY_CNTL0_DATA_LANE3_HS_DIG_EN);
c3_mipi_csi_write(csi, CSI_PHY_CNTL1,
CSI_PHY_CNTL1_HS_EQ_CAP_SMALL |
CSI_PHY_CNTL1_HS_EQ_RES_MED |
CSI_PHY_CNTL1_CLK_CHN_EQ_MAX_GAIN |
CSI_PHY_CNTL1_DATA_CHN_EQ_MAX_GAIN |
CSI_PHY_CNTL1_COM_BG_EN |
CSI_PHY_CNTL1_HS_SYNC_EN);
}
static void c3_mipi_csi_cfg_dphy(struct c3_csi_device *csi, s64 rate)
{
u32 val;
u32 settle;
/* Calculate the high speed settle */
val = DIV_ROUND_UP_ULL(1000000000, rate);
settle = (16 * val + 230) / 10;
c3_mipi_csi_write(csi, MIPI_PHY_CLK_LANE_CTRL,
MIPI_PHY_CLK_LANE_CTRL_HS_RX_EN |
MIPI_PHY_CLK_LANE_CTRL_END_EN |
MIPI_PHY_CLK_LANE_CTRL_LPEN_DIS |
MIPI_PHY_CLK_LANE_CTRL_TCLK_ZERO_EN |
MIPI_PHY_CLK_LANE_CTRL_TCLK_ZERO_HS_8);
c3_mipi_csi_write(csi, MIPI_PHY_TCLK_MISS, MIPI_PHY_TCLK_MISS_CYCLES_9);
c3_mipi_csi_write(csi, MIPI_PHY_TCLK_SETTLE,
MIPI_PHY_TCLK_SETTLE_CYCLES_31);
c3_mipi_csi_write(csi, MIPI_PHY_THS_EXIT, MIPI_PHY_THS_EXIT_CYCLES_8);
c3_mipi_csi_write(csi, MIPI_PHY_THS_SKIP, MIPI_PHY_THS_SKIP_CYCLES_10);
c3_mipi_csi_write(csi, MIPI_PHY_THS_SETTLE, settle);
c3_mipi_csi_write(csi, MIPI_PHY_TINIT, MIPI_PHY_TINIT_CYCLES_20000);
c3_mipi_csi_write(csi, MIPI_PHY_TMBIAS, MIPI_PHY_TMBIAS_CYCLES_256);
c3_mipi_csi_write(csi, MIPI_PHY_TULPS_C, MIPI_PHY_TULPS_C_CYCLES_4096);
c3_mipi_csi_write(csi, MIPI_PHY_TULPS_S, MIPI_PHY_TULPS_S_CYCLES_256);
c3_mipi_csi_write(csi, MIPI_PHY_TLP_EN_W, MIPI_PHY_TLP_EN_W_CYCLES_12);
c3_mipi_csi_write(csi, MIPI_PHY_TLPOK, MIPI_PHY_TLPOK_CYCLES_256);
c3_mipi_csi_write(csi, MIPI_PHY_TWD_INIT,
MIPI_PHY_TWD_INIT_DOG_0X400000);
c3_mipi_csi_write(csi, MIPI_PHY_TWD_HS, MIPI_PHY_TWD_HS_DOG_0X400000);
c3_mipi_csi_write(csi, MIPI_PHY_DATA_LANE_CTRL1,
MIPI_PHY_DATA_LANE_CTRL1_INSERT_ERRESC |
MIPI_PHY_DATA_LANE_CTRL1_HS_SYNC_CHK_EN |
MIPI_PHY_DATA_LANE_CTRL1_PIPE_ALL_EN |
MIPI_PHY_DATA_LANE_CTRL1_PIPE_DELAY_3);
/* Set the order of lanes */
c3_mipi_csi_write(csi, MIPI_PHY_MUX_CTRL0,
MIPI_PHY_MUX_CTRL0_SFEN3_SRC_LANE3 |
MIPI_PHY_MUX_CTRL0_SFEN2_SRC_LANE2 |
MIPI_PHY_MUX_CTRL0_SFEN1_SRC_LANE1 |
MIPI_PHY_MUX_CTRL0_SFEN0_SRC_LANE0);
c3_mipi_csi_write(csi, MIPI_PHY_MUX_CTRL1,
MIPI_PHY_MUX_CTRL1_LANE3_SRC_SFEN3 |
MIPI_PHY_MUX_CTRL1_LANE2_SRC_SFEN2 |
MIPI_PHY_MUX_CTRL1_LANE1_SRC_SFEN1 |
MIPI_PHY_MUX_CTRL1_LANE0_SRC_SFEN0);
/* Enable digital data and clock lanes */
c3_mipi_csi_write(csi, MIPI_PHY_CTRL,
MIPI_PHY_CTRL_DATA_LANE0_EN |
MIPI_PHY_CTRL_DATA_LANE1_EN |
MIPI_PHY_CTRL_DATA_LANE2_EN |
MIPI_PHY_CTRL_DATA_LANE3_EN |
MIPI_PHY_CTRL_CLOCK_LANE_EN);
}
static void c3_mipi_csi_cfg_host(struct c3_csi_device *csi)
{
/* Reset CSI-2 controller output */
c3_mipi_csi_write(csi, CSI2_HOST_CSI2_RESETN,
CSI2_HOST_CSI2_RESETN_ACTIVE);
c3_mipi_csi_write(csi, CSI2_HOST_CSI2_RESETN,
CSI2_HOST_CSI2_RESETN_EXIT);
/* Set data lane number */
c3_mipi_csi_write(csi, CSI2_HOST_N_LANES, csi->bus.num_data_lanes - 1);
}
static int c3_mipi_csi_start_stream(struct c3_csi_device *csi,
struct v4l2_subdev *src_sd)
{
s64 link_freq;
s64 lane_rate;
link_freq = v4l2_get_link_freq(src_sd->ctrl_handler, 0, 0);
if (link_freq < 0) {
dev_err(csi->dev,
"Unable to obtain link frequency: %lld\n", link_freq);
return link_freq;
}
lane_rate = link_freq * 2;
if (lane_rate > 1500000000) {
dev_err(csi->dev, "Invalid lane rate: %lld\n", lane_rate);
return -EINVAL;
}
c3_mipi_csi_cfg_aphy(csi);
c3_mipi_csi_cfg_dphy(csi, lane_rate);
c3_mipi_csi_cfg_host(csi);
return 0;
}
static int c3_mipi_csi_enable_streams(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state,
u32 pad, u64 streams_mask)
{
struct c3_csi_device *csi = v4l2_get_subdevdata(sd);
struct media_pad *sink_pad;
struct v4l2_subdev *src_sd;
int ret;
sink_pad = &csi->pads[C3_MIPI_CSI2_PAD_SINK];
csi->src_pad = media_pad_remote_pad_unique(sink_pad);
if (IS_ERR(csi->src_pad)) {
dev_dbg(csi->dev, "Failed to get source pad for MIPI CSI-2\n");
return -EPIPE;
}
src_sd = media_entity_to_v4l2_subdev(csi->src_pad->entity);
pm_runtime_resume_and_get(csi->dev);
c3_mipi_csi_start_stream(csi, src_sd);
ret = v4l2_subdev_enable_streams(src_sd, csi->src_pad->index, BIT(0));
if (ret) {
pm_runtime_put(csi->dev);
return ret;
}
return 0;
}
static int c3_mipi_csi_disable_streams(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state,
u32 pad, u64 streams_mask)
{
struct c3_csi_device *csi = v4l2_get_subdevdata(sd);
struct v4l2_subdev *src_sd;
if (csi->src_pad) {
src_sd = media_entity_to_v4l2_subdev(csi->src_pad->entity);
v4l2_subdev_disable_streams(src_sd, csi->src_pad->index,
BIT(0));
}
csi->src_pad = NULL;
pm_runtime_put(csi->dev);
return 0;
}
static int c3_mipi_csi_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state,
struct v4l2_subdev_mbus_code_enum *code)
{
struct v4l2_mbus_framefmt *fmt;
switch (code->pad) {
case C3_MIPI_CSI2_PAD_SINK:
if (code->index >= ARRAY_SIZE(c3_mipi_csi_formats))
return -EINVAL;
code->code = c3_mipi_csi_formats[code->index];
break;
case C3_MIPI_CSI2_PAD_SRC:
if (code->index)
return -EINVAL;
fmt = v4l2_subdev_state_get_format(state, code->pad);
code->code = fmt->code;
break;
default:
return -EINVAL;
}
return 0;
}
static int c3_mipi_csi_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state,
struct v4l2_subdev_format *format)
{
struct v4l2_mbus_framefmt *fmt;
unsigned int i;
if (format->pad != C3_MIPI_CSI2_PAD_SINK)
return v4l2_subdev_get_fmt(sd, state, format);
fmt = v4l2_subdev_state_get_format(state, format->pad);
for (i = 0; i < ARRAY_SIZE(c3_mipi_csi_formats); i++) {
if (format->format.code == c3_mipi_csi_formats[i]) {
fmt->code = c3_mipi_csi_formats[i];
break;
}
}
if (i == ARRAY_SIZE(c3_mipi_csi_formats))
fmt->code = c3_mipi_csi_formats[0];
fmt->width = clamp_t(u32, format->format.width,
C3_MIPI_CSI2_MIN_WIDTH, C3_MIPI_CSI2_MAX_WIDTH);
fmt->height = clamp_t(u32, format->format.height,
C3_MIPI_CSI2_MIN_HEIGHT, C3_MIPI_CSI2_MAX_HEIGHT);
fmt->colorspace = V4L2_COLORSPACE_RAW;
fmt->xfer_func = V4L2_XFER_FUNC_NONE;
fmt->ycbcr_enc = V4L2_YCBCR_ENC_601;
fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
format->format = *fmt;
/* Synchronize the format to source pad */
fmt = v4l2_subdev_state_get_format(state, C3_MIPI_CSI2_PAD_SRC);
*fmt = format->format;
return 0;
}
static int c3_mipi_csi_init_state(struct v4l2_subdev *sd,
struct v4l2_subdev_state *state)
{
struct v4l2_mbus_framefmt *sink_fmt;
struct v4l2_mbus_framefmt *src_fmt;
sink_fmt = v4l2_subdev_state_get_format(state, C3_MIPI_CSI2_PAD_SINK);
src_fmt = v4l2_subdev_state_get_format(state, C3_MIPI_CSI2_PAD_SRC);
sink_fmt->width = C3_MIPI_CSI2_DEFAULT_WIDTH;
sink_fmt->height = C3_MIPI_CSI2_DEFAULT_HEIGHT;
sink_fmt->field = V4L2_FIELD_NONE;
sink_fmt->code = C3_MIPI_CSI2_DEFAULT_FMT;
sink_fmt->colorspace = V4L2_COLORSPACE_RAW;
sink_fmt->xfer_func = V4L2_XFER_FUNC_NONE;
sink_fmt->ycbcr_enc = V4L2_YCBCR_ENC_601;
sink_fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
*src_fmt = *sink_fmt;
return 0;
}
static const struct v4l2_subdev_pad_ops c3_mipi_csi_pad_ops = {
.enum_mbus_code = c3_mipi_csi_enum_mbus_code,
.get_fmt = v4l2_subdev_get_fmt,
.set_fmt = c3_mipi_csi_set_fmt,
.enable_streams = c3_mipi_csi_enable_streams,
.disable_streams = c3_mipi_csi_disable_streams,
};
static const struct v4l2_subdev_ops c3_mipi_csi_subdev_ops = {
.pad = &c3_mipi_csi_pad_ops,
};
static const struct v4l2_subdev_internal_ops c3_mipi_csi_internal_ops = {
.init_state = c3_mipi_csi_init_state,
};
/* Media entity operations */
static const struct media_entity_operations c3_mipi_csi_entity_ops = {
.link_validate = v4l2_subdev_link_validate,
};
/* PM runtime */
static int c3_mipi_csi_runtime_suspend(struct device *dev)
{
struct c3_csi_device *csi = dev_get_drvdata(dev);
clk_bulk_disable_unprepare(csi->info->clock_num, csi->clks);
return 0;
}
static int c3_mipi_csi_runtime_resume(struct device *dev)
{
struct c3_csi_device *csi = dev_get_drvdata(dev);
return clk_bulk_prepare_enable(csi->info->clock_num, csi->clks);
}
static const struct dev_pm_ops c3_mipi_csi_pm_ops = {
SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
pm_runtime_force_resume)
RUNTIME_PM_OPS(c3_mipi_csi_runtime_suspend,
c3_mipi_csi_runtime_resume, NULL)
};
/* Probe/remove & platform driver */
static int c3_mipi_csi_subdev_init(struct c3_csi_device *csi)
{
struct v4l2_subdev *sd = &csi->sd;
int ret;
v4l2_subdev_init(sd, &c3_mipi_csi_subdev_ops);
sd->owner = THIS_MODULE;
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
sd->internal_ops = &c3_mipi_csi_internal_ops;
snprintf(sd->name, sizeof(sd->name), "%s", MIPI_CSI2_SUBDEV_NAME);
sd->entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
sd->entity.ops = &c3_mipi_csi_entity_ops;
sd->dev = csi->dev;
v4l2_set_subdevdata(sd, csi);
csi->pads[C3_MIPI_CSI2_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
csi->pads[C3_MIPI_CSI2_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE;
ret = media_entity_pads_init(&sd->entity, C3_MIPI_CSI2_PAD_MAX,
csi->pads);
if (ret)
return ret;
ret = v4l2_subdev_init_finalize(sd);
if (ret) {
media_entity_cleanup(&sd->entity);
return ret;
}
return 0;
}
static void c3_mipi_csi_subdev_deinit(struct c3_csi_device *csi)
{
v4l2_subdev_cleanup(&csi->sd);
media_entity_cleanup(&csi->sd.entity);
}
/* Subdev notifier register */
static int c3_mipi_csi_notify_bound(struct v4l2_async_notifier *notifier,
struct v4l2_subdev *sd,
struct v4l2_async_connection *asc)
{
struct c3_csi_device *csi = v4l2_get_subdevdata(notifier->sd);
struct media_pad *sink = &csi->sd.entity.pads[C3_MIPI_CSI2_PAD_SINK];
return v4l2_create_fwnode_links_to_pad(sd, sink, MEDIA_LNK_FL_ENABLED |
MEDIA_LNK_FL_IMMUTABLE);
}
static const struct v4l2_async_notifier_operations c3_mipi_csi_notify_ops = {
.bound = c3_mipi_csi_notify_bound,
};
static int c3_mipi_csi_async_register(struct c3_csi_device *csi)
{
struct v4l2_fwnode_endpoint vep = {
.bus_type = V4L2_MBUS_CSI2_DPHY,
};
struct v4l2_async_connection *asc;
struct fwnode_handle *ep;
int ret;
v4l2_async_subdev_nf_init(&csi->notifier, &csi->sd);
ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(csi->dev), 0, 0,
FWNODE_GRAPH_ENDPOINT_NEXT);
if (!ep)
return -ENOTCONN;
ret = v4l2_fwnode_endpoint_parse(ep, &vep);
if (ret)
goto err_put_handle;
csi->bus = vep.bus.mipi_csi2;
asc = v4l2_async_nf_add_fwnode_remote(&csi->notifier, ep,
struct v4l2_async_connection);
if (IS_ERR(asc)) {
ret = PTR_ERR(asc);
goto err_put_handle;
}
csi->notifier.ops = &c3_mipi_csi_notify_ops;
ret = v4l2_async_nf_register(&csi->notifier);
if (ret)
goto err_cleanup_nf;
ret = v4l2_async_register_subdev(&csi->sd);
if (ret)
goto err_unregister_nf;
fwnode_handle_put(ep);
return 0;
err_unregister_nf:
v4l2_async_nf_unregister(&csi->notifier);
err_cleanup_nf:
v4l2_async_nf_cleanup(&csi->notifier);
err_put_handle:
fwnode_handle_put(ep);
return ret;
}
static void c3_mipi_csi_async_unregister(struct c3_csi_device *csi)
{
v4l2_async_unregister_subdev(&csi->sd);
v4l2_async_nf_unregister(&csi->notifier);
v4l2_async_nf_cleanup(&csi->notifier);
}
static int c3_mipi_csi_ioremap_resource(struct c3_csi_device *csi)
{
struct device *dev = csi->dev;
struct platform_device *pdev = to_platform_device(dev);
csi->aphy = devm_platform_ioremap_resource_byname(pdev, "aphy");
if (IS_ERR(csi->aphy))
return PTR_ERR(csi->aphy);
csi->dphy = devm_platform_ioremap_resource_byname(pdev, "dphy");
if (IS_ERR(csi->dphy))
return PTR_ERR(csi->dphy);
csi->host = devm_platform_ioremap_resource_byname(pdev, "host");
if (IS_ERR(csi->host))
return PTR_ERR(csi->host);
return 0;
}
static int c3_mipi_csi_get_clocks(struct c3_csi_device *csi)
{
const struct c3_csi_info *info = csi->info;
for (unsigned int i = 0; i < info->clock_num; i++)
csi->clks[i].id = info->clocks[i];
return devm_clk_bulk_get(csi->dev, info->clock_num, csi->clks);
}
static int c3_mipi_csi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct c3_csi_device *csi;
int ret;
csi = devm_kzalloc(dev, sizeof(*csi), GFP_KERNEL);
if (!csi)
return -ENOMEM;
csi->info = of_device_get_match_data(dev);
csi->dev = dev;
ret = c3_mipi_csi_ioremap_resource(csi);
if (ret)
return dev_err_probe(dev, ret, "Failed to ioremap resource\n");
ret = c3_mipi_csi_get_clocks(csi);
if (ret)
return dev_err_probe(dev, ret, "Failed to get clocks\n");
platform_set_drvdata(pdev, csi);
pm_runtime_enable(dev);
ret = c3_mipi_csi_subdev_init(csi);
if (ret)
goto err_disable_runtime_pm;
ret = c3_mipi_csi_async_register(csi);
if (ret)
goto err_deinit_subdev;
return 0;
err_deinit_subdev:
c3_mipi_csi_subdev_deinit(csi);
err_disable_runtime_pm:
pm_runtime_disable(dev);
return ret;
};
static void c3_mipi_csi_remove(struct platform_device *pdev)
{
struct c3_csi_device *csi = platform_get_drvdata(pdev);
c3_mipi_csi_async_unregister(csi);
c3_mipi_csi_subdev_deinit(csi);
pm_runtime_disable(&pdev->dev);
};
static const struct c3_csi_info c3_mipi_csi_info = {
.clocks = {"vapb", "phy0"},
.clock_num = 2
};
static const struct of_device_id c3_mipi_csi_of_match[] = {
{
.compatible = "amlogic,c3-mipi-csi2",
.data = &c3_mipi_csi_info,
},
{ },
};
MODULE_DEVICE_TABLE(of, c3_mipi_csi_of_match);
static struct platform_driver c3_mipi_csi_driver = {
.probe = c3_mipi_csi_probe,
.remove = c3_mipi_csi_remove,
.driver = {
.name = "c3-mipi-csi2",
.of_match_table = c3_mipi_csi_of_match,
.pm = pm_ptr(&c3_mipi_csi_pm_ops),
},
};
module_platform_driver(c3_mipi_csi_driver);
MODULE_AUTHOR("Keke Li <keke.li@amlogic.com>");
MODULE_DESCRIPTION("Amlogic C3 MIPI CSI-2 receiver");
MODULE_LICENSE("GPL");
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