media: bcm2835-unicam: Add support for CCP2/CSI2 camera interface
Add a driver for the Unicam camera receiver block on BCM283x processors. It is represented as two video device nodes: unicam-image and unicam-embedded which are connected to an internal subdev (named unicam-subdev) in order to manage streams routing. Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> Co-developed-by: Naushir Patuck <naush@raspberrypi.com> Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Co-developed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Co-developed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> [Sakari Ailus: Squash fixes by Laurent.] Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
This commit is contained in:
Dave Stevenson
Hans Verkuil
parent
05a9eadb95
commit
392cd78d49
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@ -4039,6 +4039,7 @@ M: Raspberry Pi Kernel Maintenance <kernel-list@raspberrypi.com>
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L: linux-media@vger.kernel.org
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S: Maintained
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F: Documentation/devicetree/bindings/media/brcm,bcm2835-unicam.yaml
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F: drivers/media/platform/bcm2835/
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BROADCOM BCM47XX MIPS ARCHITECTURE
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M: Hauke Mehrtens <hauke@hauke-m.de>
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@ -67,6 +67,7 @@ source "drivers/media/platform/amlogic/Kconfig"
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source "drivers/media/platform/amphion/Kconfig"
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source "drivers/media/platform/aspeed/Kconfig"
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source "drivers/media/platform/atmel/Kconfig"
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source "drivers/media/platform/broadcom/Kconfig"
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source "drivers/media/platform/cadence/Kconfig"
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source "drivers/media/platform/chips-media/Kconfig"
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source "drivers/media/platform/intel/Kconfig"
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@ -10,6 +10,7 @@ obj-y += amlogic/
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obj-y += amphion/
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obj-y += aspeed/
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obj-y += atmel/
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obj-y += broadcom/
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obj-y += cadence/
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obj-y += chips-media/
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obj-y += intel/
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@ -0,0 +1,23 @@
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# SPDX-License-Identifier: GPL-2.0
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config VIDEO_BCM2835_UNICAM
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tristate "Broadcom BCM283x/BCM271x Unicam video capture driver"
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depends on ARCH_BCM2835 || COMPILE_TEST
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depends on PM
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depends on VIDEO_DEV
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select MEDIA_CONTROLLER
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select V4L2_FWNODE
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select VIDEO_V4L2_SUBDEV_API
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select VIDEOBUF2_DMA_CONTIG
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help
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Say Y here to enable support for the BCM283x/BCM271x CSI-2 receiver.
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This is a V4L2 driver that controls the CSI-2 receiver directly,
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independently from the VC4 firmware.
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This driver is mutually exclusive with the use of bcm2835-camera. The
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firmware will disable all access to the peripheral from within the
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firmware if it finds a DT node using it, and bcm2835-camera will
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therefore fail to probe.
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To compile this driver as a module, choose M here. The module will be
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called bcm2835-unicam.
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@ -0,0 +1,3 @@
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# SPDX-License-Identifier: GPL-2.0
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obj-$(CONFIG_VIDEO_BCM2835_UNICAM) += bcm2835-unicam.o
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@ -0,0 +1,246 @@
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2017-2020 Raspberry Pi Trading.
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* Dave Stevenson <dave.stevenson@raspberrypi.com>
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*/
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#ifndef VC4_REGS_UNICAM_H
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#define VC4_REGS_UNICAM_H
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#include <linux/bits.h>
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/*
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* The following values are taken from files found within the code drop
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* made by Broadcom for the BCM21553 Graphics Driver, predominantly in
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* brcm_usrlib/dag/vmcsx/vcinclude/hardware_vc4.h.
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* They have been modified to be only the register offset.
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*/
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#define UNICAM_CTRL 0x000
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#define UNICAM_STA 0x004
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#define UNICAM_ANA 0x008
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#define UNICAM_PRI 0x00c
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#define UNICAM_CLK 0x010
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#define UNICAM_CLT 0x014
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#define UNICAM_DAT0 0x018
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#define UNICAM_DAT1 0x01c
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#define UNICAM_DAT2 0x020
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#define UNICAM_DAT3 0x024
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#define UNICAM_DLT 0x028
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#define UNICAM_CMP0 0x02c
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#define UNICAM_CMP1 0x030
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#define UNICAM_CAP0 0x034
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#define UNICAM_CAP1 0x038
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#define UNICAM_ICTL 0x100
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#define UNICAM_ISTA 0x104
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#define UNICAM_IDI0 0x108
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#define UNICAM_IPIPE 0x10c
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#define UNICAM_IBSA0 0x110
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#define UNICAM_IBEA0 0x114
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#define UNICAM_IBLS 0x118
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#define UNICAM_IBWP 0x11c
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#define UNICAM_IHWIN 0x120
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#define UNICAM_IHSTA 0x124
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#define UNICAM_IVWIN 0x128
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#define UNICAM_IVSTA 0x12c
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#define UNICAM_ICC 0x130
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#define UNICAM_ICS 0x134
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#define UNICAM_IDC 0x138
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#define UNICAM_IDPO 0x13c
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#define UNICAM_IDCA 0x140
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#define UNICAM_IDCD 0x144
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#define UNICAM_IDS 0x148
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#define UNICAM_DCS 0x200
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#define UNICAM_DBSA0 0x204
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#define UNICAM_DBEA0 0x208
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#define UNICAM_DBWP 0x20c
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#define UNICAM_DBCTL 0x300
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#define UNICAM_IBSA1 0x304
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#define UNICAM_IBEA1 0x308
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#define UNICAM_IDI1 0x30c
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#define UNICAM_DBSA1 0x310
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#define UNICAM_DBEA1 0x314
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#define UNICAM_MISC 0x400
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/*
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* The following bitmasks are from the kernel released by Broadcom
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* for Android - https://android.googlesource.com/kernel/bcm/
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* The Rhea, Hawaii, and Java chips all contain the same VideoCore4
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* Unicam block as BCM2835, as defined in eg
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* arch/arm/mach-rhea/include/mach/rdb_A0/brcm_rdb_cam.h and similar.
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* Values reworked to use the kernel BIT and GENMASK macros.
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*
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* Some of the bit mnenomics have been amended to match the datasheet.
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*/
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/* UNICAM_CTRL Register */
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#define UNICAM_CPE BIT(0)
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#define UNICAM_MEM BIT(1)
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#define UNICAM_CPR BIT(2)
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#define UNICAM_CPM_MASK GENMASK(3, 3)
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#define UNICAM_CPM_CSI2 0
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#define UNICAM_CPM_CCP2 1
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#define UNICAM_SOE BIT(4)
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#define UNICAM_DCM_MASK GENMASK(5, 5)
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#define UNICAM_DCM_STROBE 0
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#define UNICAM_DCM_DATA 1
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#define UNICAM_SLS BIT(6)
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#define UNICAM_PFT_MASK GENMASK(11, 8)
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#define UNICAM_OET_MASK GENMASK(20, 12)
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/* UNICAM_STA Register */
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#define UNICAM_SYN BIT(0)
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#define UNICAM_CS BIT(1)
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#define UNICAM_SBE BIT(2)
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#define UNICAM_PBE BIT(3)
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#define UNICAM_HOE BIT(4)
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#define UNICAM_PLE BIT(5)
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#define UNICAM_SSC BIT(6)
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#define UNICAM_CRCE BIT(7)
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#define UNICAM_OES BIT(8)
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#define UNICAM_IFO BIT(9)
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#define UNICAM_OFO BIT(10)
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#define UNICAM_BFO BIT(11)
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#define UNICAM_DL BIT(12)
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#define UNICAM_PS BIT(13)
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#define UNICAM_IS BIT(14)
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#define UNICAM_PI0 BIT(15)
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#define UNICAM_PI1 BIT(16)
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#define UNICAM_FSI_S BIT(17)
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#define UNICAM_FEI_S BIT(18)
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#define UNICAM_LCI_S BIT(19)
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#define UNICAM_BUF0_RDY BIT(20)
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#define UNICAM_BUF0_NO BIT(21)
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#define UNICAM_BUF1_RDY BIT(22)
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#define UNICAM_BUF1_NO BIT(23)
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#define UNICAM_DI BIT(24)
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#define UNICAM_STA_MASK_ALL \
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(UNICAM_SBE | UNICAM_PBE | UNICAM_HOE | UNICAM_PLE | UNICAM_SSC | \
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UNICAM_CRCE | UNICAM_IFO | UNICAM_OFO | UNICAM_DL | UNICAM_PS | \
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UNICAM_PI0 | UNICAM_PI1)
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/* UNICAM_ANA Register */
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#define UNICAM_APD BIT(0)
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#define UNICAM_BPD BIT(1)
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#define UNICAM_AR BIT(2)
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#define UNICAM_DDL BIT(3)
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#define UNICAM_CTATADJ_MASK GENMASK(7, 4)
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#define UNICAM_PTATADJ_MASK GENMASK(11, 8)
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/* UNICAM_PRI Register */
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#define UNICAM_PE BIT(0)
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#define UNICAM_PT_MASK GENMASK(2, 1)
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#define UNICAM_NP_MASK GENMASK(7, 4)
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#define UNICAM_PP_MASK GENMASK(11, 8)
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#define UNICAM_BS_MASK GENMASK(15, 12)
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#define UNICAM_BL_MASK GENMASK(17, 16)
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/* UNICAM_CLK Register */
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#define UNICAM_CLE BIT(0)
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#define UNICAM_CLPD BIT(1)
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#define UNICAM_CLLPE BIT(2)
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#define UNICAM_CLHSE BIT(3)
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#define UNICAM_CLTRE BIT(4)
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#define UNICAM_CLAC_MASK GENMASK(8, 5)
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#define UNICAM_CLSTE BIT(29)
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/* UNICAM_CLT Register */
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#define UNICAM_CLT1_MASK GENMASK(7, 0)
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#define UNICAM_CLT2_MASK GENMASK(15, 8)
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/* UNICAM_DATn Registers */
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#define UNICAM_DLE BIT(0)
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#define UNICAM_DLPD BIT(1)
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#define UNICAM_DLLPE BIT(2)
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#define UNICAM_DLHSE BIT(3)
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#define UNICAM_DLTRE BIT(4)
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#define UNICAM_DLSM BIT(5)
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#define UNICAM_DLFO BIT(28)
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#define UNICAM_DLSTE BIT(29)
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#define UNICAM_DAT_MASK_ALL (UNICAM_DLSTE | UNICAM_DLFO)
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/* UNICAM_DLT Register */
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#define UNICAM_DLT1_MASK GENMASK(7, 0)
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#define UNICAM_DLT2_MASK GENMASK(15, 8)
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#define UNICAM_DLT3_MASK GENMASK(23, 16)
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/* UNICAM_ICTL Register */
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#define UNICAM_FSIE BIT(0)
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#define UNICAM_FEIE BIT(1)
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#define UNICAM_IBOB BIT(2)
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#define UNICAM_FCM BIT(3)
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#define UNICAM_TFC BIT(4)
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#define UNICAM_LIP_MASK GENMASK(6, 5)
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#define UNICAM_LCIE_MASK GENMASK(28, 16)
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/* UNICAM_IDI0/1 Register */
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#define UNICAM_ID0_MASK GENMASK(7, 0)
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#define UNICAM_ID1_MASK GENMASK(15, 8)
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#define UNICAM_ID2_MASK GENMASK(23, 16)
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#define UNICAM_ID3_MASK GENMASK(31, 24)
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/* UNICAM_ISTA Register */
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#define UNICAM_FSI BIT(0)
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#define UNICAM_FEI BIT(1)
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#define UNICAM_LCI BIT(2)
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#define UNICAM_ISTA_MASK_ALL (UNICAM_FSI | UNICAM_FEI | UNICAM_LCI)
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/* UNICAM_IPIPE Register */
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#define UNICAM_PUM_MASK GENMASK(2, 0)
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/* Unpacking modes */
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#define UNICAM_PUM_NONE 0
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#define UNICAM_PUM_UNPACK6 1
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#define UNICAM_PUM_UNPACK7 2
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#define UNICAM_PUM_UNPACK8 3
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#define UNICAM_PUM_UNPACK10 4
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#define UNICAM_PUM_UNPACK12 5
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#define UNICAM_PUM_UNPACK14 6
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#define UNICAM_PUM_UNPACK16 7
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#define UNICAM_DDM_MASK GENMASK(6, 3)
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#define UNICAM_PPM_MASK GENMASK(9, 7)
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/* Packing modes */
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#define UNICAM_PPM_NONE 0
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#define UNICAM_PPM_PACK8 1
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#define UNICAM_PPM_PACK10 2
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#define UNICAM_PPM_PACK12 3
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#define UNICAM_PPM_PACK14 4
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#define UNICAM_PPM_PACK16 5
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#define UNICAM_DEM_MASK GENMASK(11, 10)
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#define UNICAM_DEBL_MASK GENMASK(14, 12)
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#define UNICAM_ICM_MASK GENMASK(16, 15)
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#define UNICAM_IDM_MASK GENMASK(17, 17)
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/* UNICAM_ICC Register */
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#define UNICAM_ICFL_MASK GENMASK(4, 0)
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#define UNICAM_ICFH_MASK GENMASK(9, 5)
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#define UNICAM_ICST_MASK GENMASK(12, 10)
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#define UNICAM_ICLT_MASK GENMASK(15, 13)
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#define UNICAM_ICLL_MASK GENMASK(31, 16)
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/* UNICAM_DCS Register */
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#define UNICAM_DIE BIT(0)
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#define UNICAM_DIM BIT(1)
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#define UNICAM_DBOB BIT(3)
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#define UNICAM_FDE BIT(4)
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#define UNICAM_LDP BIT(5)
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#define UNICAM_EDL_MASK GENMASK(15, 8)
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/* UNICAM_DBCTL Register */
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#define UNICAM_DBEN BIT(0)
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#define UNICAM_BUF0_IE BIT(1)
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#define UNICAM_BUF1_IE BIT(2)
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/* UNICAM_CMP[0,1] register */
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#define UNICAM_PCE BIT(31)
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#define UNICAM_GI BIT(9)
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#define UNICAM_CPH BIT(8)
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#define UNICAM_PCVC_MASK GENMASK(7, 6)
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#define UNICAM_PCDT_MASK GENMASK(5, 0)
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/* UNICAM_MISC register */
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#define UNICAM_FL0 BIT(6)
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#define UNICAM_FL1 BIT(9)
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#endif
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