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Subject[PATCH] [media] at91: add Atmel Image Sensor Interface (ISI) support
Date
This patch is to enable Atmel Image Sensor Interface (ISI) driver support. 
- Using soc-camera framework with videobuf2 dma-contig allocator
- Supporting video streaming of YUV packed format
- Tested on AT91SAM9M10G45-EK with OV2640

Signed-off-by: Josh Wu <josh.wu@atmel.com>
---
base on branch staging/for_v2.6.40
arch/arm/mach-at91/include/mach/at91_isi.h | 454 ++++++++++++
drivers/media/video/Kconfig | 10 +
drivers/media/video/Makefile | 1 +
drivers/media/video/atmel-isi.c | 1089 ++++++++++++++++++++++++++++
4 files changed, 1554 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-at91/include/mach/at91_isi.h
create mode 100644 drivers/media/video/atmel-isi.c
diff --git a/arch/arm/mach-at91/include/mach/at91_isi.h b/arch/arm/mach-at91/include/mach/at91_isi.h
new file mode 100644
index 0000000..3219358
--- /dev/null
+++ b/arch/arm/mach-at91/include/mach/at91_isi.h
@@ -0,0 +1,454 @@
+/*
+ * Register definitions for the Atmel Image Sensor Interface.
+ *
+ * Copyright (C) 2011 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __AT91_ISI_H__
+#define __AT91_ISI_H__
+
+#include <linux/videodev2.h>
+#include <linux/i2c.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-chip-ident.h>
+
+/* ISI register offsets */
+#define ISI_CR1 0x0000
+#define ISI_CR2 0x0004
+#define ISI_SR 0x0008
+#define ISI_IER 0x000c
+#define ISI_IDR 0x0010
+#define ISI_IMR 0x0014
+#define ISI_PSIZE 0x0020
+#define ISI_PDECF 0x0024
+#define ISI_PPFBD 0x0028
+#define ISI_CDBA 0x002c
+#define ISI_Y2R_SET0 0x0030
+#define ISI_Y2R_SET1 0x0034
+#define ISI_R2Y_SET0 0x0038
+#define ISI_R2Y_SET1 0x003c
+#define ISI_R2Y_SET2 0x0040
+
+/* ISI_V2 register offsets */
+#define ISI_V2_CFG1 0x0000
+#define ISI_V2_CFG2 0x0004
+#define ISI_V2_PSIZE 0x0008
+#define ISI_V2_PDECF 0x000c
+#define ISI_V2_Y2R_SET0 0x0010
+#define ISI_V2_Y2R_SET1 0x0014
+#define ISI_V2_R2Y_SET0 0x0018
+#define ISI_V2_R2Y_SET1 0x001C
+#define ISI_V2_R2Y_SET2 0x0020
+#define ISI_V2_CTRL 0x0024
+#define ISI_V2_STATUS 0x0028
+#define ISI_V2_INTEN 0x002C
+#define ISI_V2_INTDIS 0x0030
+#define ISI_V2_INTMASK 0x0034
+#define ISI_V2_DMA_CHER 0x0038
+#define ISI_V2_DMA_CHDR 0x003C
+#define ISI_V2_DMA_CHSR 0x0040
+#define ISI_V2_DMA_P_ADDR 0x0044
+#define ISI_V2_DMA_P_CTRL 0x0048
+#define ISI_V2_DMA_P_DSCR 0x004C
+#define ISI_V2_DMA_C_ADDR 0x0050
+#define ISI_V2_DMA_C_CTRL 0x0054
+#define ISI_V2_DMA_C_DSCR 0x0058
+
+/* Bitfields in CR1 */
+#define ISI_RST_OFFSET 0
+#define ISI_RST_SIZE 1
+#define ISI_DIS_OFFSET 1
+#define ISI_DIS_SIZE 1
+#define ISI_HSYNC_POL_OFFSET 2
+#define ISI_HSYNC_POL_SIZE 1
+#define ISI_VSYNC_POL_OFFSET 3
+#define ISI_VSYNC_POL_SIZE 1
+#define ISI_PIXCLK_POL_OFFSET 4
+#define ISI_PIXCLK_POL_SIZE 1
+#define ISI_EMB_SYNC_OFFSET 6
+#define ISI_EMB_SYNC_SIZE 1
+#define ISI_CRC_SYNC_OFFSET 7
+#define ISI_CRC_SYNC_SIZE 1
+#define ISI_FRATE_OFFSET 8
+#define ISI_FRATE_SIZE 3
+#define ISI_FULL_OFFSET 12
+#define ISI_FULL_SIZE 1
+#define ISI_THMASK_OFFSET 13
+#define ISI_THMASK_SIZE 2
+#define ISI_CODEC_ON_OFFSET 15
+#define ISI_CODEC_ON_SIZE 1
+#define ISI_SLD_OFFSET 16
+#define ISI_SLD_SIZE 8
+#define ISI_SFD_OFFSET 24
+#define ISI_SFD_SIZE 8
+
+/* Bitfields in CFG1 */
+#define ISI_V2_HSYNC_POL_OFFSET 2
+#define ISI_V2_HSYNC_POL_SIZE 1
+#define ISI_V2_VSYNC_POL_OFFSET 3
+#define ISI_V2_VSYNC_POL_SIZE 1
+#define ISI_V2_PIXCLK_POL_OFFSET 4
+#define ISI_V2_PIXCLK_POL_SIZE 1
+#define ISI_V2_EMB_SYNC_OFFSET 6
+#define ISI_V2_EMB_SYNC_SIZE 1
+#define ISI_V2_CRC_SYNC_OFFSET 7
+#define ISI_V2_CRC_SYNC_SIZE 1
+#define ISI_V2_FRATE_OFFSET 8
+#define ISI_V2_FRATE_SIZE 3
+#define ISI_V2_DISCR_OFFSET 11
+#define ISI_V2_DISCR_SIZE 1
+#define ISI_V2_FULL_OFFSET 12
+#define ISI_V2_FULL_SIZE 1
+#define ISI_V2_THMASK_OFFSET 13
+#define ISI_V2_THMASK_SIZE 2
+#define ISI_V2_SLD_OFFSET 16
+#define ISI_V2_SLD_SIZE 8
+#define ISI_V2_SFD_OFFSET 24
+#define ISI_V2_SFD_SIZE 8
+
+/* Bitfields in CR2 */
+#define ISI_IM_VSIZE_OFFSET 0
+#define ISI_IM_VSIZE_SIZE 11
+#define ISI_GS_MODE_OFFSET 11
+#define ISI_GS_MODE_SIZE 1
+#define ISI_RGB_MODE_OFFSET 12
+#define ISI_RGB_MODE_SIZE 1
+#define ISI_GRAYSCALE_OFFSET 13
+#define ISI_GRAYSCALE_SIZE 1
+#define ISI_RGB_SWAP_OFFSET 14
+#define ISI_RGB_SWAP_SIZE 1
+#define ISI_COL_SPACE_OFFSET 15
+#define ISI_COL_SPACE_SIZE 1
+#define ISI_IM_HSIZE_OFFSET 16
+#define ISI_IM_HSIZE_SIZE 11
+#define ISI_YCC_SWAP_OFFSET 28
+#define ISI_YCC_SWAP_SIZE 2
+#define ISI_RGB_CFG_OFFSET 30
+#define ISI_RGB_CFG_SIZE 2
+
+/* Bitfields in CFG2 */
+#define ISI_V2_IM_VSIZE_OFFSET 0
+#define ISI_V2_IM_VSIZE_SIZE 11
+#define ISI_V2_GS_MODE_OFFSET 11
+#define ISI_V2_GS_MODE_SIZE 1
+#define ISI_V2_RGB_MODE_OFFSET 12
+#define ISI_V2_RGB_MODE_SIZE 1
+#define ISI_V2_GRAYSCALE_OFFSET 13
+#define ISI_V2_GRAYSCALE_SIZE 1
+#define ISI_V2_RGB_SWAP_OFFSET 14
+#define ISI_V2_RGB_SWAP_SIZE 1
+#define ISI_V2_COL_SPACE_OFFSET 15
+#define ISI_V2_COL_SPACE_SIZE 1
+#define ISI_V2_IM_HSIZE_OFFSET 16
+#define ISI_V2_IM_HSIZE_SIZE 11
+#define ISI_V2_YCC_SWAP_OFFSET 28
+#define ISI_V2_YCC_SWAP_SIZE 2
+#define ISI_V2_RGB_CFG_OFFSET 30
+#define ISI_V2_RGB_CFG_SIZE 2
+
+/* Bitfields in CTRL */
+#define ISI_V2_EN_OFFSET 0
+#define ISI_V2_EN_SIZE 1
+#define ISI_V2_DIS_OFFSET 1
+#define ISI_V2_DIS_SIZE 1
+#define ISI_V2_SRST_OFFSET 2
+#define ISI_V2_SRST_SIZE 1
+#define ISI_V2_CDC_OFFSET 8
+#define ISI_V2_CDC_SIZE 1
+
+/* Bitfields in SR/IER/IDR/IMR */
+#define ISI_SOF_OFFSET 0
+#define ISI_SOF_SIZE 1
+#define ISI_SOFTRST_OFFSET 2
+#define ISI_SOFTRST_SIZE 1
+#define ISI_CDC_STATUS_OFFSET 3
+#define ISI_CDC_STATUS_SIZE 1
+#define ISI_CRC_ERR_OFFSET 4
+#define ISI_CRC_ERR_SIZE 1
+#define ISI_FO_C_OVF_OFFSET 5
+#define ISI_FO_C_OVF_SIZE 1
+#define ISI_FO_P_OVF_OFFSET 6
+#define ISI_FO_P_OVF_SIZE 1
+#define ISI_FO_P_EMP_OFFSET 7
+#define ISI_FO_P_EMP_SIZE 1
+#define ISI_FO_C_EMP_OFFSET 8
+#define ISI_FO_C_EMP_SIZE 1
+#define ISI_FR_OVR_OFFSET 9
+#define ISI_FR_OVR_SIZE 1
+
+/* Bitfields in SR/IER/IDR/IMR(ISI_V2) */
+#define ISI_V2_ENABLE_OFFSET 0
+#define ISI_V2_ENABLE_SIZE 1
+#define ISI_V2_DIS_DONE_OFFSET 1
+#define ISI_V2_DIS_DONE_SIZE 1
+#define ISI_V2_SRST_OFFSET 2
+#define ISI_V2_SRST_SIZE 1
+#define ISI_V2_CDC_STATUS_OFFSET 8
+#define ISI_V2_CDC_STATUS_SIZE 1
+#define ISI_V2_VSYNC_OFFSET 10
+#define ISI_V2_VSYNC_SIZE 1
+#define ISI_V2_PXFR_DONE_OFFSET 16
+#define ISI_V2_PXFR_DONE_SIZE 1
+#define ISI_V2_CXFR_DONE_OFFSET 17
+#define ISI_V2_CXFR_DONE_SIZE 1
+#define ISI_V2_P_OVR_OFFSET 24
+#define ISI_V2_P_OVR_SIZE 1
+#define ISI_V2_C_OVR_OFFSET 25
+#define ISI_V2_C_OVR_SIZE 1
+#define ISI_V2_CRC_ERR_OFFSET 26
+#define ISI_V2_CRC_ERR_SIZE 1
+#define ISI_V2_FR_OVR_OFFSET 27
+#define ISI_V2_FR_OVR_SIZE 1
+
+/* Bitfields in PSIZE */
+#define ISI_PREV_VSIZE_OFFSET 0
+#define ISI_PREV_VSIZE_SIZE 10
+#define ISI_PREV_HSIZE_OFFSET 16
+#define ISI_PREV_HSIZE_SIZE 10
+
+/* Bitfields in PSIZE(ISI_V2) */
+#define ISI_V2_PREV_VSIZE_OFFSET 0
+#define ISI_V2_PREV_VSIZE_SIZE 10
+#define ISI_V2_PREV_HSIZE_OFFSET 16
+#define ISI_V2_PREV_HSIZE_SIZE 10
+
+/* Bitfields in PCDEF */
+#define ISI_DEC_FACTOR_OFFSET 0
+#define ISI_DEC_FACTOR_SIZE 8
+
+/* Bitfields in PCDEF */
+#define ISI_V2_DEC_FACTOR_OFFSET 0
+#define ISI_V2_DEC_FACTOR_SIZE 8
+
+/* Bitfields in PPFBD */
+#define ISI_PREV_FBD_ADDR_OFFSET 0
+#define ISI_PREV_FBD_ADDR_SIZE 32
+
+/* Bitfields in CDBA */
+#define ISI_CODEC_DMA_ADDR_OFFSET 0
+#define ISI_CODEC_DMA_ADDR_SIZE 32
+
+/* Bitfields in DMA_C_ADDR */
+#define ISI_V2_DMA_ADDR_OFFSET 0
+#define ISI_V2_DMA_ADDR_SIZE 32
+
+/* Bitfields in DMA_C_CTRL & in DMA_P_CTRL */
+#define ISI_V2_DMA_FETCH_OFFSET 0
+#define ISI_V2_DMA_FETCH_SIZE 1
+#define ISI_V2_DMA_WB_OFFSET 1
+#define ISI_V2_DMA_WB_SIZE 1
+#define ISI_V2_DMA_IEN_OFFSET 2
+#define ISI_V2_DMA_IEN_SIZE 1
+#define ISI_V2_DMA_DONE_OFFSET 3
+#define ISI_V2_DMA_DONE_SIZE 1
+
+/* Bitfields in DMA_CHER */
+#define ISI_V2_DMA_P_CH_EN_OFFSET 0
+#define ISI_V2_DMA_P_CH_EN_SIZE 1
+#define ISI_V2_DMA_C_CH_EN_OFFSET 1
+#define ISI_V2_DMA_C_CH_EN_SIZE 1
+
+/* Bitfields in Y2R_SET0 */
+#define ISI_Y2R_SET0_C3_OFFSET 24
+#define ISI_Y2R_SET0_C3_SIZE 8
+
+/* Bitfields in Y2R_SET0(ISI_V2) */
+#define ISI_V2_Y2R_SET0_C3_OFFSET 24
+#define ISI_V2_Y2R_SET0_C3_SIZE 8
+
+/* Bitfields in Y2R_SET1 */
+#define ISI_Y2R_SET1_C4_OFFSET 0
+#define ISI_Y2R_SET1_C4_SIZE 9
+#define ISI_YOFF_OFFSET 12
+#define ISI_YOFF_SIZE 1
+#define ISI_CROFF_OFFSET 13
+#define ISI_CROFF_SIZE 1
+#define ISI_CBOFF_OFFSET 14
+#define ISI_CBOFF_SIZE 1
+
+/* Bitfields in Y2R_SET1(ISI_V2) */
+#define ISI_V2_Y2R_SET1_C4_OFFSET 0
+#define ISI_V2_Y2R_SET1_C4_SIZE 9
+#define ISI_V2_YOFF_OFFSET 12
+#define ISI_V2_YOFF_SIZE 1
+#define ISI_V2_CROFF_OFFSET 13
+#define ISI_V2_CROFF_SIZE 1
+#define ISI_V2_CBOFF_OFFSET 14
+#define ISI_V2_CBOFF_SIZE 1
+
+/* Bitfields in R2Y_SET0 */
+#define ISI_C0_OFFSET 0
+#define ISI_C0_SIZE 8
+#define ISI_C1_OFFSET 8
+#define ISI_C1_SIZE 8
+#define ISI_C2_OFFSET 16
+#define ISI_C2_SIZE 8
+#define ISI_ROFF_OFFSET 24
+#define ISI_ROFF_SIZE 1
+
+/* Bitfields in R2Y_SET0(ISI_V2) */
+#define ISI_V2_C0_OFFSET 0
+#define ISI_V2_C0_SIZE 8
+#define ISI_V2_C1_OFFSET 8
+#define ISI_V2_C1_SIZE 8
+#define ISI_V2_C2_OFFSET 16
+#define ISI_V2_C2_SIZE 8
+#define ISI_V2_ROFF_OFFSET 24
+#define ISI_V2_ROFF_SIZE 1
+
+/* Bitfields in R2Y_SET1 */
+#define ISI_R2Y_SET1_C3_OFFSET 0
+#define ISI_R2Y_SET1_C3_SIZE 8
+#define ISI_R2Y_SET1_C4_OFFSET 8
+#define ISI_R2Y_SET1_C4_SIZE 8
+#define ISI_C5_OFFSET 16
+#define ISI_C5_SIZE 8
+#define ISI_GOFF_OFFSET 24
+#define ISI_GOFF_SIZE 1
+
+/* Bitfields in R2Y_SET1(ISI_V2) */
+#define ISI_V2_R2Y_SET1_C3_OFFSET 0
+#define ISI_V2_R2Y_SET1_C3_SIZE 8
+#define ISI_V2_R2Y_SET1_C4_OFFSET 8
+#define ISI_V2_R2Y_SET1_C4_SIZE 8
+#define ISI_V2_C5_OFFSET 16
+#define ISI_V2_C5_SIZE 8
+#define ISI_V2_GOFF_OFFSET 24
+#define ISI_V2_GOFF_SIZE 1
+
+/* Bitfields in R2Y_SET2 */
+#define ISI_C6_OFFSET 0
+#define ISI_C6_SIZE 8
+#define ISI_C7_OFFSET 8
+#define ISI_C7_SIZE 8
+#define ISI_C8_OFFSET 16
+#define ISI_C8_SIZE 8
+#define ISI_BOFF_OFFSET 24
+#define ISI_BOFF_SIZE 1
+
+/* Bitfields in R2Y_SET2(ISI_V2) */
+#define ISI_V2_C6_OFFSET 0
+#define ISI_V2_C6_SIZE 8
+#define ISI_V2_C7_OFFSET 8
+#define ISI_V2_C7_SIZE 8
+#define ISI_V2_C8_OFFSET 16
+#define ISI_V2_C8_SIZE 8
+#define ISI_V2_BOFF_OFFSET 24
+#define ISI_V2_BOFF_SIZE 1
+
+/* Constants for FRATE */
+#define ISI_FRATE_CAPTURE_ALL 0
+
+/* Constants for FRATE(ISI_V2) */
+#define ISI_V2_FRATE_CAPTURE_ALL 0
+
+/* Constants for YCC_SWAP */
+#define ISI_YCC_SWAP_DEFAULT 0
+#define ISI_YCC_SWAP_MODE_1 1
+#define ISI_YCC_SWAP_MODE_2 2
+#define ISI_YCC_SWAP_MODE_3 3
+
+/* Constants for YCC_SWAP(ISI_V2) */
+#define ISI_V2_YCC_SWAP_DEFAULT 0
+#define ISI_V2_YCC_SWAP_MODE_1 1
+#define ISI_V2_YCC_SWAP_MODE_2 2
+#define ISI_V2_YCC_SWAP_MODE_3 3
+
+/* Constants for RGB_CFG */
+#define ISI_RGB_CFG_DEFAULT 0
+#define ISI_RGB_CFG_MODE_1 1
+#define ISI_RGB_CFG_MODE_2 2
+#define ISI_RGB_CFG_MODE_3 3
+
+/* Constants for RGB_CFG(ISI_V2) */
+#define ISI_V2_RGB_CFG_DEFAULT 0
+#define ISI_V2_RGB_CFG_MODE_1 1
+#define ISI_V2_RGB_CFG_MODE_2 2
+#define ISI_V2_RGB_CFG_MODE_3 3
+
+/* Bit manipulation macros */
+#define ISI_BIT(name) \
+ (1 << ISI_##name##_OFFSET)
+#define ISI_BF(name, value) \
+ (((value) & ((1 << ISI_##name##_SIZE) - 1)) \
+ << ISI_##name##_OFFSET)
+#define ISI_BFEXT(name, value) \
+ (((value) >> ISI_##name##_OFFSET) \
+ & ((1 << ISI_##name##_SIZE) - 1))
+#define ISI_BFINS(name, value, old) \
+ (((old) & ~(((1 << ISI_##name##_SIZE) - 1) \
+ << ISI_##name##_OFFSET))\
+ | ISI_BF(name, value))
+
+/* Register access macros */
+#define isi_readl(port, reg) \
+ __raw_readl((port)->regs + ISI_##reg)
+#define isi_writel(port, reg, value) \
+ __raw_writel((value), (port)->regs + ISI_##reg)
+
+#define ATMEL_V4L2_VID_FLAGS (V4L2_CAP_VIDEO_OUTPUT)
+
+struct atmel_isi;
+
+enum atmel_isi_pixfmt {
+ ATMEL_ISI_PIXFMT_GREY, /* Greyscale */
+ ATMEL_ISI_PIXFMT_CbYCrY,
+ ATMEL_ISI_PIXFMT_CrYCbY,
+ ATMEL_ISI_PIXFMT_YCbYCr,
+ ATMEL_ISI_PIXFMT_YCrYCb,
+ ATMEL_ISI_PIXFMT_RGB24,
+ ATMEL_ISI_PIXFMT_BGR24,
+ ATMEL_ISI_PIXFMT_RGB16,
+ ATMEL_ISI_PIXFMT_BGR16,
+ ATMEL_ISI_PIXFMT_GRB16, /* G[2:0] R[4:0]/B[4:0] G[5:3] */
+ ATMEL_ISI_PIXFMT_GBR16, /* G[2:0] B[4:0]/R[4:0] G[5:3] */
+ ATMEL_ISI_PIXFMT_RGB24_REV,
+ ATMEL_ISI_PIXFMT_BGR24_REV,
+ ATMEL_ISI_PIXFMT_RGB16_REV,
+ ATMEL_ISI_PIXFMT_BGR16_REV,
+ ATMEL_ISI_PIXFMT_GRB16_REV, /* G[2:0] R[4:0]/B[4:0] G[5:3] */
+ ATMEL_ISI_PIXFMT_GBR16_REV, /* G[2:0] B[4:0]/R[4:0] G[5:3] */
+};
+
+struct isi_platform_data {
+ u8 has_emb_sync;
+ u8 emb_crc_sync;
+ u8 hsync_act_low;
+ u8 vsync_act_low;
+ u8 pclk_act_falling;
+ u8 isi_full_mode;
+#define ISI_HSYNC_ACT_LOW 0x01
+#define ISI_VSYNC_ACT_LOW 0x02
+#define ISI_PXCLK_ACT_FALLING 0x04
+#define ISI_EMB_SYNC 0x08
+#define ISI_CRC_SYNC 0x10
+#define ISI_FULL 0x20
+#define ISI_DATAWIDTH_8 0x40
+#define ISI_DATAWIDTH_10 0x80
+ u32 flags;
+ u8 gs_mode;
+#define ISI_GS_2PIX_PER_WORD 0x00
+#define ISI_GS_1PIX_PER_WORD 0x01
+ u8 pixfmt;
+ u8 sfd;
+ u8 sld;
+ u8 thmask;
+#define ISI_BURST_4_8_16 0x00
+#define ISI_BURST_8_16 0x01
+#define ISI_BURST_16 0x02
+ u8 frate;
+#define ISI_FRATE_DIV_2 0x01
+#define ISI_FRATE_DIV_3 0x02
+#define ISI_FRATE_DIV_4 0x03
+#define ISI_FRATE_DIV_5 0x04
+#define ISI_FRATE_DIV_6 0x05
+#define ISI_FRATE_DIV_7 0x06
+#define ISI_FRATE_DIV_8 0x07
+};
+
+#endif /* __AT91_ISI_H__ */
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index d61414e..eae6005 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -80,6 +80,16 @@ menuconfig VIDEO_CAPTURE_DRIVERS
Some of those devices also supports FM radio.

if VIDEO_CAPTURE_DRIVERS && VIDEO_V4L2
+config VIDEO_ATMEL_ISI
+ tristate "ATMEL Image Sensor Interface (ISI) support"
+ depends on VIDEO_DEV && SOC_CAMERA
+ select VIDEOBUF2_DMA_CONTIG
+ default n
+ ---help---
+ This module makes the ATMEL Image Sensor Interface available
+ as a v4l2 device.
+ Say Y here to enable selecting the Image Sensor Interface.
+ When in doubt, say N.

config VIDEO_ADV_DEBUG
bool "Enable advanced debug functionality"
diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
index a10e4c3..f734a65 100644
--- a/drivers/media/video/Makefile
+++ b/drivers/media/video/Makefile
@@ -166,6 +166,7 @@ obj-$(CONFIG_VIDEO_SH_MOBILE_CSI2) += sh_mobile_csi2.o
obj-$(CONFIG_VIDEO_SH_MOBILE_CEU) += sh_mobile_ceu_camera.o
obj-$(CONFIG_VIDEO_OMAP1) += omap1_camera.o
obj-$(CONFIG_VIDEO_SAMSUNG_S5P_FIMC) += s5p-fimc/
+obj-$(CONFIG_VIDEO_ATMEL_ISI) += atmel-isi.o

obj-$(CONFIG_ARCH_DAVINCI) += davinci/

diff --git a/drivers/media/video/atmel-isi.c b/drivers/media/video/atmel-isi.c
new file mode 100644
index 0000000..33d0b83
--- /dev/null
+++ b/drivers/media/video/atmel-isi.c
@@ -0,0 +1,1089 @@
+/*
+ * Copyright (c) 2011 Atmel Corporation
+ *
+ * Based on previous work by Lars Haring and Sedji Gaouaou
+ *
+ * Based on the bttv driver for Bt848 with respective copyright holders
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/completion.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/version.h>
+#include <linux/kfifo.h>
+
+#include <mach/board.h>
+#include <mach/cpu.h>
+#include <mach/at91_isi.h>
+
+#include <media/videobuf2-dma-contig.h>
+#include <media/soc_camera.h>
+#include <media/soc_mediabus.h>
+
+#define ATMEL_ISI_VERSION KERNEL_VERSION(1, 0, 0)
+#define MAX_BUFFER_NUMS 32
+#define MAX_SUPPORT_WIDTH 2048
+#define MAX_SUPPORT_HEIGHT 2048
+
+static unsigned int vid_limit = 16;
+
+enum isi_buffer_state {
+ ISI_BUF_NEEDS_INIT,
+ ISI_BUF_PREPARED,
+};
+
+/* Single frame capturing states */
+enum {
+ STATE_IDLE = 0,
+ STATE_CAPTURE_READY,
+ STATE_CAPTURE_WAIT_SOF,
+ STATE_CAPTURE_IN_PROGRESS,
+ STATE_CAPTURE_DONE,
+ STATE_CAPTURE_ERROR,
+};
+
+/* Frame buffer descriptor
+ * Used by the ISI module as a linked list for the DMA controller.
+ */
+struct fbd {
+ /* Physical address of the frame buffer */
+ u32 fb_address;
+#if defined(CONFIG_ARCH_AT91SAM9G45) ||\
+ defined(CONFIG_ARCH_AT91SAM9X5)
+ /* DMA Control Register(only in HISI2) */
+ u32 dma_ctrl;
+#endif
+ /* Physical address of the next fbd */
+ u32 next_fbd_address;
+};
+
+#if defined(CONFIG_ARCH_AT91SAM9G45) ||\
+ defined(CONFIG_ARCH_AT91SAM9X5)
+static void set_dma_ctrl(struct fbd *fb_desc, u32 ctrl)
+{
+ fb_desc->dma_ctrl = ctrl;
+}
+#else
+static void set_dma_ctrl(struct fbd *fb_desc, u32 ctrl) { }
+#endif
+
+/* Frame buffer data
+ */
+struct frame_buffer {
+ struct vb2_buffer vb;
+ struct fbd fb_desc;
+ /* Frame number of the frame */
+ unsigned long sequence;
+
+ enum isi_buffer_state dma_desc_status;
+ struct list_head list;
+};
+
+struct atmel_isi {
+ /* ISI module spin lock. Protects against concurrent access of variables
+ * that are shared with the ISR */
+ spinlock_t lock;
+ void __iomem *regs;
+
+ /* If set ISI is in still capture mode */
+ int still_capture;
+ int sequence;
+ /* State of the ISI module in capturing mode */
+ int state;
+
+ /* Capture/streaming wait queue for waiting for SOF */
+ wait_queue_head_t capture_wq;
+
+ struct v4l2_device v4l2_dev;
+
+ struct vb2_alloc_ctx *alloc_ctx;
+
+ struct clk *pclk;
+ struct platform_device *pdev;
+ unsigned int irq;
+
+ struct isi_platform_data *pdata;
+ unsigned long platform_flags;
+
+ struct list_head video_buffer_list;
+ struct frame_buffer *active;
+
+ struct soc_camera_device *icd;
+ struct soc_camera_host soc_host;
+};
+
+static int configure_geometry(struct atmel_isi *isi, u32 width,
+ u32 height, enum v4l2_mbus_pixelcode code)
+{
+ u32 cfg2, cr, ctrl;
+
+ cr = 0;
+ switch (code) {
+ /* YUV, including grey */
+ case V4L2_MBUS_FMT_Y8_1X8:
+ cr = ISI_BIT(GRAYSCALE);
+ break;
+ case V4L2_MBUS_FMT_UYVY8_2X8:
+ cr = ISI_BF(V2_YCC_SWAP, 3);
+ break;
+ case V4L2_MBUS_FMT_VYUY8_2X8:
+ cr = ISI_BF(V2_YCC_SWAP, 2);
+ break;
+ case V4L2_MBUS_FMT_YUYV8_2X8:
+ cr = ISI_BF(V2_YCC_SWAP, 1);
+ break;
+ case V4L2_MBUS_FMT_YVYU8_2X8:
+ cr = ISI_BF(V2_YCC_SWAP, 0);
+ break;
+ /* RGB, TODO */
+ default:
+ return -EINVAL;
+ }
+
+ ctrl = ISI_BIT(DIS);
+ isi_writel(isi, V2_CTRL, ctrl);
+ /* Check if module properly disable */
+ while (isi_readl(isi, V2_STATUS) & ISI_BIT(V2_DIS_DONE))
+ cpu_relax();
+
+ cfg2 = isi_readl(isi, V2_CFG2);
+ cfg2 |= cr;
+ cfg2 = ISI_BFINS(V2_IM_VSIZE, height - 1, cfg2);
+ cfg2 = ISI_BFINS(V2_IM_HSIZE, width - 1, cfg2);
+ isi_writel(isi, V2_CFG2, cfg2);
+
+ return 0;
+}
+
+static irqreturn_t atmel_isi_handle_streaming(struct atmel_isi *isi)
+{
+ if (isi->active) {
+ struct vb2_buffer *vb = &isi->active->vb;
+ struct frame_buffer *buf = isi->active;
+
+ list_del_init(&buf->list);
+ do_gettimeofday(&vb->v4l2_buf.timestamp);
+ vb->v4l2_buf.sequence = isi->sequence++;
+ vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
+ }
+
+ if (list_empty(&isi->video_buffer_list)) {
+ isi->active = NULL;
+ } else {
+ /* start next dma frame. */
+ isi->active = list_entry(isi->video_buffer_list.next,
+ struct frame_buffer, list);
+ isi_writel(isi, V2_DMA_C_DSCR, (__pa(&(isi->active->fb_desc))));
+ isi_writel(isi, V2_DMA_C_CTRL,
+ ISI_BIT(V2_DMA_FETCH) | ISI_BIT(V2_DMA_DONE));
+ isi_writel(isi, V2_DMA_CHER, ISI_BIT(V2_DMA_C_CH_EN));
+ }
+ return IRQ_HANDLED;
+}
+
+/* ISI interrupt service routine */
+static irqreturn_t isi_interrupt(int irq, void *dev_id)
+{
+ struct atmel_isi *isi = dev_id;
+ u32 status, mask, pending;
+ irqreturn_t ret = IRQ_NONE;
+
+ spin_lock(&isi->lock);
+
+ status = isi_readl(isi, V2_STATUS);
+ mask = isi_readl(isi, V2_INTMASK);
+ pending = status & mask;
+
+ if (!isi->still_capture) {
+ if (pending & (ISI_BIT(V2_VSYNC))) {
+ switch (isi->state) {
+ case STATE_IDLE:
+ isi->state = STATE_CAPTURE_READY;
+ wake_up_interruptible(&isi->capture_wq);
+ break;
+ }
+ } else if (likely(pending & (ISI_BIT(V2_CXFR_DONE)))) {
+ ret = atmel_isi_handle_streaming(isi);
+ }
+ } else {
+ while (pending) {
+ if (pending & (ISI_BIT(V2_C_OVR) | ISI_BIT(V2_FR_OVR)))
+ printk(KERN_ERR "Overrun (status = 0x%x)\n",
+ status);
+ else if (pending &
+ (ISI_BIT(V2_VSYNC) | ISI_BIT(V2_CDC))) {
+ switch (isi->state) {
+ case STATE_IDLE:
+ isi->state = STATE_CAPTURE_READY;
+ wake_up_interruptible(&isi->capture_wq);
+ break;
+ case STATE_CAPTURE_READY:
+ break;
+ case STATE_CAPTURE_WAIT_SOF:
+ isi->state = STATE_CAPTURE_IN_PROGRESS;
+ break;
+ }
+ }
+
+ if (likely(pending & (ISI_BIT(V2_CXFR_DONE))))
+ ret = atmel_isi_handle_streaming(isi);
+
+ status = isi_readl(isi, V2_STATUS);
+ mask = isi_readl(isi, V2_INTMASK);
+ pending = status & mask;
+ ret = IRQ_HANDLED;
+ }
+ }
+ spin_unlock(&isi->lock);
+
+ return ret;
+}
+
+static int atmel_isi_init(struct atmel_isi *isi)
+{
+ /*
+ * The reset will only succeed if we have a
+ * pixel clock from the camera.
+ */
+ isi_writel(isi, V2_CTRL, ISI_BIT(V2_SRST));
+ isi_writel(isi, V2_INTDIS, ~0UL);
+
+ return 0;
+}
+
+/* ------------------------------------------------------------------
+ Videobuf operations
+ ------------------------------------------------------------------*/
+static int queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
+ unsigned int *nplanes, unsigned long sizes[],
+ void *alloc_ctxs[])
+{
+ struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+ struct atmel_isi *dev = ici->priv;
+ unsigned long size;
+
+ int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
+ icd->current_fmt->host_fmt);
+
+ if (bytes_per_line < 0)
+ return bytes_per_line;
+
+ size = bytes_per_line * icd->user_height;
+
+ if (0 == *nbuffers)
+ *nbuffers = MAX_BUFFER_NUMS;
+ if (*nbuffers > MAX_BUFFER_NUMS)
+ *nbuffers = MAX_BUFFER_NUMS;
+
+ while (size * *nbuffers > vid_limit * 1024 * 1024)
+ (*nbuffers)--;
+
+ *nplanes = 1;
+ sizes[0] = size;
+ alloc_ctxs[0] = dev->alloc_ctx;
+
+ dev->sequence = 0;
+ dev->active = NULL;
+
+ dev_dbg(icd->dev.parent, "%s, count=%d, size=%ld\n", __func__,
+ *nbuffers, size);
+
+ return 0;
+}
+
+static int buffer_init(struct vb2_buffer *vb)
+{
+ struct frame_buffer *buf = container_of(vb, struct frame_buffer, vb);
+
+ buf->dma_desc_status = ISI_BUF_NEEDS_INIT;
+ INIT_LIST_HEAD(&buf->list);
+
+ return 0;
+}
+
+static int buffer_prepare(struct vb2_buffer *vb)
+{
+ struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
+ struct frame_buffer *buf = container_of(vb, struct frame_buffer, vb);
+ unsigned long size;
+ int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
+ icd->current_fmt->host_fmt);
+
+ if (bytes_per_line < 0)
+ return bytes_per_line;
+
+ size = bytes_per_line * icd->user_height;
+
+ if (vb2_plane_size(vb, 0) < size) {
+ dev_err(icd->dev.parent, "%s data will not fit into plane (%lu < %lu)\n",
+ __func__, vb2_plane_size(vb, 0), size);
+ return -EINVAL;
+ }
+
+ vb2_set_plane_payload(&buf->vb, 0, size);
+
+ if (buf->dma_desc_status == ISI_BUF_NEEDS_INIT) {
+ buf->dma_desc_status = ISI_BUF_PREPARED;
+
+ /* initialize the dma descriptor */
+ buf->fb_desc.fb_address = vb2_dma_contig_plane_paddr(vb, 0);
+ buf->fb_desc.next_fbd_address = 0;
+ set_dma_ctrl(&buf->fb_desc, ISI_BIT(V2_DMA_WB));
+ }
+
+ return 0;
+}
+
+static int buffer_finish(struct vb2_buffer *vb)
+{
+ return 0;
+}
+
+static void buffer_cleanup(struct vb2_buffer *vb)
+{
+ struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+ struct atmel_isi *isi = ici->priv;
+ struct frame_buffer *buf = container_of(vb, struct frame_buffer, vb);
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(&isi->lock, flags);
+ buf->dma_desc_status = ISI_BUF_NEEDS_INIT;
+ spin_unlock_irqrestore(&isi->lock, flags);
+}
+
+static void start_dma(struct atmel_isi *isi, struct frame_buffer *buffer)
+{
+ u32 ctrl, cfg1;
+ ctrl = isi_readl(isi, V2_CTRL);
+ cfg1 = isi_readl(isi, V2_CFG1);
+ /* Enable irq: cxfr for the codec path, pxfr for the preview path */
+ isi_writel(isi, V2_INTEN,
+ ISI_BIT(V2_CXFR_DONE) | ISI_BIT(V2_PXFR_DONE));
+
+ /* Enable codec path */
+ ctrl |= ISI_BIT(V2_CDC);
+ /* Check if already in a frame */
+ while (isi_readl(isi, V2_STATUS) & ISI_BIT(V2_CDC))
+ cpu_relax();
+
+ /* Write the address of the first frame buffer in the C_ADDR reg
+ * write the address of the first descriptor(link list of buffer)
+ * in the C_DSCR reg, and enable dma channel.
+ */
+ isi_writel(isi, V2_DMA_C_DSCR, (__pa(&(buffer->fb_desc))));
+ isi_writel(isi, V2_DMA_C_CTRL,
+ ISI_BIT(V2_DMA_FETCH) | ISI_BIT(V2_DMA_DONE));
+ isi_writel(isi, V2_DMA_CHER, ISI_BIT(V2_DMA_C_CH_EN));
+
+ /* Enable linked list */
+ cfg1 |= ISI_BF(V2_FRATE, isi->pdata->frate) | ISI_BIT(V2_DISCR);
+
+ /* Enable ISI module*/
+ ctrl |= ISI_BIT(V2_ENABLE);
+ isi_writel(isi, V2_CTRL, ctrl);
+ isi_writel(isi, V2_CFG1, cfg1);
+}
+
+static void buffer_queue(struct vb2_buffer *vb)
+{
+ struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+ struct atmel_isi *isi = ici->priv;
+ struct frame_buffer *buf = container_of(vb, struct frame_buffer, vb);
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(&isi->lock, flags);
+ list_add_tail(&buf->list, &isi->video_buffer_list);
+
+ if (isi->active == NULL) {
+ isi->active = buf;
+ start_dma(isi, buf);
+ }
+ spin_unlock_irqrestore(&isi->lock, flags);
+}
+
+static int start_streaming(struct vb2_queue *vq)
+{
+ struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+ struct atmel_isi *isi = ici->priv;
+
+ u32 sr = 0;
+ int ret;
+
+ spin_lock_irq(&isi->lock);
+ isi->state = STATE_IDLE;
+
+ /* Clear any pending SOF interrupt */
+ sr = isi_readl(isi, V2_STATUS);
+ /* Enable VSYNC interrupt for SOF */
+ isi_writel(isi, V2_INTEN, ISI_BIT(V2_VSYNC));
+ isi_writel(isi, V2_CTRL, isi_readl(isi, V2_CTRL) | ISI_BIT(V2_EN));
+
+ spin_unlock_irq(&isi->lock);
+ dev_dbg(icd->dev.parent, "isi: waiting for SOF\n");
+ ret = wait_event_interruptible(isi->capture_wq,
+ isi->state != STATE_IDLE);
+ if (ret)
+ return ret;
+
+ if (isi->state != STATE_CAPTURE_READY)
+ return -EIO;
+
+ spin_lock_irq(&isi->lock);
+ isi->state = STATE_CAPTURE_WAIT_SOF;
+ isi_writel(isi, V2_INTDIS, ISI_BIT(V2_VSYNC));
+ spin_unlock_irq(&isi->lock);
+
+ return 0;
+}
+
+/* abort streaming and wait for last buffer */
+static int stop_streaming(struct vb2_queue *vq)
+{
+ struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+ struct atmel_isi *isi = ici->priv;
+
+ spin_lock_irq(&isi->lock);
+ isi->still_capture = 0;
+ isi->active = NULL;
+
+ while (isi_readl(isi, V2_STATUS) & ISI_BIT(V2_CDC))
+ cpu_relax();
+
+ /* Disble codec path */
+ isi_writel(isi, V2_CTRL, isi_readl(isi, V2_CTRL) & (~ISI_BIT(V2_CDC)));
+ /* Disable interrupts */
+ isi_writel(isi, V2_INTDIS,
+ ISI_BIT(V2_CXFR_DONE) | ISI_BIT(V2_PXFR_DONE));
+ /* Disable ISI module*/
+ isi_writel(isi, V2_CTRL, isi_readl(isi, V2_CTRL) | ISI_BIT(V2_DIS));
+
+ /* Release all active buffers */
+ while (!list_empty(&isi->video_buffer_list)) {
+ struct frame_buffer *buf;
+ buf = list_entry(isi->video_buffer_list.next,
+ struct frame_buffer, list);
+ list_del_init(&buf->list);
+ vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
+ }
+
+ spin_unlock_irq(&isi->lock);
+ return 0;
+}
+
+static struct vb2_ops isi_video_qops = {
+ .queue_setup = queue_setup,
+ .buf_init = buffer_init,
+ .buf_prepare = buffer_prepare,
+ .buf_finish = buffer_finish,
+ .buf_cleanup = buffer_cleanup,
+ .buf_queue = buffer_queue,
+ .start_streaming = start_streaming,
+ .stop_streaming = stop_streaming,
+ .wait_prepare = soc_camera_unlock,
+ .wait_finish = soc_camera_lock,
+};
+
+/* ------------------------------------------------------------------
+ SOC camera operations for the device
+ ------------------------------------------------------------------*/
+static int isi_camera_init_videobuf(struct vb2_queue *q,
+ struct soc_camera_device *icd)
+{
+ q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
+ q->drv_priv = icd;
+ q->buf_struct_size = sizeof(struct frame_buffer);
+ q->ops = &isi_video_qops;
+ q->mem_ops = &vb2_dma_contig_memops;
+
+ return vb2_queue_init(q);
+}
+static inline void stride_align(u32 *width)
+{
+ if (((*width + 7) & ~7) < 4096)
+ *width = (*width + 7) & ~7;
+ else
+ *width = *width & ~7;
+}
+
+static int isi_camera_set_fmt(struct soc_camera_device *icd,
+ struct v4l2_format *f)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+ struct atmel_isi *isi = ici->priv;
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ const struct soc_camera_format_xlate *xlate;
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct v4l2_mbus_framefmt mf;
+ int ret;
+
+ xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
+ if (!xlate) {
+ dev_warn(icd->dev.parent, "Format %x not found\n",
+ pix->pixelformat);
+ return -EINVAL;
+ }
+
+ stride_align(&pix->width);
+ dev_dbg(icd->dev.parent, "plan to set format %dx%d\n",
+ pix->width, pix->height);
+
+ mf.width = pix->width;
+ mf.height = pix->height;
+ mf.field = pix->field;
+ mf.colorspace = pix->colorspace;
+ mf.code = xlate->code;
+
+ ret = v4l2_subdev_call(sd, video, s_mbus_fmt, &mf);
+ if (ret < 0)
+ return ret;
+
+ if (mf.code != xlate->code)
+ return -EINVAL;
+
+ ret = configure_geometry(isi, pix->width, pix->height, xlate->code);
+ if (ret < 0)
+ return ret;
+
+ pix->width = mf.width;
+ pix->height = mf.height;
+ pix->field = mf.field;
+ pix->colorspace = mf.colorspace;
+ icd->current_fmt = xlate;
+
+ pix->bytesperline = soc_mbus_bytes_per_line(pix->width,
+ xlate->host_fmt);
+ if (pix->bytesperline < 0)
+ return pix->bytesperline;
+ pix->sizeimage = pix->height * pix->bytesperline;
+
+ dev_dbg(icd->dev.parent, "Finally set format %dx%d, sizeimage = %d\n",
+ pix->width, pix->height, pix->sizeimage);
+
+ return ret;
+}
+
+static int isi_camera_try_fmt(struct soc_camera_device *icd,
+ struct v4l2_format *f)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ const struct soc_camera_format_xlate *xlate;
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct v4l2_mbus_framefmt mf;
+ __u32 pixfmt = pix->pixelformat;
+ int ret;
+
+ xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
+ if (pixfmt && !xlate) {
+ dev_warn(icd->dev.parent, "Format %x not found\n", pixfmt);
+ return -EINVAL;
+ }
+
+ /* limit to Atmel ISI hardware capabilities */
+ if (pix->height > MAX_SUPPORT_HEIGHT)
+ pix->height = MAX_SUPPORT_HEIGHT;
+ if (pix->width > MAX_SUPPORT_WIDTH)
+ pix->width = MAX_SUPPORT_WIDTH;
+
+ pix->bytesperline = soc_mbus_bytes_per_line(pix->width,
+ xlate->host_fmt);
+ if (pix->bytesperline < 0)
+ return pix->bytesperline;
+ pix->sizeimage = pix->height * pix->bytesperline;
+
+ /* limit to sensor capabilities */
+ mf.width = pix->width;
+ mf.height = pix->height;
+ mf.field = pix->field;
+ mf.colorspace = pix->colorspace;
+ mf.code = xlate->code;
+
+ ret = v4l2_subdev_call(sd, video, try_mbus_fmt, &mf);
+ if (ret < 0)
+ return ret;
+
+ pix->width = mf.width;
+ pix->height = mf.height;
+ pix->colorspace = mf.colorspace;
+
+ switch (mf.field) {
+ case V4L2_FIELD_ANY:
+ pix->field = V4L2_FIELD_NONE;
+ break;
+ case V4L2_FIELD_NONE:
+ break;
+ default:
+ dev_err(icd->dev.parent, "Field type %d unsupported.\n",
+ mf.field);
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static const struct soc_mbus_pixelfmt isi_camera_formats[] = {
+ {
+ .fourcc = V4L2_PIX_FMT_YUYV,
+ .name = "Packed YUV422 16 bit",
+ .bits_per_sample = 8,
+ .packing = SOC_MBUS_PACKING_2X8_PADHI,
+ .order = SOC_MBUS_ORDER_LE,
+ },
+};
+
+/* This will be corrected as we get more formats */
+static bool isi_camera_packing_supported(const struct soc_mbus_pixelfmt *fmt)
+{
+ return fmt->packing == SOC_MBUS_PACKING_NONE ||
+ (fmt->bits_per_sample == 8 &&
+ fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) ||
+ (fmt->bits_per_sample > 8 &&
+ fmt->packing == SOC_MBUS_PACKING_EXTEND16);
+}
+
+static int test_platform_param(struct atmel_isi *isi,
+ unsigned char buswidth, unsigned long *flags)
+{
+ /*
+ * Platform specified synchronization and pixel clock polarities are
+ * only a recommendation and are only used during probing. Atmel ISI
+ * camera interface only works in master mode, i.e., uses HSYNC and
+ * VSYNC signals from the sensor
+ */
+ *flags = SOCAM_MASTER |
+ SOCAM_HSYNC_ACTIVE_HIGH |
+ SOCAM_HSYNC_ACTIVE_LOW |
+ SOCAM_VSYNC_ACTIVE_HIGH |
+ SOCAM_VSYNC_ACTIVE_LOW |
+ SOCAM_PCLK_SAMPLE_RISING |
+ SOCAM_PCLK_SAMPLE_FALLING |
+ SOCAM_DATA_ACTIVE_HIGH;
+
+ /* If requested data width is supported by the platform, use it */
+ switch (buswidth) {
+ case 10:
+ if (!(isi->platform_flags & ISI_DATAWIDTH_10))
+ return -EINVAL;
+ *flags |= SOCAM_DATAWIDTH_10;
+ break;
+ case 8:
+ if (!(isi->platform_flags & ISI_DATAWIDTH_8))
+ return -EINVAL;
+ *flags |= SOCAM_DATAWIDTH_8;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int isi_camera_try_bus_param(struct soc_camera_device *icd,
+ unsigned char buswidth)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+ struct atmel_isi *isi = ici->priv;
+ unsigned long bus_flags, camera_flags;
+ int ret = test_platform_param(isi, buswidth, &bus_flags);
+
+ if (ret < 0)
+ return ret;
+
+ camera_flags = icd->ops->query_bus_param(icd);
+
+ ret = soc_camera_bus_param_compatible(camera_flags, bus_flags);
+ if (!ret)
+ return -EINVAL;
+ return 0;
+}
+
+
+static int isi_camera_get_formats(struct soc_camera_device *icd,
+ unsigned int idx,
+ struct soc_camera_format_xlate *xlate)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ struct device *dev = icd->dev.parent;
+ int formats = 0, ret;
+ /* sensor format */
+ enum v4l2_mbus_pixelcode code;
+ /* soc camera host format */
+ const struct soc_mbus_pixelfmt *fmt;
+
+ ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
+ if (ret < 0)
+ /* No more formats */
+ return 0;
+
+ fmt = soc_mbus_get_fmtdesc(code);
+ if (!fmt) {
+ dev_err(icd->dev.parent,
+ "Invalid format code #%u: %d\n", idx, code);
+ return 0;
+ }
+
+ /* This also checks support for the requested bits-per-sample */
+ ret = isi_camera_try_bus_param(icd, fmt->bits_per_sample);
+ if (ret < 0) {
+ dev_err(icd->dev.parent,
+ "Fail to try the bus parameters.\n");
+ return 0;
+ }
+
+ switch (code) {
+ case V4L2_MBUS_FMT_UYVY8_2X8:
+ case V4L2_MBUS_FMT_VYUY8_2X8:
+ case V4L2_MBUS_FMT_YUYV8_2X8:
+ case V4L2_MBUS_FMT_YVYU8_2X8:
+ formats++;
+ if (xlate) {
+ xlate->host_fmt = &isi_camera_formats[0];
+ xlate->code = code;
+ xlate++;
+ dev_dbg(icd->dev.parent, "Providing format %s using code %d\n",
+ isi_camera_formats[0].name, code);
+ }
+ break;
+ default:
+ if (!isi_camera_packing_supported(fmt))
+ return 0;
+ if (xlate)
+ dev_dbg(dev,
+ "Providing format %s in pass-through mode\n",
+ fmt->name);
+ }
+
+ /* Generic pass-through */
+ formats++;
+ if (xlate) {
+ xlate->host_fmt = fmt;
+ xlate->code = code;
+ xlate++;
+ }
+
+ return formats;
+}
+
+/* Called with .video_lock held */
+static int isi_camera_add_device(struct soc_camera_device *icd)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+ struct atmel_isi *isi = ici->priv;
+ int ret;
+
+ if (isi->icd)
+ return -EBUSY;
+
+ ret = atmel_isi_init(isi);
+ if (ret)
+ return ret;
+
+ isi->icd = icd;
+ dev_info(icd->dev.parent, "Atmel ISI Camera driver attached to camera %d\n",
+ icd->devnum);
+ return 0;
+}
+/* Called with .video_lock held */
+static void isi_camera_remove_device(struct soc_camera_device *icd)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+ struct atmel_isi *isi = ici->priv;
+
+ BUG_ON(icd != isi->icd);
+
+ isi_writel(isi, V2_CTRL, ISI_BIT(V2_DIS));
+ /* Check if module disable */
+ while (isi_readl(isi, V2_STATUS) & ISI_BIT(V2_DIS))
+ cpu_relax();
+
+ isi->icd = NULL;
+
+ dev_info(icd->dev.parent, "Atmel ISI Camera driver detached from camera %d\n",
+ icd->devnum);
+}
+
+static unsigned int isi_camera_poll(struct file *file, poll_table *pt)
+{
+ struct soc_camera_device *icd = file->private_data;
+
+ return vb2_poll(&icd->vb2_vidq, file, pt);
+}
+
+static int isi_camera_querycap(struct soc_camera_host *ici,
+ struct v4l2_capability *cap)
+{
+ strcpy(cap->driver, "atmel-isi");
+ strcpy(cap->card, "Atmel Image Sensor Interface");
+ cap->version = ATMEL_ISI_VERSION;
+
+ cap->capabilities = (V4L2_CAP_VIDEO_CAPTURE
+ | V4L2_CAP_READWRITE
+ | V4L2_CAP_STREAMING
+ );
+ return 0;
+}
+
+static int isi_camera_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+ struct atmel_isi *isi = ici->priv;
+ unsigned long bus_flags, camera_flags, common_flags;
+ const struct soc_mbus_pixelfmt *fmt;
+ int ret;
+ u32 cfg1, ctrl;
+
+ fmt = soc_mbus_get_fmtdesc(icd->current_fmt->code);
+ if (!fmt)
+ return -EINVAL;
+
+ ret = test_platform_param(isi, fmt->bits_per_sample, &bus_flags);
+ if (ret < 0)
+ return ret;
+
+ camera_flags = icd->ops->query_bus_param(icd);
+
+ common_flags = soc_camera_bus_param_compatible(camera_flags, bus_flags);
+ dev_dbg(icd->dev.parent, "Flags cam: 0x%lx host: 0x%lx common: 0x%lx\n",
+ camera_flags, bus_flags, common_flags);
+ if (!common_flags)
+ return -EINVAL;
+
+ /* Make choises, based on platform preferences */
+ if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) &&
+ (common_flags & SOCAM_HSYNC_ACTIVE_LOW)) {
+ if (isi->pdata->hsync_act_low)
+ common_flags &= ~SOCAM_HSYNC_ACTIVE_HIGH;
+ else
+ common_flags &= ~SOCAM_HSYNC_ACTIVE_LOW;
+ }
+
+ if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) &&
+ (common_flags & SOCAM_VSYNC_ACTIVE_LOW)) {
+ if (isi->pdata->vsync_act_low)
+ common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH;
+ else
+ common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW;
+ }
+
+ if ((common_flags & SOCAM_PCLK_SAMPLE_RISING) &&
+ (common_flags & SOCAM_PCLK_SAMPLE_FALLING)) {
+ if (isi->pdata->pclk_act_falling)
+ common_flags &= ~SOCAM_PCLK_SAMPLE_RISING;
+ else
+ common_flags &= ~SOCAM_PCLK_SAMPLE_FALLING;
+ }
+
+ ret = icd->ops->set_bus_param(icd, common_flags);
+ if (ret < 0) {
+ dev_dbg(icd->dev.parent, "camera set_bus_param(%lx) returned %d\n",
+ common_flags, ret);
+ return ret;
+ }
+
+ /* set bus param for ISI */
+ if (common_flags & SOCAM_PCLK_SAMPLE_FALLING)
+ isi->pdata->pclk_act_falling = 1;
+ if (common_flags & SOCAM_HSYNC_ACTIVE_LOW)
+ isi->pdata->hsync_act_low = 1;
+ if (common_flags & SOCAM_VSYNC_ACTIVE_LOW)
+ isi->pdata->vsync_act_low = 1;
+
+ cfg1 = ISI_BF(V2_EMB_SYNC, (isi->pdata->has_emb_sync))
+ | ISI_BF(V2_HSYNC_POL, isi->pdata->hsync_act_low)
+ | ISI_BF(V2_VSYNC_POL, isi->pdata->vsync_act_low)
+ | ISI_BF(V2_PIXCLK_POL, isi->pdata->pclk_act_falling)
+ | ISI_BF(V2_FULL, isi->pdata->isi_full_mode);
+
+ ctrl = ISI_BIT(DIS);
+ isi_writel(isi, V2_CFG1, cfg1);
+ isi_writel(isi, V2_CTRL, ctrl);
+
+ return 0;
+}
+
+static struct soc_camera_host_ops isi_soc_camera_host_ops = {
+ .owner = THIS_MODULE,
+ .add = isi_camera_add_device,
+ .remove = isi_camera_remove_device,
+ .set_fmt = isi_camera_set_fmt,
+ .try_fmt = isi_camera_try_fmt,
+ .get_formats = isi_camera_get_formats,
+ .init_videobuf2 = isi_camera_init_videobuf,
+ .poll = isi_camera_poll,
+ .querycap = isi_camera_querycap,
+ .set_bus_param = isi_camera_set_bus_param,
+};
+
+/* -----------------------------------------------------------------------*/
+static int __exit atmel_isi_remove(struct platform_device *pdev)
+{
+ struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
+ struct atmel_isi *isi = container_of(soc_host,
+ struct atmel_isi, soc_host);
+
+ soc_camera_host_unregister(soc_host);
+ vb2_dma_contig_cleanup_ctx(isi->alloc_ctx);
+
+ free_irq(isi->irq, isi);
+ iounmap(isi->regs);
+ clk_disable(isi->pclk);
+ clk_put(isi->pclk);
+
+ return 0;
+}
+
+static int __init atmel_isi_probe(struct platform_device *pdev)
+{
+ unsigned int irq;
+ struct atmel_isi *isi;
+ struct clk *pclk;
+ struct resource *regs;
+ int ret;
+ struct device *dev = &pdev->dev;
+ struct isi_platform_data *pdata;
+ struct soc_camera_host *soc_host;
+
+ regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!regs)
+ return -ENXIO;
+
+ pclk = clk_get(&pdev->dev, "isi_clk");
+ if (IS_ERR(pclk))
+ return PTR_ERR(pclk);
+
+ clk_enable(pclk);
+
+ isi = kzalloc(sizeof(struct atmel_isi), GFP_KERNEL);
+ if (!isi) {
+ ret = -ENOMEM;
+ dev_err(&pdev->dev, "can't allocate interface!\n");
+ goto err_alloc_isi;
+ }
+
+ isi->pclk = pclk;
+
+ spin_lock_init(&isi->lock);
+ init_waitqueue_head(&isi->capture_wq);
+
+ isi->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
+ if (IS_ERR(isi->alloc_ctx)) {
+ ret = PTR_ERR(isi->alloc_ctx);
+ goto err_alloc_isi;
+ }
+
+ isi->regs = ioremap(regs->start, resource_size(regs));
+ if (!isi->regs) {
+ ret = -ENOMEM;
+ goto err_ioremap;
+ }
+
+ if (dev->platform_data)
+ pdata = (struct isi_platform_data *) dev->platform_data;
+ else {
+ static struct isi_platform_data isi_default_data = {
+ .frate = 0,
+ .has_emb_sync = 0,
+ .emb_crc_sync = 0,
+ .hsync_act_low = 0,
+ .vsync_act_low = 0,
+ .pclk_act_falling = 0,
+ .isi_full_mode = 1,
+ /* to use codec and preview path simultaneously */
+ .flags = ISI_DATAWIDTH_8 |
+ ISI_DATAWIDTH_10,
+ };
+ dev_info(&pdev->dev,
+ "No config available using default values\n");
+ pdata = &isi_default_data;
+ }
+
+ isi->pdata = pdata;
+ isi->platform_flags = pdata->flags;
+ if (isi->platform_flags == 0)
+ isi->platform_flags = ISI_DATAWIDTH_8;
+
+ isi_writel(isi, V2_CTRL, ISI_BIT(V2_DIS));
+ /* Check if module disable */
+ while (isi_readl(isi, V2_STATUS) & ISI_BIT(V2_DIS))
+ cpu_relax();
+
+ irq = platform_get_irq(pdev, 0);
+ ret = request_irq(irq, isi_interrupt, 0, "isi", isi);
+ if (ret) {
+ dev_err(&pdev->dev, "unable to request irq %d\n", irq);
+ goto err_req_irq;
+ }
+ isi->irq = irq;
+
+ INIT_LIST_HEAD(&isi->video_buffer_list);
+ isi->still_capture = 0;
+ isi->active = NULL;
+
+ soc_host = &isi->soc_host;
+ soc_host->drv_name = "isi-camera";
+ soc_host->ops = &isi_soc_camera_host_ops;
+ soc_host->priv = isi;
+ soc_host->v4l2_dev.dev = &pdev->dev;
+ soc_host->nr = pdev->id;
+
+ ret = soc_camera_host_register(soc_host);
+ if (ret) {
+ dev_err(&pdev->dev, "unable to register soc camera host\n");
+ goto err_register_soc_camera_host;
+ }
+ return 0;
+
+err_register_soc_camera_host:
+ free_irq(isi->irq, isi);
+err_req_irq:
+ iounmap(isi->regs);
+err_ioremap:
+ vb2_dma_contig_cleanup_ctx(isi->alloc_ctx);
+ kfree(isi);
+err_alloc_isi:
+ clk_disable(pclk);
+
+ return ret;
+}
+
+static struct platform_driver atmel_isi_driver = {
+ .probe = atmel_isi_probe,
+ .remove = __exit_p(atmel_isi_remove),
+ .driver = {
+ .name = "atmel_isi",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init atmel_isi_init_module(void)
+{
+ return platform_driver_probe(&atmel_isi_driver, &atmel_isi_probe);
+}
+
+static void __exit atmel_isi_exit(void)
+{
+ platform_driver_unregister(&atmel_isi_driver);
+}
+module_init(atmel_isi_init_module);
+module_exit(atmel_isi_exit);
+
+MODULE_AUTHOR("Josh Wu <josh.wu@atmel.com>");
+MODULE_DESCRIPTION("The V4L2 driver for Atmel Linux");
+MODULE_LICENSE("GPL");
+MODULE_SUPPORTED_DEVICE("video");
--
1.6.3.3


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