Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753277Ab1ELHmf (ORCPT ); Thu, 12 May 2011 03:42:35 -0400 Received: from newsmtp5.atmel.com ([204.2.163.5]:59917 "EHLO sjogate2.atmel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752679Ab1ELHme (ORCPT ); Thu, 12 May 2011 03:42:34 -0400 From: Josh Wu To: mchehab@redhat.com, linux-media@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, g.liakhovetski@gmx.de, lars.haring@atmel.com, Josh Wu Subject: [PATCH] [media] at91: add Atmel Image Sensor Interface (ISI) support Date: Thu, 12 May 2011 15:42:18 +0800 Message-Id: <1305186138-5656-1-git-send-email-josh.wu@atmel.com> X-Mailer: git-send-email 1.6.3.3 X-OriginalArrivalTime: 12 May 2011 07:42:19.0990 (UTC) FILETIME=[1FA48F60:01CC1078] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 45072 Lines: 1613 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 --- 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 +#include +#include +#include +#include +#include + +/* 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include +#include +#include + +#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 "); +MODULE_DESCRIPTION("The V4L2 driver for Atmel Linux"); +MODULE_LICENSE("GPL"); +MODULE_SUPPORTED_DEVICE("video"); -- 1.6.3.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/