1577 lines
43 KiB
C
1577 lines
43 KiB
C
/*
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* V4L2 Driver for PXA camera host
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*
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* Copyright (C) 2006, Sascha Hauer, Pengutronix
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* Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/io.h>
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#include <linux/delay.h>
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#include <linux/dma-mapping.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/moduleparam.h>
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#include <linux/time.h>
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#include <linux/version.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-dev.h>
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#include <media/videobuf-dma-sg.h>
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#include <media/soc_camera.h>
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#include <linux/videodev2.h>
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#include <asm/dma.h>
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#include <mach/pxa-regs.h>
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#include <mach/camera.h>
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#include "pxa_camera.h"
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#define PXA_CAM_VERSION_CODE KERNEL_VERSION(0, 0, 5)
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#define PXA_CAM_DRV_NAME "pxa27x-camera"
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/* Camera Interface */
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#define CICR0 0x0000
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#define CICR1 0x0004
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#define CICR2 0x0008
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#define CICR3 0x000C
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#define CICR4 0x0010
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#define CISR 0x0014
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#define CIFR 0x0018
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#define CITOR 0x001C
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#define CIBR0 0x0028
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#define CIBR1 0x0030
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#define CIBR2 0x0038
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#define CICR0_DMAEN (1 << 31) /* DMA request enable */
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#define CICR0_PAR_EN (1 << 30) /* Parity enable */
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#define CICR0_SL_CAP_EN (1 << 29) /* Capture enable for slave mode */
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#define CICR0_ENB (1 << 28) /* Camera interface enable */
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#define CICR0_DIS (1 << 27) /* Camera interface disable */
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#define CICR0_SIM (0x7 << 24) /* Sensor interface mode mask */
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#define CICR0_TOM (1 << 9) /* Time-out mask */
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#define CICR0_RDAVM (1 << 8) /* Receive-data-available mask */
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#define CICR0_FEM (1 << 7) /* FIFO-empty mask */
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#define CICR0_EOLM (1 << 6) /* End-of-line mask */
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#define CICR0_PERRM (1 << 5) /* Parity-error mask */
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#define CICR0_QDM (1 << 4) /* Quick-disable mask */
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#define CICR0_CDM (1 << 3) /* Disable-done mask */
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#define CICR0_SOFM (1 << 2) /* Start-of-frame mask */
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#define CICR0_EOFM (1 << 1) /* End-of-frame mask */
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#define CICR0_FOM (1 << 0) /* FIFO-overrun mask */
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#define CICR1_TBIT (1 << 31) /* Transparency bit */
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#define CICR1_RGBT_CONV (0x3 << 29) /* RGBT conversion mask */
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#define CICR1_PPL (0x7ff << 15) /* Pixels per line mask */
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#define CICR1_RGB_CONV (0x7 << 12) /* RGB conversion mask */
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#define CICR1_RGB_F (1 << 11) /* RGB format */
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#define CICR1_YCBCR_F (1 << 10) /* YCbCr format */
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#define CICR1_RGB_BPP (0x7 << 7) /* RGB bis per pixel mask */
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#define CICR1_RAW_BPP (0x3 << 5) /* Raw bis per pixel mask */
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#define CICR1_COLOR_SP (0x3 << 3) /* Color space mask */
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#define CICR1_DW (0x7 << 0) /* Data width mask */
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#define CICR2_BLW (0xff << 24) /* Beginning-of-line pixel clock
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wait count mask */
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#define CICR2_ELW (0xff << 16) /* End-of-line pixel clock
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wait count mask */
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#define CICR2_HSW (0x3f << 10) /* Horizontal sync pulse width mask */
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#define CICR2_BFPW (0x3f << 3) /* Beginning-of-frame pixel clock
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wait count mask */
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#define CICR2_FSW (0x7 << 0) /* Frame stabilization
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wait count mask */
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#define CICR3_BFW (0xff << 24) /* Beginning-of-frame line clock
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wait count mask */
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#define CICR3_EFW (0xff << 16) /* End-of-frame line clock
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wait count mask */
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#define CICR3_VSW (0x3f << 10) /* Vertical sync pulse width mask */
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#define CICR3_BFPW (0x3f << 3) /* Beginning-of-frame pixel clock
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wait count mask */
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#define CICR3_LPF (0x7ff << 0) /* Lines per frame mask */
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#define CICR4_MCLK_DLY (0x3 << 24) /* MCLK Data Capture Delay mask */
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#define CICR4_PCLK_EN (1 << 23) /* Pixel clock enable */
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#define CICR4_PCP (1 << 22) /* Pixel clock polarity */
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#define CICR4_HSP (1 << 21) /* Horizontal sync polarity */
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#define CICR4_VSP (1 << 20) /* Vertical sync polarity */
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#define CICR4_MCLK_EN (1 << 19) /* MCLK enable */
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#define CICR4_FR_RATE (0x7 << 8) /* Frame rate mask */
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#define CICR4_DIV (0xff << 0) /* Clock divisor mask */
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#define CISR_FTO (1 << 15) /* FIFO time-out */
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#define CISR_RDAV_2 (1 << 14) /* Channel 2 receive data available */
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#define CISR_RDAV_1 (1 << 13) /* Channel 1 receive data available */
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#define CISR_RDAV_0 (1 << 12) /* Channel 0 receive data available */
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#define CISR_FEMPTY_2 (1 << 11) /* Channel 2 FIFO empty */
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#define CISR_FEMPTY_1 (1 << 10) /* Channel 1 FIFO empty */
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#define CISR_FEMPTY_0 (1 << 9) /* Channel 0 FIFO empty */
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#define CISR_EOL (1 << 8) /* End of line */
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#define CISR_PAR_ERR (1 << 7) /* Parity error */
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#define CISR_CQD (1 << 6) /* Camera interface quick disable */
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#define CISR_CDD (1 << 5) /* Camera interface disable done */
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#define CISR_SOF (1 << 4) /* Start of frame */
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#define CISR_EOF (1 << 3) /* End of frame */
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#define CISR_IFO_2 (1 << 2) /* FIFO overrun for Channel 2 */
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#define CISR_IFO_1 (1 << 1) /* FIFO overrun for Channel 1 */
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#define CISR_IFO_0 (1 << 0) /* FIFO overrun for Channel 0 */
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#define CIFR_FLVL2 (0x7f << 23) /* FIFO 2 level mask */
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#define CIFR_FLVL1 (0x7f << 16) /* FIFO 1 level mask */
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#define CIFR_FLVL0 (0xff << 8) /* FIFO 0 level mask */
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#define CIFR_THL_0 (0x3 << 4) /* Threshold Level for Channel 0 FIFO */
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#define CIFR_RESET_F (1 << 3) /* Reset input FIFOs */
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#define CIFR_FEN2 (1 << 2) /* FIFO enable for channel 2 */
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#define CIFR_FEN1 (1 << 1) /* FIFO enable for channel 1 */
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#define CIFR_FEN0 (1 << 0) /* FIFO enable for channel 0 */
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#define CICR0_SIM_MP (0 << 24)
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#define CICR0_SIM_SP (1 << 24)
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#define CICR0_SIM_MS (2 << 24)
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#define CICR0_SIM_EP (3 << 24)
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#define CICR0_SIM_ES (4 << 24)
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#define CICR1_DW_VAL(x) ((x) & CICR1_DW) /* Data bus width */
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#define CICR1_PPL_VAL(x) (((x) << 15) & CICR1_PPL) /* Pixels per line */
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#define CICR1_COLOR_SP_VAL(x) (((x) << 3) & CICR1_COLOR_SP) /* color space */
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#define CICR1_RGB_BPP_VAL(x) (((x) << 7) & CICR1_RGB_BPP) /* bpp for rgb */
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#define CICR1_RGBT_CONV_VAL(x) (((x) << 29) & CICR1_RGBT_CONV) /* rgbt conv */
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#define CICR2_BLW_VAL(x) (((x) << 24) & CICR2_BLW) /* Beginning-of-line pixel clock wait count */
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#define CICR2_ELW_VAL(x) (((x) << 16) & CICR2_ELW) /* End-of-line pixel clock wait count */
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#define CICR2_HSW_VAL(x) (((x) << 10) & CICR2_HSW) /* Horizontal sync pulse width */
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#define CICR2_BFPW_VAL(x) (((x) << 3) & CICR2_BFPW) /* Beginning-of-frame pixel clock wait count */
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#define CICR2_FSW_VAL(x) (((x) << 0) & CICR2_FSW) /* Frame stabilization wait count */
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#define CICR3_BFW_VAL(x) (((x) << 24) & CICR3_BFW) /* Beginning-of-frame line clock wait count */
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#define CICR3_EFW_VAL(x) (((x) << 16) & CICR3_EFW) /* End-of-frame line clock wait count */
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#define CICR3_VSW_VAL(x) (((x) << 11) & CICR3_VSW) /* Vertical sync pulse width */
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#define CICR3_LPF_VAL(x) (((x) << 0) & CICR3_LPF) /* Lines per frame */
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#define CICR0_IRQ_MASK (CICR0_TOM | CICR0_RDAVM | CICR0_FEM | CICR0_EOLM | \
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CICR0_PERRM | CICR0_QDM | CICR0_CDM | CICR0_SOFM | \
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CICR0_EOFM | CICR0_FOM)
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/*
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* Structures
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*/
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enum pxa_camera_active_dma {
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DMA_Y = 0x1,
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DMA_U = 0x2,
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DMA_V = 0x4,
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};
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/* descriptor needed for the PXA DMA engine */
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struct pxa_cam_dma {
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dma_addr_t sg_dma;
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struct pxa_dma_desc *sg_cpu;
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size_t sg_size;
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int sglen;
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};
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/* buffer for one video frame */
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struct pxa_buffer {
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/* common v4l buffer stuff -- must be first */
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struct videobuf_buffer vb;
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const struct soc_camera_data_format *fmt;
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/* our descriptor lists for Y, U and V channels */
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struct pxa_cam_dma dmas[3];
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int inwork;
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enum pxa_camera_active_dma active_dma;
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};
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struct pxa_camera_dev {
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struct device *dev;
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/* PXA27x is only supposed to handle one camera on its Quick Capture
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* interface. If anyone ever builds hardware to enable more than
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* one camera, they will have to modify this driver too */
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struct soc_camera_device *icd;
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struct clk *clk;
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unsigned int irq;
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void __iomem *base;
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int channels;
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unsigned int dma_chans[3];
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struct pxacamera_platform_data *pdata;
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struct resource *res;
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unsigned long platform_flags;
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unsigned long ciclk;
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unsigned long mclk;
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u32 mclk_divisor;
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struct list_head capture;
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spinlock_t lock;
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struct pxa_buffer *active;
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struct pxa_dma_desc *sg_tail[3];
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u32 save_cicr[5];
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};
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static const char *pxa_cam_driver_description = "PXA_Camera";
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static unsigned int vid_limit = 16; /* Video memory limit, in Mb */
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/*
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* Videobuf operations
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*/
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static int pxa_videobuf_setup(struct videobuf_queue *vq, unsigned int *count,
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unsigned int *size)
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{
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struct soc_camera_device *icd = vq->priv_data;
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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struct pxa_camera_dev *pcdev = ici->priv;
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dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
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/* planar capture requires Y, U and V buffers to be page aligned */
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if (pcdev->channels == 3) {
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*size = PAGE_ALIGN(icd->width * icd->height); /* Y pages */
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*size += PAGE_ALIGN(icd->width * icd->height / 2); /* U pages */
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*size += PAGE_ALIGN(icd->width * icd->height / 2); /* V pages */
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} else {
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*size = icd->width * icd->height *
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((icd->current_fmt->depth + 7) >> 3);
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}
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if (0 == *count)
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*count = 32;
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while (*size * *count > vid_limit * 1024 * 1024)
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(*count)--;
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return 0;
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}
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static void free_buffer(struct videobuf_queue *vq, struct pxa_buffer *buf)
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{
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struct soc_camera_device *icd = vq->priv_data;
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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struct pxa_camera_dev *pcdev = ici->priv;
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struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb);
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int i;
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BUG_ON(in_interrupt());
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dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
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&buf->vb, buf->vb.baddr, buf->vb.bsize);
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/* This waits until this buffer is out of danger, i.e., until it is no
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* longer in STATE_QUEUED or STATE_ACTIVE */
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videobuf_waiton(&buf->vb, 0, 0);
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videobuf_dma_unmap(vq, dma);
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videobuf_dma_free(dma);
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for (i = 0; i < ARRAY_SIZE(buf->dmas); i++) {
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if (buf->dmas[i].sg_cpu)
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dma_free_coherent(pcdev->dev, buf->dmas[i].sg_size,
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buf->dmas[i].sg_cpu,
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buf->dmas[i].sg_dma);
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buf->dmas[i].sg_cpu = NULL;
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}
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buf->vb.state = VIDEOBUF_NEEDS_INIT;
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}
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static int pxa_init_dma_channel(struct pxa_camera_dev *pcdev,
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struct pxa_buffer *buf,
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struct videobuf_dmabuf *dma, int channel,
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int sglen, int sg_start, int cibr,
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unsigned int size)
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{
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struct pxa_cam_dma *pxa_dma = &buf->dmas[channel];
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int i;
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if (pxa_dma->sg_cpu)
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dma_free_coherent(pcdev->dev, pxa_dma->sg_size,
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pxa_dma->sg_cpu, pxa_dma->sg_dma);
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pxa_dma->sg_size = (sglen + 1) * sizeof(struct pxa_dma_desc);
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pxa_dma->sg_cpu = dma_alloc_coherent(pcdev->dev, pxa_dma->sg_size,
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&pxa_dma->sg_dma, GFP_KERNEL);
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if (!pxa_dma->sg_cpu)
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return -ENOMEM;
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pxa_dma->sglen = sglen;
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for (i = 0; i < sglen; i++) {
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int sg_i = sg_start + i;
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struct scatterlist *sg = dma->sglist;
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unsigned int dma_len = sg_dma_len(&sg[sg_i]), xfer_len;
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pxa_dma->sg_cpu[i].dsadr = pcdev->res->start + cibr;
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pxa_dma->sg_cpu[i].dtadr = sg_dma_address(&sg[sg_i]);
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/* PXA27x Developer's Manual 27.4.4.1: round up to 8 bytes */
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xfer_len = (min(dma_len, size) + 7) & ~7;
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pxa_dma->sg_cpu[i].dcmd =
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DCMD_FLOWSRC | DCMD_BURST8 | DCMD_INCTRGADDR | xfer_len;
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size -= dma_len;
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pxa_dma->sg_cpu[i].ddadr =
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pxa_dma->sg_dma + (i + 1) * sizeof(struct pxa_dma_desc);
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}
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pxa_dma->sg_cpu[sglen - 1].ddadr = DDADR_STOP;
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pxa_dma->sg_cpu[sglen - 1].dcmd |= DCMD_ENDIRQEN;
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return 0;
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}
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static int pxa_videobuf_prepare(struct videobuf_queue *vq,
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struct videobuf_buffer *vb, enum v4l2_field field)
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{
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struct soc_camera_device *icd = vq->priv_data;
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struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
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struct pxa_camera_dev *pcdev = ici->priv;
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struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb);
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int ret;
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int sglen_y, sglen_yu = 0, sglen_u = 0, sglen_v = 0;
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int size_y, size_u = 0, size_v = 0;
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dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
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vb, vb->baddr, vb->bsize);
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/* Added list head initialization on alloc */
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WARN_ON(!list_empty(&vb->queue));
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#ifdef DEBUG
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/* This can be useful if you want to see if we actually fill
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* the buffer with something */
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memset((void *)vb->baddr, 0xaa, vb->bsize);
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#endif
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BUG_ON(NULL == icd->current_fmt);
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/* I think, in buf_prepare you only have to protect global data,
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* the actual buffer is yours */
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buf->inwork = 1;
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if (buf->fmt != icd->current_fmt ||
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vb->width != icd->width ||
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vb->height != icd->height ||
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vb->field != field) {
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buf->fmt = icd->current_fmt;
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vb->width = icd->width;
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vb->height = icd->height;
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vb->field = field;
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vb->state = VIDEOBUF_NEEDS_INIT;
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}
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vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
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if (0 != vb->baddr && vb->bsize < vb->size) {
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ret = -EINVAL;
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goto out;
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}
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if (vb->state == VIDEOBUF_NEEDS_INIT) {
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unsigned int size = vb->size;
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struct videobuf_dmabuf *dma = videobuf_to_dma(vb);
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ret = videobuf_iolock(vq, vb, NULL);
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if (ret)
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goto fail;
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if (pcdev->channels == 3) {
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/* FIXME the calculations should be more precise */
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sglen_y = dma->sglen / 2;
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sglen_u = sglen_v = dma->sglen / 4 + 1;
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sglen_yu = sglen_y + sglen_u;
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size_y = size / 2;
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size_u = size_v = size / 4;
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} else {
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sglen_y = dma->sglen;
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size_y = size;
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}
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/* init DMA for Y channel */
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ret = pxa_init_dma_channel(pcdev, buf, dma, 0, sglen_y,
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0, 0x28, size_y);
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if (ret) {
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dev_err(pcdev->dev,
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"DMA initialization for Y/RGB failed\n");
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goto fail;
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}
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if (pcdev->channels == 3) {
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/* init DMA for U channel */
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ret = pxa_init_dma_channel(pcdev, buf, dma, 1, sglen_u,
|
|
sglen_y, 0x30, size_u);
|
|
if (ret) {
|
|
dev_err(pcdev->dev,
|
|
"DMA initialization for U failed\n");
|
|
goto fail_u;
|
|
}
|
|
|
|
/* init DMA for V channel */
|
|
ret = pxa_init_dma_channel(pcdev, buf, dma, 2, sglen_v,
|
|
sglen_yu, 0x38, size_v);
|
|
if (ret) {
|
|
dev_err(pcdev->dev,
|
|
"DMA initialization for V failed\n");
|
|
goto fail_v;
|
|
}
|
|
}
|
|
|
|
vb->state = VIDEOBUF_PREPARED;
|
|
}
|
|
|
|
buf->inwork = 0;
|
|
buf->active_dma = DMA_Y;
|
|
if (pcdev->channels == 3)
|
|
buf->active_dma |= DMA_U | DMA_V;
|
|
|
|
return 0;
|
|
|
|
fail_v:
|
|
dma_free_coherent(pcdev->dev, buf->dmas[1].sg_size,
|
|
buf->dmas[1].sg_cpu, buf->dmas[1].sg_dma);
|
|
fail_u:
|
|
dma_free_coherent(pcdev->dev, buf->dmas[0].sg_size,
|
|
buf->dmas[0].sg_cpu, buf->dmas[0].sg_dma);
|
|
fail:
|
|
free_buffer(vq, buf);
|
|
out:
|
|
buf->inwork = 0;
|
|
return ret;
|
|
}
|
|
|
|
static void pxa_videobuf_queue(struct videobuf_queue *vq,
|
|
struct videobuf_buffer *vb)
|
|
{
|
|
struct soc_camera_device *icd = vq->priv_data;
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct pxa_camera_dev *pcdev = ici->priv;
|
|
struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb);
|
|
struct pxa_buffer *active;
|
|
unsigned long flags;
|
|
int i;
|
|
|
|
dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
|
|
vb, vb->baddr, vb->bsize);
|
|
spin_lock_irqsave(&pcdev->lock, flags);
|
|
|
|
list_add_tail(&vb->queue, &pcdev->capture);
|
|
|
|
vb->state = VIDEOBUF_ACTIVE;
|
|
active = pcdev->active;
|
|
|
|
if (!active) {
|
|
unsigned long cifr, cicr0;
|
|
|
|
cifr = __raw_readl(pcdev->base + CIFR) | CIFR_RESET_F;
|
|
__raw_writel(cifr, pcdev->base + CIFR);
|
|
|
|
for (i = 0; i < pcdev->channels; i++) {
|
|
DDADR(pcdev->dma_chans[i]) = buf->dmas[i].sg_dma;
|
|
DCSR(pcdev->dma_chans[i]) = DCSR_RUN;
|
|
pcdev->sg_tail[i] = buf->dmas[i].sg_cpu + buf->dmas[i].sglen - 1;
|
|
}
|
|
|
|
pcdev->active = buf;
|
|
|
|
cicr0 = __raw_readl(pcdev->base + CICR0) | CICR0_ENB;
|
|
__raw_writel(cicr0, pcdev->base + CICR0);
|
|
} else {
|
|
struct pxa_cam_dma *buf_dma;
|
|
struct pxa_cam_dma *act_dma;
|
|
int nents;
|
|
|
|
for (i = 0; i < pcdev->channels; i++) {
|
|
buf_dma = &buf->dmas[i];
|
|
act_dma = &active->dmas[i];
|
|
nents = buf_dma->sglen;
|
|
|
|
/* Stop DMA engine */
|
|
DCSR(pcdev->dma_chans[i]) = 0;
|
|
|
|
/* Add the descriptors we just initialized to
|
|
the currently running chain */
|
|
pcdev->sg_tail[i]->ddadr = buf_dma->sg_dma;
|
|
pcdev->sg_tail[i] = buf_dma->sg_cpu + buf_dma->sglen - 1;
|
|
|
|
/* Setup a dummy descriptor with the DMA engines current
|
|
* state
|
|
*/
|
|
buf_dma->sg_cpu[nents].dsadr =
|
|
pcdev->res->start + 0x28 + i*8; /* CIBRx */
|
|
buf_dma->sg_cpu[nents].dtadr =
|
|
DTADR(pcdev->dma_chans[i]);
|
|
buf_dma->sg_cpu[nents].dcmd =
|
|
DCMD(pcdev->dma_chans[i]);
|
|
|
|
if (DDADR(pcdev->dma_chans[i]) == DDADR_STOP) {
|
|
/* The DMA engine is on the last
|
|
descriptor, set the next descriptors
|
|
address to the descriptors we just
|
|
initialized */
|
|
buf_dma->sg_cpu[nents].ddadr = buf_dma->sg_dma;
|
|
} else {
|
|
buf_dma->sg_cpu[nents].ddadr =
|
|
DDADR(pcdev->dma_chans[i]);
|
|
}
|
|
|
|
/* The next descriptor is the dummy descriptor */
|
|
DDADR(pcdev->dma_chans[i]) = buf_dma->sg_dma + nents *
|
|
sizeof(struct pxa_dma_desc);
|
|
|
|
DCSR(pcdev->dma_chans[i]) = DCSR_RUN;
|
|
}
|
|
}
|
|
|
|
spin_unlock_irqrestore(&pcdev->lock, flags);
|
|
}
|
|
|
|
static void pxa_videobuf_release(struct videobuf_queue *vq,
|
|
struct videobuf_buffer *vb)
|
|
{
|
|
struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb);
|
|
#ifdef DEBUG
|
|
struct soc_camera_device *icd = vq->priv_data;
|
|
|
|
dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
|
|
vb, vb->baddr, vb->bsize);
|
|
|
|
switch (vb->state) {
|
|
case VIDEOBUF_ACTIVE:
|
|
dev_dbg(&icd->dev, "%s (active)\n", __func__);
|
|
break;
|
|
case VIDEOBUF_QUEUED:
|
|
dev_dbg(&icd->dev, "%s (queued)\n", __func__);
|
|
break;
|
|
case VIDEOBUF_PREPARED:
|
|
dev_dbg(&icd->dev, "%s (prepared)\n", __func__);
|
|
break;
|
|
default:
|
|
dev_dbg(&icd->dev, "%s (unknown)\n", __func__);
|
|
break;
|
|
}
|
|
#endif
|
|
|
|
free_buffer(vq, buf);
|
|
}
|
|
|
|
static void pxa_camera_wakeup(struct pxa_camera_dev *pcdev,
|
|
struct videobuf_buffer *vb,
|
|
struct pxa_buffer *buf)
|
|
{
|
|
unsigned long cicr0;
|
|
|
|
/* _init is used to debug races, see comment in pxa_camera_reqbufs() */
|
|
list_del_init(&vb->queue);
|
|
vb->state = VIDEOBUF_DONE;
|
|
do_gettimeofday(&vb->ts);
|
|
vb->field_count++;
|
|
wake_up(&vb->done);
|
|
|
|
if (list_empty(&pcdev->capture)) {
|
|
pcdev->active = NULL;
|
|
DCSR(pcdev->dma_chans[0]) = 0;
|
|
DCSR(pcdev->dma_chans[1]) = 0;
|
|
DCSR(pcdev->dma_chans[2]) = 0;
|
|
|
|
cicr0 = __raw_readl(pcdev->base + CICR0) & ~CICR0_ENB;
|
|
__raw_writel(cicr0, pcdev->base + CICR0);
|
|
return;
|
|
}
|
|
|
|
pcdev->active = list_entry(pcdev->capture.next,
|
|
struct pxa_buffer, vb.queue);
|
|
}
|
|
|
|
static void pxa_camera_dma_irq(int channel, struct pxa_camera_dev *pcdev,
|
|
enum pxa_camera_active_dma act_dma)
|
|
{
|
|
struct pxa_buffer *buf;
|
|
unsigned long flags;
|
|
u32 status, camera_status, overrun;
|
|
struct videobuf_buffer *vb;
|
|
unsigned long cifr, cicr0;
|
|
|
|
spin_lock_irqsave(&pcdev->lock, flags);
|
|
|
|
status = DCSR(channel);
|
|
DCSR(channel) = status | DCSR_ENDINTR;
|
|
|
|
if (status & DCSR_BUSERR) {
|
|
dev_err(pcdev->dev, "DMA Bus Error IRQ!\n");
|
|
goto out;
|
|
}
|
|
|
|
if (!(status & DCSR_ENDINTR)) {
|
|
dev_err(pcdev->dev, "Unknown DMA IRQ source, "
|
|
"status: 0x%08x\n", status);
|
|
goto out;
|
|
}
|
|
|
|
if (!pcdev->active) {
|
|
dev_err(pcdev->dev, "DMA End IRQ with no active buffer!\n");
|
|
goto out;
|
|
}
|
|
|
|
camera_status = __raw_readl(pcdev->base + CISR);
|
|
overrun = CISR_IFO_0;
|
|
if (pcdev->channels == 3)
|
|
overrun |= CISR_IFO_1 | CISR_IFO_2;
|
|
if (camera_status & overrun) {
|
|
dev_dbg(pcdev->dev, "FIFO overrun! CISR: %x\n", camera_status);
|
|
/* Stop the Capture Interface */
|
|
cicr0 = __raw_readl(pcdev->base + CICR0) & ~CICR0_ENB;
|
|
__raw_writel(cicr0, pcdev->base + CICR0);
|
|
|
|
/* Stop DMA */
|
|
DCSR(channel) = 0;
|
|
/* Reset the FIFOs */
|
|
cifr = __raw_readl(pcdev->base + CIFR) | CIFR_RESET_F;
|
|
__raw_writel(cifr, pcdev->base + CIFR);
|
|
/* Enable End-Of-Frame Interrupt */
|
|
cicr0 &= ~CICR0_EOFM;
|
|
__raw_writel(cicr0, pcdev->base + CICR0);
|
|
/* Restart the Capture Interface */
|
|
__raw_writel(cicr0 | CICR0_ENB, pcdev->base + CICR0);
|
|
goto out;
|
|
}
|
|
|
|
vb = &pcdev->active->vb;
|
|
buf = container_of(vb, struct pxa_buffer, vb);
|
|
WARN_ON(buf->inwork || list_empty(&vb->queue));
|
|
dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
|
|
vb, vb->baddr, vb->bsize);
|
|
|
|
buf->active_dma &= ~act_dma;
|
|
if (!buf->active_dma)
|
|
pxa_camera_wakeup(pcdev, vb, buf);
|
|
|
|
out:
|
|
spin_unlock_irqrestore(&pcdev->lock, flags);
|
|
}
|
|
|
|
static void pxa_camera_dma_irq_y(int channel, void *data)
|
|
{
|
|
struct pxa_camera_dev *pcdev = data;
|
|
pxa_camera_dma_irq(channel, pcdev, DMA_Y);
|
|
}
|
|
|
|
static void pxa_camera_dma_irq_u(int channel, void *data)
|
|
{
|
|
struct pxa_camera_dev *pcdev = data;
|
|
pxa_camera_dma_irq(channel, pcdev, DMA_U);
|
|
}
|
|
|
|
static void pxa_camera_dma_irq_v(int channel, void *data)
|
|
{
|
|
struct pxa_camera_dev *pcdev = data;
|
|
pxa_camera_dma_irq(channel, pcdev, DMA_V);
|
|
}
|
|
|
|
static struct videobuf_queue_ops pxa_videobuf_ops = {
|
|
.buf_setup = pxa_videobuf_setup,
|
|
.buf_prepare = pxa_videobuf_prepare,
|
|
.buf_queue = pxa_videobuf_queue,
|
|
.buf_release = pxa_videobuf_release,
|
|
};
|
|
|
|
static void pxa_camera_init_videobuf(struct videobuf_queue *q,
|
|
struct soc_camera_device *icd)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct pxa_camera_dev *pcdev = ici->priv;
|
|
|
|
/* We must pass NULL as dev pointer, then all pci_* dma operations
|
|
* transform to normal dma_* ones. */
|
|
videobuf_queue_sg_init(q, &pxa_videobuf_ops, NULL, &pcdev->lock,
|
|
V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_NONE,
|
|
sizeof(struct pxa_buffer), icd);
|
|
}
|
|
|
|
static u32 mclk_get_divisor(struct pxa_camera_dev *pcdev)
|
|
{
|
|
unsigned long mclk = pcdev->mclk;
|
|
u32 div;
|
|
unsigned long lcdclk;
|
|
|
|
lcdclk = clk_get_rate(pcdev->clk);
|
|
pcdev->ciclk = lcdclk;
|
|
|
|
/* mclk <= ciclk / 4 (27.4.2) */
|
|
if (mclk > lcdclk / 4) {
|
|
mclk = lcdclk / 4;
|
|
dev_warn(pcdev->dev, "Limiting master clock to %lu\n", mclk);
|
|
}
|
|
|
|
/* We verify mclk != 0, so if anyone breaks it, here comes their Oops */
|
|
div = (lcdclk + 2 * mclk - 1) / (2 * mclk) - 1;
|
|
|
|
/* If we're not supplying MCLK, leave it at 0 */
|
|
if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
|
|
pcdev->mclk = lcdclk / (2 * (div + 1));
|
|
|
|
dev_dbg(pcdev->dev, "LCD clock %luHz, target freq %luHz, "
|
|
"divisor %u\n", lcdclk, mclk, div);
|
|
|
|
return div;
|
|
}
|
|
|
|
static void recalculate_fifo_timeout(struct pxa_camera_dev *pcdev,
|
|
unsigned long pclk)
|
|
{
|
|
/* We want a timeout > 1 pixel time, not ">=" */
|
|
u32 ciclk_per_pixel = pcdev->ciclk / pclk + 1;
|
|
|
|
__raw_writel(ciclk_per_pixel, pcdev->base + CITOR);
|
|
}
|
|
|
|
static void pxa_camera_activate(struct pxa_camera_dev *pcdev)
|
|
{
|
|
struct pxacamera_platform_data *pdata = pcdev->pdata;
|
|
u32 cicr4 = 0;
|
|
|
|
dev_dbg(pcdev->dev, "Registered platform device at %p data %p\n",
|
|
pcdev, pdata);
|
|
|
|
if (pdata && pdata->init) {
|
|
dev_dbg(pcdev->dev, "%s: Init gpios\n", __func__);
|
|
pdata->init(pcdev->dev);
|
|
}
|
|
|
|
/* disable all interrupts */
|
|
__raw_writel(0x3ff, pcdev->base + CICR0);
|
|
|
|
if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN)
|
|
cicr4 |= CICR4_PCLK_EN;
|
|
if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
|
|
cicr4 |= CICR4_MCLK_EN;
|
|
if (pcdev->platform_flags & PXA_CAMERA_PCP)
|
|
cicr4 |= CICR4_PCP;
|
|
if (pcdev->platform_flags & PXA_CAMERA_HSP)
|
|
cicr4 |= CICR4_HSP;
|
|
if (pcdev->platform_flags & PXA_CAMERA_VSP)
|
|
cicr4 |= CICR4_VSP;
|
|
|
|
__raw_writel(pcdev->mclk_divisor | cicr4, pcdev->base + CICR4);
|
|
|
|
if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
|
|
/* Initialise the timeout under the assumption pclk = mclk */
|
|
recalculate_fifo_timeout(pcdev, pcdev->mclk);
|
|
else
|
|
/* "Safe default" - 13MHz */
|
|
recalculate_fifo_timeout(pcdev, 13000000);
|
|
|
|
clk_enable(pcdev->clk);
|
|
}
|
|
|
|
static void pxa_camera_deactivate(struct pxa_camera_dev *pcdev)
|
|
{
|
|
clk_disable(pcdev->clk);
|
|
}
|
|
|
|
static irqreturn_t pxa_camera_irq(int irq, void *data)
|
|
{
|
|
struct pxa_camera_dev *pcdev = data;
|
|
unsigned long status, cicr0;
|
|
|
|
status = __raw_readl(pcdev->base + CISR);
|
|
dev_dbg(pcdev->dev, "Camera interrupt status 0x%lx\n", status);
|
|
|
|
if (!status)
|
|
return IRQ_NONE;
|
|
|
|
__raw_writel(status, pcdev->base + CISR);
|
|
|
|
if (status & CISR_EOF) {
|
|
int i;
|
|
for (i = 0; i < pcdev->channels; i++) {
|
|
DDADR(pcdev->dma_chans[i]) =
|
|
pcdev->active->dmas[i].sg_dma;
|
|
DCSR(pcdev->dma_chans[i]) = DCSR_RUN;
|
|
}
|
|
cicr0 = __raw_readl(pcdev->base + CICR0) | CICR0_EOFM;
|
|
__raw_writel(cicr0, pcdev->base + CICR0);
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/*
|
|
* The following two functions absolutely depend on the fact, that
|
|
* there can be only one camera on PXA quick capture interface
|
|
* Called with .video_lock held
|
|
*/
|
|
static int pxa_camera_add_device(struct soc_camera_device *icd)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct pxa_camera_dev *pcdev = ici->priv;
|
|
int ret;
|
|
|
|
if (pcdev->icd) {
|
|
ret = -EBUSY;
|
|
goto ebusy;
|
|
}
|
|
|
|
dev_info(&icd->dev, "PXA Camera driver attached to camera %d\n",
|
|
icd->devnum);
|
|
|
|
pxa_camera_activate(pcdev);
|
|
ret = icd->ops->init(icd);
|
|
|
|
if (!ret)
|
|
pcdev->icd = icd;
|
|
|
|
ebusy:
|
|
return ret;
|
|
}
|
|
|
|
/* Called with .video_lock held */
|
|
static void pxa_camera_remove_device(struct soc_camera_device *icd)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct pxa_camera_dev *pcdev = ici->priv;
|
|
|
|
BUG_ON(icd != pcdev->icd);
|
|
|
|
dev_info(&icd->dev, "PXA Camera driver detached from camera %d\n",
|
|
icd->devnum);
|
|
|
|
/* disable capture, disable interrupts */
|
|
__raw_writel(0x3ff, pcdev->base + CICR0);
|
|
|
|
/* Stop DMA engine */
|
|
DCSR(pcdev->dma_chans[0]) = 0;
|
|
DCSR(pcdev->dma_chans[1]) = 0;
|
|
DCSR(pcdev->dma_chans[2]) = 0;
|
|
|
|
icd->ops->release(icd);
|
|
|
|
pxa_camera_deactivate(pcdev);
|
|
|
|
pcdev->icd = NULL;
|
|
}
|
|
|
|
static int test_platform_param(struct pxa_camera_dev *pcdev,
|
|
unsigned char buswidth, unsigned long *flags)
|
|
{
|
|
/*
|
|
* Platform specified synchronization and pixel clock polarities are
|
|
* only a recommendation and are only used during probing. The PXA270
|
|
* quick capture interface supports both.
|
|
*/
|
|
*flags = (pcdev->platform_flags & PXA_CAMERA_MASTER ?
|
|
SOCAM_MASTER : SOCAM_SLAVE) |
|
|
SOCAM_HSYNC_ACTIVE_HIGH |
|
|
SOCAM_HSYNC_ACTIVE_LOW |
|
|
SOCAM_VSYNC_ACTIVE_HIGH |
|
|
SOCAM_VSYNC_ACTIVE_LOW |
|
|
SOCAM_PCLK_SAMPLE_RISING |
|
|
SOCAM_PCLK_SAMPLE_FALLING;
|
|
|
|
/* If requested data width is supported by the platform, use it */
|
|
switch (buswidth) {
|
|
case 10:
|
|
if (!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_10))
|
|
return -EINVAL;
|
|
*flags |= SOCAM_DATAWIDTH_10;
|
|
break;
|
|
case 9:
|
|
if (!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_9))
|
|
return -EINVAL;
|
|
*flags |= SOCAM_DATAWIDTH_9;
|
|
break;
|
|
case 8:
|
|
if (!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_8))
|
|
return -EINVAL;
|
|
*flags |= SOCAM_DATAWIDTH_8;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pxa_camera_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct pxa_camera_dev *pcdev = ici->priv;
|
|
unsigned long dw, bpp, bus_flags, camera_flags, common_flags;
|
|
u32 cicr0, cicr1, cicr2, cicr3, cicr4 = 0;
|
|
int ret = test_platform_param(pcdev, icd->buswidth, &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);
|
|
if (!common_flags)
|
|
return -EINVAL;
|
|
|
|
pcdev->channels = 1;
|
|
|
|
/* Make choises, based on platform preferences */
|
|
if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) &&
|
|
(common_flags & SOCAM_HSYNC_ACTIVE_LOW)) {
|
|
if (pcdev->platform_flags & PXA_CAMERA_HSP)
|
|
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 (pcdev->platform_flags & PXA_CAMERA_VSP)
|
|
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 (pcdev->platform_flags & PXA_CAMERA_PCP)
|
|
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)
|
|
return ret;
|
|
|
|
/* Datawidth is now guaranteed to be equal to one of the three values.
|
|
* We fix bit-per-pixel equal to data-width... */
|
|
switch (common_flags & SOCAM_DATAWIDTH_MASK) {
|
|
case SOCAM_DATAWIDTH_10:
|
|
dw = 4;
|
|
bpp = 0x40;
|
|
break;
|
|
case SOCAM_DATAWIDTH_9:
|
|
dw = 3;
|
|
bpp = 0x20;
|
|
break;
|
|
default:
|
|
/* Actually it can only be 8 now,
|
|
* default is just to silence compiler warnings */
|
|
case SOCAM_DATAWIDTH_8:
|
|
dw = 2;
|
|
bpp = 0;
|
|
}
|
|
|
|
if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN)
|
|
cicr4 |= CICR4_PCLK_EN;
|
|
if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
|
|
cicr4 |= CICR4_MCLK_EN;
|
|
if (common_flags & SOCAM_PCLK_SAMPLE_FALLING)
|
|
cicr4 |= CICR4_PCP;
|
|
if (common_flags & SOCAM_HSYNC_ACTIVE_LOW)
|
|
cicr4 |= CICR4_HSP;
|
|
if (common_flags & SOCAM_VSYNC_ACTIVE_LOW)
|
|
cicr4 |= CICR4_VSP;
|
|
|
|
cicr0 = __raw_readl(pcdev->base + CICR0);
|
|
if (cicr0 & CICR0_ENB)
|
|
__raw_writel(cicr0 & ~CICR0_ENB, pcdev->base + CICR0);
|
|
|
|
cicr1 = CICR1_PPL_VAL(icd->width - 1) | bpp | dw;
|
|
|
|
switch (pixfmt) {
|
|
case V4L2_PIX_FMT_YUV422P:
|
|
pcdev->channels = 3;
|
|
cicr1 |= CICR1_YCBCR_F;
|
|
/*
|
|
* Normally, pxa bus wants as input UYVY format. We allow all
|
|
* reorderings of the YUV422 format, as no processing is done,
|
|
* and the YUV stream is just passed through without any
|
|
* transformation. Note that UYVY is the only format that
|
|
* should be used if pxa framebuffer Overlay2 is used.
|
|
*/
|
|
case V4L2_PIX_FMT_UYVY:
|
|
case V4L2_PIX_FMT_VYUY:
|
|
case V4L2_PIX_FMT_YUYV:
|
|
case V4L2_PIX_FMT_YVYU:
|
|
cicr1 |= CICR1_COLOR_SP_VAL(2);
|
|
break;
|
|
case V4L2_PIX_FMT_RGB555:
|
|
cicr1 |= CICR1_RGB_BPP_VAL(1) | CICR1_RGBT_CONV_VAL(2) |
|
|
CICR1_TBIT | CICR1_COLOR_SP_VAL(1);
|
|
break;
|
|
case V4L2_PIX_FMT_RGB565:
|
|
cicr1 |= CICR1_COLOR_SP_VAL(1) | CICR1_RGB_BPP_VAL(2);
|
|
break;
|
|
}
|
|
|
|
cicr2 = 0;
|
|
cicr3 = CICR3_LPF_VAL(icd->height - 1) |
|
|
CICR3_BFW_VAL(min((unsigned short)255, icd->y_skip_top));
|
|
cicr4 |= pcdev->mclk_divisor;
|
|
|
|
__raw_writel(cicr1, pcdev->base + CICR1);
|
|
__raw_writel(cicr2, pcdev->base + CICR2);
|
|
__raw_writel(cicr3, pcdev->base + CICR3);
|
|
__raw_writel(cicr4, pcdev->base + CICR4);
|
|
|
|
/* CIF interrupts are not used, only DMA */
|
|
cicr0 = (cicr0 & CICR0_ENB) | (pcdev->platform_flags & PXA_CAMERA_MASTER ?
|
|
CICR0_SIM_MP : (CICR0_SL_CAP_EN | CICR0_SIM_SP));
|
|
cicr0 |= CICR0_DMAEN | CICR0_IRQ_MASK;
|
|
__raw_writel(cicr0, pcdev->base + CICR0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pxa_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 pxa_camera_dev *pcdev = ici->priv;
|
|
unsigned long bus_flags, camera_flags;
|
|
int ret = test_platform_param(pcdev, buswidth, &bus_flags);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
camera_flags = icd->ops->query_bus_param(icd);
|
|
|
|
return soc_camera_bus_param_compatible(camera_flags, bus_flags) ? 0 : -EINVAL;
|
|
}
|
|
|
|
static const struct soc_camera_data_format pxa_camera_formats[] = {
|
|
{
|
|
.name = "Planar YUV422 16 bit",
|
|
.depth = 16,
|
|
.fourcc = V4L2_PIX_FMT_YUV422P,
|
|
.colorspace = V4L2_COLORSPACE_JPEG,
|
|
},
|
|
};
|
|
|
|
static bool buswidth_supported(struct soc_camera_device *icd, int depth)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct pxa_camera_dev *pcdev = ici->priv;
|
|
|
|
switch (depth) {
|
|
case 8:
|
|
return !!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_8);
|
|
case 9:
|
|
return !!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_9);
|
|
case 10:
|
|
return !!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_10);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static int required_buswidth(const struct soc_camera_data_format *fmt)
|
|
{
|
|
switch (fmt->fourcc) {
|
|
case V4L2_PIX_FMT_UYVY:
|
|
case V4L2_PIX_FMT_VYUY:
|
|
case V4L2_PIX_FMT_YUYV:
|
|
case V4L2_PIX_FMT_YVYU:
|
|
case V4L2_PIX_FMT_RGB565:
|
|
case V4L2_PIX_FMT_RGB555:
|
|
return 8;
|
|
default:
|
|
return fmt->depth;
|
|
}
|
|
}
|
|
|
|
static int pxa_camera_get_formats(struct soc_camera_device *icd, int idx,
|
|
struct soc_camera_format_xlate *xlate)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
int formats = 0, buswidth, ret;
|
|
|
|
buswidth = required_buswidth(icd->formats + idx);
|
|
|
|
if (!buswidth_supported(icd, buswidth))
|
|
return 0;
|
|
|
|
ret = pxa_camera_try_bus_param(icd, buswidth);
|
|
if (ret < 0)
|
|
return 0;
|
|
|
|
switch (icd->formats[idx].fourcc) {
|
|
case V4L2_PIX_FMT_UYVY:
|
|
formats++;
|
|
if (xlate) {
|
|
xlate->host_fmt = &pxa_camera_formats[0];
|
|
xlate->cam_fmt = icd->formats + idx;
|
|
xlate->buswidth = buswidth;
|
|
xlate++;
|
|
dev_dbg(&ici->dev, "Providing format %s using %s\n",
|
|
pxa_camera_formats[0].name,
|
|
icd->formats[idx].name);
|
|
}
|
|
case V4L2_PIX_FMT_VYUY:
|
|
case V4L2_PIX_FMT_YUYV:
|
|
case V4L2_PIX_FMT_YVYU:
|
|
case V4L2_PIX_FMT_RGB565:
|
|
case V4L2_PIX_FMT_RGB555:
|
|
formats++;
|
|
if (xlate) {
|
|
xlate->host_fmt = icd->formats + idx;
|
|
xlate->cam_fmt = icd->formats + idx;
|
|
xlate->buswidth = buswidth;
|
|
xlate++;
|
|
dev_dbg(&ici->dev, "Providing format %s packed\n",
|
|
icd->formats[idx].name);
|
|
}
|
|
break;
|
|
default:
|
|
/* Generic pass-through */
|
|
formats++;
|
|
if (xlate) {
|
|
xlate->host_fmt = icd->formats + idx;
|
|
xlate->cam_fmt = icd->formats + idx;
|
|
xlate->buswidth = icd->formats[idx].depth;
|
|
xlate++;
|
|
dev_dbg(&ici->dev,
|
|
"Providing format %s in pass-through mode\n",
|
|
icd->formats[idx].name);
|
|
}
|
|
}
|
|
|
|
return formats;
|
|
}
|
|
|
|
static int pxa_camera_set_fmt(struct soc_camera_device *icd,
|
|
__u32 pixfmt, struct v4l2_rect *rect)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct pxa_camera_dev *pcdev = ici->priv;
|
|
const struct soc_camera_data_format *host_fmt, *cam_fmt = NULL;
|
|
const struct soc_camera_format_xlate *xlate;
|
|
struct soc_camera_sense sense = {
|
|
.master_clock = pcdev->mclk,
|
|
.pixel_clock_max = pcdev->ciclk / 4,
|
|
};
|
|
int ret, buswidth;
|
|
|
|
xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
|
|
if (!xlate) {
|
|
dev_warn(&ici->dev, "Format %x not found\n", pixfmt);
|
|
return -EINVAL;
|
|
}
|
|
|
|
buswidth = xlate->buswidth;
|
|
host_fmt = xlate->host_fmt;
|
|
cam_fmt = xlate->cam_fmt;
|
|
|
|
/* If PCLK is used to latch data from the sensor, check sense */
|
|
if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN)
|
|
icd->sense = &sense;
|
|
|
|
switch (pixfmt) {
|
|
case 0: /* Only geometry change */
|
|
ret = icd->ops->set_fmt(icd, pixfmt, rect);
|
|
break;
|
|
default:
|
|
ret = icd->ops->set_fmt(icd, cam_fmt->fourcc, rect);
|
|
}
|
|
|
|
icd->sense = NULL;
|
|
|
|
if (ret < 0) {
|
|
dev_warn(&ici->dev, "Failed to configure for format %x\n",
|
|
pixfmt);
|
|
} else if (sense.flags & SOCAM_SENSE_PCLK_CHANGED) {
|
|
if (sense.pixel_clock > sense.pixel_clock_max) {
|
|
dev_err(&ici->dev,
|
|
"pixel clock %lu set by the camera too high!",
|
|
sense.pixel_clock);
|
|
return -EIO;
|
|
}
|
|
recalculate_fifo_timeout(pcdev, sense.pixel_clock);
|
|
}
|
|
|
|
if (pixfmt && !ret) {
|
|
icd->buswidth = buswidth;
|
|
icd->current_fmt = host_fmt;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int pxa_camera_try_fmt(struct soc_camera_device *icd,
|
|
struct v4l2_format *f)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
const struct soc_camera_format_xlate *xlate;
|
|
struct v4l2_pix_format *pix = &f->fmt.pix;
|
|
__u32 pixfmt = pix->pixelformat;
|
|
enum v4l2_field field;
|
|
int ret;
|
|
|
|
xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
|
|
if (!xlate) {
|
|
dev_warn(&ici->dev, "Format %x not found\n", pixfmt);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* limit to pxa hardware capabilities */
|
|
if (pix->height < 32)
|
|
pix->height = 32;
|
|
if (pix->height > 2048)
|
|
pix->height = 2048;
|
|
if (pix->width < 48)
|
|
pix->width = 48;
|
|
if (pix->width > 2048)
|
|
pix->width = 2048;
|
|
pix->width &= ~0x01;
|
|
|
|
pix->bytesperline = pix->width *
|
|
DIV_ROUND_UP(xlate->host_fmt->depth, 8);
|
|
pix->sizeimage = pix->height * pix->bytesperline;
|
|
|
|
/* camera has to see its format, but the user the original one */
|
|
pix->pixelformat = xlate->cam_fmt->fourcc;
|
|
/* limit to sensor capabilities */
|
|
ret = icd->ops->try_fmt(icd, f);
|
|
pix->pixelformat = xlate->host_fmt->fourcc;
|
|
|
|
field = pix->field;
|
|
|
|
if (field == V4L2_FIELD_ANY) {
|
|
pix->field = V4L2_FIELD_NONE;
|
|
} else if (field != V4L2_FIELD_NONE) {
|
|
dev_err(&icd->dev, "Field type %d unsupported.\n", field);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int pxa_camera_reqbufs(struct soc_camera_file *icf,
|
|
struct v4l2_requestbuffers *p)
|
|
{
|
|
int i;
|
|
|
|
/* This is for locking debugging only. I removed spinlocks and now I
|
|
* check whether .prepare is ever called on a linked buffer, or whether
|
|
* a dma IRQ can occur for an in-work or unlinked buffer. Until now
|
|
* it hadn't triggered */
|
|
for (i = 0; i < p->count; i++) {
|
|
struct pxa_buffer *buf = container_of(icf->vb_vidq.bufs[i],
|
|
struct pxa_buffer, vb);
|
|
buf->inwork = 0;
|
|
INIT_LIST_HEAD(&buf->vb.queue);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static unsigned int pxa_camera_poll(struct file *file, poll_table *pt)
|
|
{
|
|
struct soc_camera_file *icf = file->private_data;
|
|
struct pxa_buffer *buf;
|
|
|
|
buf = list_entry(icf->vb_vidq.stream.next, struct pxa_buffer,
|
|
vb.stream);
|
|
|
|
poll_wait(file, &buf->vb.done, pt);
|
|
|
|
if (buf->vb.state == VIDEOBUF_DONE ||
|
|
buf->vb.state == VIDEOBUF_ERROR)
|
|
return POLLIN|POLLRDNORM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pxa_camera_querycap(struct soc_camera_host *ici,
|
|
struct v4l2_capability *cap)
|
|
{
|
|
/* cap->name is set by the firendly caller:-> */
|
|
strlcpy(cap->card, pxa_cam_driver_description, sizeof(cap->card));
|
|
cap->version = PXA_CAM_VERSION_CODE;
|
|
cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pxa_camera_suspend(struct soc_camera_device *icd, pm_message_t state)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct pxa_camera_dev *pcdev = ici->priv;
|
|
int i = 0, ret = 0;
|
|
|
|
pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR0);
|
|
pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR1);
|
|
pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR2);
|
|
pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR3);
|
|
pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR4);
|
|
|
|
if ((pcdev->icd) && (pcdev->icd->ops->suspend))
|
|
ret = pcdev->icd->ops->suspend(pcdev->icd, state);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int pxa_camera_resume(struct soc_camera_device *icd)
|
|
{
|
|
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
|
|
struct pxa_camera_dev *pcdev = ici->priv;
|
|
int i = 0, ret = 0;
|
|
|
|
DRCMR(68) = pcdev->dma_chans[0] | DRCMR_MAPVLD;
|
|
DRCMR(69) = pcdev->dma_chans[1] | DRCMR_MAPVLD;
|
|
DRCMR(70) = pcdev->dma_chans[2] | DRCMR_MAPVLD;
|
|
|
|
__raw_writel(pcdev->save_cicr[i++] & ~CICR0_ENB, pcdev->base + CICR0);
|
|
__raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR1);
|
|
__raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR2);
|
|
__raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR3);
|
|
__raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR4);
|
|
|
|
if ((pcdev->icd) && (pcdev->icd->ops->resume))
|
|
ret = pcdev->icd->ops->resume(pcdev->icd);
|
|
|
|
/* Restart frame capture if active buffer exists */
|
|
if (!ret && pcdev->active) {
|
|
unsigned long cifr, cicr0;
|
|
|
|
/* Reset the FIFOs */
|
|
cifr = __raw_readl(pcdev->base + CIFR) | CIFR_RESET_F;
|
|
__raw_writel(cifr, pcdev->base + CIFR);
|
|
|
|
cicr0 = __raw_readl(pcdev->base + CICR0);
|
|
cicr0 &= ~CICR0_EOFM; /* Enable End-Of-Frame Interrupt */
|
|
cicr0 |= CICR0_ENB; /* Restart the Capture Interface */
|
|
__raw_writel(cicr0, pcdev->base + CICR0);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct soc_camera_host_ops pxa_soc_camera_host_ops = {
|
|
.owner = THIS_MODULE,
|
|
.add = pxa_camera_add_device,
|
|
.remove = pxa_camera_remove_device,
|
|
.suspend = pxa_camera_suspend,
|
|
.resume = pxa_camera_resume,
|
|
.get_formats = pxa_camera_get_formats,
|
|
.set_fmt = pxa_camera_set_fmt,
|
|
.try_fmt = pxa_camera_try_fmt,
|
|
.init_videobuf = pxa_camera_init_videobuf,
|
|
.reqbufs = pxa_camera_reqbufs,
|
|
.poll = pxa_camera_poll,
|
|
.querycap = pxa_camera_querycap,
|
|
.set_bus_param = pxa_camera_set_bus_param,
|
|
};
|
|
|
|
/* Should be allocated dynamically too, but we have only one. */
|
|
static struct soc_camera_host pxa_soc_camera_host = {
|
|
.drv_name = PXA_CAM_DRV_NAME,
|
|
.ops = &pxa_soc_camera_host_ops,
|
|
};
|
|
|
|
static int pxa_camera_probe(struct platform_device *pdev)
|
|
{
|
|
struct pxa_camera_dev *pcdev;
|
|
struct resource *res;
|
|
void __iomem *base;
|
|
int irq;
|
|
int err = 0;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (!res || irq < 0) {
|
|
err = -ENODEV;
|
|
goto exit;
|
|
}
|
|
|
|
pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
|
|
if (!pcdev) {
|
|
dev_err(&pdev->dev, "Could not allocate pcdev\n");
|
|
err = -ENOMEM;
|
|
goto exit;
|
|
}
|
|
|
|
pcdev->clk = clk_get(&pdev->dev, NULL);
|
|
if (IS_ERR(pcdev->clk)) {
|
|
err = PTR_ERR(pcdev->clk);
|
|
goto exit_kfree;
|
|
}
|
|
|
|
dev_set_drvdata(&pdev->dev, pcdev);
|
|
pcdev->res = res;
|
|
|
|
pcdev->pdata = pdev->dev.platform_data;
|
|
pcdev->platform_flags = pcdev->pdata->flags;
|
|
if (!(pcdev->platform_flags & (PXA_CAMERA_DATAWIDTH_8 |
|
|
PXA_CAMERA_DATAWIDTH_9 | PXA_CAMERA_DATAWIDTH_10))) {
|
|
/* Platform hasn't set available data widths. This is bad.
|
|
* Warn and use a default. */
|
|
dev_warn(&pdev->dev, "WARNING! Platform hasn't set available "
|
|
"data widths, using default 10 bit\n");
|
|
pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_10;
|
|
}
|
|
pcdev->mclk = pcdev->pdata->mclk_10khz * 10000;
|
|
if (!pcdev->mclk) {
|
|
dev_warn(&pdev->dev,
|
|
"mclk == 0! Please, fix your platform data. "
|
|
"Using default 20MHz\n");
|
|
pcdev->mclk = 20000000;
|
|
}
|
|
|
|
pcdev->dev = &pdev->dev;
|
|
pcdev->mclk_divisor = mclk_get_divisor(pcdev);
|
|
|
|
INIT_LIST_HEAD(&pcdev->capture);
|
|
spin_lock_init(&pcdev->lock);
|
|
|
|
/*
|
|
* Request the regions.
|
|
*/
|
|
if (!request_mem_region(res->start, res->end - res->start + 1,
|
|
PXA_CAM_DRV_NAME)) {
|
|
err = -EBUSY;
|
|
goto exit_clk;
|
|
}
|
|
|
|
base = ioremap(res->start, res->end - res->start + 1);
|
|
if (!base) {
|
|
err = -ENOMEM;
|
|
goto exit_release;
|
|
}
|
|
pcdev->irq = irq;
|
|
pcdev->base = base;
|
|
|
|
/* request dma */
|
|
err = pxa_request_dma("CI_Y", DMA_PRIO_HIGH,
|
|
pxa_camera_dma_irq_y, pcdev);
|
|
if (err < 0) {
|
|
dev_err(pcdev->dev, "Can't request DMA for Y\n");
|
|
goto exit_iounmap;
|
|
}
|
|
pcdev->dma_chans[0] = err;
|
|
dev_dbg(pcdev->dev, "got DMA channel %d\n", pcdev->dma_chans[0]);
|
|
|
|
err = pxa_request_dma("CI_U", DMA_PRIO_HIGH,
|
|
pxa_camera_dma_irq_u, pcdev);
|
|
if (err < 0) {
|
|
dev_err(pcdev->dev, "Can't request DMA for U\n");
|
|
goto exit_free_dma_y;
|
|
}
|
|
pcdev->dma_chans[1] = err;
|
|
dev_dbg(pcdev->dev, "got DMA channel (U) %d\n", pcdev->dma_chans[1]);
|
|
|
|
err = pxa_request_dma("CI_V", DMA_PRIO_HIGH,
|
|
pxa_camera_dma_irq_v, pcdev);
|
|
if (err < 0) {
|
|
dev_err(pcdev->dev, "Can't request DMA for V\n");
|
|
goto exit_free_dma_u;
|
|
}
|
|
pcdev->dma_chans[2] = err;
|
|
dev_dbg(pcdev->dev, "got DMA channel (V) %d\n", pcdev->dma_chans[2]);
|
|
|
|
DRCMR(68) = pcdev->dma_chans[0] | DRCMR_MAPVLD;
|
|
DRCMR(69) = pcdev->dma_chans[1] | DRCMR_MAPVLD;
|
|
DRCMR(70) = pcdev->dma_chans[2] | DRCMR_MAPVLD;
|
|
|
|
/* request irq */
|
|
err = request_irq(pcdev->irq, pxa_camera_irq, 0, PXA_CAM_DRV_NAME,
|
|
pcdev);
|
|
if (err) {
|
|
dev_err(pcdev->dev, "Camera interrupt register failed \n");
|
|
goto exit_free_dma;
|
|
}
|
|
|
|
pxa_soc_camera_host.priv = pcdev;
|
|
pxa_soc_camera_host.dev.parent = &pdev->dev;
|
|
pxa_soc_camera_host.nr = pdev->id;
|
|
err = soc_camera_host_register(&pxa_soc_camera_host);
|
|
if (err)
|
|
goto exit_free_irq;
|
|
|
|
return 0;
|
|
|
|
exit_free_irq:
|
|
free_irq(pcdev->irq, pcdev);
|
|
exit_free_dma:
|
|
pxa_free_dma(pcdev->dma_chans[2]);
|
|
exit_free_dma_u:
|
|
pxa_free_dma(pcdev->dma_chans[1]);
|
|
exit_free_dma_y:
|
|
pxa_free_dma(pcdev->dma_chans[0]);
|
|
exit_iounmap:
|
|
iounmap(base);
|
|
exit_release:
|
|
release_mem_region(res->start, res->end - res->start + 1);
|
|
exit_clk:
|
|
clk_put(pcdev->clk);
|
|
exit_kfree:
|
|
kfree(pcdev);
|
|
exit:
|
|
return err;
|
|
}
|
|
|
|
static int __devexit pxa_camera_remove(struct platform_device *pdev)
|
|
{
|
|
struct pxa_camera_dev *pcdev = platform_get_drvdata(pdev);
|
|
struct resource *res;
|
|
|
|
clk_put(pcdev->clk);
|
|
|
|
pxa_free_dma(pcdev->dma_chans[0]);
|
|
pxa_free_dma(pcdev->dma_chans[1]);
|
|
pxa_free_dma(pcdev->dma_chans[2]);
|
|
free_irq(pcdev->irq, pcdev);
|
|
|
|
soc_camera_host_unregister(&pxa_soc_camera_host);
|
|
|
|
iounmap(pcdev->base);
|
|
|
|
res = pcdev->res;
|
|
release_mem_region(res->start, res->end - res->start + 1);
|
|
|
|
kfree(pcdev);
|
|
|
|
dev_info(&pdev->dev, "PXA Camera driver unloaded\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver pxa_camera_driver = {
|
|
.driver = {
|
|
.name = PXA_CAM_DRV_NAME,
|
|
},
|
|
.probe = pxa_camera_probe,
|
|
.remove = __exit_p(pxa_camera_remove),
|
|
};
|
|
|
|
|
|
static int __devinit pxa_camera_init(void)
|
|
{
|
|
return platform_driver_register(&pxa_camera_driver);
|
|
}
|
|
|
|
static void __exit pxa_camera_exit(void)
|
|
{
|
|
platform_driver_unregister(&pxa_camera_driver);
|
|
}
|
|
|
|
module_init(pxa_camera_init);
|
|
module_exit(pxa_camera_exit);
|
|
|
|
MODULE_DESCRIPTION("PXA27x SoC Camera Host driver");
|
|
MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
|
|
MODULE_LICENSE("GPL");
|