diff options
Diffstat (limited to 'drivers/media/video/mx2_camera.c')
| -rw-r--r-- | drivers/media/video/mx2_camera.c | 1884 |
1 files changed, 0 insertions, 1884 deletions
diff --git a/drivers/media/video/mx2_camera.c b/drivers/media/video/mx2_camera.c deleted file mode 100644 index 965427f279a5..000000000000 --- a/drivers/media/video/mx2_camera.c +++ /dev/null @@ -1,1884 +0,0 @@ -/* - * V4L2 Driver for i.MX27/i.MX25 camera host - * - * Copyright (C) 2008, Sascha Hauer, Pengutronix - * Copyright (C) 2010, Baruch Siach, Orex Computed Radiography - * Copyright (C) 2012, Javier Martin, Vista Silicon S.L. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/io.h> -#include <linux/delay.h> -#include <linux/slab.h> -#include <linux/dma-mapping.h> -#include <linux/errno.h> -#include <linux/fs.h> -#include <linux/gcd.h> -#include <linux/interrupt.h> -#include <linux/kernel.h> -#include <linux/math64.h> -#include <linux/mm.h> -#include <linux/moduleparam.h> -#include <linux/time.h> -#include <linux/device.h> -#include <linux/platform_device.h> -#include <linux/mutex.h> -#include <linux/clk.h> - -#include <media/v4l2-common.h> -#include <media/v4l2-dev.h> -#include <media/videobuf2-core.h> -#include <media/videobuf2-dma-contig.h> -#include <media/soc_camera.h> -#include <media/soc_mediabus.h> - -#include <linux/videodev2.h> - -#include <linux/platform_data/camera-mx2.h> -#include <mach/hardware.h> - -#include <asm/dma.h> - -#define MX2_CAM_DRV_NAME "mx2-camera" -#define MX2_CAM_VERSION "0.0.6" -#define MX2_CAM_DRIVER_DESCRIPTION "i.MX2x_Camera" - -/* reset values */ -#define CSICR1_RESET_VAL 0x40000800 -#define CSICR2_RESET_VAL 0x0 -#define CSICR3_RESET_VAL 0x0 - -/* csi control reg 1 */ -#define CSICR1_SWAP16_EN (1 << 31) -#define CSICR1_EXT_VSYNC (1 << 30) -#define CSICR1_EOF_INTEN (1 << 29) -#define CSICR1_PRP_IF_EN (1 << 28) -#define CSICR1_CCIR_MODE (1 << 27) -#define CSICR1_COF_INTEN (1 << 26) -#define CSICR1_SF_OR_INTEN (1 << 25) -#define CSICR1_RF_OR_INTEN (1 << 24) -#define CSICR1_STATFF_LEVEL (3 << 22) -#define CSICR1_STATFF_INTEN (1 << 21) -#define CSICR1_RXFF_LEVEL(l) (((l) & 3) << 19) /* MX27 */ -#define CSICR1_FB2_DMA_INTEN (1 << 20) /* MX25 */ -#define CSICR1_FB1_DMA_INTEN (1 << 19) /* MX25 */ -#define CSICR1_RXFF_INTEN (1 << 18) -#define CSICR1_SOF_POL (1 << 17) -#define CSICR1_SOF_INTEN (1 << 16) -#define CSICR1_MCLKDIV(d) (((d) & 0xF) << 12) -#define CSICR1_HSYNC_POL (1 << 11) -#define CSICR1_CCIR_EN (1 << 10) -#define CSICR1_MCLKEN (1 << 9) -#define CSICR1_FCC (1 << 8) -#define CSICR1_PACK_DIR (1 << 7) -#define CSICR1_CLR_STATFIFO (1 << 6) -#define CSICR1_CLR_RXFIFO (1 << 5) -#define CSICR1_GCLK_MODE (1 << 4) -#define CSICR1_INV_DATA (1 << 3) -#define CSICR1_INV_PCLK (1 << 2) -#define CSICR1_REDGE (1 << 1) -#define CSICR1_FMT_MASK (CSICR1_PACK_DIR | CSICR1_SWAP16_EN) - -#define SHIFT_STATFF_LEVEL 22 -#define SHIFT_RXFF_LEVEL 19 -#define SHIFT_MCLKDIV 12 - -/* control reg 3 */ -#define CSICR3_FRMCNT (0xFFFF << 16) -#define CSICR3_FRMCNT_RST (1 << 15) -#define CSICR3_DMA_REFLASH_RFF (1 << 14) -#define CSICR3_DMA_REFLASH_SFF (1 << 13) -#define CSICR3_DMA_REQ_EN_RFF (1 << 12) -#define CSICR3_DMA_REQ_EN_SFF (1 << 11) -#define CSICR3_RXFF_LEVEL(l) (((l) & 7) << 4) /* MX25 */ -#define CSICR3_CSI_SUP (1 << 3) -#define CSICR3_ZERO_PACK_EN (1 << 2) -#define CSICR3_ECC_INT_EN (1 << 1) -#define CSICR3_ECC_AUTO_EN (1 << 0) - -#define SHIFT_FRMCNT 16 - -/* csi status reg */ -#define CSISR_SFF_OR_INT (1 << 25) -#define CSISR_RFF_OR_INT (1 << 24) -#define CSISR_STATFF_INT (1 << 21) -#define CSISR_DMA_TSF_FB2_INT (1 << 20) /* MX25 */ -#define CSISR_DMA_TSF_FB1_INT (1 << 19) /* MX25 */ -#define CSISR_RXFF_INT (1 << 18) -#define CSISR_EOF_INT (1 << 17) -#define CSISR_SOF_INT (1 << 16) -#define CSISR_F2_INT (1 << 15) -#define CSISR_F1_INT (1 << 14) -#define CSISR_COF_INT (1 << 13) -#define CSISR_ECC_INT (1 << 1) -#define CSISR_DRDY (1 << 0) - -#define CSICR1 0x00 -#define CSICR2 0x04 -#define CSISR (cpu_is_mx27() ? 0x08 : 0x18) -#define CSISTATFIFO 0x0c -#define CSIRFIFO 0x10 -#define CSIRXCNT 0x14 -#define CSICR3 (cpu_is_mx27() ? 0x1C : 0x08) -#define CSIDMASA_STATFIFO 0x20 -#define CSIDMATA_STATFIFO 0x24 -#define CSIDMASA_FB1 0x28 -#define CSIDMASA_FB2 0x2c -#define CSIFBUF_PARA 0x30 -#define CSIIMAG_PARA 0x34 - -/* EMMA PrP */ -#define PRP_CNTL 0x00 -#define PRP_INTR_CNTL 0x04 -#define PRP_INTRSTATUS 0x08 -#define PRP_SOURCE_Y_PTR 0x0c -#define PRP_SOURCE_CB_PTR 0x10 -#define PRP_SOURCE_CR_PTR 0x14 -#define PRP_DEST_RGB1_PTR 0x18 -#define PRP_DEST_RGB2_PTR 0x1c -#define PRP_DEST_Y_PTR 0x20 -#define PRP_DEST_CB_PTR 0x24 -#define PRP_DEST_CR_PTR 0x28 -#define PRP_SRC_FRAME_SIZE 0x2c -#define PRP_DEST_CH1_LINE_STRIDE 0x30 -#define PRP_SRC_PIXEL_FORMAT_CNTL 0x34 -#define PRP_CH1_PIXEL_FORMAT_CNTL 0x38 -#define PRP_CH1_OUT_IMAGE_SIZE 0x3c -#define PRP_CH2_OUT_IMAGE_SIZE 0x40 -#define PRP_SRC_LINE_STRIDE 0x44 -#define PRP_CSC_COEF_012 0x48 -#define PRP_CSC_COEF_345 0x4c -#define PRP_CSC_COEF_678 0x50 -#define PRP_CH1_RZ_HORI_COEF1 0x54 -#define PRP_CH1_RZ_HORI_COEF2 0x58 -#define PRP_CH1_RZ_HORI_VALID 0x5c -#define PRP_CH1_RZ_VERT_COEF1 0x60 -#define PRP_CH1_RZ_VERT_COEF2 0x64 -#define PRP_CH1_RZ_VERT_VALID 0x68 -#define PRP_CH2_RZ_HORI_COEF1 0x6c -#define PRP_CH2_RZ_HORI_COEF2 0x70 -#define PRP_CH2_RZ_HORI_VALID 0x74 -#define PRP_CH2_RZ_VERT_COEF1 0x78 -#define PRP_CH2_RZ_VERT_COEF2 0x7c -#define PRP_CH2_RZ_VERT_VALID 0x80 - -#define PRP_CNTL_CH1EN (1 << 0) -#define PRP_CNTL_CH2EN (1 << 1) -#define PRP_CNTL_CSIEN (1 << 2) -#define PRP_CNTL_DATA_IN_YUV420 (0 << 3) -#define PRP_CNTL_DATA_IN_YUV422 (1 << 3) -#define PRP_CNTL_DATA_IN_RGB16 (2 << 3) -#define PRP_CNTL_DATA_IN_RGB32 (3 << 3) -#define PRP_CNTL_CH1_OUT_RGB8 (0 << 5) -#define PRP_CNTL_CH1_OUT_RGB16 (1 << 5) -#define PRP_CNTL_CH1_OUT_RGB32 (2 << 5) -#define PRP_CNTL_CH1_OUT_YUV422 (3 << 5) -#define PRP_CNTL_CH2_OUT_YUV420 (0 << 7) -#define PRP_CNTL_CH2_OUT_YUV422 (1 << 7) -#define PRP_CNTL_CH2_OUT_YUV444 (2 << 7) -#define PRP_CNTL_CH1_LEN (1 << 9) -#define PRP_CNTL_CH2_LEN (1 << 10) -#define PRP_CNTL_SKIP_FRAME (1 << 11) -#define PRP_CNTL_SWRST (1 << 12) -#define PRP_CNTL_CLKEN (1 << 13) -#define PRP_CNTL_WEN (1 << 14) -#define PRP_CNTL_CH1BYP (1 << 15) -#define PRP_CNTL_IN_TSKIP(x) ((x) << 16) -#define PRP_CNTL_CH1_TSKIP(x) ((x) << 19) -#define PRP_CNTL_CH2_TSKIP(x) ((x) << 22) -#define PRP_CNTL_INPUT_FIFO_LEVEL(x) ((x) << 25) -#define PRP_CNTL_RZ_FIFO_LEVEL(x) ((x) << 27) -#define PRP_CNTL_CH2B1EN (1 << 29) -#define PRP_CNTL_CH2B2EN (1 << 30) -#define PRP_CNTL_CH2FEN (1 << 31) - -/* IRQ Enable and status register */ -#define PRP_INTR_RDERR (1 << 0) -#define PRP_INTR_CH1WERR (1 << 1) -#define PRP_INTR_CH2WERR (1 << 2) -#define PRP_INTR_CH1FC (1 << 3) -#define PRP_INTR_CH2FC (1 << 5) -#define PRP_INTR_LBOVF (1 << 7) -#define PRP_INTR_CH2OVF (1 << 8) - -/* Resizing registers */ -#define PRP_RZ_VALID_TBL_LEN(x) ((x) << 24) -#define PRP_RZ_VALID_BILINEAR (1 << 31) - -#define MAX_VIDEO_MEM 16 - -#define RESIZE_NUM_MIN 1 -#define RESIZE_NUM_MAX 20 -#define BC_COEF 3 -#define SZ_COEF (1 << BC_COEF) - -#define RESIZE_DIR_H 0 -#define RESIZE_DIR_V 1 - -#define RESIZE_ALGO_BILINEAR 0 -#define RESIZE_ALGO_AVERAGING 1 - -struct mx2_prp_cfg { - int channel; - u32 in_fmt; - u32 out_fmt; - u32 src_pixel; - u32 ch1_pixel; - u32 irq_flags; - u32 csicr1; -}; - -/* prp resizing parameters */ -struct emma_prp_resize { - int algo; /* type of algorithm used */ - int len; /* number of coefficients */ - unsigned char s[RESIZE_NUM_MAX]; /* table of coefficients */ -}; - -/* prp configuration for a client-host fmt pair */ -struct mx2_fmt_cfg { - enum v4l2_mbus_pixelcode in_fmt; - u32 out_fmt; - struct mx2_prp_cfg cfg; -}; - -enum mx2_buffer_state { - MX2_STATE_QUEUED, - MX2_STATE_ACTIVE, - MX2_STATE_DONE, -}; - -struct mx2_buf_internal { - struct list_head queue; - int bufnum; - bool discard; -}; - -/* buffer for one video frame */ -struct mx2_buffer { - /* common v4l buffer stuff -- must be first */ - struct vb2_buffer vb; - enum mx2_buffer_state state; - struct mx2_buf_internal internal; -}; - -struct mx2_camera_dev { - struct device *dev; - struct soc_camera_host soc_host; - struct soc_camera_device *icd; - struct clk *clk_csi, *clk_emma_ahb, *clk_emma_ipg; - - unsigned int irq_csi, irq_emma; - void __iomem *base_csi, *base_emma; - unsigned long base_dma; - - struct mx2_camera_platform_data *pdata; - struct resource *res_csi, *res_emma; - unsigned long platform_flags; - - struct list_head capture; - struct list_head active_bufs; - struct list_head discard; - - spinlock_t lock; - - int dma; - struct mx2_buffer *active; - struct mx2_buffer *fb1_active; - struct mx2_buffer *fb2_active; - - u32 csicr1; - - struct mx2_buf_internal buf_discard[2]; - void *discard_buffer; - dma_addr_t discard_buffer_dma; - size_t discard_size; - struct mx2_fmt_cfg *emma_prp; - struct emma_prp_resize resizing[2]; - unsigned int s_width, s_height; - u32 frame_count; - struct vb2_alloc_ctx *alloc_ctx; -}; - -static struct mx2_buffer *mx2_ibuf_to_buf(struct mx2_buf_internal *int_buf) -{ - return container_of(int_buf, struct mx2_buffer, internal); -} - -static struct mx2_fmt_cfg mx27_emma_prp_table[] = { - /* - * This is a generic configuration which is valid for most - * prp input-output format combinations. - * We set the incomming and outgoing pixelformat to a - * 16 Bit wide format and adjust the bytesperline - * accordingly. With this configuration the inputdata - * will not be changed by the emma and could be any type - * of 16 Bit Pixelformat. - */ - { - .in_fmt = 0, - .out_fmt = 0, - .cfg = { - .channel = 1, - .in_fmt = PRP_CNTL_DATA_IN_RGB16, - .out_fmt = PRP_CNTL_CH1_OUT_RGB16, - .src_pixel = 0x2ca00565, /* RGB565 */ - .ch1_pixel = 0x2ca00565, /* RGB565 */ - .irq_flags = PRP_INTR_RDERR | PRP_INTR_CH1WERR | - PRP_INTR_CH1FC | PRP_INTR_LBOVF, - .csicr1 = 0, - } - }, - { - .in_fmt = V4L2_MBUS_FMT_YUYV8_2X8, - .out_fmt = V4L2_PIX_FMT_YUV420, - .cfg = { - .channel = 2, - .in_fmt = PRP_CNTL_DATA_IN_YUV422, - .out_fmt = PRP_CNTL_CH2_OUT_YUV420, - .src_pixel = 0x22000888, /* YUV422 (YUYV) */ - .irq_flags = PRP_INTR_RDERR | PRP_INTR_CH2WERR | - PRP_INTR_CH2FC | PRP_INTR_LBOVF | - PRP_INTR_CH2OVF, - .csicr1 = CSICR1_PACK_DIR, - } - }, - { - .in_fmt = V4L2_MBUS_FMT_UYVY8_2X8, - .out_fmt = V4L2_PIX_FMT_YUV420, - .cfg = { - .channel = 2, - .in_fmt = PRP_CNTL_DATA_IN_YUV422, - .out_fmt = PRP_CNTL_CH2_OUT_YUV420, - .src_pixel = 0x22000888, /* YUV422 (YUYV) */ - .irq_flags = PRP_INTR_RDERR | PRP_INTR_CH2WERR | - PRP_INTR_CH2FC | PRP_INTR_LBOVF | - PRP_INTR_CH2OVF, - .csicr1 = CSICR1_SWAP16_EN, - } - }, -}; - -static struct mx2_fmt_cfg *mx27_emma_prp_get_format( - enum v4l2_mbus_pixelcode in_fmt, - u32 out_fmt) -{ - int i; - - for (i = 1; i < ARRAY_SIZE(mx27_emma_prp_table); i++) - if ((mx27_emma_prp_table[i].in_fmt == in_fmt) && - (mx27_emma_prp_table[i].out_fmt == out_fmt)) { - return &mx27_emma_prp_table[i]; - } - /* If no match return the most generic configuration */ - return &mx27_emma_prp_table[0]; -}; - -static void mx27_update_emma_buf(struct mx2_camera_dev *pcdev, - unsigned long phys, int bufnum) -{ - struct mx2_fmt_cfg *prp = pcdev->emma_prp; - - if (prp->cfg.channel == 1) { - writel(phys, pcdev->base_emma + - PRP_DEST_RGB1_PTR + 4 * bufnum); - } else { - writel(phys, pcdev->base_emma + - PRP_DEST_Y_PTR - 0x14 * bufnum); - if (prp->out_fmt == V4L2_PIX_FMT_YUV420) { - u32 imgsize = pcdev->icd->user_height * - pcdev->icd->user_width; - - writel(phys + imgsize, pcdev->base_emma + - PRP_DEST_CB_PTR - 0x14 * bufnum); - writel(phys + ((5 * imgsize) / 4), pcdev->base_emma + - PRP_DEST_CR_PTR - 0x14 * bufnum); - } - } -} - -static void mx2_camera_deactivate(struct mx2_camera_dev *pcdev) -{ - unsigned long flags; - - clk_disable_unprepare(pcdev->clk_csi); - writel(0, pcdev->base_csi + CSICR1); - if (cpu_is_mx27()) { - writel(0, pcdev->base_emma + PRP_CNTL); - } else if (cpu_is_mx25()) { - spin_lock_irqsave(&pcdev->lock, flags); - pcdev->fb1_active = NULL; - pcdev->fb2_active = NULL; - writel(0, pcdev->base_csi + CSIDMASA_FB1); - writel(0, pcdev->base_csi + CSIDMASA_FB2); - spin_unlock_irqrestore(&pcdev->lock, flags); - } -} - -/* - * The following two functions absolutely depend on the fact, that - * there can be only one camera on mx2 camera sensor interface - */ -static int mx2_camera_add_device(struct soc_camera_device *icd) -{ - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct mx2_camera_dev *pcdev = ici->priv; - int ret; - u32 csicr1; - - if (pcdev->icd) - return -EBUSY; - - ret = clk_prepare_enable(pcdev->clk_csi); - if (ret < 0) - return ret; - - csicr1 = CSICR1_MCLKEN; - - if (cpu_is_mx27()) { - csicr1 |= CSICR1_PRP_IF_EN | CSICR1_FCC | - CSICR1_RXFF_LEVEL(0); - } else if (cpu_is_mx27()) - csicr1 |= CSICR1_SOF_INTEN | CSICR1_RXFF_LEVEL(2); - - pcdev->csicr1 = csicr1; - writel(pcdev->csicr1, pcdev->base_csi + CSICR1); - - pcdev->icd = icd; - pcdev->frame_count = 0; - - dev_info(icd->parent, "Camera driver attached to camera %d\n", - icd->devnum); - - return 0; -} - -static void mx2_camera_remove_device(struct soc_camera_device *icd) -{ - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct mx2_camera_dev *pcdev = ici->priv; - - BUG_ON(icd != pcdev->icd); - - dev_info(icd->parent, "Camera driver detached from camera %d\n", - icd->devnum); - - mx2_camera_deactivate(pcdev); - - pcdev->icd = NULL; -} - -static void mx25_camera_frame_done(struct mx2_camera_dev *pcdev, int fb, - int state) -{ - struct vb2_buffer *vb; - struct mx2_buffer *buf; - struct mx2_buffer **fb_active = fb == 1 ? &pcdev->fb1_active : - &pcdev->fb2_active; - u32 fb_reg = fb == 1 ? CSIDMASA_FB1 : CSIDMASA_FB2; - unsigned long flags; - - spin_lock_irqsave(&pcdev->lock, flags); - - if (*fb_active == NULL) - goto out; - - vb = &(*fb_active)->vb; - dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%p %lu\n", __func__, - vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0)); - - do_gettimeofday(&vb->v4l2_buf.timestamp); - vb->v4l2_buf.sequence++; - vb2_buffer_done(vb, VB2_BUF_STATE_DONE); - - if (list_empty(&pcdev->capture)) { - buf = NULL; - writel(0, pcdev->base_csi + fb_reg); - } else { - buf = list_first_entry(&pcdev->capture, struct mx2_buffer, - internal.queue); - vb = &buf->vb; - list_del(&buf->internal.queue); - buf->state = MX2_STATE_ACTIVE; - writel(vb2_dma_contig_plane_dma_addr(vb, 0), - pcdev->base_csi + fb_reg); - } - - *fb_active = buf; - -out: - spin_unlock_irqrestore(&pcdev->lock, flags); -} - -static irqreturn_t mx25_camera_irq(int irq_csi, void *data) -{ - struct mx2_camera_dev *pcdev = data; - u32 status = readl(pcdev->base_csi + CSISR); - - if (status & CSISR_DMA_TSF_FB1_INT) - mx25_camera_frame_done(pcdev, 1, MX2_STATE_DONE); - else if (status & CSISR_DMA_TSF_FB2_INT) - mx25_camera_frame_done(pcdev, 2, MX2_STATE_DONE); - - /* FIXME: handle CSISR_RFF_OR_INT */ - - writel(status, pcdev->base_csi + CSISR); - - return IRQ_HANDLED; -} - -/* - * Videobuf operations - */ -static int mx2_videobuf_setup(struct vb2_queue *vq, - const struct v4l2_format *fmt, - unsigned int *count, unsigned int *num_planes, - unsigned int sizes[], void *alloc_ctxs[]) -{ - struct soc_camera_device *icd = soc_camera_from_vb2q(vq); - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct mx2_camera_dev *pcdev = ici->priv; - - dev_dbg(icd->parent, "count=%d, size=%d\n", *count, sizes[0]); - - /* TODO: support for VIDIOC_CREATE_BUFS not ready */ - if (fmt != NULL) - return -ENOTTY; - - alloc_ctxs[0] = pcdev->alloc_ctx; - - sizes[0] = icd->sizeimage; - - if (0 == *count) - *count = 32; - if (!*num_planes && - sizes[0] * *count > MAX_VIDEO_MEM * 1024 * 1024) - *count = (MAX_VIDEO_MEM * 1024 * 1024) / sizes[0]; - - *num_planes = 1; - - return 0; -} - -static int mx2_videobuf_prepare(struct vb2_buffer *vb) -{ - struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue); - int ret = 0; - - dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__, - vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0)); - -#ifdef DEBUG - /* - * This can be useful if you want to see if we actually fill - * the buffer with something - */ - memset((void *)vb2_plane_vaddr(vb, 0), - 0xaa, vb2_get_plane_payload(vb, 0)); -#endif - - vb2_set_plane_payload(vb, 0, icd->sizeimage); - if (vb2_plane_vaddr(vb, 0) && - vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0)) { - ret = -EINVAL; - goto out; - } - - return 0; - -out: - return ret; -} - -static void mx2_videobuf_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->parent); - struct mx2_camera_dev *pcdev = ici->priv; - struct mx2_buffer *buf = container_of(vb, struct mx2_buffer, vb); - unsigned long flags; - - dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__, - vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0)); - - spin_lock_irqsave(&pcdev->lock, flags); - - buf->state = MX2_STATE_QUEUED; - list_add_tail(&buf->internal.queue, &pcdev->capture); - - if (cpu_is_mx25()) { - u32 csicr3, dma_inten = 0; - - if (pcdev->fb1_active == NULL) { - writel(vb2_dma_contig_plane_dma_addr(vb, 0), - pcdev->base_csi + CSIDMASA_FB1); - pcdev->fb1_active = buf; - dma_inten = CSICR1_FB1_DMA_INTEN; - } else if (pcdev->fb2_active == NULL) { - writel(vb2_dma_contig_plane_dma_addr(vb, 0), - pcdev->base_csi + CSIDMASA_FB2); - pcdev->fb2_active = buf; - dma_inten = CSICR1_FB2_DMA_INTEN; - } - - if (dma_inten) { - list_del(&buf->internal.queue); - buf->state = MX2_STATE_ACTIVE; - - csicr3 = readl(pcdev->base_csi + CSICR3); - - /* Reflash DMA */ - writel(csicr3 | CSICR3_DMA_REFLASH_RFF, - pcdev->base_csi + CSICR3); - - /* clear & enable interrupts */ - writel(dma_inten, pcdev->base_csi + CSISR); - pcdev->csicr1 |= dma_inten; - writel(pcdev->csicr1, pcdev->base_csi + CSICR1); - - /* enable DMA */ - csicr3 |= CSICR3_DMA_REQ_EN_RFF | CSICR3_RXFF_LEVEL(1); - writel(csicr3, pcdev->base_csi + CSICR3); - } - } - - spin_unlock_irqrestore(&pcdev->lock, flags); -} - -static void mx2_videobuf_release(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->parent); - struct mx2_camera_dev *pcdev = ici->priv; - struct mx2_buffer *buf = container_of(vb, struct mx2_buffer, vb); - unsigned long flags; - -#ifdef DEBUG - dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__, - vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0)); - - switch (buf->state) { - case MX2_STATE_ACTIVE: - dev_info(icd->parent, "%s (active)\n", __func__); - break; - case MX2_STATE_QUEUED: - dev_info(icd->parent, "%s (queued)\n", __func__); - break; - default: - dev_info(icd->parent, "%s (unknown) %d\n", __func__, - buf->state); - break; - } -#endif - - /* - * Terminate only queued but inactive buffers. Active buffers are - * released when they become inactive after videobuf_waiton(). - * - * FIXME: implement forced termination of active buffers for mx27 and - * mx27 eMMA, so that the user won't get stuck in an uninterruptible - * state. This requires a specific handling for each of the these DMA - * types. - */ - - spin_lock_irqsave(&pcdev->lock, flags); - if (cpu_is_mx25() && buf->state == MX2_STATE_ACTIVE) { - if (pcdev->fb1_active == buf) { - pcdev->csicr1 &= ~CSICR1_FB1_DMA_INTEN; - writel(0, pcdev->base_csi + CSIDMASA_FB1); - pcdev->fb1_active = NULL; - } else if (pcdev->fb2_active == buf) { - pcdev->csicr1 &= ~CSICR1_FB2_DMA_INTEN; - writel(0, pcdev->base_csi + CSIDMASA_FB2); - pcdev->fb2_active = NULL; - } - writel(pcdev->csicr1, pcdev->base_csi + CSICR1); - } - spin_unlock_irqrestore(&pcdev->lock, flags); -} - -static void mx27_camera_emma_buf_init(struct soc_camera_device *icd, - int bytesperline) -{ - struct soc_camera_host *ici = - to_soc_camera_host(icd->parent); - struct mx2_camera_dev *pcdev = ici->priv; - struct mx2_fmt_cfg *prp = pcdev->emma_prp; - - writel((pcdev->s_width << 16) | pcdev->s_height, - pcdev->base_emma + PRP_SRC_FRAME_SIZE); - writel(prp->cfg.src_pixel, - pcdev->base_emma + PRP_SRC_PIXEL_FORMAT_CNTL); - if (prp->cfg.channel == 1) { - writel((icd->user_width << 16) | icd->user_height, - pcdev->base_emma + PRP_CH1_OUT_IMAGE_SIZE); - writel(bytesperline, - pcdev->base_emma + PRP_DEST_CH1_LINE_STRIDE); - writel(prp->cfg.ch1_pixel, - pcdev->base_emma + PRP_CH1_PIXEL_FORMAT_CNTL); - } else { /* channel 2 */ - writel((icd->user_width << 16) | icd->user_height, - pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE); - } - - /* Enable interrupts */ - writel(prp->cfg.irq_flags, pcdev->base_emma + PRP_INTR_CNTL); -} - -static void mx2_prp_resize_commit(struct mx2_camera_dev *pcdev) -{ - int dir; - - for (dir = RESIZE_DIR_H; dir <= RESIZE_DIR_V; dir++) { - unsigned char *s = pcdev->resizing[dir].s; - int len = pcdev->resizing[dir].len; - unsigned int coeff[2] = {0, 0}; - unsigned int valid = 0; - int i; - - if (len == 0) - continue; - - for (i = RESIZE_NUM_MAX - 1; i >= 0; i--) { - int j; - - j = i > 9 ? 1 : 0; - coeff[j] = (coeff[j] << BC_COEF) | - (s[i] & (SZ_COEF - 1)); - - if (i == 5 || i == 15) - coeff[j] <<= 1; - - valid = (valid << 1) | (s[i] >> BC_COEF); - } - - valid |= PRP_RZ_VALID_TBL_LEN(len); - - if (pcdev->resizing[dir].algo == RESIZE_ALGO_BILINEAR) - valid |= PRP_RZ_VALID_BILINEAR; - - if (pcdev->emma_prp->cfg.channel == 1) { - if (dir == RESIZE_DIR_H) { - writel(coeff[0], pcdev->base_emma + - PRP_CH1_RZ_HORI_COEF1); - writel(coeff[1], pcdev->base_emma + - PRP_CH1_RZ_HORI_COEF2); - writel(valid, pcdev->base_emma + - PRP_CH1_RZ_HORI_VALID); - } else { - writel(coeff[0], pcdev->base_emma + - PRP_CH1_RZ_VERT_COEF1); - writel(coeff[1], pcdev->base_emma + - PRP_CH1_RZ_VERT_COEF2); - writel(valid, pcdev->base_emma + - PRP_CH1_RZ_VERT_VALID); - } - } else { - if (dir == RESIZE_DIR_H) { - writel(coeff[0], pcdev->base_emma + - PRP_CH2_RZ_HORI_COEF1); - writel(coeff[1], pcdev->base_emma + - PRP_CH2_RZ_HORI_COEF2); - writel(valid, pcdev->base_emma + - PRP_CH2_RZ_HORI_VALID); - } else { - writel(coeff[0], pcdev->base_emma + - PRP_CH2_RZ_VERT_COEF1); - writel(coeff[1], pcdev->base_emma + - PRP_CH2_RZ_VERT_COEF2); - writel(valid, pcdev->base_emma + - PRP_CH2_RZ_VERT_VALID); - } - } - } -} - -static int mx2_start_streaming(struct vb2_queue *q, unsigned int count) -{ - struct soc_camera_device *icd = soc_camera_from_vb2q(q); - struct soc_camera_host *ici = - to_soc_camera_host(icd->parent); - struct mx2_camera_dev *pcdev = ici->priv; - struct mx2_fmt_cfg *prp = pcdev->emma_prp; - struct vb2_buffer *vb; - struct mx2_buffer *buf; - unsigned long phys; - int bytesperline; - - if (cpu_is_mx27()) { - unsigned long flags; - if (count < 2) - return -EINVAL; - - spin_lock_irqsave(&pcdev->lock, flags); - - buf = list_first_entry(&pcdev->capture, struct mx2_buffer, - internal.queue); - buf->internal.bufnum = 0; - vb = &buf->vb; - buf->state = MX2_STATE_ACTIVE; - - phys = vb2_dma_contig_plane_dma_addr(vb, 0); - mx27_update_emma_buf(pcdev, phys, buf->internal.bufnum); - list_move_tail(pcdev->capture.next, &pcdev->active_bufs); - - buf = list_first_entry(&pcdev->capture, struct mx2_buffer, - internal.queue); - buf->internal.bufnum = 1; - vb = &buf->vb; - buf->state = MX2_STATE_ACTIVE; - - phys = vb2_dma_contig_plane_dma_addr(vb, 0); - mx27_update_emma_buf(pcdev, phys, buf->internal.bufnum); - list_move_tail(pcdev->capture.next, &pcdev->active_bufs); - - bytesperline = soc_mbus_bytes_per_line(icd->user_width, - icd->current_fmt->host_fmt); - if (bytesperline < 0) - return bytesperline; - - /* - * I didn't manage to properly enable/disable the prp - * on a per frame basis during running transfers, - * thus we allocate a buffer here and use it to - * discard frames when no buffer is available. - * Feel free to work on this ;) - */ - pcdev->discard_size = icd->user_height * bytesperline; - pcdev->discard_buffer = dma_alloc_coherent(ici->v4l2_dev.dev, - pcdev->discard_size, &pcdev->discard_buffer_dma, - GFP_KERNEL); - if (!pcdev->discard_buffer) - return -ENOMEM; - - pcdev->buf_discard[0].discard = true; - list_add_tail(&pcdev->buf_discard[0].queue, - &pcdev->discard); - - pcdev->buf_discard[1].discard = true; - list_add_tail(&pcdev->buf_discard[1].queue, - &pcdev->discard); - - mx2_prp_resize_commit(pcdev); - - mx27_camera_emma_buf_init(icd, bytesperline); - - if (prp->cfg.channel == 1) { - writel(PRP_CNTL_CH1EN | - PRP_CNTL_CSIEN | - prp->cfg.in_fmt | - prp->cfg.out_fmt | - PRP_CNTL_CH1_LEN | - PRP_CNTL_CH1BYP | - PRP_CNTL_CH1_TSKIP(0) | - PRP_CNTL_IN_TSKIP(0), - pcdev->base_emma + PRP_CNTL); - } else { - writel(PRP_CNTL_CH2EN | - PRP_CNTL_CSIEN | - prp->cfg.in_fmt | - prp->cfg.out_fmt | - PRP_CNTL_CH2_LEN | - PRP_CNTL_CH2_TSKIP(0) | - PRP_CNTL_IN_TSKIP(0), - pcdev->base_emma + PRP_CNTL); - } - spin_unlock_irqrestore(&pcdev->lock, flags); - } - - return 0; -} - -static int mx2_stop_streaming(struct vb2_queue *q) -{ - struct soc_camera_device *icd = soc_camera_from_vb2q(q); - struct soc_camera_host *ici = - to_soc_camera_host(icd->parent); - struct mx2_camera_dev *pcdev = ici->priv; - struct mx2_fmt_cfg *prp = pcdev->emma_prp; - unsigned long flags; - void *b; - u32 cntl; - - if (cpu_is_mx27()) { - spin_lock_irqsave(&pcdev->lock, flags); - - cntl = readl(pcdev->base_emma + PRP_CNTL); - if (prp->cfg.channel == 1) { - writel(cntl & ~PRP_CNTL_CH1EN, - pcdev->base_emma + PRP_CNTL); - } else { - writel(cntl & ~PRP_CNTL_CH2EN, - pcdev->base_emma + PRP_CNTL); - } - INIT_LIST_HEAD(&pcdev->capture); - INIT_LIST_HEAD(&pcdev->active_bufs); - INIT_LIST_HEAD(&pcdev->discard); - - b = pcdev->discard_buffer; - pcdev->discard_buffer = NULL; - - spin_unlock_irqrestore(&pcdev->lock, flags); - - dma_free_coherent(ici->v4l2_dev.dev, - pcdev->discard_size, b, pcdev->discard_buffer_dma); - } - - return 0; -} - -static struct vb2_ops mx2_videobuf_ops = { - .queue_setup = mx2_videobuf_setup, - .buf_prepare = mx2_videobuf_prepare, - .buf_queue = mx2_videobuf_queue, - .buf_cleanup = mx2_videobuf_release, - .start_streaming = mx2_start_streaming, - .stop_streaming = mx2_stop_streaming, -}; - -static int mx2_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; - q->drv_priv = icd; - q->ops = &mx2_videobuf_ops; - q->mem_ops = &vb2_dma_contig_memops; - q->buf_struct_size = sizeof(struct mx2_buffer); - - return vb2_queue_init(q); -} - -#define MX2_BUS_FLAGS (V4L2_MBUS_MASTER | \ - V4L2_MBUS_VSYNC_ACTIVE_HIGH | \ - V4L2_MBUS_VSYNC_ACTIVE_LOW | \ - V4L2_MBUS_HSYNC_ACTIVE_HIGH | \ - V4L2_MBUS_HSYNC_ACTIVE_LOW | \ - V4L2_MBUS_PCLK_SAMPLE_RISING | \ - V4L2_MBUS_PCLK_SAMPLE_FALLING | \ - V4L2_MBUS_DATA_ACTIVE_HIGH | \ - V4L2_MBUS_DATA_ACTIVE_LOW) - -static int mx27_camera_emma_prp_reset(struct mx2_camera_dev *pcdev) -{ - u32 cntl; - int count = 0; - - cntl = readl(pcdev->base_emma + PRP_CNTL); - writel(PRP_CNTL_SWRST, pcdev->base_emma + PRP_CNTL); - while (count++ < 100) { - if (!(readl(pcdev->base_emma + PRP_CNTL) & PRP_CNTL_SWRST)) - return 0; - barrier(); - udelay(1); - } - - return -ETIMEDOUT; -} - -static int mx2_camera_set_bus_param(struct soc_camera_device *icd) -{ - struct v4l2_subdev *sd = soc_camera_to_subdev(icd); - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct mx2_camera_dev *pcdev = ici->priv; - struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,}; - unsigned long common_flags; - int ret; - int bytesperline; - u32 csicr1 = pcdev->csicr1; - - ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg); - if (!ret) { - common_flags = soc_mbus_config_compatible(&cfg, MX2_BUS_FLAGS); - if (!common_flags) { - dev_warn(icd->parent, - "Flags incompatible: camera 0x%x, host 0x%x\n", - cfg.flags, MX2_BUS_FLAGS); - return -EINVAL; - } - } else if (ret != -ENOIOCTLCMD) { - return ret; - } else { - common_flags = MX2_BUS_FLAGS; - } - - if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) && - (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) { - if (pcdev->platform_flags & MX2_CAMERA_HSYNC_HIGH) - common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW; - else - common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH; - } - - if ((common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING) && - (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)) { - if (pcdev->platform_flags & MX2_CAMERA_PCLK_SAMPLE_RISING) - common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_FALLING; - else - common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_RISING; - } - - cfg.flags = common_flags; - ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg); - if (ret < 0 && ret != -ENOIOCTLCMD) { - dev_dbg(icd->parent, "camera s_mbus_config(0x%lx) returned %d\n", - common_flags, ret); - return ret; - } - - csicr1 = (csicr1 & ~CSICR1_FMT_MASK) | pcdev->emma_prp->cfg.csicr1; - - if (common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING) - csicr1 |= CSICR1_REDGE; - if (common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) - csicr1 |= CSICR1_SOF_POL; - if (common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) - csicr1 |= CSICR1_HSYNC_POL; - if (pcdev->platform_flags & MX2_CAMERA_EXT_VSYNC) - csicr1 |= CSICR1_EXT_VSYNC; - if (pcdev->platform_flags & MX2_CAMERA_CCIR) - csicr1 |= CSICR1_CCIR_EN; - if (pcdev->platform_flags & MX2_CAMERA_CCIR_INTERLACE) - csicr1 |= CSICR1_CCIR_MODE; - if (pcdev->platform_flags & MX2_CAMERA_GATED_CLOCK) - csicr1 |= CSICR1_GCLK_MODE; - if (pcdev->platform_flags & MX2_CAMERA_INV_DATA) - csicr1 |= CSICR1_INV_DATA; - - pcdev->csicr1 = csicr1; - - bytesperline = soc_mbus_bytes_per_line(icd->user_width, - icd->current_fmt->host_fmt); - if (bytesperline < 0) - return bytesperline; - - if (cpu_is_mx27()) { - ret = mx27_camera_emma_prp_reset(pcdev); - if (ret) - return ret; - } else if (cpu_is_mx25()) { - writel((bytesperline * icd->user_height) >> 2, - pcdev->base_csi + CSIRXCNT); - writel((bytesperline << 16) | icd->user_height, - pcdev->base_csi + CSIIMAG_PARA); - } - - writel(pcdev->csicr1, pcdev->base_csi + CSICR1); - - return 0; -} - -static int mx2_camera_set_crop(struct soc_camera_device *icd, - struct v4l2_crop *a) -{ - struct v4l2_rect *rect = &a->c; - struct v4l2_subdev *sd = soc_camera_to_subdev(icd); - struct v4l2_mbus_framefmt mf; - int ret; - - soc_camera_limit_side(&rect->left, &rect->width, 0, 2, 4096); - soc_camera_limit_side(&rect->top, &rect->height, 0, 2, 4096); - - ret = v4l2_subdev_call(sd, video, s_crop, a); - if (ret < 0) - return ret; - - /* The capture device might have changed its output */ - ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf); - if (ret < 0) - return ret; - - dev_dbg(icd->parent, "Sensor cropped %dx%d\n", - mf.width, mf.height); - - icd->user_width = mf.width; - icd->user_height = mf.height; - - return ret; -} - -static int mx2_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); - const struct soc_mbus_pixelfmt *fmt; - struct device *dev = icd->parent; - enum v4l2_mbus_pixelcode code; - int ret, formats = 0; - - 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(dev, "Invalid format code #%u: %d\n", idx, code); - return 0; - } - - if (code == V4L2_MBUS_FMT_YUYV8_2X8 || - code == V4L2_MBUS_FMT_UYVY8_2X8) { - formats++; - if (xlate) { - /* - * CH2 can output YUV420 which is a standard format in - * soc_mediabus.c - */ - xlate->host_fmt = - soc_mbus_get_fmtdesc(V4L2_MBUS_FMT_YUYV8_1_5X8); - xlate->code = code; - dev_dbg(dev, "Providing host format %s for sensor code %d\n", - xlate->host_fmt->name, code); - xlate++; - } - } - - /* Generic pass-trough */ - formats++; - if (xlate) { - xlate->host_fmt = fmt; - xlate->code = code; - xlate++; - } - return formats; -} - -static int mx2_emmaprp_resize(struct mx2_camera_dev *pcdev, - struct v4l2_mbus_framefmt *mf_in, - struct v4l2_pix_format *pix_out, bool apply) -{ - int num, den; - unsigned long m; - int i, dir; - - for (dir = RESIZE_DIR_H; dir <= RESIZE_DIR_V; dir++) { - struct emma_prp_resize tmprsz; - unsigned char *s = tmprsz.s; - int len = 0; - int in, out; - - if (dir == RESIZE_DIR_H) { - in = mf_in->width; - out = pix_out->width; - } else { - in = mf_in->height; - out = pix_out->height; - } - - if (in < out) - return -EINVAL; - else if (in == out) - continue; - - /* Calculate ratio */ - m = gcd(in, out); - num = in / m; - den = out / m; - if (num > RESIZE_NUM_MAX) - return -EINVAL; - - if ((num >= 2 * den) && (den == 1) && - (num < 9) && (!(num & 0x01))) { - int sum = 0; - int j; - - /* Average scaling for >= 2:1 ratios */ - /* Support can be added for num >=9 and odd values */ - - tmprsz.algo = RESIZE_ALGO_AVERAGING; - len = num; - - for (i = 0; i < (len / 2); i++) - s[i] = 8; - - do { - for (i = 0; i < (len / 2); i++) { - s[i] = s[i] >> 1; - sum = 0; - for (j = 0; j < (len / 2); j++) - sum += s[j]; - if (sum == 4) - break; - } - } while (sum != 4); - - for (i = (len / 2); i < len; i++) - s[i] = s[len - i - 1]; - - s[len - 1] |= SZ_COEF; - } else { - /* bilinear scaling for < 2:1 ratios */ - int v; /* overflow counter */ - int coeff, nxt; /* table output */ - int in_pos_inc = 2 * den; - int out_pos = num; - int out_pos_inc = 2 * num; - int init_carry = num - den; - int carry = init_carry; - - tmprsz.algo = RESIZE_ALGO_BILINEAR; - v = den + in_pos_inc; - do { - coeff = v - out_pos; - out_pos += out_pos_inc; - carry += out_pos_inc; - for (nxt = 0; v < out_pos; nxt++) { - v += in_pos_inc; - carry -= in_pos_inc; - } - - if (len > RESIZE_NUM_MAX) - return -EINVAL; - - coeff = ((coeff << BC_COEF) + - (in_pos_inc >> 1)) / in_pos_inc; - - if (coeff >= (SZ_COEF - 1)) - coeff--; - - coeff |= SZ_COEF; - s[len] = (unsigned char)coeff; - len++; - - for (i = 1; i < nxt; i++) { - if (len >= RESIZE_NUM_MAX) - return -EINVAL; - s[len] = 0; - len++; - } - } while (carry != init_carry); - } - tmprsz.len = len; - if (dir == RESIZE_DIR_H) - mf_in->width = pix_out->width; - else - mf_in->height = pix_out->height; - - if (apply) - memcpy(&pcdev->resizing[dir], &tmprsz, sizeof(tmprsz)); - } - return 0; -} - -static int mx2_camera_set_fmt(struct soc_camera_device *icd, - struct v4l2_format *f) -{ - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct mx2_camera_dev *pcdev = 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; - - dev_dbg(icd->parent, "%s: requested params: width = %d, height = %d\n", - __func__, pix->width, pix->height); - - xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); - if (!xlate) { - dev_warn(icd->parent, "Format %x not found\n", - pix->pixelformat); - return -EINVAL; - } - - 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 && ret != -ENOIOCTLCMD) - return ret; - - /* Store width and height returned by the sensor for resizing */ - pcdev->s_width = mf.width; - pcdev->s_height = mf.height; - dev_dbg(icd->parent, "%s: sensor params: width = %d, height = %d\n", - __func__, pcdev->s_width, pcdev->s_height); - - pcdev->emma_prp = mx27_emma_prp_get_format(xlate->code, - xlate->host_fmt->fourcc); - - memset(pcdev->resizing, 0, sizeof(pcdev->resizing)); - if ((mf.width != pix->width || mf.height != pix->height) && - pcdev->emma_prp->cfg.in_fmt == PRP_CNTL_DATA_IN_YUV422) { - if (mx2_emmaprp_resize(pcdev, &mf, pix, true) < 0) - dev_dbg(icd->parent, "%s: can't resize\n", __func__); - } - - if (mf.code != xlate->code) - return -EINVAL; - - pix->width = mf.width; - pix->height = mf.height; - pix->field = mf.field; - pix->colorspace = mf.colorspace; - icd->current_fmt = xlate; - - dev_dbg(icd->parent, "%s: returned params: width = %d, height = %d\n", - __func__, pix->width, pix->height); - - return 0; -} - -static int mx2_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; - struct soc_camera_host *ici = to_soc_camera_host(icd->parent); - struct mx2_camera_dev *pcdev = ici->priv; - unsigned int width_limit; - int ret; - - dev_dbg(icd->parent, "%s: requested params: width = %d, height = %d\n", - __func__, pix->width, pix->height); - - xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); - if (pixfmt && !xlate) { - dev_warn(icd->parent, "Format %x not found\n", pixfmt); - return -EINVAL; - } - - /* FIXME: implement MX27 limits */ - - /* limit to MX25 hardware capabilities */ - if (cpu_is_mx25()) { - if (xlate->host_fmt->bits_per_sample <= 8) - width_limit = 0xffff * 4; - else - width_limit = 0xffff * 2; - /* CSIIMAG_PARA limit */ - if (pix->width > width_limit) - pix->width = width_limit; - if (pix->height > 0xffff) - pix->height = 0xffff; - - pix->bytesperline = soc_mbus_bytes_per_line(pix->width, - xlate->host_fmt); - if (pix->bytesperline < 0) - return pix->bytesperline; - pix->sizeimage = soc_mbus_image_size(xlate->host_fmt, - pix->bytesperline, pix->height); - /* Check against the CSIRXCNT limit */ - if (pix->sizeimage > 4 * 0x3ffff) { - /* Adjust geometry, preserve aspect ratio */ - unsigned int new_height = int_sqrt(div_u64(0x3ffffULL * - 4 * pix->height, pix->bytesperline)); - pix->width = new_height * pix->width / pix->height; - pix->height = new_height; - pix->bytesperline = soc_mbus_bytes_per_line(pix->width, - xlate->host_fmt); - BUG_ON(pix->bytesperline < 0); - pix->sizeimage = soc_mbus_image_size(xlate->host_fmt, - pix->bytesperline, pix->height); - } - } - - /* 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; - - dev_dbg(icd->parent, "%s: sensor params: width = %d, height = %d\n", - __func__, pcdev->s_width, pcdev->s_height); - - /* If the sensor does not support image size try PrP resizing */ - pcdev->emma_prp = mx27_emma_prp_get_format(xlate->code, - xlate->host_fmt->fourcc); - - memset(pcdev->resizing, 0, sizeof(pcdev->resizing)); - if ((mf.width != pix->width || mf.height != pix->height) && - pcdev->emma_prp->cfg.in_fmt == PRP_CNTL_DATA_IN_YUV422) { - if (mx2_emmaprp_resize(pcdev, &mf, pix, false) < 0) - dev_dbg(icd->parent, "%s: can't resize\n", __func__); - } - - if (mf.field == V4L2_FIELD_ANY) - mf.field = V4L2_FIELD_NONE; - /* - * Driver supports interlaced images provided they have - * both fields so that they can be processed as if they - * were progressive. - */ - if (mf.field != V4L2_FIELD_NONE && !V4L2_FIELD_HAS_BOTH(mf.field)) { - dev_err(icd->parent, "Field type %d unsupported.\n", - mf.field); - return -EINVAL; - } - - pix->width = mf.width; - pix->height = mf.height; - pix->field = mf.field; - pix->colorspace = mf.colorspace; - - dev_dbg(icd->parent, "%s: returned params: width = %d, height = %d\n", - __func__, pix->width, pix->height); - - return 0; -} - -static int mx2_camera_querycap(struct soc_camera_host *ici, - struct v4l2_capability *cap) -{ - /* cap->name is set by the friendly caller:-> */ - strlcpy(cap->card, MX2_CAM_DRIVER_DESCRIPTION, sizeof(cap->card)); - cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; - - return 0; -} - -static unsigned int mx2_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 struct soc_camera_host_ops mx2_soc_camera_host_ops = { - .owner = THIS_MODULE, - .add = mx2_camera_add_device, - .remove = mx2_camera_remove_device, - .set_fmt = mx2_camera_set_fmt, - .set_crop = mx2_camera_set_crop, - .get_formats = mx2_camera_get_formats, - .try_fmt = mx2_camera_try_fmt, - .init_videobuf2 = mx2_camera_init_videobuf, - .poll = mx2_camera_poll, - .querycap = mx2_camera_querycap, - .set_bus_param = mx2_camera_set_bus_param, -}; - -static void mx27_camera_frame_done_emma(struct mx2_camera_dev *pcdev, - int bufnum, bool err) -{ -#ifdef DEBUG - struct mx2_fmt_cfg *prp = pcdev->emma_prp; -#endif - struct mx2_buf_internal *ibuf; - struct mx2_buffer *buf; - struct vb2_buffer *vb; - unsigned long phys; - - ibuf = list_first_entry(&pcdev->active_bufs, struct mx2_buf_internal, - queue); - - BUG_ON(ibuf->bufnum != bufnum); - - if (ibuf->discard) { - /* - * Discard buffer must not be returned to user space. - * Just return it to the discard queue. - */ - list_move_tail(pcdev->active_bufs.next, &pcdev->discard); - } else { - buf = mx2_ibuf_to_buf(ibuf); - - vb = &buf->vb; -#ifdef DEBUG - phys = vb2_dma_contig_plane_dma_addr(vb, 0); - if (prp->cfg.channel == 1) { - if (readl(pcdev->base_emma + PRP_DEST_RGB1_PTR + - 4 * bufnum) != phys) { - dev_err(pcdev->dev, "%lx != %x\n", phys, - readl(pcdev->base_emma + - PRP_DEST_RGB1_PTR + 4 * bufnum)); - } - } else { - if (readl(pcdev->base_emma + PRP_DEST_Y_PTR - - 0x14 * bufnum) != phys) { - dev_err(pcdev->dev, "%lx != %x\n", phys, - readl(pcdev->base_emma + - PRP_DEST_Y_PTR - 0x14 * bufnum)); - } - } -#endif - dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%p %lu\n", __func__, vb, - vb2_plane_vaddr(vb, 0), - vb2_get_plane_payload(vb, 0)); - - list_del_init(&buf->internal.queue); - do_gettimeofday(&vb->v4l2_buf.timestamp); - vb->v4l2_buf.sequence = pcdev->frame_count; - if (err) - vb2_buffer_done(vb, VB2_BUF_STATE_ERROR); - else - vb2_buffer_done(vb, VB2_BUF_STATE_DONE); - } - - pcdev->frame_count++; - - if (list_empty(&pcdev->capture)) { - if (list_empty(&pcdev->discard)) { - dev_warn(pcdev->dev, "%s: trying to access empty discard list\n", - __func__); - return; - } - - ibuf = list_first_entry(&pcdev->discard, - struct mx2_buf_internal, queue); - ibuf->bufnum = bufnum; - - list_move_tail(pcdev->discard.next, &pcdev->active_bufs); - mx27_update_emma_buf(pcdev, pcdev->discard_buffer_dma, bufnum); - return; - } - - buf = list_first_entry(&pcdev->capture, struct mx2_buffer, - internal.queue); - - buf->internal.bufnum = bufnum; - - list_move_tail(pcdev->capture.next, &pcdev->active_bufs); - - vb = &buf->vb; - buf->state = MX2_STATE_ACTIVE; - - phys = vb2_dma_contig_plane_dma_addr(vb, 0); - mx27_update_emma_buf(pcdev, phys, bufnum); -} - -static irqreturn_t mx27_camera_emma_irq(int irq_emma, void *data) -{ - struct mx2_camera_dev *pcdev = data; - unsigned int status = readl(pcdev->base_emma + PRP_INTRSTATUS); - struct mx2_buf_internal *ibuf; - - spin_lock(&pcdev->lock); - - if (list_empty(&pcdev->active_bufs)) { - dev_warn(pcdev->dev, "%s: called while active list is empty\n", - __func__); - - if (!status) { - spin_unlock(&pcdev->lock); - return IRQ_NONE; - } - } - - if (status & (1 << 7)) { /* overflow */ - u32 cntl = readl(pcdev->base_emma + PRP_CNTL); - writel(cntl & ~(PRP_CNTL_CH1EN | PRP_CNTL_CH2EN), - pcdev->base_emma + PRP_CNTL); - writel(cntl, pcdev->base_emma + PRP_CNTL); - - ibuf = list_first_entry(&pcdev->active_bufs, - struct mx2_buf_internal, queue); - mx27_camera_frame_done_emma(pcdev, - ibuf->bufnum, true); - - status &= ~(1 << 7); - } else if (((status & (3 << 5)) == (3 << 5)) || - ((status & (3 << 3)) == (3 << 3))) { - /* - * Both buffers have triggered, process the one we're expecting - * to first - */ - ibuf = list_first_entry(&pcdev->active_bufs, - struct mx2_buf_internal, queue); - mx27_camera_frame_done_emma(pcdev, ibuf->bufnum, false); - status &= ~(1 << (6 - ibuf->bufnum)); /* mark processed */ - } else if ((status & (1 << 6)) || (status & (1 << 4))) { - mx27_camera_frame_done_emma(pcdev, 0, false); - } else if ((status & (1 << 5)) || (status & (1 << 3))) { - mx27_camera_frame_done_emma(pcdev, 1, false); - } - - spin_unlock(&pcdev->lock); - writel(status, pcdev->base_emma + PRP_INTRSTATUS); - - return IRQ_HANDLED; -} - -static int __devinit mx27_camera_emma_init(struct mx2_camera_dev *pcdev) -{ - struct resource *res_emma = pcdev->res_emma; - int err = 0; - - if (!request_mem_region(res_emma->start, resource_size(res_emma), - MX2_CAM_DRV_NAME)) { - err = -EBUSY; - goto out; - } - - pcdev->base_emma = ioremap(res_emma->start, resource_size(res_emma)); - if (!pcdev->base_emma) { - err = -ENOMEM; - goto exit_release; - } - - err = request_irq(pcdev->irq_emma, mx27_camera_emma_irq, 0, - MX2_CAM_DRV_NAME, pcdev); - if (err) { - dev_err(pcdev->dev, "Camera EMMA interrupt register failed \n"); - goto exit_iounmap; - } - - pcdev->clk_emma_ipg = clk_get(pcdev->dev, "emma-ipg"); - if (IS_ERR(pcdev->clk_emma_ipg)) { - err = PTR_ERR(pcdev->clk_emma_ipg); - goto exit_free_irq; - } - - clk_prepare_enable(pcdev->clk_emma_ipg); - - pcdev->clk_emma_ahb = clk_get(pcdev->dev, "emma-ahb"); - if (IS_ERR(pcdev->clk_emma_ahb)) { - err = PTR_ERR(pcdev->clk_emma_ahb); - goto exit_clk_emma_ipg_put; - } - - clk_prepare_enable(pcdev->clk_emma_ahb); - - err = mx27_camera_emma_prp_reset(pcdev); - if (err) - goto exit_clk_emma_ahb_put; - - return err; - -exit_clk_emma_ahb_put: - clk_disable_unprepare(pcdev->clk_emma_ahb); - clk_put(pcdev->clk_emma_ahb); -exit_clk_emma_ipg_put: - clk_disable_unprepare(pcdev->clk_emma_ipg); - clk_put(pcdev->clk_emma_ipg); -exit_free_irq: - free_irq(pcdev->irq_emma, pcdev); -exit_iounmap: - iounmap(pcdev->base_emma); -exit_release: - release_mem_region(res_emma->start, resource_size(res_emma)); -out: - return err; -} - -static int __devinit mx2_camera_probe(struct platform_device *pdev) -{ - struct mx2_camera_dev *pcdev; - struct resource *res_csi, *res_emma; - void __iomem *base_csi; - int irq_csi, irq_emma; - int err = 0; - - dev_dbg(&pdev->dev, "initialising\n"); - - res_csi = platform_get_resource(pdev, IORESOURCE_MEM, 0); - irq_csi = platform_get_irq(pdev, 0); - if (res_csi == NULL || irq_csi < 0) { - dev_err(&pdev->dev, "Missing platform resources data\n"); - 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_csi = clk_get(&pdev->dev, "ahb"); - if (IS_ERR(pcdev->clk_csi)) { - dev_err(&pdev->dev, "Could not get csi clock\n"); - err = PTR_ERR(pcdev->clk_csi); - goto exit_kfree; - } - - pcdev->res_csi = res_csi; - pcdev->pdata = pdev->dev.platform_data; - if (pcdev->pdata) { - long rate; - - pcdev->platform_flags = pcdev->pdata->flags; - - rate = clk_round_rate(pcdev->clk_csi, pcdev->pdata->clk * 2); - if (rate <= 0) { - err = -ENODEV; - goto exit_dma_free; - } - err = clk_set_rate(pcdev->clk_csi, rate); - if (err < 0) - goto exit_dma_free; - } - - INIT_LIST_HEAD(&pcdev->capture); - INIT_LIST_HEAD(&pcdev->active_bufs); - INIT_LIST_HEAD(&pcdev->discard); - spin_lock_init(&pcdev->lock); - - /* - * Request the regions. - */ - if (!request_mem_region(res_csi->start, resource_size(res_csi), - MX2_CAM_DRV_NAME)) { - err = -EBUSY; - goto exit_dma_free; - } - - base_csi = ioremap(res_csi->start, resource_size(res_csi)); - if (!base_csi) { - err = -ENOMEM; - goto exit_release; - } - pcdev->irq_csi = irq_csi; - pcdev->base_csi = base_csi; - pcdev->base_dma = res_csi->start; - pcdev->dev = &pdev->dev; - - if (cpu_is_mx25()) { - err = request_irq(pcdev->irq_csi, mx25_camera_irq, 0, - MX2_CAM_DRV_NAME, pcdev); - if (err) { - dev_err(pcdev->dev, "Camera interrupt register failed \n"); - goto exit_iounmap; - } - } - - if (cpu_is_mx27()) { - /* EMMA support */ - res_emma = platform_get_resource(pdev, IORESOURCE_MEM, 1); - irq_emma = platform_get_irq(pdev, 1); - - if (!res_emma || !irq_emma) { - dev_err(&pdev->dev, "no EMMA resources\n"); - goto exit_free_irq; - } - - pcdev->res_emma = res_emma; - pcdev->irq_emma = irq_emma; - if (mx27_camera_emma_init(pcdev)) - goto exit_free_irq; - } - - pcdev->soc_host.drv_name = MX2_CAM_DRV_NAME, - pcdev->soc_host.ops = &mx2_soc_camera_host_ops, - pcdev->soc_host.priv = pcdev; - pcdev->soc_host.v4l2_dev.dev = &pdev->dev; - pcdev->soc_host.nr = pdev->id; - if (cpu_is_mx25()) - pcdev->soc_host.capabilities = SOCAM_HOST_CAP_STRIDE; - - pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev); - if (IS_ERR(pcdev->alloc_ctx)) { - err = PTR_ERR(pcdev->alloc_ctx); - goto eallocctx; - } - err = soc_camera_host_register(&pcdev->soc_host); - if (err) - goto exit_free_emma; - - dev_info(&pdev->dev, "MX2 Camera (CSI) driver probed, clock frequency: %ld\n", - clk_get_rate(pcdev->clk_csi)); - - return 0; - -exit_free_emma: - vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); -eallocctx: - if (cpu_is_mx27()) { - free_irq(pcdev->irq_emma, pcdev); - clk_disable_unprepare(pcdev->clk_emma_ipg); - clk_put(pcdev->clk_emma_ipg); - clk_disable_unprepare(pcdev->clk_emma_ahb); - clk_put(pcdev->clk_emma_ahb); - iounmap(pcdev->base_emma); - release_mem_region(pcdev->res_emma->start, resource_size(pcdev->res_emma)); - } -exit_free_irq: - if (cpu_is_mx25()) - free_irq(pcdev->irq_csi, pcdev); -exit_iounmap: - iounmap(base_csi); -exit_release: - release_mem_region(res_csi->start, resource_size(res_csi)); -exit_dma_free: - clk_put(pcdev->clk_csi); -exit_kfree: - kfree(pcdev); -exit: - return err; -} - -static int __devexit mx2_camera_remove(struct platform_device *pdev) -{ - struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev); - struct mx2_camera_dev *pcdev = container_of(soc_host, - struct mx2_camera_dev, soc_host); - struct resource *res; - - clk_put(pcdev->clk_csi); - if (cpu_is_mx25()) - free_irq(pcdev->irq_csi, pcdev); - if (cpu_is_mx27()) - free_irq(pcdev->irq_emma, pcdev); - - soc_camera_host_unregister(&pcdev->soc_host); - - vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); - - iounmap(pcdev->base_csi); - - if (cpu_is_mx27()) { - clk_disable_unprepare(pcdev->clk_emma_ipg); - clk_put(pcdev->clk_emma_ipg); - clk_disable_unprepare(pcdev->clk_emma_ahb); - clk_put(pcdev->clk_emma_ahb); - iounmap(pcdev->base_emma); - res = pcdev->res_emma; - release_mem_region(res->start, resource_size(res)); - } - - res = pcdev->res_csi; - release_mem_region(res->start, resource_size(res)); - - kfree(pcdev); - - dev_info(&pdev->dev, "MX2 Camera driver unloaded\n"); - - return 0; -} - -static struct platform_driver mx2_camera_driver = { - .driver = { - .name = MX2_CAM_DRV_NAME, - }, - .remove = __devexit_p(mx2_camera_remove), -}; - - -static int __init mx2_camera_init(void) -{ - return platform_driver_probe(&mx2_camera_driver, &mx2_camera_probe); -} - -static void __exit mx2_camera_exit(void) -{ - return platform_driver_unregister(&mx2_camera_driver); -} - -module_init(mx2_camera_init); -module_exit(mx2_camera_exit); - -MODULE_DESCRIPTION("i.MX27/i.MX25 SoC Camera Host driver"); -MODULE_AUTHOR("Sascha Hauer <sha@pengutronix.de>"); -MODULE_LICENSE("GPL"); -MODULE_VERSION(MX2_CAM_VERSION); |