/* * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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 "); MODULE_LICENSE("GPL"); MODULE_VERSION(MX2_CAM_VERSION);