diff options
Diffstat (limited to 'drivers/media/video/mx2_camera.c')
| -rw-r--r-- | drivers/media/video/mx2_camera.c | 1513 |
1 files changed, 1513 insertions, 0 deletions
diff --git a/drivers/media/video/mx2_camera.c b/drivers/media/video/mx2_camera.c new file mode 100644 index 000000000000..026bef0ba403 --- /dev/null +++ b/drivers/media/video/mx2_camera.c @@ -0,0 +1,1513 @@ +/* + * V4L2 Driver for i.MX27/i.MX25 camera host + * + * Copyright (C) 2008, Sascha Hauer, Pengutronix + * Copyright (C) 2010, Baruch Siach, Orex Computed Radiography + * + * 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/interrupt.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/moduleparam.h> +#include <linux/time.h> +#include <linux/version.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/videobuf-dma-contig.h> +#include <media/soc_camera.h> +#include <media/soc_mediabus.h> + +#include <linux/videodev2.h> + +#include <mach/mx2_cam.h> +#ifdef CONFIG_MACH_MX27 +#include <mach/dma-mx1-mx2.h> +#endif +#include <mach/hardware.h> + +#include <asm/dma.h> + +#define MX2_CAM_DRV_NAME "mx2-camera" +#define MX2_CAM_VERSION_CODE KERNEL_VERSION(0, 0, 5) +#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 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) + +#define mx27_camera_emma(pcdev) (cpu_is_mx27() && pcdev->use_emma) + +#define MAX_VIDEO_MEM 16 + +struct mx2_camera_dev { + struct device *dev; + struct soc_camera_host soc_host; + struct soc_camera_device *icd; + struct clk *clk_csi, *clk_emma; + + 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; + + spinlock_t lock; + + int dma; + struct mx2_buffer *active; + struct mx2_buffer *fb1_active; + struct mx2_buffer *fb2_active; + + int use_emma; + + u32 csicr1; + + void *discard_buffer; + dma_addr_t discard_buffer_dma; + size_t discard_size; +}; + +/* buffer for one video frame */ +struct mx2_buffer { + /* common v4l buffer stuff -- must be first */ + struct videobuf_buffer vb; + + enum v4l2_mbus_pixelcode code; + + int bufnum; +}; + +static void mx2_camera_deactivate(struct mx2_camera_dev *pcdev) +{ + unsigned long flags; + + clk_disable(pcdev->clk_csi); + writel(0, pcdev->base_csi + CSICR1); + if (mx27_camera_emma(pcdev)) { + 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->dev.parent); + struct mx2_camera_dev *pcdev = ici->priv; + int ret; + u32 csicr1; + + if (pcdev->icd) + return -EBUSY; + + ret = clk_enable(pcdev->clk_csi); + if (ret < 0) + return ret; + + csicr1 = CSICR1_MCLKEN; + + if (mx27_camera_emma(pcdev)) { + 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; + + dev_info(icd->dev.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->dev.parent); + struct mx2_camera_dev *pcdev = ici->priv; + + BUG_ON(icd != pcdev->icd); + + dev_info(icd->dev.parent, "Camera driver detached from camera %d\n", + icd->devnum); + + mx2_camera_deactivate(pcdev); + + if (pcdev->discard_buffer) { + dma_free_coherent(ici->v4l2_dev.dev, pcdev->discard_size, + pcdev->discard_buffer, + pcdev->discard_buffer_dma); + pcdev->discard_buffer = NULL; + } + + pcdev->icd = NULL; +} + +#ifdef CONFIG_MACH_MX27 +static void mx27_camera_dma_enable(struct mx2_camera_dev *pcdev) +{ + u32 tmp; + + imx_dma_enable(pcdev->dma); + + tmp = readl(pcdev->base_csi + CSICR1); + tmp |= CSICR1_RF_OR_INTEN; + writel(tmp, pcdev->base_csi + CSICR1); +} + +static irqreturn_t mx27_camera_irq(int irq_csi, void *data) +{ + struct mx2_camera_dev *pcdev = data; + u32 status = readl(pcdev->base_csi + CSISR); + + if (status & CSISR_SOF_INT && pcdev->active) { + u32 tmp; + + tmp = readl(pcdev->base_csi + CSICR1); + writel(tmp | CSICR1_CLR_RXFIFO, pcdev->base_csi + CSICR1); + mx27_camera_dma_enable(pcdev); + } + + writel(CSISR_SOF_INT | CSISR_RFF_OR_INT, pcdev->base_csi + CSISR); + + return IRQ_HANDLED; +} +#else +static irqreturn_t mx27_camera_irq(int irq_csi, void *data) +{ + return IRQ_NONE; +} +#endif /* CONFIG_MACH_MX27 */ + +static void mx25_camera_frame_done(struct mx2_camera_dev *pcdev, int fb, + int state) +{ + struct videobuf_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); + + vb = &(*fb_active)->vb; + dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, + vb, vb->baddr, vb->bsize); + + vb->state = state; + do_gettimeofday(&vb->ts); + vb->field_count++; + + wake_up(&vb->done); + + if (list_empty(&pcdev->capture)) { + buf = NULL; + writel(0, pcdev->base_csi + fb_reg); + } else { + buf = list_entry(pcdev->capture.next, struct mx2_buffer, + vb.queue); + vb = &buf->vb; + list_del(&vb->queue); + vb->state = VIDEOBUF_ACTIVE; + writel(videobuf_to_dma_contig(vb), pcdev->base_csi + fb_reg); + } + + *fb_active = buf; + + 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, VIDEOBUF_DONE); + else if (status & CSISR_DMA_TSF_FB2_INT) + mx25_camera_frame_done(pcdev, 2, VIDEOBUF_DONE); + + /* FIXME: handle CSISR_RFF_OR_INT */ + + writel(status, pcdev->base_csi + CSISR); + + return IRQ_HANDLED; +} + +/* + * Videobuf operations + */ +static int mx2_videobuf_setup(struct videobuf_queue *vq, unsigned int *count, + unsigned int *size) +{ + struct soc_camera_device *icd = vq->priv_data; + int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width, + icd->current_fmt->host_fmt); + + dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size); + + if (bytes_per_line < 0) + return bytes_per_line; + + *size = bytes_per_line * icd->user_height; + + if (0 == *count) + *count = 32; + if (*size * *count > MAX_VIDEO_MEM * 1024 * 1024) + *count = (MAX_VIDEO_MEM * 1024 * 1024) / *size; + + return 0; +} + +static void free_buffer(struct videobuf_queue *vq, struct mx2_buffer *buf) +{ + struct soc_camera_device *icd = vq->priv_data; + struct videobuf_buffer *vb = &buf->vb; + + dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, + vb, vb->baddr, vb->bsize); + + /* + * This waits until this buffer is out of danger, i.e., until it is no + * longer in STATE_QUEUED or STATE_ACTIVE + */ + videobuf_waiton(vb, 0, 0); + + videobuf_dma_contig_free(vq, vb); + dev_dbg(&icd->dev, "%s freed\n", __func__); + + vb->state = VIDEOBUF_NEEDS_INIT; +} + +static int mx2_videobuf_prepare(struct videobuf_queue *vq, + struct videobuf_buffer *vb, enum v4l2_field field) +{ + struct soc_camera_device *icd = vq->priv_data; + struct mx2_buffer *buf = container_of(vb, struct mx2_buffer, vb); + int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width, + icd->current_fmt->host_fmt); + int ret = 0; + + dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, + vb, vb->baddr, vb->bsize); + + if (bytes_per_line < 0) + return bytes_per_line; + +#ifdef DEBUG + /* + * This can be useful if you want to see if we actually fill + * the buffer with something + */ + memset((void *)vb->baddr, 0xaa, vb->bsize); +#endif + + if (buf->code != icd->current_fmt->code || + vb->width != icd->user_width || + vb->height != icd->user_height || + vb->field != field) { + buf->code = icd->current_fmt->code; + vb->width = icd->user_width; + vb->height = icd->user_height; + vb->field = field; + vb->state = VIDEOBUF_NEEDS_INIT; + } + + vb->size = bytes_per_line * vb->height; + if (vb->baddr && vb->bsize < vb->size) { + ret = -EINVAL; + goto out; + } + + if (vb->state == VIDEOBUF_NEEDS_INIT) { + ret = videobuf_iolock(vq, vb, NULL); + if (ret) + goto fail; + + vb->state = VIDEOBUF_PREPARED; + } + + return 0; + +fail: + free_buffer(vq, buf); +out: + return ret; +} + +static void mx2_videobuf_queue(struct videobuf_queue *vq, + struct videobuf_buffer *vb) +{ + struct soc_camera_device *icd = vq->priv_data; + struct soc_camera_host *ici = + to_soc_camera_host(icd->dev.parent); + struct mx2_camera_dev *pcdev = ici->priv; + struct mx2_buffer *buf = container_of(vb, struct mx2_buffer, vb); + unsigned long flags; + + dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, + vb, vb->baddr, vb->bsize); + + spin_lock_irqsave(&pcdev->lock, flags); + + vb->state = VIDEOBUF_QUEUED; + list_add_tail(&vb->queue, &pcdev->capture); + + if (mx27_camera_emma(pcdev)) { + goto out; +#ifdef CONFIG_MACH_MX27 + } else if (cpu_is_mx27()) { + int ret; + + if (pcdev->active == NULL) { + ret = imx_dma_setup_single(pcdev->dma, + videobuf_to_dma_contig(vb), vb->size, + (u32)pcdev->base_dma + 0x10, + DMA_MODE_READ); + if (ret) { + vb->state = VIDEOBUF_ERROR; + wake_up(&vb->done); + goto out; + } + + vb->state = VIDEOBUF_ACTIVE; + pcdev->active = buf; + } +#endif + } else { /* cpu_is_mx25() */ + u32 csicr3, dma_inten = 0; + + if (pcdev->fb1_active == NULL) { + writel(videobuf_to_dma_contig(vb), + pcdev->base_csi + CSIDMASA_FB1); + pcdev->fb1_active = buf; + dma_inten = CSICR1_FB1_DMA_INTEN; + } else if (pcdev->fb2_active == NULL) { + writel(videobuf_to_dma_contig(vb), + pcdev->base_csi + CSIDMASA_FB2); + pcdev->fb2_active = buf; + dma_inten = CSICR1_FB2_DMA_INTEN; + } + + if (dma_inten) { + list_del(&vb->queue); + vb->state = VIDEOBUF_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); + } + } + +out: + spin_unlock_irqrestore(&pcdev->lock, flags); +} + +static void mx2_videobuf_release(struct videobuf_queue *vq, + struct videobuf_buffer *vb) +{ + struct soc_camera_device *icd = vq->priv_data; + struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); + struct 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->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, + vb, vb->baddr, vb->bsize); + + switch (vb->state) { + case VIDEOBUF_ACTIVE: + dev_info(&icd->dev, "%s (active)\n", __func__); + break; + case VIDEOBUF_QUEUED: + dev_info(&icd->dev, "%s (queued)\n", __func__); + break; + case VIDEOBUF_PREPARED: + dev_info(&icd->dev, "%s (prepared)\n", __func__); + break; + default: + dev_info(&icd->dev, "%s (unknown) %d\n", __func__, + vb->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, so that the + * user won't get stuck in an uninterruptible state. This requires a + * specific handling for each of the three DMA types that this driver + * supports. + */ + spin_lock_irqsave(&pcdev->lock, flags); + if (vb->state == VIDEOBUF_QUEUED) { + list_del(&vb->queue); + vb->state = VIDEOBUF_ERROR; + } + spin_unlock_irqrestore(&pcdev->lock, flags); + + free_buffer(vq, buf); +} + +static struct videobuf_queue_ops mx2_videobuf_ops = { + .buf_setup = mx2_videobuf_setup, + .buf_prepare = mx2_videobuf_prepare, + .buf_queue = mx2_videobuf_queue, + .buf_release = mx2_videobuf_release, +}; + +static void mx2_camera_init_videobuf(struct videobuf_queue *q, + struct soc_camera_device *icd) +{ + struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); + struct mx2_camera_dev *pcdev = ici->priv; + + videobuf_queue_dma_contig_init(q, &mx2_videobuf_ops, pcdev->dev, + &pcdev->lock, V4L2_BUF_TYPE_VIDEO_CAPTURE, + V4L2_FIELD_NONE, sizeof(struct mx2_buffer), icd); +} + +#define MX2_BUS_FLAGS (SOCAM_DATAWIDTH_8 | \ + SOCAM_MASTER | \ + SOCAM_VSYNC_ACTIVE_HIGH | \ + SOCAM_VSYNC_ACTIVE_LOW | \ + SOCAM_HSYNC_ACTIVE_HIGH | \ + SOCAM_HSYNC_ACTIVE_LOW | \ + SOCAM_PCLK_SAMPLE_RISING | \ + SOCAM_PCLK_SAMPLE_FALLING | \ + SOCAM_DATA_ACTIVE_HIGH | \ + SOCAM_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 void mx27_camera_emma_buf_init(struct soc_camera_device *icd, + int bytesperline) +{ + struct soc_camera_host *ici = + to_soc_camera_host(icd->dev.parent); + struct mx2_camera_dev *pcdev = ici->priv; + + writel(pcdev->discard_buffer_dma, + pcdev->base_emma + PRP_DEST_RGB1_PTR); + writel(pcdev->discard_buffer_dma, + pcdev->base_emma + PRP_DEST_RGB2_PTR); + + /* + * We only use the EMMA engine to get rid of the broken + * DMA Engine. No color space consversion at the moment. + * We adjust incoming and outgoing pixelformat to rgb16 + * and adjust the bytesperline accordingly. + */ + writel(PRP_CNTL_CH1EN | + PRP_CNTL_CSIEN | + PRP_CNTL_DATA_IN_RGB16 | + PRP_CNTL_CH1_OUT_RGB16 | + PRP_CNTL_CH1_LEN | + PRP_CNTL_CH1BYP | + PRP_CNTL_CH1_TSKIP(0) | + PRP_CNTL_IN_TSKIP(0), + pcdev->base_emma + PRP_CNTL); + + writel(((bytesperline >> 1) << 16) | icd->user_height, + pcdev->base_emma + PRP_SRC_FRAME_SIZE); + writel(((bytesperline >> 1) << 16) | icd->user_height, + pcdev->base_emma + PRP_CH1_OUT_IMAGE_SIZE); + writel(bytesperline, + pcdev->base_emma + PRP_DEST_CH1_LINE_STRIDE); + writel(0x2ca00565, /* RGB565 */ + pcdev->base_emma + PRP_SRC_PIXEL_FORMAT_CNTL); + writel(0x2ca00565, /* RGB565 */ + pcdev->base_emma + PRP_CH1_PIXEL_FORMAT_CNTL); + + /* Enable interrupts */ + writel(PRP_INTR_RDERR | + PRP_INTR_CH1WERR | + PRP_INTR_CH2WERR | + PRP_INTR_CH1FC | + PRP_INTR_CH2FC | + PRP_INTR_LBOVF | + PRP_INTR_CH2OVF, + pcdev->base_emma + PRP_INTR_CNTL); +} + +static int mx2_camera_set_bus_param(struct soc_camera_device *icd, + __u32 pixfmt) +{ + struct soc_camera_host *ici = + to_soc_camera_host(icd->dev.parent); + struct mx2_camera_dev *pcdev = ici->priv; + unsigned long camera_flags, common_flags; + int ret = 0; + int bytesperline; + u32 csicr1 = pcdev->csicr1; + + camera_flags = icd->ops->query_bus_param(icd); + + common_flags = soc_camera_bus_param_compatible(camera_flags, + MX2_BUS_FLAGS); + if (!common_flags) + return -EINVAL; + + if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) && + (common_flags & SOCAM_HSYNC_ACTIVE_LOW)) { + if (pcdev->platform_flags & MX2_CAMERA_HSYNC_HIGH) + common_flags &= ~SOCAM_HSYNC_ACTIVE_LOW; + else + common_flags &= ~SOCAM_HSYNC_ACTIVE_HIGH; + } + + if ((common_flags & SOCAM_PCLK_SAMPLE_RISING) && + (common_flags & SOCAM_PCLK_SAMPLE_FALLING)) { + if (pcdev->platform_flags & MX2_CAMERA_PCLK_SAMPLE_RISING) + common_flags &= ~SOCAM_PCLK_SAMPLE_FALLING; + else + common_flags &= ~SOCAM_PCLK_SAMPLE_RISING; + } + + ret = icd->ops->set_bus_param(icd, common_flags); + if (ret < 0) + return ret; + + if (common_flags & SOCAM_PCLK_SAMPLE_FALLING) + csicr1 |= CSICR1_INV_PCLK; + if (common_flags & SOCAM_VSYNC_ACTIVE_HIGH) + csicr1 |= CSICR1_SOF_POL; + if (common_flags & SOCAM_HSYNC_ACTIVE_HIGH) + csicr1 |= CSICR1_HSYNC_POL; + if (pcdev->platform_flags & MX2_CAMERA_SWAP16) + csicr1 |= CSICR1_SWAP16_EN; + 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; + if (pcdev->platform_flags & MX2_CAMERA_PACK_DIR_MSB) + csicr1 |= CSICR1_PACK_DIR; + + pcdev->csicr1 = csicr1; + + bytesperline = soc_mbus_bytes_per_line(icd->user_width, + icd->current_fmt->host_fmt); + if (bytesperline < 0) + return bytesperline; + + if (mx27_camera_emma(pcdev)) { + ret = mx27_camera_emma_prp_reset(pcdev); + if (ret) + return ret; + + if (pcdev->discard_buffer) + dma_free_coherent(ici->v4l2_dev.dev, + pcdev->discard_size, pcdev->discard_buffer, + pcdev->discard_buffer_dma); + + /* + * 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; + + mx27_camera_emma_buf_init(icd, bytesperline); + } 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->dev.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_set_fmt(struct soc_camera_device *icd, + struct v4l2_format *f) +{ + struct soc_camera_host *ici = to_soc_camera_host(icd->dev.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; + + xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); + if (!xlate) { + dev_warn(icd->dev.parent, "Format %x not found\n", + pix->pixelformat); + return -EINVAL; + } + + /* eMMA can only do RGB565 */ + if (mx27_camera_emma(pcdev) && pix->pixelformat != V4L2_PIX_FMT_RGB565) + 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; + + 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; + + return 0; +} + +static int mx2_camera_try_fmt(struct soc_camera_device *icd, + struct v4l2_format *f) +{ + struct soc_camera_host *ici = to_soc_camera_host(icd->dev.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; + __u32 pixfmt = pix->pixelformat; + unsigned int width_limit; + int ret; + + xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); + if (pixfmt && !xlate) { + dev_warn(icd->dev.parent, "Format %x not found\n", pixfmt); + return -EINVAL; + } + + /* FIXME: implement MX27 limits */ + + /* eMMA can only do RGB565 */ + if (mx27_camera_emma(pcdev) && pixfmt != V4L2_PIX_FMT_RGB565) + return -EINVAL; + + /* 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 = pix->height * pix->bytesperline; + if (pix->sizeimage > (4 * 0x3ffff)) { /* CSIRXCNT limit */ + dev_warn(icd->dev.parent, + "Image size (%u) above limit\n", + pix->sizeimage); + return -EINVAL; + } + } + + /* 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; + + if (mf.field == V4L2_FIELD_ANY) + mf.field = V4L2_FIELD_NONE; + if (mf.field != V4L2_FIELD_NONE) { + dev_err(icd->dev.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; + + 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->version = MX2_CAM_VERSION_CODE; + cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; + + return 0; +} + +static int mx2_camera_reqbufs(struct soc_camera_file *icf, + struct v4l2_requestbuffers *p) +{ + int i; + + for (i = 0; i < p->count; i++) { + struct mx2_buffer *buf = container_of(icf->vb_vidq.bufs[i], + struct mx2_buffer, vb); + INIT_LIST_HEAD(&buf->vb.queue); + } + + return 0; +} + +#ifdef CONFIG_MACH_MX27 +static void mx27_camera_frame_done(struct mx2_camera_dev *pcdev, int state) +{ + struct videobuf_buffer *vb; + struct mx2_buffer *buf; + unsigned long flags; + int ret; + + spin_lock_irqsave(&pcdev->lock, flags); + + if (!pcdev->active) { + dev_err(pcdev->dev, "%s called with no active buffer!\n", + __func__); + goto out; + } + + vb = &pcdev->active->vb; + buf = container_of(vb, struct mx2_buffer, vb); + WARN_ON(list_empty(&vb->queue)); + dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, + vb, vb->baddr, vb->bsize); + + /* _init is used to debug races, see comment in pxa_camera_reqbufs() */ + list_del_init(&vb->queue); + vb->state = state; + do_gettimeofday(&vb->ts); + vb->field_count++; + + wake_up(&vb->done); + + if (list_empty(&pcdev->capture)) { + pcdev->active = NULL; + goto out; + } + + pcdev->active = list_entry(pcdev->capture.next, + struct mx2_buffer, vb.queue); + + vb = &pcdev->active->vb; + vb->state = VIDEOBUF_ACTIVE; + + ret = imx_dma_setup_single(pcdev->dma, videobuf_to_dma_contig(vb), + vb->size, (u32)pcdev->base_dma + 0x10, DMA_MODE_READ); + + if (ret) { + vb->state = VIDEOBUF_ERROR; + pcdev->active = NULL; + wake_up(&vb->done); + } + +out: + spin_unlock_irqrestore(&pcdev->lock, flags); +} + +static void mx27_camera_dma_err_callback(int channel, void *data, int err) +{ + struct mx2_camera_dev *pcdev = data; + + mx27_camera_frame_done(pcdev, VIDEOBUF_ERROR); +} + +static void mx27_camera_dma_callback(int channel, void *data) +{ + struct mx2_camera_dev *pcdev = data; + + mx27_camera_frame_done(pcdev, VIDEOBUF_DONE); +} + +#define DMA_REQ_CSI_RX 31 /* FIXME: Add this to a resource */ + +static int __devinit mx27_camera_dma_init(struct platform_device *pdev, + struct mx2_camera_dev *pcdev) +{ + int err; + + pcdev->dma = imx_dma_request_by_prio("CSI RX DMA", DMA_PRIO_HIGH); + if (pcdev->dma < 0) { + dev_err(&pdev->dev, "%s failed to request DMA channel\n", + __func__); + return pcdev->dma; + } + + err = imx_dma_setup_handlers(pcdev->dma, mx27_camera_dma_callback, + mx27_camera_dma_err_callback, pcdev); + if (err) { + dev_err(&pdev->dev, "%s failed to set DMA callback\n", + __func__); + goto err_out; + } + + err = imx_dma_config_channel(pcdev->dma, + IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_FIFO, + IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR, + DMA_REQ_CSI_RX, 1); + if (err) { + dev_err(&pdev->dev, "%s failed to config DMA channel\n", + __func__); + goto err_out; + } + + imx_dma_config_burstlen(pcdev->dma, 64); + + return 0; + +err_out: + imx_dma_free(pcdev->dma); + + return err; +} +#endif /* CONFIG_MACH_MX27 */ + +static unsigned int mx2_camera_poll(struct file *file, poll_table *pt) +{ + struct soc_camera_file *icf = file->private_data; + + return videobuf_poll_stream(file, &icf->vb_vidq, 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, + .try_fmt = mx2_camera_try_fmt, + .init_videobuf = mx2_camera_init_videobuf, + .reqbufs = mx2_camera_reqbufs, + .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, int state) +{ + struct mx2_buffer *buf; + struct videobuf_buffer *vb; + unsigned long phys; + + if (!list_empty(&pcdev->active_bufs)) { + buf = list_entry(pcdev->active_bufs.next, + struct mx2_buffer, vb.queue); + + BUG_ON(buf->bufnum != bufnum); + + vb = &buf->vb; +#ifdef DEBUG + phys = videobuf_to_dma_contig(vb); + if (readl(pcdev->base_emma + PRP_DEST_RGB1_PTR + 4 * bufnum) + != phys) { + dev_err(pcdev->dev, "%p != %p\n", phys, + readl(pcdev->base_emma + + PRP_DEST_RGB1_PTR + + 4 * bufnum)); + } +#endif + dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, vb, + vb->baddr, vb->bsize); + + list_del(&vb->queue); + vb->state = state; + do_gettimeofday(&vb->ts); + vb->field_count++; + + wake_up(&vb->done); + } + + if (list_empty(&pcdev->capture)) { + writel(pcdev->discard_buffer_dma, pcdev->base_emma + + PRP_DEST_RGB1_PTR + 4 * bufnum); + return; + } + + buf = list_entry(pcdev->capture.next, + struct mx2_buffer, vb.queue); + + buf->bufnum = bufnum; + + list_move_tail(pcdev->capture.next, &pcdev->active_bufs); + + vb = &buf->vb; + vb->state = VIDEOBUF_ACTIVE; + + phys = videobuf_to_dma_contig(vb); + writel(phys, pcdev->base_emma + PRP_DEST_RGB1_PTR + 4 * 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_buffer *buf; + + if (status & (1 << 7)) { /* overflow */ + u32 cntl; + /* + * We only disable channel 1 here since this is the only + * enabled channel + * + * FIXME: the correct DMA overflow handling should be resetting + * the buffer, returning an error frame, and continuing with + * the next one. + */ + cntl = readl(pcdev->base_emma + PRP_CNTL); + writel(cntl & ~PRP_CNTL_CH1EN, pcdev->base_emma + PRP_CNTL); + writel(cntl, pcdev->base_emma + PRP_CNTL); + } + if ((status & (3 << 5)) == (3 << 5) + && !list_empty(&pcdev->active_bufs)) { + /* + * Both buffers have triggered, process the one we're expecting + * to first + */ + buf = list_entry(pcdev->active_bufs.next, + struct mx2_buffer, vb.queue); + mx27_camera_frame_done_emma(pcdev, buf->bufnum, VIDEOBUF_DONE); + status &= ~(1 << (6 - buf->bufnum)); /* mark processed */ + } + if (status & (1 << 6)) + mx27_camera_frame_done_emma(pcdev, 0, VIDEOBUF_DONE); + if (status & (1 << 5)) + mx27_camera_frame_done_emma(pcdev, 1, VIDEOBUF_DONE); + + 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 = clk_get(NULL, "emma"); + if (IS_ERR(pcdev->clk_emma)) { + err = PTR_ERR(pcdev->clk_emma); + goto exit_free_irq; + } + + clk_enable(pcdev->clk_emma); + + err = mx27_camera_emma_prp_reset(pcdev); + if (err) + goto exit_clk_emma_put; + + return err; + +exit_clk_emma_put: + clk_disable(pcdev->clk_emma); + clk_put(pcdev->clk_emma); +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; + irq_handler_t mx2_cam_irq_handler = cpu_is_mx25() ? mx25_camera_irq + : mx27_camera_irq; + 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, NULL); + if (IS_ERR(pcdev->clk_csi)) { + err = PTR_ERR(pcdev->clk_csi); + goto exit_kfree; + } + + dev_dbg(&pdev->dev, "Camera clock frequency: %ld\n", + clk_get_rate(pcdev->clk_csi)); + + /* Initialize DMA */ +#ifdef CONFIG_MACH_MX27 + if (cpu_is_mx27()) { + err = mx27_camera_dma_init(pdev, pcdev); + if (err) + goto exit_clk_put; + } +#endif /* CONFIG_MACH_MX27 */ + + 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); + 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; + + err = request_irq(pcdev->irq_csi, mx2_cam_irq_handler, 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 >= 0) { + dev_info(&pdev->dev, "Using EMMA\n"); + pcdev->use_emma = 1; + 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; + err = soc_camera_host_register(&pcdev->soc_host); + if (err) + goto exit_free_emma; + + return 0; + +exit_free_emma: + if (mx27_camera_emma(pcdev)) { + free_irq(pcdev->irq_emma, pcdev); + clk_disable(pcdev->clk_emma); + clk_put(pcdev->clk_emma); + iounmap(pcdev->base_emma); + release_mem_region(res_emma->start, resource_size(res_emma)); + } +exit_free_irq: + 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: +#ifdef CONFIG_MACH_MX27 + if (cpu_is_mx27()) + imx_dma_free(pcdev->dma); +exit_clk_put: + clk_put(pcdev->clk_csi); +#endif /* CONFIG_MACH_MX27 */ +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); +#ifdef CONFIG_MACH_MX27 + if (cpu_is_mx27()) + imx_dma_free(pcdev->dma); +#endif /* CONFIG_MACH_MX27 */ + free_irq(pcdev->irq_csi, pcdev); + if (mx27_camera_emma(pcdev)) + free_irq(pcdev->irq_emma, pcdev); + + soc_camera_host_unregister(&pcdev->soc_host); + + iounmap(pcdev->base_csi); + + if (mx27_camera_emma(pcdev)) { + clk_disable(pcdev->clk_emma); + clk_put(pcdev->clk_emma); + 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"); |