- 根目录:
- drivers
- media
- video
- mx2_camera.c
/*
* 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-core.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);
if (*fb_active == NULL)
goto out;
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;
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, 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 VIDEOBUF_QUEUED or VIDEOBUF_ACTIVE
*/
videobuf_waiton(vq, 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 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 (vb->state == VIDEOBUF_QUEUED) {
list_del(&vb->queue);
vb->state = VIDEOBUF_ERROR;
} else if (cpu_is_mx25() && vb->state == VIDEOBUF_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);
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, &icd->video_lock);
}
#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 set the incomming and outgoing pixelformat to an
* 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.
*/
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_RISING)
csicr1 |= CSICR1_REDGE;
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 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;
}
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 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 */
/* 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_device *icd,
struct v4l2_requestbuffers *p)
{
int i;
for (i = 0; i < p->count; i++) {
struct mx2_buffer *buf = container_of(icd->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_device *icd = file->private_data;
return videobuf_poll_stream(file, &icd->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;
dev_info(&pdev->dev, "MX2 Camera (CSI) driver probed, clock frequency: %ld\n",
clk_get_rate(pcdev->clk_csi));
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");