From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx1.redhat.com (ext-mx07.extmail.prod.ext.phx2.redhat.com [10.5.110.11]) by int-mx05.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id o298nAfL031548 for ; Tue, 9 Mar 2010 03:49:10 -0500 Received: from gateway.tuioptics.com (gateway.tuioptics.com [213.183.22.85]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id o298mrJE023806 for ; Tue, 9 Mar 2010 03:48:55 -0500 Received: from tomcat.toptica.com (localhost [127.0.0.1]) by gateway.tuioptics.com (8.13.6/8.13.6/SuSE Linux 0.8) with ESMTP id o298mr3Z007492 for ; Tue, 9 Mar 2010 09:48:53 +0100 Date: Tue, 9 Mar 2010 09:46:26 +0100 From: Arno Euteneuer To: video4linux-list@redhat.com Message-ID: <4B960AE2.3090803@toptica.com> Subject: soc-camera driver for i.MX25 MIME-Version: 1.0 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: video4linux-list-bounces@redhat.com Errors-To: video4linux-list-bounces@redhat.com List-ID: Hi, I wrote a soc-camera driver for the i.MX25 which seems to work well on my setup with a monochrome mt9m001 camera chip if I use the full resolution of 10bits x 1280 x 1024 and up to three buffers. However, reducing the frame size to e.g. 640 x 480 leads to corrupted pictures sometimes when using multiple buffers. Using only one buffer for single shots seems to work always. Unfortunately for my application I don't need streaming at all and single shots is all I need, which is why I will have to stop working on this topic soon and focus on my user space problem again. Furthermore I will not be able to test it with other camera chips. Nevertheless I would like to contribute my work. Maybe somebody is interested or even is able to improve it. The patch is against kernel 2.6.31 (sorry). Regards, Arno diff --git a/arch/arm/plat-mxc/include/mach/memory.h b/arch/arm/plat-mxc/include/mach/memory.h index 6065e00..5cb9ac1 100644 --- a/arch/arm/plat-mxc/include/mach/memory.h +++ b/arch/arm/plat-mxc/include/mach/memory.h @@ -22,6 +22,8 @@ #endif #elif defined CONFIG_ARCH_MX3 #define PHYS_OFFSET UL(0x80000000) +#elif defined CONFIG_ARCH_MX25 +#define PHYS_OFFSET UL(0x80000000) #endif #if defined(CONFIG_MX1_VIDEO) @@ -40,4 +42,12 @@ #define CONSISTENT_DMA_SIZE SZ_8M #endif /* CONFIG_MX3_VIDEO */ +#if defined(CONFIG_MX25_VIDEO) +/* + * Increase size of DMA-consistent memory region. + * This is required for mx25 camera driver to capture at least two QXGA frames. + */ +#define CONSISTENT_DMA_SIZE SZ_8M +#endif /* CONFIG_MX25_VIDEO */ + #endif /* __ASM_ARCH_MXC_MEMORY_H__ */ diff --git a/arch/arm/plat-mxc/include/mach/mx25_camera.h b/arch/arm/plat-mxc/include/mach/mx25_camera.h new file mode 100644 index 0000000..3dc3219 --- /dev/null +++ b/arch/arm/plat-mxc/include/mach/mx25_camera.h @@ -0,0 +1,39 @@ +/* + * mx25_camera.h - i.MX25 driver header file + * Copyright (C) 2009, Arno Euteneuer + * + * Based on i.MXL/i.MXL camera (CSI) host driver + * Copyright (c) 2008, Paulius Zaleckas + * Copyright (C) 2009, Darius Augulis + * + * Based on PXA camera.h file: + * Copyright (C) 2003, Intel Corporation + * Copyright (C) 2008, Guennadi Liakhovetski + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef __ASM_ARCH_CAMERA_H_ +#define __ASM_ARCH_CAMERA_H_ + +#define MX25_CAMERA_DATA_HIGH 1 +#define MX25_CAMERA_PCLK_RISING 2 +#define MX25_CAMERA_VSYNC_HIGH 4 +#define MX25_CAMERA_DATAWIDTH_8 8 +#define MX25_CAMERA_DATAWIDTH_10 16 +#define MX25_CAMERA_DATAWIDTH_16 32 + + +/** + * struct mx1_camera_pdata - i.MX25/i.MXL camera platform data + * @mclk_10khz: master clock frequency in 10kHz units + * @flags: MX25 camera platform flags + */ +struct mx25_camera_pdata { + unsigned long mclk_10khz; + unsigned long flags; +}; + +#endif /* __ASM_ARCH_CAMERA_H_ */ diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig index dcf9fa9..c81285e 100644 --- a/drivers/media/video/Kconfig +++ b/drivers/media/video/Kconfig @@ -784,6 +784,18 @@ config VIDEO_MX1 ---help--- This is a v4l2 driver for the i.MX1/i.MXL CMOS Sensor Interface + +config MX25_VIDEO + bool + +config VIDEO_MX25 + tristate "i.MX25 CMOS Sensor Interface driver" + depends on VIDEO_DEV && ARCH_MX25 && SOC_CAMERA + select VIDEOBUF_DMA_CONTIG + select MX25_VIDEO + ---help--- + This is a v4l2 driver for the i.MX25 CMOS Sensor Interface + config MX3_VIDEO bool diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile index 9f2e321..3b992af 100644 --- a/drivers/media/video/Makefile +++ b/drivers/media/video/Makefile @@ -150,6 +150,7 @@ obj-$(CONFIG_SOC_CAMERA) += soc_camera.o obj-$(CONFIG_SOC_CAMERA_PLATFORM) += soc_camera_platform.o # soc-camera host drivers have to be linked after camera drivers obj-$(CONFIG_VIDEO_MX1) += mx1_camera.o +obj-$(CONFIG_VIDEO_MX25) += mx25_camera.o obj-$(CONFIG_VIDEO_MX3) += mx3_camera.o obj-$(CONFIG_VIDEO_PXA27x) += pxa_camera.o obj-$(CONFIG_VIDEO_SH_MOBILE_CEU) += sh_mobile_ceu_camera.o diff --git a/drivers/media/video/mx25_camera.c b/drivers/media/video/mx25_camera.c new file mode 100644 index 0000000..0a7a91a --- /dev/null +++ b/drivers/media/video/mx25_camera.c @@ -0,0 +1,925 @@ +/* + * V4L2 Driver for i.MX25 camera (CSI) host + * + * Copyright (C) 2009, Arno Euteneuer + * + * Based on i.MXL/i.MXL camera (CSI) host driver + * Copyright (C) 2008, Paulius Zaleckas + * Copyright (C) 2009, Darius Augulis + * + * Based on PXA SoC camera driver + * Copyright (C) 2006, Sascha Hauer, Pengutronix + * Copyright (C) 2008, Guennadi Liakhovetski + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#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 + + +/* + * CSI registers + */ +#define CSICR1 0x00 /* CSI Control Register 1 */ +#define CSICR2 0x04 /* CSI Control Register 2 */ +#define CSICR3 0x08 /* CSI Control Register 3 */ +#define CSIRXR 0x10 /* CSI RxFIFO Register */ +#define CSIRXCNT 0x14 +#define CSISR 0x18 /* CSI Status Register */ + +#define CSIDMASA_FB1 0x28 /* framebuffer FB1 start address */ +#define CSIDMASA_FB2 0x2c +#define CSIFBUF_PARA 0x30 /* framebuffer stride register */ +#define CSIIMAG_PARA 0x34 /* frame size register for DMA */ + +#define CSICR1_EOF_INT_EN (1 << 29) +#define CSICR1_RXFF_INTEN (1 << 18) +#define CSICR1_SOF_POL (1 << 17) +#define CSICR1_SOF_INTEN (1 << 16) +#define CSICR1_MCLKDIV(x) (((x) & 0xf) << 12) +#define CSICR1_HSYNC_POL (1 << 11) +#define CSICR1_MCLKEN (1 << 9) +#define CSICR1_FCC (1 << 8) +#define CSICR1_BIG_ENDIAN (1 << 7) +#define CSICR1_CLR_RXFIFO (1 << 5) +#define CSICR1_GCLK_MODE (1 << 4) +#define CSICR1_DATA_POL (1 << 2) +#define CSICR1_REDGE (1 << 1) +#define CSICR1_PIXEL_BIT (1 << 0) + +#define CSISR_SFF_OR_INT (1 << 25) +#define CSISR_RFF_OR_INT (1 << 24) +#define CSISR_DMA_TSF_DONE_SFF (1 << 22) +#define CSISR_STATFF_INT (1 << 21) +#define CSISR_DMA_TSF_DONE_FB2 (1 << 20) +#define CSISR_DMA_TSF_DONE_FB1 (1 << 19) +#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_HRESP_ERR_INT (1 << 7) +#define CSISR_ECC_INT (1 << 1) +#define CSISR_DRDY (1 << 0) + +#define CSICR2_DMA_BURST_TYPE_RFF 30 +#define DMA_BURST_TYPE_MASK (3 << CSICR2_DMA_BURST_TYPE_RFF) +#define DMA_BURST_TYPE_INCR8 (0 << CSICR2_DMA_BURST_TYPE_RFF) +#define DMA_BURST_TYPE_INCR4 (1 << CSICR2_DMA_BURST_TYPE_RFF) +#define DMA_BURST_TYPE_INCR16 (3 << CSICR2_DMA_BURST_TYPE_RFF) + +#define CSICR3_FRMCNT_RST (1 << 15) +#define CSICR3_DMA_REFLASH_RFF (1 << 14) +#define CSICR3_DMA_REQ_EN_RFF (1 << 12) +#define CSICR3_DMA_REQ_EN_SFF (1 << 11) +#define CSICR3_16BIT_SENSOR (1 << 3) +#define CSICR3_RXFF_LEVEL(x) (((x) & 0x07) << 4) + + + + +#define VERSION_CODE KERNEL_VERSION(0, 0, 1) +#define DRIVER_NAME "mx25-camera" + +#define CSI_IRQ_MASK (CSISR_SFF_OR_INT | CSISR_RFF_OR_INT \ + | CSISR_DMA_TSF_DONE_SFF | CSISR_STATFF_INT \ + | CSISR_DMA_TSF_DONE_FB2 | CSISR_DMA_TSF_DONE_FB1 \ + | CSISR_RXFF_INT | CSISR_EOF_INT \ + | CSISR_SOF_INT | CSISR_F2_INT \ + | CSISR_F1_INT | CSISR_COF_INT \ + | CSISR_HRESP_ERR_INT | CSISR_ECC_INT) + +#define CSI_BUS_FLAGS (SOCAM_MASTER \ + | SOCAM_HSYNC_ACTIVE_HIGH \ + | SOCAM_VSYNC_ACTIVE_HIGH \ + | SOCAM_VSYNC_ACTIVE_LOW \ + | SOCAM_PCLK_SAMPLE_RISING \ + | SOCAM_PCLK_SAMPLE_FALLING \ + | SOCAM_DATA_ACTIVE_HIGH \ + | SOCAM_DATA_ACTIVE_LOW \ + | SOCAM_DATAWIDTH_8 | SOCAM_DATAWIDTH_10 \ + | SOCAM_DATAWIDTH_16) + +#define MAX_VIDEO_MEM 8 /* Video memory limit in megabytes */ +/* see /arch/arm/plat-mxc/include/mach/memory.h */ + +/* buffer for one video frame */ +struct mx25_buffer { + /* common v4l buffer stuff -- must be first */ + struct videobuf_buffer vb; + const struct soc_camera_data_format *fmt; +}; + +/* i.MX25 is only supposed to handle one camera on its Camera Sensor + * Interface. If anyone ever builds hardware to enable more than + * one camera, they will have to modify this driver too */ +struct mx25_camera_dev { + struct soc_camera_host soc_host; + struct soc_camera_device *icd; + struct mx25_camera_pdata *pdata; + struct mx25_buffer *active; + struct resource *res; + struct clk *clk; + struct list_head capture; + + void __iomem *base; + void __iomem *csicr1; + void __iomem *csicr2; + void __iomem *csicr3; + void __iomem *csisr; + unsigned int irq; + unsigned long mclk; + + spinlock_t lock; +}; + +/* + * Videobuf operations + */ +static int mx25_videobuf_setup(struct videobuf_queue *vq, unsigned int *count, + unsigned int *size) +{ + struct soc_camera_device *icd = vq->priv_data; + + *size = icd->width * icd->height * + ((icd->current_fmt->depth + 7) >> 3); + + if (!*count) + *count = 32; + + while (*size * *count > MAX_VIDEO_MEM * 1024 * 1024) + (*count)--; + + dev_dbg(&icd->dev, + "width=%d, height=%d, depth=%d,count=%d, size=%d\n", + icd->width, icd->height, icd->current_fmt->depth, + *count, *size); + + return 0; +} + +static void free_buffer(struct videobuf_queue *vq, struct mx25_buffer *buf) +{ + struct soc_camera_device *icd = vq->priv_data; + struct videobuf_buffer *vb = &buf->vb; + + BUG_ON(in_interrupt()); + + 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); + + vb->state = VIDEOBUF_NEEDS_INIT; +} + +static int mx25_videobuf_prepare(struct videobuf_queue *vq, + struct videobuf_buffer *vb, enum v4l2_field field) +{ + struct soc_camera_device *icd = vq->priv_data; + struct mx25_buffer *buf = container_of(vb, struct mx25_buffer, vb); + int ret; + + dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, + vb, vb->baddr, vb->bsize); + + /* Added list head initialization on alloc */ + WARN_ON(!list_empty(&vb->queue)); + + BUG_ON(NULL == icd->current_fmt); + + if (buf->fmt != icd->current_fmt || + vb->width != icd->width || + vb->height != icd->height || + vb->field != field) { + buf->fmt = icd->current_fmt; + vb->width = icd->width; + vb->height = icd->height; + vb->field = field; + vb->state = VIDEOBUF_NEEDS_INIT; + } + + vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3); + if (0 != vb->baddr && vb->bsize < vb->size) + return -EINVAL; + + 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); + return ret; +} + + +static irqreturn_t mx25_camera_irq_handler(int irq, void *dev_id) +{ + struct mx25_camera_dev *pcdev = dev_id; + struct videobuf_buffer *vb; + struct mx25_buffer *buf; + unsigned long flags; + u32 width, height, temp; + u32 fbaddr; + + /* fist check for start-of-frame in order not to miss some pixels */ + if (likely(readl(pcdev->csisr) & CSISR_SOF_INT)) { + + /* clear FIFO buffer etc. .. */ + writel((readl(pcdev->csicr1) & ~CSICR1_SOF_INTEN) + | CSICR1_CLR_RXFIFO + | CSISR_DMA_TSF_DONE_FB1 + , pcdev->csicr1); + + /* enable DMA ... */ + writel(readl(pcdev->csicr3) + | CSICR3_DMA_REQ_EN_RFF + , pcdev->csicr3); + writel(CSISR_SOF_INT, pcdev->csisr); + return IRQ_HANDLED; + } + + /* at this point the frame should be in memory */ + /* so disable DMA quickly in order not to overwrite buffer */ + + temp = readl(pcdev->csicr3); + writel(temp & ~CSICR3_DMA_REQ_EN_RFF, pcdev->csicr3); + + temp = readl(pcdev->csisr); + writel(CSISR_DMA_TSF_DONE_FB1, pcdev->csisr); + + if (!(temp & CSISR_DMA_TSF_DONE_FB1)) { + printk(KERN_INFO "%s: unexpected camera IRQ!\n", + __func__); + return IRQ_HANDLED; + } + if (!pcdev->active) { + printk(KERN_ERR "%s: DMA End IRQ with no active buffer!\n", + __func__); + return IRQ_HANDLED; + } + + temp = readl(pcdev->csicr1) & ~CSI_IRQ_MASK; + writel(temp, pcdev->csicr1); + + spin_lock_irqsave(&pcdev->lock, flags); + + vb = &pcdev->active->vb; + buf = container_of(vb, struct mx25_buffer, vb); + WARN_ON(list_empty(&vb->queue)); + + /* _init is used to debug races, see comment in pxa_camera_reqbufs() */ + list_del_init(&vb->queue); + vb->state = VIDEOBUF_DONE; + do_gettimeofday(&vb->ts); + vb->field_count++; + + wake_up(&vb->done); + + if (list_empty(&pcdev->capture)) { + /* this was the last available buffer, i.e our work is done */ + pcdev->active = NULL; + spin_unlock_irqrestore(&pcdev->lock, flags); + return IRQ_HANDLED; + } + + /* use the next available buffer */ + + pcdev->active = list_entry(pcdev->capture.next, struct mx25_buffer, + vb.queue); + + vb = &pcdev->active->vb; + vb->state = VIDEOBUF_ACTIVE; + + + /* set new frame buffer properties */ + fbaddr = videobuf_to_dma_contig(vb); + writel(fbaddr, pcdev->base + CSIDMASA_FB1); + + /* configure frame parameters for DMA */ + width = vb->width; + height = vb->height; + writel((width << 16) + height, pcdev->base + CSIIMAG_PARA); + + /* reset DMA controller */ + temp = readl(pcdev->csicr3) & ~CSICR3_DMA_REQ_EN_RFF; + temp |= CSICR3_DMA_REFLASH_RFF; + writel(temp, pcdev->csicr3); + spin_unlock_irqrestore(&pcdev->lock, flags); + + temp = readl(pcdev->csicr1); + writel(0xffffffff, pcdev->csisr); + writel(temp | CSICR1_SOF_INTEN, pcdev->csicr1); + + return IRQ_HANDLED; +} + + +static void mx25_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 mx25_camera_dev *pcdev = ici->priv; + struct mx25_buffer *buf = container_of(vb, struct mx25_buffer, vb); + unsigned long flags; + u32 width, height, temp; + u32 fbaddr; + + dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d \n", __func__, + vb, vb->baddr, vb->bsize); + + spin_lock_irqsave(&pcdev->lock, flags); + list_add_tail(&vb->queue, &pcdev->capture); + + vb->state = VIDEOBUF_ACTIVE; + + if (!pcdev->active) { + pcdev->active = buf; + + /* set frame buffer address */ + fbaddr = videobuf_to_dma_contig(vb); + + BUG_ON(fbaddr & 0x3); /* must be word aligned */ + + writel(fbaddr, pcdev->base + CSIDMASA_FB1); + + /* configure frame parameters for DMA */ + width = vb->width; + height = vb->height; + writel((width << 16) + height, pcdev->base + CSIIMAG_PARA); + + /* reset DMA controller */ + temp = readl(pcdev->csicr3) & ~CSICR3_DMA_REQ_EN_RFF; + writel(temp, pcdev->csicr3); + + temp |= CSICR3_DMA_REFLASH_RFF; + writel(temp, pcdev->csicr3); + + /* disable all CSI interrupts */ + temp = readl(pcdev->csicr1) & ~CSI_IRQ_MASK; + writel(temp, pcdev->csicr1); + + writel(0xffffffff, pcdev->csisr); + writel(temp | CSICR1_SOF_INTEN, pcdev->csicr1); + + } + spin_unlock_irqrestore(&pcdev->lock, flags); +} + + + +static void mx25_videobuf_release(struct videobuf_queue *vq, + struct videobuf_buffer *vb) +{ + struct mx25_buffer *buf = container_of(vb, struct mx25_buffer, vb); +#ifdef DEBUG + struct soc_camera_device *icd = vq->priv_data; + + dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, + vb, vb->baddr, vb->bsize); + + switch (vb->state) { + case VIDEOBUF_ACTIVE: + dev_dbg(&icd->dev, "%s (active)\n", __func__); + break; + case VIDEOBUF_QUEUED: + dev_dbg(&icd->dev, "%s (queued)\n", __func__); + break; + case VIDEOBUF_PREPARED: + dev_dbg(&icd->dev, "%s (prepared)\n", __func__); + break; + default: + dev_dbg(&icd->dev, "%s (unknown)\n", __func__); + break; + } +#endif + + free_buffer(vq, buf); +} + + +static struct videobuf_queue_ops mx25_videobuf_ops = { + .buf_setup = mx25_videobuf_setup, + .buf_prepare = mx25_videobuf_prepare, + .buf_queue = mx25_videobuf_queue, + .buf_release = mx25_videobuf_release, +}; + +static void mx25_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 mx25_camera_dev *pcdev = ici->priv; + + videobuf_queue_dma_contig_init(q, &mx25_videobuf_ops, ici->dev, + &pcdev->lock, + V4L2_BUF_TYPE_VIDEO_CAPTURE, + V4L2_FIELD_NONE, + sizeof(struct mx25_buffer), icd); +} + +static int mclk_get_divisor(struct mx25_camera_dev *pcdev) +{ + unsigned int mclk = pcdev->mclk; + unsigned long div; + unsigned long lcdclk; + + lcdclk = clk_get_rate(pcdev->clk); + + /* We verify platform_mclk_10khz != 0, so if anyone breaks it, here + * they get a nice Oops */ + div = (lcdclk / mclk) / 2; + + dev_dbg(pcdev->soc_host.dev, "System clock %lukHz, target freq %dkHz, " + "divisor %lu\n", lcdclk / 1000, mclk / 1000, div); + + return div; +} + +static void mx25_camera_activate(struct mx25_camera_dev *pcdev) +{ + unsigned int temp, csicr = 0; + int ret; + dev_dbg(pcdev->soc_host.dev, "Activate device\n"); + + ret = clk_enable(pcdev->clk); + + csicr |= CSICR1_MCLKEN | CSICR1_GCLK_MODE | CSICR1_CLR_RXFIFO; + csicr |= CSICR1_MCLKDIV(mclk_get_divisor(pcdev)); + writel(csicr, pcdev->csicr1); + + csicr = readl(pcdev->csicr3); + /* TODO: how do I choose a reasonable watermark level */ + csicr |= CSICR3_RXFF_LEVEL(4); /* 32 words */ + writel(csicr, pcdev->csicr3); + + /* FB2 address will not be used by this driver */ + /* TODO: make use of FB2 for better streaming performance */ + writel(0, pcdev->base + CSIDMASA_FB2); + + /* reset frame buffer stride */ + writel(0x00, pcdev->base + CSIFBUF_PARA); + + /* configure DMA burst type according to errata IMX25RMAD*/ + temp = readl(pcdev->csicr2) & ~DMA_BURST_TYPE_MASK; + temp |= DMA_BURST_TYPE_INCR8; + writel(temp, pcdev->csicr2); + +} + +static void mx25_camera_deactivate(struct mx25_camera_dev *pcdev) +{ + dev_dbg(pcdev->soc_host.dev, "Deactivate device\n"); + + /* disable interrupts etc. */ + writel(0, pcdev->csicr1); + + /* Stop DMA engine etc.*/ + writel(0, pcdev->base + CSICR3); + + printk(KERN_INFO "%s: clock disabled\n", __func__); + clk_disable(pcdev->clk); +} + +/* The following two functions absolutely depend on the fact, that + * there can be only one camera on i.MX25 camera sensor interface */ +static int mx25_camera_add_device(struct soc_camera_device *icd) +{ + struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); + struct mx25_camera_dev *pcdev = ici->priv; + int ret; + + if (pcdev->icd) { + ret = -EBUSY; + goto ebusy; + } + + dev_info(&icd->dev, "MX25 Camera driver attached to camera %d\n", + icd->devnum); + + mx25_camera_activate(pcdev); + ret = icd->ops->init(icd); + + if (!ret) + pcdev->icd = icd; + +ebusy: + return ret; +} + +static void mx25_camera_remove_device(struct soc_camera_device *icd) +{ + struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); + struct mx25_camera_dev *pcdev = ici->priv; + + BUG_ON(icd != pcdev->icd); + + + dev_info(&icd->dev, "MX25 Camera driver detached from camera %d\n", + icd->devnum); + + icd->ops->release(icd); + + mx25_camera_deactivate(pcdev); + + pcdev->icd = NULL; +} + +static int mx25_camera_set_crop(struct soc_camera_device *icd, + struct v4l2_rect *rect) +{ + return icd->ops->set_crop(icd, rect); +} + + + +static int mx25_camera_set_bus_param(struct soc_camera_device *icd + , __u32 pixfmt) +{ + struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); + struct mx25_camera_dev *pcdev = ici->priv; + unsigned long camera_flags, common_flags, width_flags; + unsigned int csicr; + int ret; + + const struct soc_camera_format_xlate *xlate; + + xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); + if (!xlate) { + dev_warn(ici->dev, "Format %x not found\n", pixfmt); + return -EINVAL; + } + + camera_flags = icd->ops->query_bus_param(icd); + + common_flags = soc_camera_bus_param_compatible(camera_flags, + CSI_BUS_FLAGS); + if (!common_flags) + return -EINVAL; + + /* Make choises, based on platform choice */ + if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) && + (common_flags & SOCAM_VSYNC_ACTIVE_LOW)) { + if (!pcdev->pdata || + pcdev->pdata->flags & MX25_CAMERA_VSYNC_HIGH) + common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW; + else + common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH; + } + + if ((common_flags & SOCAM_PCLK_SAMPLE_RISING) && + (common_flags & SOCAM_PCLK_SAMPLE_FALLING)) { + if (!pcdev->pdata || + pcdev->pdata->flags & MX25_CAMERA_PCLK_RISING) + common_flags &= ~SOCAM_PCLK_SAMPLE_FALLING; + else + common_flags &= ~SOCAM_PCLK_SAMPLE_RISING; + } + + if ((common_flags & SOCAM_DATA_ACTIVE_HIGH) && + (common_flags & SOCAM_DATA_ACTIVE_LOW)) { + if (!pcdev->pdata || + pcdev->pdata->flags & MX25_CAMERA_DATA_HIGH) + common_flags &= ~SOCAM_DATA_ACTIVE_LOW; + else + common_flags &= ~SOCAM_DATA_ACTIVE_HIGH; + } + + width_flags = common_flags & SOCAM_DATAWIDTH_MASK; + + switch (xlate->host_fmt->depth) { + case 8: + width_flags &= SOCAM_DATAWIDTH_8; + break; + case 10: + width_flags &= SOCAM_DATAWIDTH_10; + break; + case 16: + width_flags &= SOCAM_DATAWIDTH_16; + break; + default: + width_flags = 0; + } + common_flags = (common_flags & ~SOCAM_DATAWIDTH_MASK) | + width_flags; + ret = icd->ops->set_bus_param(icd, common_flags); + if (ret < 0) + return ret; + + csicr = readl(pcdev->csicr1); + + if (common_flags & SOCAM_PCLK_SAMPLE_RISING) + csicr |= CSICR1_REDGE; + if (common_flags & SOCAM_VSYNC_ACTIVE_HIGH) + csicr |= CSICR1_SOF_POL; + if (common_flags & SOCAM_HSYNC_ACTIVE_HIGH) + csicr |= CSICR1_HSYNC_POL; + if (common_flags & SOCAM_DATA_ACTIVE_LOW) + csicr |= CSICR1_DATA_POL; + + if (common_flags & SOCAM_DATAWIDTH_10) + csicr |= CSICR1_PIXEL_BIT; + else + csicr &= ~CSICR1_PIXEL_BIT; + + writel(csicr, pcdev->csicr1); + + csicr = readl(pcdev->csicr3); + if (common_flags & SOCAM_DATAWIDTH_16) + csicr |= CSICR3_16BIT_SENSOR; + else + csicr &= ~CSICR3_16BIT_SENSOR; + + writel(csicr, pcdev->csicr3); + + return 0; +} + +static int mx25_camera_set_fmt(struct soc_camera_device *icd, + struct v4l2_format *f) +{ + struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); + const struct soc_camera_format_xlate *xlate; + struct v4l2_pix_format *pix = &f->fmt.pix; + int ret; + + xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); + if (!xlate) { + dev_warn(ici->dev, "Format %x not found\n", pix->pixelformat); + return -EINVAL; + } + + ret = icd->ops->set_fmt(icd, f); + if (!ret) { + icd->buswidth = xlate->buswidth; + icd->current_fmt = xlate->host_fmt; + } + + return ret; +} + +static int mx25_camera_try_fmt(struct soc_camera_device *icd, + struct v4l2_format *f) +{ + /* TODO: limit to mx25 hardware capabilities */ + + /* limit to sensor capabilities */ + return icd->ops->try_fmt(icd, f); +} + +static int mx25_camera_reqbufs(struct soc_camera_file *icf, + struct v4l2_requestbuffers *p) +{ + int i; + + for (i = 0; i < p->count; i++) { + struct mx25_buffer *buf = container_of(icf->vb_vidq.bufs[i], + struct mx25_buffer, vb); + INIT_LIST_HEAD(&buf->vb.queue); + } + + return 0; +} + +static unsigned int mx25_camera_poll(struct file *file, poll_table *pt) +{ + struct soc_camera_file *icf = file->private_data; + struct mx25_buffer *buf; + + buf = list_entry(icf->vb_vidq.stream.next, struct mx25_buffer, + vb.stream); + + poll_wait(file, &buf->vb.done, pt); + + if (buf->vb.state == VIDEOBUF_DONE || + buf->vb.state == VIDEOBUF_ERROR) + return POLLIN | POLLRDNORM; + + return 0; +} + +static int mx25_camera_querycap(struct soc_camera_host *ici, + struct v4l2_capability *cap) +{ + /* cap->name is set by the friendly caller:-> */ + strlcpy(cap->card, "i.MX25_Camera", sizeof(cap->card)); + cap->version = VERSION_CODE; + cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; + + return 0; +} + +static struct soc_camera_host_ops mx25_soc_camera_host_ops = { + .owner = THIS_MODULE, + .add = mx25_camera_add_device, + .remove = mx25_camera_remove_device, + .set_bus_param = mx25_camera_set_bus_param, + .set_crop = mx25_camera_set_crop, + .set_fmt = mx25_camera_set_fmt, + .try_fmt = mx25_camera_try_fmt, + .init_videobuf = mx25_camera_init_videobuf, + .reqbufs = mx25_camera_reqbufs, + .poll = mx25_camera_poll, + .querycap = mx25_camera_querycap, +}; + + +static int __init mx25_camera_probe(struct platform_device *pdev) +{ + struct mx25_camera_dev *pcdev; + struct resource *res; + struct clk *clk; + void __iomem *base; + unsigned int irq; + int err = 0; + + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + irq = platform_get_irq(pdev, 0); + if (!res || !irq) { + printk(KERN_ERR "device problem: resource :%lx irq:%d\n" + , (long unsigned int) res, irq); + err = -ENODEV; + goto exit; + } + + clk = clk_get(&pdev->dev, NULL); + if (IS_ERR(clk)) { + err = PTR_ERR(clk); + goto exit; + } + + pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL); + if (!pcdev) { + dev_err(&pdev->dev, "Could not allocate pcdev\n"); + err = -ENOMEM; + goto exit_put_clk; + } + + pcdev->res = res; + pcdev->clk = clk; + + pcdev->pdata = pdev->dev.platform_data; + + if (pcdev->pdata) + pcdev->mclk = pcdev->pdata->mclk_10khz * 10000; + + if (!pcdev->mclk) { + dev_warn(&pdev->dev, + "mclk_10khz == 0! Please, fix your platform data. " + "Using default 20MHz\n"); + pcdev->mclk = 20000000; + } + + INIT_LIST_HEAD(&pcdev->capture); + spin_lock_init(&pcdev->lock); + + /* + * Request the regions. + */ + if (!request_mem_region(res->start, resource_size(res), DRIVER_NAME)) { + err = -EBUSY; + goto exit_kfree; + } + + base = ioremap(res->start, resource_size(res)); + if (!base) { + err = -ENOMEM; + goto exit_release; + } + pcdev->irq = irq; + pcdev->base = base; + pcdev->csicr1 = base + CSICR1; + pcdev->csicr2 = base + CSICR2; + pcdev->csicr3 = base + CSICR3; + pcdev->csisr = base + CSISR; + + err = request_irq(irq, mx25_camera_irq_handler, 0 , DRIVER_NAME, pcdev); + if (err) { + dev_err(&pdev->dev, "can't get irq%d: %d\n", irq, err); + goto exit_iounmap; + } + + pcdev->soc_host.drv_name = DRIVER_NAME; + pcdev->soc_host.ops = &mx25_soc_camera_host_ops; + pcdev->soc_host.priv = pcdev; + pcdev->soc_host.dev = &pdev->dev; + pcdev->soc_host.nr = pdev->id; + err = soc_camera_host_register(&pcdev->soc_host); + if (err) + goto exit_iounmap; + + dev_info(&pdev->dev, "MX25 Camera driver loaded\n"); + + return 0; + +exit_iounmap: + iounmap(base); +exit_release: + release_mem_region(res->start, resource_size(res)); +exit_kfree: + kfree(pcdev); +exit_put_clk: + clk_put(clk); +exit: + return err; +} + +static int __exit mx25_camera_remove(struct platform_device *pdev) +{ + struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev); + struct mx25_camera_dev *pcdev = container_of(soc_host, + struct mx25_camera_dev, soc_host); + struct resource *res; + u32 csicr; + + free_irq(pcdev->irq, pcdev); + + /* disable interrupts */ + csicr = readl(pcdev->csicr1) & ~CSI_IRQ_MASK; + writel(csicr, pcdev->csicr1); + + /* Stop DMA engine */ + csicr = readl(pcdev->base + CSICR3) + & ~(CSICR3_DMA_REQ_EN_RFF | CSICR3_DMA_REQ_EN_SFF); + writel(csicr, pcdev->base + CSICR3); + + clk_put(pcdev->clk); + + soc_camera_host_unregister(soc_host); + + iounmap(pcdev->base); + + res = pcdev->res; + release_mem_region(res->start, resource_size(res)); + + kfree(pcdev); + + dev_info(&pdev->dev, "MX25 Camera driver unloaded\n"); + + return 0; +} + +static struct platform_driver mx25_camera_driver = { + .driver = { + .name = DRIVER_NAME, + }, + .remove = __exit_p(mx25_camera_remove), +}; + +static int __init mx25_camera_init(void) +{ + return platform_driver_probe(&mx25_camera_driver, mx25_camera_probe); +} + +static void __exit mx25_camera_exit(void) +{ + return platform_driver_unregister(&mx25_camera_driver); +} + +module_init(mx25_camera_init); +module_exit(mx25_camera_exit); + +MODULE_DESCRIPTION("i.MX25 SoC Camera Host driver"); +MODULE_AUTHOR("Arno Euteneuer "); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" DRIVER_NAME); -- video4linux-list mailing list Unsubscribe mailto:video4linux-list-request@redhat.com?subject=unsubscribe https://www.redhat.com/mailman/listinfo/video4linux-list