[E3-hacking] [RFC] [PATCH 1/6] SoC Camera: add driver for OMAP1 camera interface
Janusz Krzysztofik
jkrzyszt at tis.icnet.pl
Sun Jul 18 05:21:11 BST 2010
This is a V4L2 driver for TI OMAP1 SoC camera interface.
Two versions of the driver are provided, using either videobuf-dma-contig or
videobuf-dma-sg. The former uses less processing power, but often fails to
allocate contignuous buffer memory. The latter is free of this problem, but
generates tens of DMA interrupts per frame. Both versions work stable for me,
even under heavy load, on my OMAP1510 based Amstrad Delta videophone, that is
the oldest, least powerfull OMAP1 implementation.
The interface generally works in pass-through mode. Since input data byte
endianess can be swapped, it provides up to two v4l2 pixel formats per each of
several soc_mbus formats that have their swapped endian counterparts.
Boards using this driver can provide it with the followning information:
- if and what freqency clock is expected by an on-board camera sensor,
- what is the maximum pixel clock that should be accepted from the sensor,
- what is the polarity of the sensor provided pixel clock,
- if the interface GPIO line is connected to a sensor reset/powerdown input
and what is the input polarity.
Created and tested against linux-2.6.35-rc3 on Amstrad Delta.
Signed-off-by: Janusz Krzysztofik <jkrzyszt at tis.icnet.pl>
---
drivers/media/video/Kconfig | 14
drivers/media/video/Makefile | 1
drivers/media/video/omap1_camera.c | 1656 +++++++++++++++++++++++++++++++++++++
include/media/omap1_camera.h | 16
4 files changed, 1687 insertions(+)
--- linux-2.6.35-rc3.orig/include/media/omap1_camera.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.35-rc3/include/media/omap1_camera.h 2010-07-18 01:31:57.000000000 +0200
@@ -0,0 +1,16 @@
+#ifndef __MEDIA_OMAP1_CAMERA_H_
+#define __MEDIA_OMAP1_CAMERA_H_
+
+#define OMAP1_CAMERA_IOSIZE 0x1c
+
+struct omap1_cam_platform_data {
+ unsigned long camexclk_khz;
+ unsigned long lclk_khz_max;
+ unsigned long flags;
+};
+
+#define OMAP1_CAMERA_LCLK_RISING BIT(0)
+#define OMAP1_CAMERA_RST_LOW BIT(1)
+#define OMAP1_CAMERA_RST_HIGH BIT(2)
+
+#endif /* __MEDIA_OMAP1_CAMERA_H_ */
--- linux-2.6.35-rc3.orig/drivers/media/video/Kconfig 2010-06-26 15:55:29.000000000 +0200
+++ linux-2.6.35-rc3/drivers/media/video/Kconfig 2010-07-02 04:12:02.000000000 +0200
@@ -962,6 +962,20 @@ config VIDEO_SH_MOBILE_CEU
---help---
This is a v4l2 driver for the SuperH Mobile CEU Interface
+config VIDEO_OMAP1
+ tristate "OMAP1 Camera Interface driver"
+ depends on VIDEO_DEV && ARCH_OMAP1 && SOC_CAMERA
+ select VIDEOBUF_DMA_CONTIG if !VIDEO_OMAP1_SG
+ ---help---
+ This is a v4l2 driver for the TI OMAP1 camera interface
+
+if VIDEO_OMAP1
+config VIDEO_OMAP1_SG
+ bool "Scatter-gather mode"
+ depends on VIDEO_OMAP1 && EXPERIMENTAL
+ select VIDEOBUF_DMA_SG
+endif
+
config VIDEO_OMAP2
tristate "OMAP2 Camera Capture Interface driver"
depends on VIDEO_DEV && ARCH_OMAP2
--- linux-2.6.35-rc3.orig/drivers/media/video/Makefile 2010-06-26 15:55:29.000000000 +0200
+++ linux-2.6.35-rc3/drivers/media/video/Makefile 2010-06-26 17:28:09.000000000 +0200
@@ -165,6 +165,7 @@ obj-$(CONFIG_VIDEO_MX1) += mx1_camera.
obj-$(CONFIG_VIDEO_MX3) += mx3_camera.o
obj-$(CONFIG_VIDEO_PXA27x) += pxa_camera.o
obj-$(CONFIG_VIDEO_SH_MOBILE_CEU) += sh_mobile_ceu_camera.o
+obj-$(CONFIG_VIDEO_OMAP1) += omap1_camera.o
obj-$(CONFIG_ARCH_DAVINCI) += davinci/
--- linux-2.6.35-rc3.orig/drivers/media/video/omap1_camera.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.35-rc3/drivers/media/video/omap1_camera.c 2010-07-18 01:32:48.000000000 +0200
@@ -0,0 +1,1656 @@
+/*
+ * V4L2 SoC Camera driver for OMAP1 Camera Interface
+ *
+ * Copyright (C) 2010, Janusz Krzysztofik <jkrzyszt at tis.icnet.pl>
+ *
+ * Based on V4L2 Driver for i.MXL/i.MXL camera (CSI) host
+ * Copyright (C) 2008, Paulius Zaleckas <paulius.zaleckas at teltonika.lt>
+ * Copyright (C) 2009, Darius Augulis <augulis.darius at gmail.com>
+ *
+ * Based on PXA SoC camera driver
+ * Copyright (C) 2006, Sascha Hauer, Pengutronix
+ * Copyright (C) 2008, Guennadi Liakhovetski <kernel at pengutronix.de>
+ *
+ * Hardware specific bits initialy based on former work by Matt Callow
+ * drivers/media/video/omap/omap1510cam.c
+ * Copyright (C) 2006 Matt Callow
+ *
+ * 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 <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/version.h>
+
+#include <media/omap1_camera.h>
+#include <media/soc_camera.h>
+#include <media/soc_mediabus.h>
+#ifndef CONFIG_VIDEO_OMAP1_SG
+#include <media/videobuf-dma-contig.h>
+#else
+#include <media/videobuf-dma-sg.h>
+#endif
+
+#include <plat/dma.h>
+
+
+#define DRIVER_NAME "omap1-camera"
+#define VERSION_CODE KERNEL_VERSION(0, 0, 1)
+
+
+/*
+ * ---------------------------------------------------------------------------
+ * OMAP1 Camera Interface registers
+ * ---------------------------------------------------------------------------
+ */
+
+#define REG_CTRLCLOCK 0x00
+#define REG_IT_STATUS 0x04
+#define REG_MODE 0x08
+#define REG_STATUS 0x0C
+#define REG_CAMDATA 0x10
+#define REG_GPIO 0x14
+#define REG_PEAK_COUNTER 0x18
+
+/* CTRLCLOCK bit shifts */
+#define LCLK_EN BIT(7)
+#define DPLL_EN BIT(6)
+#define MCLK_EN BIT(5)
+#define CAMEXCLK_EN BIT(4)
+#define POLCLK BIT(3)
+#define FOSCMOD_SHIFT 0
+#define FOSCMOD_MASK (0x7 << FOSCMOD_SHIFT)
+#define FOSCMOD_12MHz 0x0
+#define FOSCMOD_6MHz 0x2
+#define FOSCMOD_9_6MHz 0x4
+#define FOSCMOD_24MHz 0x5
+#define FOSCMOD_8MHz 0x6
+
+/* IT_STATUS bit shifts */
+#define DATA_TRANSFER BIT(5)
+#define FIFO_FULL BIT(4)
+#define H_DOWN BIT(3)
+#define H_UP BIT(2)
+#define V_DOWN BIT(1)
+#define V_UP BIT(0)
+
+/* MODE bit shifts */
+#define RAZ_FIFO BIT(18)
+#define EN_FIFO_FULL BIT(17)
+#define EN_NIRQ BIT(16)
+#define THRESHOLD_SHIFT 9
+#define THRESHOLD_MASK (0x7f << THRESHOLD_SHIFT)
+#define DMA BIT(8)
+#define EN_H_DOWN BIT(7)
+#define EN_H_UP BIT(6)
+#define EN_V_DOWN BIT(5)
+#define EN_V_UP BIT(4)
+#define ORDERCAMD BIT(3)
+
+#define IRQ_MASK (EN_V_UP | EN_V_DOWN | EN_H_UP | EN_H_DOWN | \
+ EN_NIRQ | EN_FIFO_FULL)
+
+/* STATUS bit shifts */
+#define HSTATUS BIT(1)
+#define VSTATUS BIT(0)
+
+/* GPIO bit shifts */
+#define CAM_RST BIT(0)
+
+/* end of OMAP1 Camera Interface registers */
+
+
+#define SOCAM_BUS_FLAGS (SOCAM_MASTER | \
+ SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_HIGH | \
+ SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING | \
+ SOCAM_DATA_ACTIVE_HIGH | SOCAM_DATAWIDTH_8)
+
+
+#define CAM_EXCLK_6MHz 6000000
+#define CAM_EXCLK_8MHz 8000000
+#define CAM_EXCLK_9_6MHz 9600000
+#define CAM_EXCLK_12MHz 12000000
+#define CAM_EXCLK_24MHz 24000000
+
+
+#define FIFO_SIZE ((THRESHOLD_MASK >> THRESHOLD_SHIFT) + 1)
+#define FIFO_SHIFT __fls(FIFO_SIZE)
+
+#define DMA_BURST_SHIFT (1 + OMAP_DMA_DATA_BURST_4)
+#define DMA_BURST_SIZE (1 << DMA_BURST_SHIFT)
+
+#define DMA_ELEMENT_SHIFT OMAP_DMA_DATA_TYPE_S32
+#define DMA_ELEMENT_SIZE (1 << DMA_ELEMENT_SHIFT)
+
+#ifndef CONFIG_VIDEO_OMAP1_SG
+#define DMA_FRAME_SHIFT (FIFO_SHIFT - 1)
+#define MIN_BUF_COUNT 3
+#else
+#define DMA_FRAME_SHIFT DMA_BURST_SHIFT
+#define MIN_BUF_COUNT 2
+#endif
+
+#define DMA_FRAME_SIZE (1 << DMA_FRAME_SHIFT)
+#define DMA_SYNC OMAP_DMA_SYNC_FRAME
+#define THRESHOLD_LEVEL DMA_FRAME_SIZE
+
+
+#define MAX_VIDEO_MEM 4 /* arbitrary video memory limit in MB */
+
+
+/*
+ * Structures
+ */
+
+/* buffer for one video frame */
+struct omap1_cam_buf {
+ struct videobuf_buffer vb;
+ enum v4l2_mbus_pixelcode code;
+ int inwork;
+#ifdef CONFIG_VIDEO_OMAP1_SG
+ struct scatterlist *sgbuf;
+ int sgcount;
+ int bytes_left;
+ enum videobuf_state result;
+#endif
+};
+
+struct omap1_cam_dev {
+ struct soc_camera_host soc_host;
+ struct soc_camera_device *icd;
+ struct clk *clk;
+
+ unsigned int irq;
+ void __iomem *base;
+
+ int dma_ch;
+
+ struct omap1_cam_platform_data *pdata;
+ struct resource *res;
+ unsigned long pflags;
+ unsigned long camexclk;
+
+ struct list_head capture;
+
+ spinlock_t lock;
+
+ /* Pointers to DMA buffers */
+ struct omap1_cam_buf *active;
+ struct omap1_cam_buf *ready;
+
+ u32 reg_cache[OMAP1_CAMERA_IOSIZE / sizeof(u32)];
+};
+
+
+void cam_write(struct omap1_cam_dev *pcdev, u16 reg, u32 val)
+{
+ pcdev->reg_cache[reg / sizeof(u32)] = val;
+ __raw_writel(val, pcdev->base + reg);
+}
+
+int cam_read(struct omap1_cam_dev *pcdev, u16 reg, bool from_cache)
+{
+ return !from_cache ? __raw_readl(pcdev->base + reg) :
+ pcdev->reg_cache[reg / sizeof(u32)];
+}
+
+#define CAM_READ(pcdev, reg) \
+ cam_read(pcdev, REG_##reg, 0)
+#define CAM_WRITE(pcdev, reg, val) \
+ cam_write(pcdev, REG_##reg, val)
+#define CAM_READ_CACHE(pcdev, reg) \
+ cam_read(pcdev, REG_##reg, 1)
+
+/*
+ * Videobuf operations
+ */
+static int omap1_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);
+
+ if (bytes_per_line < 0)
+ return bytes_per_line;
+
+ *size = bytes_per_line * icd->user_height;
+
+ if (!*count || *count < MIN_BUF_COUNT)
+ *count = MIN_BUF_COUNT;
+
+ if (*size * *count > MAX_VIDEO_MEM * 1024 * 1024)
+ *count = (MAX_VIDEO_MEM * 1024 * 1024) / *size;
+
+ dev_dbg(icd->dev.parent,
+ "%s: count=%d, size=%d\n", __func__, *count, *size);
+
+ return 0;
+}
+
+static void free_buffer(struct videobuf_queue *vq, struct omap1_cam_buf *buf)
+{
+ struct videobuf_buffer *vb = &buf->vb;
+#ifdef CONFIG_VIDEO_OMAP1_SG
+ struct videobuf_dmabuf *dma = videobuf_to_dma(vb);
+#endif
+
+ BUG_ON(in_interrupt());
+
+ videobuf_waiton(vb, 0, 0);
+#ifndef CONFIG_VIDEO_OMAP1_SG
+ videobuf_dma_contig_free(vq, vb);
+#else
+ videobuf_dma_unmap(vq, dma);
+ videobuf_dma_free(dma);
+#endif
+
+ vb->state = VIDEOBUF_NEEDS_INIT;
+}
+
+static int omap1_videobuf_prepare(struct videobuf_queue *vq,
+ struct videobuf_buffer *vb, enum v4l2_field field)
+{
+ struct soc_camera_device *icd = vq->priv_data;
+ struct omap1_cam_buf *buf = container_of(vb, struct omap1_cam_buf, vb);
+ int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
+ icd->current_fmt->host_fmt);
+ int ret;
+
+ if (bytes_per_line < 0)
+ return bytes_per_line;
+
+ WARN_ON(!list_empty(&vb->queue));
+
+ BUG_ON(NULL == icd->current_fmt);
+
+ buf->inwork = 1;
+
+ 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;
+ }
+ buf->inwork = 0;
+
+ return 0;
+fail:
+ free_buffer(vq, buf);
+out:
+ buf->inwork = 0;
+ return ret;
+}
+
+static void set_dma_dest_params(int dma_ch, struct omap1_cam_buf *buf)
+{
+#ifndef CONFIG_VIDEO_OMAP1_SG
+ dma_addr_t dma_addr = videobuf_to_dma_contig(&buf->vb);
+ unsigned int block_size = buf->vb.size;
+#else
+ dma_addr_t dma_addr;
+ unsigned int block_size;
+
+ if (WARN_ON(!buf->sgbuf)) {
+ buf->result = VIDEOBUF_ERROR;
+ return;
+ }
+ dma_addr = sg_dma_address(buf->sgbuf);
+ if (WARN_ON(!dma_addr)) {
+ buf->sgbuf = NULL;
+ buf->result = VIDEOBUF_ERROR;
+ return;
+ }
+ block_size = sg_dma_len(buf->sgbuf);
+ if (WARN_ON(!block_size)) {
+ buf->sgbuf = NULL;
+ buf->result = VIDEOBUF_ERROR;
+ return;
+ }
+ if (unlikely(buf->bytes_left < block_size))
+ block_size = buf->bytes_left;
+ if (WARN_ON(dma_addr & (DMA_FRAME_SIZE * DMA_ELEMENT_SIZE - 1))) {
+ dma_addr = ALIGN(dma_addr, DMA_FRAME_SIZE * DMA_ELEMENT_SIZE);
+ block_size &= ~(DMA_FRAME_SIZE * DMA_ELEMENT_SIZE - 1);
+ }
+ buf->bytes_left -= block_size;
+ buf->sgcount++;
+#endif
+ omap_set_dma_dest_params(dma_ch, OMAP_DMA_PORT_EMIFF,
+ OMAP_DMA_AMODE_POST_INC, dma_addr, 0, 0);
+ omap_set_dma_transfer_params(dma_ch, OMAP_DMA_DATA_TYPE_S32,
+ DMA_FRAME_SIZE, block_size >> (DMA_FRAME_SHIFT +
+ DMA_ELEMENT_SHIFT), DMA_SYNC, 0, 0);
+}
+
+#ifdef CONFIG_VIDEO_OMAP1_SG
+static struct scatterlist *try_next_sgbuf(int dma_ch, struct omap1_cam_buf *buf)
+{
+ struct scatterlist *sgbuf;
+
+ if (likely(buf->sgbuf)) {
+
+ if (unlikely(!buf->bytes_left)) {
+ /* indicate sglist complete */
+ sgbuf = NULL;
+ } else {
+ sgbuf = sg_next(buf->sgbuf);
+ if (WARN_ON(!sgbuf)) {
+ buf->result = VIDEOBUF_ERROR;
+ } else if (WARN_ON(!sg_dma_len(sgbuf))) {
+ sgbuf = NULL;
+ buf->result = VIDEOBUF_ERROR;
+ }
+ }
+ buf->sgbuf = sgbuf;
+ } else {
+ struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb);
+
+ buf->sgbuf = sgbuf = dma->sglist;
+ if (sgbuf) {
+ buf->sgcount = 0;
+ buf->bytes_left = buf->vb.size;
+ buf->result = VIDEOBUF_DONE;
+ }
+ }
+ if (sgbuf)
+ set_dma_dest_params(dma_ch, buf);
+
+ return sgbuf;
+}
+#endif
+
+static struct omap1_cam_buf *prepare_next_vb(struct omap1_cam_dev *pcdev)
+{
+ struct omap1_cam_buf *buf;
+
+ buf = pcdev->ready;
+ if (!buf) {
+ if (list_empty(&pcdev->capture))
+ return buf;
+ buf = list_entry(pcdev->capture.next,
+ struct omap1_cam_buf, vb.queue);
+ buf->vb.state = VIDEOBUF_ACTIVE;
+ pcdev->ready = buf;
+ list_del_init(&buf->vb.queue);
+ }
+#ifndef CONFIG_VIDEO_OMAP1_SG
+ set_dma_dest_params(pcdev->dma_ch, buf);
+#else
+ buf->sgbuf = NULL;
+#endif
+ return buf;
+}
+
+static void start_capture(struct omap1_cam_dev *pcdev)
+{
+ struct omap1_cam_buf *buf = pcdev->active;
+ unsigned long ctrlclock = CAM_READ_CACHE(pcdev, CTRLCLOCK);
+ unsigned long mode = CAM_READ_CACHE(pcdev, MODE);
+
+ if (WARN_ON(!buf))
+ return;
+
+#ifndef CONFIG_VIDEO_OMAP1_SG
+ /* don't enable end of frame interrupts before capture autostart */
+ mode &= ~EN_V_DOWN;
+#endif
+ if (WARN_ON(mode & RAZ_FIFO))
+ /* clean up possibly insane reset condition */
+ CAM_WRITE(pcdev, MODE, mode &= ~RAZ_FIFO);
+
+ if (unlikely(ctrlclock & LCLK_EN))
+ /* stop pixel clock before FIFO reset */
+ CAM_WRITE(pcdev, CTRLCLOCK, ctrlclock & ~LCLK_EN);
+ /* reset FIFO */
+ CAM_WRITE(pcdev, MODE, mode | RAZ_FIFO);
+
+ omap_start_dma(pcdev->dma_ch);
+
+ /* (re)enable pixel clock */
+ CAM_WRITE(pcdev, CTRLCLOCK, ctrlclock | LCLK_EN);
+ /* release FIFO reset */
+ CAM_WRITE(pcdev, MODE, mode);
+
+#ifdef CONFIG_VIDEO_OMAP1_SG
+ try_next_sgbuf(pcdev->dma_ch, buf);
+#endif
+}
+
+static void suspend_capture(struct omap1_cam_dev *pcdev)
+{
+ unsigned long ctrlclock = CAM_READ_CACHE(pcdev, CTRLCLOCK);
+
+ CAM_WRITE(pcdev, CTRLCLOCK, ctrlclock & ~LCLK_EN);
+ omap_stop_dma(pcdev->dma_ch);
+}
+
+static void disable_capture(struct omap1_cam_dev *pcdev)
+{
+ unsigned long mode = CAM_READ_CACHE(pcdev, MODE);
+
+ CAM_WRITE(pcdev, MODE, mode & ~(IRQ_MASK | DMA));
+}
+
+static void omap1_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 omap1_cam_dev *pcdev = ici->priv;
+ struct omap1_cam_buf *buf;
+ unsigned long mode;
+
+ list_add_tail(&vb->queue, &pcdev->capture);
+ vb->state = VIDEOBUF_QUEUED;
+
+ if (pcdev->active)
+ return;
+
+ WARN_ON(pcdev->ready);
+
+ buf = prepare_next_vb(pcdev);
+ if (WARN_ON(!buf))
+ return;
+
+ pcdev->active = buf;
+ pcdev->ready = NULL;
+
+ dev_dbg(icd->dev.parent, "%s: capture not active, setup FIFO, start DMA"
+ "\n", __func__);
+ mode = CAM_READ_CACHE(pcdev, MODE) & (THRESHOLD_MASK | ORDERCAMD);
+ mode |= EN_FIFO_FULL | DMA;
+#ifndef CONFIG_VIDEO_OMAP1_SG
+ CAM_WRITE(pcdev, MODE, mode | EN_V_UP);
+#else
+ CAM_WRITE(pcdev, MODE, mode | EN_V_DOWN);
+
+ try_next_sgbuf(pcdev->dma_ch, buf);
+#endif
+ start_capture(pcdev);
+}
+
+static void omap1_videobuf_release(struct videobuf_queue *vq,
+ struct videobuf_buffer *vb)
+{
+ struct omap1_cam_buf *buf =
+ container_of(vb, struct omap1_cam_buf, vb);
+ struct soc_camera_device *icd = vq->priv_data;
+ struct device *dev = icd->dev.parent;
+
+ switch (vb->state) {
+ case VIDEOBUF_DONE:
+ dev_dbg(dev, "%s (done)\n", __func__);
+ break;
+ case VIDEOBUF_ACTIVE:
+ dev_dbg(dev, "%s (active)\n", __func__);
+ break;
+ case VIDEOBUF_QUEUED:
+ dev_dbg(dev, "%s (queued)\n", __func__);
+ break;
+ case VIDEOBUF_PREPARED:
+ dev_dbg(dev, "%s (prepared)\n", __func__);
+ break;
+ default:
+ dev_dbg(dev, "%s (unknown)\n", __func__);
+ break;
+ }
+
+ free_buffer(vq, buf);
+}
+
+static void videobuf_done(struct omap1_cam_dev *pcdev,
+ enum videobuf_state result)
+{
+ struct omap1_cam_buf *buf = pcdev->active;
+ struct videobuf_buffer *vb;
+ struct device *dev = pcdev->icd->dev.parent;
+
+ if (WARN_ON(!buf)) {
+ suspend_capture(pcdev);
+ disable_capture(pcdev);
+ return;
+ }
+
+ if (result == VIDEOBUF_ERROR)
+ suspend_capture(pcdev);
+
+ vb = &buf->vb;
+ if (waitqueue_active(&vb->done)) {
+ if (!pcdev->ready && result != VIDEOBUF_ERROR)
+ suspend_capture(pcdev);
+ vb->state = result;
+ do_gettimeofday(&vb->ts);
+ vb->field_count++;
+ wake_up(&vb->done);
+
+ pcdev->active = buf = pcdev->ready;
+ pcdev->ready = NULL;
+
+ if (!buf) {
+ result = VIDEOBUF_ERROR;
+ prepare_next_vb(pcdev);
+
+ pcdev->active = buf = pcdev->ready;
+ pcdev->ready = NULL;
+ }
+ } else if (pcdev->ready) {
+ dev_dbg(dev, "%s: nobody waiting on videobuf, swap with next\n",
+ __func__);
+ pcdev->active = pcdev->ready;
+#ifdef CONFIG_VIDEO_OMAP1_SG
+ buf->sgbuf = NULL;
+#endif
+ pcdev->ready = buf;
+
+ buf = pcdev->active;
+ } else {
+#ifndef CONFIG_VIDEO_OMAP1_SG
+ dev_dbg(dev, "%s: nobody waiting on videobuf, reuse it\n",
+ __func__);
+#else
+ if (result != VIDEOBUF_ERROR) {
+ suspend_capture(pcdev);
+ result = VIDEOBUF_ERROR;
+ }
+ prepare_next_vb(pcdev);
+#endif
+ }
+
+ if (!buf) {
+ dev_dbg(dev, "%s: no more videobufs, stop capture\n", __func__);
+ disable_capture(pcdev);
+ return;
+ }
+
+#ifdef CONFIG_VIDEO_OMAP1_SG
+ if (result == VIDEOBUF_ERROR)
+ buf->sgbuf = NULL;
+
+ try_next_sgbuf(pcdev->dma_ch, buf);
+#endif
+
+ if (result == VIDEOBUF_ERROR) {
+ dev_dbg(dev, "%s: videobuf error; reset FIFO, restart DMA\n",
+ __func__);
+ start_capture(pcdev);
+ }
+
+ prepare_next_vb(pcdev);
+}
+
+static void dma_isr(int channel, unsigned short status, void *data)
+{
+ struct omap1_cam_dev *pcdev = data;
+ struct omap1_cam_buf *buf = pcdev->active;
+ enum videobuf_state result;
+ unsigned long flags;
+
+ spin_lock_irqsave(&pcdev->lock, flags);
+
+ if (WARN_ON(!buf)) {
+ suspend_capture(pcdev);
+ disable_capture(pcdev);
+ goto out;
+ }
+
+#ifndef CONFIG_VIDEO_OMAP1_SG
+ /* videobuf complete, disable end of frame interrupt for this frame */
+ CAM_WRITE(pcdev, MODE, CAM_READ_CACHE(pcdev, MODE) & ~EN_V_DOWN);
+ result = VIDEOBUF_DONE;
+#else
+ if (buf->sgbuf) {
+ /* current sglist not complete yet */
+ try_next_sgbuf(pcdev->dma_ch, buf);
+ if (buf->sgbuf)
+ goto out;
+
+ if (buf->result != VIDEOBUF_ERROR) {
+ buf = prepare_next_vb(pcdev);
+ if (!buf)
+ goto out;
+
+ try_next_sgbuf(pcdev->dma_ch, buf);
+ goto out;
+ }
+ }
+ /* end of videobuf */
+ result = buf->result;
+#endif
+ videobuf_done(pcdev, result);
+out:
+ spin_unlock_irqrestore(&pcdev->lock, flags);
+}
+
+static irqreturn_t cam_isr(int irq, void *data)
+{
+ struct omap1_cam_dev *pcdev = data;
+ struct device *dev = pcdev->icd->dev.parent;
+ struct omap1_cam_buf *buf = pcdev->active;
+ unsigned long it_status;
+ unsigned long flags;
+
+ it_status = CAM_READ(pcdev, IT_STATUS);
+ if (!it_status)
+ return IRQ_NONE;
+
+ spin_lock_irqsave(&pcdev->lock, flags);
+
+ if (WARN_ON(!buf)) {
+ suspend_capture(pcdev);
+ disable_capture(pcdev);
+ goto out;
+ }
+
+ if (unlikely(it_status & FIFO_FULL)) {
+ dev_warn(dev, "%s: FIFO overflow\n", __func__);
+
+ } else if (it_status & V_DOWN) {
+#ifdef CONFIG_VIDEO_OMAP1_SG
+ /*
+ * if exactly 2 sgbufs of the next sglist has be used,
+ * then we are in sync
+ */
+ if (buf && buf->sgcount == 2)
+ goto out;
+#endif
+ dev_notice(dev, "%s: unexpected end of video frame\n",
+ __func__);
+
+#ifndef CONFIG_VIDEO_OMAP1_SG
+ } else if (it_status & V_UP) {
+ unsigned long mode = CAM_READ_CACHE(pcdev, MODE);
+
+ if (!(mode & EN_V_DOWN)) {
+ /* enable end of frame interrupt for current videobuf */
+ CAM_WRITE(pcdev, MODE, mode | EN_V_DOWN);
+ }
+ goto out;
+#endif
+
+ } else {
+ dev_warn(pcdev->soc_host.v4l2_dev.dev, "%s: "
+ "unhandled camera interrupt, status == 0x%lx\n",
+ __func__, it_status);
+ goto out;
+ }
+
+ videobuf_done(pcdev, VIDEOBUF_ERROR);
+out:
+ spin_unlock_irqrestore(&pcdev->lock, flags);
+ return IRQ_HANDLED;
+}
+
+static struct videobuf_queue_ops omap1_videobuf_ops = {
+ .buf_setup = omap1_videobuf_setup,
+ .buf_prepare = omap1_videobuf_prepare,
+ .buf_queue = omap1_videobuf_queue,
+ .buf_release = omap1_videobuf_release,
+};
+
+
+/*
+ * SOC Camera host operations
+ */
+
+static void sensor_reset(struct omap1_cam_dev *pcdev, bool reset)
+{
+ /* apply/release camera sensor reset if requested by platform data */
+ if (pcdev->pflags & OMAP1_CAMERA_RST_HIGH)
+ CAM_WRITE(pcdev, GPIO, reset);
+ else if (pcdev->pflags & OMAP1_CAMERA_RST_LOW)
+ CAM_WRITE(pcdev, GPIO, !reset);
+}
+
+/*
+ * The following two functions absolutely depend on the fact, that
+ * there can be only one camera on OMAP1 camera sensor interface
+ */
+static int omap1_cam_add_device(struct soc_camera_device *icd)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+ struct omap1_cam_dev *pcdev = ici->priv;
+ unsigned int ctrlclock;
+ int ret = 0;
+
+ if (pcdev->icd) {
+ ret = -EBUSY;
+ goto ebusy;
+ }
+
+ clk_enable(pcdev->clk);
+
+ /* setup sensor clock */
+ ctrlclock = CAM_READ(pcdev, CTRLCLOCK);
+ ctrlclock &= ~(CAMEXCLK_EN | MCLK_EN | DPLL_EN);
+ CAM_WRITE(pcdev, CTRLCLOCK, ctrlclock);
+
+ ctrlclock &= ~FOSCMOD_MASK;
+ switch (pcdev->camexclk) {
+ case CAM_EXCLK_6MHz:
+ ctrlclock |= CAMEXCLK_EN | FOSCMOD_6MHz;
+ break;
+ case CAM_EXCLK_8MHz:
+ ctrlclock |= CAMEXCLK_EN | FOSCMOD_8MHz | DPLL_EN;
+ break;
+ case CAM_EXCLK_9_6MHz:
+ ctrlclock |= CAMEXCLK_EN | FOSCMOD_9_6MHz | DPLL_EN;
+ break;
+ case CAM_EXCLK_12MHz:
+ ctrlclock |= CAMEXCLK_EN | FOSCMOD_12MHz;
+ break;
+ case CAM_EXCLK_24MHz:
+ ctrlclock |= CAMEXCLK_EN | FOSCMOD_24MHz | DPLL_EN;
+ default:
+ break;
+ }
+ CAM_WRITE(pcdev, CTRLCLOCK, ctrlclock & ~DPLL_EN);
+
+ /* enable clock */
+ ctrlclock |= MCLK_EN;
+ CAM_WRITE(pcdev, CTRLCLOCK, ctrlclock);
+
+ sensor_reset(pcdev, 0);
+
+ pcdev->icd = icd;
+
+ dev_info(icd->dev.parent, "OMAP1 Camera driver attached to camera %d\n",
+ icd->devnum);
+ebusy:
+ return ret;
+}
+
+static void omap1_cam_remove_device(struct soc_camera_device *icd)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+ struct omap1_cam_dev *pcdev = ici->priv;
+ unsigned long ctrlclock;
+
+ BUG_ON(icd != pcdev->icd);
+
+ suspend_capture(pcdev);
+ disable_capture(pcdev);
+
+ sensor_reset(pcdev, 1);
+
+ /* disable and release system clocks */
+ ctrlclock = CAM_READ(pcdev, CTRLCLOCK);
+ ctrlclock &= ~(MCLK_EN | DPLL_EN | CAMEXCLK_EN);
+ CAM_WRITE(pcdev, CTRLCLOCK, ctrlclock);
+
+ ctrlclock = (ctrlclock & ~FOSCMOD_MASK) | FOSCMOD_12MHz;
+ CAM_WRITE(pcdev, CTRLCLOCK, ctrlclock);
+ CAM_WRITE(pcdev, CTRLCLOCK, ctrlclock | MCLK_EN);
+
+ CAM_WRITE(pcdev, CTRLCLOCK, ctrlclock & ~MCLK_EN);
+
+ clk_disable(pcdev->clk);
+
+ pcdev->icd = NULL;
+
+ dev_info(icd->dev.parent, "OMAP1 Camera driver detached from camera %d"
+ "\n", icd->devnum);
+}
+
+/* Duplicate standard formats based on host capability of byte swapping */
+static const struct soc_mbus_pixelfmt omap1_cam_formats[] = {
+ [V4L2_MBUS_FMT_YUYV8_2X8_BE] = {
+ .fourcc = V4L2_PIX_FMT_YUYV,
+ .name = "YUYV",
+ .bits_per_sample = 8,
+ .packing = SOC_MBUS_PACKING_2X8_PADHI,
+ .order = SOC_MBUS_ORDER_BE,
+ },
+ [V4L2_MBUS_FMT_YVYU8_2X8_BE] = {
+ .fourcc = V4L2_PIX_FMT_YVYU,
+ .name = "YVYU",
+ .bits_per_sample = 8,
+ .packing = SOC_MBUS_PACKING_2X8_PADHI,
+ .order = SOC_MBUS_ORDER_BE,
+ },
+ [V4L2_MBUS_FMT_YUYV8_2X8_LE] = {
+ .fourcc = V4L2_PIX_FMT_UYVY,
+ .name = "UYVY",
+ .bits_per_sample = 8,
+ .packing = SOC_MBUS_PACKING_2X8_PADHI,
+ .order = SOC_MBUS_ORDER_BE,
+ },
+ [V4L2_MBUS_FMT_YVYU8_2X8_LE] = {
+ .fourcc = V4L2_PIX_FMT_VYUY,
+ .name = "VYUY",
+ .bits_per_sample = 8,
+ .packing = SOC_MBUS_PACKING_2X8_PADHI,
+ .order = SOC_MBUS_ORDER_BE,
+ },
+ [V4L2_MBUS_FMT_RGB555_2X8_PADHI_BE] = {
+ .fourcc = V4L2_PIX_FMT_RGB555,
+ .name = "RGB555",
+ .bits_per_sample = 8,
+ .packing = SOC_MBUS_PACKING_2X8_PADHI,
+ .order = SOC_MBUS_ORDER_BE,
+ },
+ [V4L2_MBUS_FMT_RGB555_2X8_PADHI_LE] = {
+ .fourcc = V4L2_PIX_FMT_RGB555X,
+ .name = "RGB555X",
+ .bits_per_sample = 8,
+ .packing = SOC_MBUS_PACKING_2X8_PADHI,
+ .order = SOC_MBUS_ORDER_BE,
+ },
+ [V4L2_MBUS_FMT_RGB565_2X8_BE] = {
+ .fourcc = V4L2_PIX_FMT_RGB565,
+ .name = "RGB565",
+ .bits_per_sample = 8,
+ .packing = SOC_MBUS_PACKING_2X8_PADHI,
+ .order = SOC_MBUS_ORDER_BE,
+ },
+ [V4L2_MBUS_FMT_RGB565_2X8_LE] = {
+ .fourcc = V4L2_PIX_FMT_RGB565X,
+ .name = "RGB565X",
+ .bits_per_sample = 8,
+ .packing = SOC_MBUS_PACKING_2X8_PADHI,
+ .order = SOC_MBUS_ORDER_BE,
+ },
+};
+
+static int omap1_cam_get_formats(struct soc_camera_device *icd,
+ unsigned int idx, struct soc_camera_format_xlate *xlate)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ struct device *dev = icd->dev.parent;
+ int formats = 0, ret;
+ enum v4l2_mbus_pixelcode code;
+ const struct soc_mbus_pixelfmt *fmt;
+
+ ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
+ if (ret < 0)
+ /* No more formats */
+ return 0;
+
+ fmt = soc_mbus_get_fmtdesc(code);
+ if (!fmt) {
+ dev_err(dev, "%s: invalid format code #%d: %d\n", __func__,
+ idx, code);
+ return 0;
+ }
+
+ /* Check support for the requested bits-per-sample */
+ if (fmt->bits_per_sample != 8)
+ return 0;
+
+ switch (code) {
+ case V4L2_MBUS_FMT_YUYV8_2X8_BE:
+ case V4L2_MBUS_FMT_YVYU8_2X8_BE:
+ case V4L2_MBUS_FMT_YUYV8_2X8_LE:
+ case V4L2_MBUS_FMT_YVYU8_2X8_LE:
+ case V4L2_MBUS_FMT_RGB555_2X8_PADHI_BE:
+ case V4L2_MBUS_FMT_RGB555_2X8_PADHI_LE:
+ case V4L2_MBUS_FMT_RGB565_2X8_BE:
+ case V4L2_MBUS_FMT_RGB565_2X8_LE:
+ formats++;
+ if (xlate) {
+ xlate->host_fmt = &omap1_cam_formats[code];
+ xlate->code = code;
+ xlate++;
+ dev_dbg(dev, "%s: providing format %s "
+ "as byte swapped code #%d\n", __func__,
+ omap1_cam_formats[code].name, code);
+ }
+ default:
+ if (xlate)
+ dev_dbg(dev, "%s: providing format %s "
+ "in pass-through mode\n", __func__,
+ fmt->name);
+ }
+ formats++;
+ if (xlate) {
+ xlate->host_fmt = fmt;
+ xlate->code = code;
+ xlate++;
+ }
+
+ return formats;
+}
+
+static int is_dma_aligned(s32 bytes_per_line, unsigned int height)
+{
+ int size = bytes_per_line * height;
+
+ return IS_ALIGNED(bytes_per_line, DMA_ELEMENT_SIZE) &&
+ IS_ALIGNED(size, DMA_FRAME_SIZE * DMA_ELEMENT_SIZE);
+}
+
+static int dma_align(int *width, int *height,
+ const struct soc_mbus_pixelfmt *fmt, bool enlarge)
+{
+ s32 bytes_per_line = soc_mbus_bytes_per_line(*width, fmt);
+
+ if (bytes_per_line < 0)
+ return bytes_per_line;
+
+ if (!is_dma_aligned(bytes_per_line, *height)) {
+ unsigned int pxalign = __fls(bytes_per_line / *width);
+ unsigned int salign =
+ DMA_FRAME_SHIFT + DMA_ELEMENT_SHIFT - pxalign;
+ unsigned int incr = enlarge << salign;
+
+ v4l_bound_align_image(width, DMA_ELEMENT_SIZE >> pxalign,
+ *width + incr, DMA_ELEMENT_SHIFT - pxalign,
+ height, 1, *height + incr, 0, salign);
+ return 0;
+ }
+ return 1;
+}
+
+/* returns 1 on g_crop() success, 0 on cropcap() success, <0 on error */
+static int get_crop(struct soc_camera_device *icd, struct v4l2_rect *rect)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ struct device *dev = icd->dev.parent;
+ struct v4l2_crop crop;
+ int ret;
+
+ crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ ret = v4l2_subdev_call(sd, video, g_crop, &crop);
+ if (ret == -ENOIOCTLCMD) {
+ struct v4l2_cropcap cc;
+
+ dev_dbg(dev, "%s: g_crop() missing, trying cropcap() instead"
+ "\n", __func__);
+ cc.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ ret = v4l2_subdev_call(sd, video, cropcap, &cc);
+ if (ret < 0)
+ return ret;
+ *rect = cc.defrect;
+ return 0;
+ } else if (ret < 0) {
+ return ret;
+ }
+ *rect = crop.c;
+ return 1;
+}
+
+/*
+ * returns 1 on g_mbus_fmt() or g_crop() success, 0 on cropcap() success,
+ * <0 on error
+ */
+static int get_geometry(struct soc_camera_device *icd, struct v4l2_rect *rect,
+ enum v4l2_mbus_pixelcode code)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ struct device *dev = icd->dev.parent;
+ struct v4l2_mbus_framefmt mf;
+ int ret;
+
+ ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
+ if (ret == -ENOIOCTLCMD) {
+ struct v4l2_rect c;
+
+ dev_dbg(dev, "%s: g_mbus_fmt() missing, trying g_crop() instead"
+ "\n", __func__);
+ ret = get_crop(icd, &c);
+ if (ret < 0)
+ return ret;
+ /* REVISIT:
+ * Should cropcap() obtained defrect reflect last s_crop()?
+ * Can we use it here for s_crop() result verification?
+ */
+ if (ret) {
+ *rect = c; /* use g_crop() result */
+ } else {
+ dev_warn(dev, "%s: current geometry not available\n",
+ __func__);
+ return 0;
+ }
+ } else if (ret < 0) {
+ return ret;
+ } else if (mf.code != code) {
+ return -EINVAL;
+ } else {
+ rect->width = mf.width;
+ rect->height = mf.height;
+ }
+ return 1;
+}
+
+#define subdev_call_with_sense(ret, function, args...) \
+{ \
+ struct soc_camera_sense sense = { \
+ .master_clock = pcdev->camexclk, \
+ .pixel_clock_max = 0, \
+ }; \
+\
+ if (pcdev->pdata) \
+ sense.pixel_clock_max = pcdev->pdata->lclk_khz_max * 1000; \
+ icd->sense = &sense; \
+ *(ret) = v4l2_subdev_call(sd, video, function, ##args); \
+ icd->sense = NULL; \
+\
+ if (sense.flags & SOCAM_SENSE_PCLK_CHANGED) { \
+ if (sense.pixel_clock > sense.pixel_clock_max) { \
+ dev_err(dev, "%s: " \
+ "pixel clock %lu set by the camera too high!" \
+ "\n", __func__, sense.pixel_clock); \
+ return -EIO; \
+ } \
+ } \
+}
+
+static int omap1_cam_set_crop(struct soc_camera_device *icd,
+ struct v4l2_crop *crop)
+{
+ struct v4l2_rect *rect = &crop->c;
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+ struct omap1_cam_dev *pcdev = ici->priv;
+ struct device *dev = icd->dev.parent;
+ s32 bytes_per_line;
+ int ret;
+
+ ret = dma_align(&rect->width, &rect->height, icd->current_fmt->host_fmt,
+ false);
+ if (ret < 0) {
+ dev_err(dev, "%s: failed to align %ux%u %s with DMA\n",
+ __func__, rect->width, rect->height,
+ icd->current_fmt->host_fmt->name);
+ return ret;
+ }
+
+ subdev_call_with_sense(&ret, s_crop, crop);
+ if (ret < 0) {
+ dev_warn(dev, "%s: failed to crop to %ux%u@%u:%u\n", __func__,
+ rect->width, rect->height, rect->left, rect->top);
+ return ret;
+ }
+
+ ret = get_geometry(icd, rect, icd->current_fmt->code);
+ if (ret < 0) {
+ dev_err(dev, "%s: get_geometry() failed\n", __func__);
+ return ret;
+ }
+ if (!ret) {
+ dev_warn(dev, "%s: unable to verify s_crop() results\n",
+ __func__);
+ }
+
+ bytes_per_line = soc_mbus_bytes_per_line(rect->width,
+ icd->current_fmt->host_fmt);
+ if (bytes_per_line < 0) {
+ dev_err(dev, "%s: soc_mbus_bytes_per_line() failed\n",
+ __func__);
+ return bytes_per_line;
+ }
+
+ ret = is_dma_aligned(bytes_per_line, rect->height);
+ if (ret < 0) {
+ dev_err(dev, "%s: is_dma_aligned() failed\n", __func__);
+ return ret;
+ }
+ if (!ret) {
+ dev_err(dev, "%s: resulting geometry %dx%d not DMA aligned\n",
+ __func__, rect->width, rect->height);
+ return -EINVAL;
+ }
+
+ icd->user_width = rect->width;
+ icd->user_height = rect->height;
+
+ return ret;
+}
+
+static int omap1_cam_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 device *dev = icd->dev.parent;
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+ struct omap1_cam_dev *pcdev = ici->priv;
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct v4l2_mbus_framefmt mf;
+ struct v4l2_crop crop;
+ struct v4l2_rect *rect = &crop.c;
+ int bytes_per_line;
+ int ret;
+
+ xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
+ if (!xlate) {
+ dev_warn(dev, "%s: format %x not found\n", __func__,
+ pix->pixelformat);
+ return -EINVAL;
+ }
+
+ bytes_per_line = soc_mbus_bytes_per_line(pix->width, xlate->host_fmt);
+ if (bytes_per_line < 0) {
+ dev_err(dev, "%s: soc_mbus_bytes_per_line() failed\n",
+ __func__);
+ return bytes_per_line;
+ }
+ if (pix->bytesperline && pix->bytesperline != bytes_per_line) {
+ dev_err(dev, "%s: bytes per line mismatch\n", __func__);
+ return -EINVAL;
+ }
+ ret = is_dma_aligned(bytes_per_line, pix->height);
+ if (ret < 0) {
+ dev_err(dev, "%s: is_dma_aligned() failed\n", __func__);
+ return ret;
+ }
+ if (!ret) {
+ dev_err(dev, "%s: image size %dx%d not DMA aligned\n",
+ __func__, pix->width, pix->height);
+ return -EINVAL;
+ }
+
+ mf.width = pix->width;
+ mf.height = pix->height;
+ mf.field = pix->field;
+ mf.colorspace = pix->colorspace;
+ mf.code = xlate->code;
+
+ subdev_call_with_sense(&ret, s_mbus_fmt, &mf);
+ if (ret < 0) {
+ dev_err(dev, "%s: failed to set format\n", __func__);
+ return ret;
+ }
+
+ if (mf.code != xlate->code) {
+ dev_err(dev, "%s: unexpected pixel code change\n", __func__);
+ return -EINVAL;
+ }
+ icd->current_fmt = xlate;
+
+ pix->field = mf.field;
+ pix->colorspace = mf.colorspace;
+
+ if (mf.width == pix->width && mf.height == pix->height)
+ return 0;
+
+ dev_notice(dev, "%s: sensor geometry differs, trying to crop to %dx%d"
+ "\n", __func__, pix->width, pix->height);
+ crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ ret = get_crop(icd, rect);
+ if (ret < 0) {
+ dev_err(dev, "%s: get_crop() failed\n", __func__);
+ return ret;
+ }
+
+ rect->width = pix->width;
+ rect->height = pix->height;
+
+ subdev_call_with_sense(&ret, s_crop, &crop);
+ if (ret < 0) {
+ dev_warn(dev, "%s: failed to crop to %ux%u@%u:%u\n", __func__,
+ rect->width, rect->height, rect->left, rect->top);
+ return ret;
+ }
+
+ ret = get_geometry(icd, rect, xlate->code);
+ if (ret < 0) {
+ dev_err(dev, "%s: get_geometry() failed\n", __func__);
+ return ret;
+ }
+
+ if (!ret) {
+ dev_warn(dev, "%s: s_crop() results not verified\n", __func__);
+ return 0;
+ }
+
+ if (pix->width != rect->width || pix->height != rect->height) {
+ dev_err(dev, "%s: tried to set %dx%d, got %dx%d\n", __func__,
+ pix->width, pix->height,
+ rect->width, rect->height);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int omap1_cam_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 device *dev = icd->dev.parent;
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct v4l2_mbus_framefmt mf, testmf;
+ const struct soc_mbus_pixelfmt *fmt;
+ int ret;
+
+ xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
+ if (!xlate) {
+ dev_warn(dev, "%s: format %x not found\n", __func__,
+ pix->pixelformat);
+ return -EINVAL;
+ }
+
+ fmt = xlate->host_fmt;
+ ret = dma_align(&pix->width, &pix->height, fmt, true);
+ if (ret < 0) {
+ dev_err(dev, "%s: failed to align %ux%u %s with DMA\n",
+ __func__, pix->width, pix->height, fmt->name);
+ return ret;
+ }
+
+ mf.width = pix->width;
+ mf.height = pix->height;
+ mf.field = pix->field;
+ mf.colorspace = pix->colorspace;
+ mf.code = xlate->code;
+
+ /* limit to sensor capabilities */
+ ret = v4l2_subdev_call(sd, video, try_mbus_fmt, &mf);
+ if (ret < 0) {
+ dev_err(dev, "%s: try_mbus_fmt() failed\n", __func__);
+ return ret;
+ }
+
+ pix->field = mf.field;
+ pix->colorspace = mf.colorspace;
+
+ if (mf.width == pix->width && mf.height == pix->height &&
+ mf.code == xlate->code)
+ return 0;
+
+ dev_dbg(dev, "%s: geometry changed, recheck alignment\n", __func__);
+ pix->width = mf.width;
+ pix->height = mf.height;
+
+ fmt = soc_mbus_get_fmtdesc(mf.code);
+ ret = dma_align(&pix->width, &pix->height, fmt, false);
+ if (ret < 0) {
+ dev_err(dev, "%s: failed to align %ux%u %s with DMA\n",
+ __func__, pix->width, pix->height, fmt->name);
+ return ret;
+ }
+ if (ret)
+ return 0;
+
+ testmf.width = pix->width;
+ testmf.height = pix->height;
+ testmf.field = mf.field;
+ testmf.colorspace = mf.colorspace;
+ testmf.code = mf.code;
+
+ ret = v4l2_subdev_call(sd, video, try_mbus_fmt, &testmf);
+ if (ret < 0) {
+ dev_err(dev, "%s: try_mbus_fmt() failed\n", __func__);
+ return ret;
+ }
+
+ if (testmf.code != mf.code || testmf.width != mf.width ||
+ testmf.height != mf.height) {
+ dev_err(dev, "%s: sensor format inconsistency, giving up\n",
+ __func__);
+ return -EINVAL;
+ }
+ dev_notice(dev, "%s: "
+ "sensor frame not DMA aligned, will try to crop from set_fmt()"
+ "\n", __func__);
+
+ return 0;
+}
+
+static void omap1_cam_init_videobuf(struct videobuf_queue *q,
+ struct soc_camera_device *icd)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+ struct omap1_cam_dev *pcdev = ici->priv;
+
+#ifndef CONFIG_VIDEO_OMAP1_SG
+ videobuf_queue_dma_contig_init(q, &omap1_videobuf_ops, icd->dev.parent,
+ &pcdev->lock,
+ V4L2_BUF_TYPE_VIDEO_CAPTURE,
+ V4L2_FIELD_NONE,
+ sizeof(struct omap1_cam_buf),
+ icd);
+#else
+ videobuf_queue_sg_init(q, &omap1_videobuf_ops, icd->dev.parent,
+ &pcdev->lock,
+ V4L2_BUF_TYPE_VIDEO_CAPTURE,
+ V4L2_FIELD_NONE,
+ sizeof(struct omap1_cam_buf),
+ icd);
+#endif
+}
+
+static int omap1_cam_reqbufs(struct soc_camera_file *icf,
+ struct v4l2_requestbuffers *p)
+{
+ int i;
+
+ /*
+ * This is for locking debugging only. I removed spinlocks and now I
+ * check whether .prepare is ever called on a linked buffer, or whether
+ * a dma IRQ can occur for an in-work or unlinked buffer. Until now
+ * it hadn't triggered
+ */
+ for (i = 0; i < p->count; i++) {
+ struct omap1_cam_buf *buf = container_of(icf->vb_vidq.bufs[i],
+ struct omap1_cam_buf, vb);
+ buf->inwork = 0;
+ INIT_LIST_HEAD(&buf->vb.queue);
+ }
+
+ return 0;
+}
+
+static int omap1_cam_querycap(struct soc_camera_host *ici,
+ struct v4l2_capability *cap)
+{
+ /* cap->name is set by the friendly caller:-> */
+ strlcpy(cap->card, "OMAP1 Camera", sizeof(cap->card));
+ cap->version = VERSION_CODE;
+ cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
+
+ return 0;
+}
+
+static int omap1_cam_set_bus_param(struct soc_camera_device *icd,
+ __u32 pixfmt)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+ struct omap1_cam_dev *pcdev = ici->priv;
+ struct device *dev = icd->dev.parent;
+ const struct soc_camera_format_xlate *xlate;
+ const struct soc_mbus_pixelfmt *fmt;
+ unsigned long camera_flags, common_flags;
+ unsigned int ctrlclock, mode;
+ int ret;
+
+ camera_flags = icd->ops->query_bus_param(icd);
+
+ common_flags = soc_camera_bus_param_compatible(camera_flags,
+ SOCAM_BUS_FLAGS);
+ if (!common_flags)
+ return -EINVAL;
+
+ /* Make choices, possibly based on platform configuration */
+ if ((common_flags & SOCAM_PCLK_SAMPLE_RISING) &&
+ (common_flags & SOCAM_PCLK_SAMPLE_FALLING)) {
+ if (!pcdev->pdata ||
+ pcdev->pdata->flags & OMAP1_CAMERA_LCLK_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;
+
+ ctrlclock = CAM_READ_CACHE(pcdev, CTRLCLOCK);
+ if (ctrlclock & LCLK_EN)
+ CAM_WRITE(pcdev, CTRLCLOCK, ctrlclock & ~LCLK_EN);
+
+ if (common_flags & SOCAM_PCLK_SAMPLE_RISING) {
+ dev_dbg(dev, "CTRLCLOCK_REG |= POLCLK\n");
+ ctrlclock |= POLCLK;
+ } else {
+ dev_dbg(dev, "CTRLCLOCK_REG &= ~POLCLK\n");
+ ctrlclock &= ~POLCLK;
+ }
+ CAM_WRITE(pcdev, CTRLCLOCK, ctrlclock & ~LCLK_EN);
+
+ if (ctrlclock & LCLK_EN)
+ CAM_WRITE(pcdev, CTRLCLOCK, ctrlclock);
+
+ /* select bus endianess */
+ xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
+ fmt = xlate->host_fmt;
+
+ if (fmt->order == SOC_MBUS_ORDER_LE) {
+ dev_dbg(dev, "MODE_REG &= ~ORDERCAMD\n");
+ mode = CAM_READ(pcdev, MODE) & ~ORDERCAMD;
+ } else {
+ dev_dbg(dev, "MODE_REG |= ORDERCAMD\n");
+ mode = CAM_READ(pcdev, MODE) | ORDERCAMD;
+ }
+ CAM_WRITE(pcdev, MODE, mode);
+
+ return 0;
+}
+
+static unsigned int omap1_cam_poll(struct file *file, poll_table *pt)
+{
+ struct soc_camera_file *icf = file->private_data;
+ struct omap1_cam_buf *buf;
+
+ buf = list_entry(icf->vb_vidq.stream.next, struct omap1_cam_buf,
+ 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 struct soc_camera_host_ops omap1_host_ops = {
+ .owner = THIS_MODULE,
+ .add = omap1_cam_add_device,
+ .remove = omap1_cam_remove_device,
+ .get_formats = omap1_cam_get_formats,
+ .set_crop = omap1_cam_set_crop,
+ .set_fmt = omap1_cam_set_fmt,
+ .try_fmt = omap1_cam_try_fmt,
+ .init_videobuf = omap1_cam_init_videobuf,
+ .reqbufs = omap1_cam_reqbufs,
+ .querycap = omap1_cam_querycap,
+ .set_bus_param = omap1_cam_set_bus_param,
+ .poll = omap1_cam_poll,
+};
+
+static int __init omap1_cam_probe(struct platform_device *pdev)
+{
+ struct omap1_cam_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 || (int)irq <= 0) {
+ err = -ENODEV;
+ goto exit;
+ }
+
+ clk = clk_get(&pdev->dev, "armper_ck");
+ 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;
+ pcdev->pflags = pcdev->pdata->flags;
+
+ if (pcdev->pdata)
+ pcdev->camexclk = pcdev->pdata->camexclk_khz * 1000;
+
+ switch (pcdev->camexclk) {
+ case CAM_EXCLK_6MHz:
+ case CAM_EXCLK_8MHz:
+ case CAM_EXCLK_9_6MHz:
+ case CAM_EXCLK_12MHz:
+ case CAM_EXCLK_24MHz:
+ break;
+ default:
+ dev_warn(&pdev->dev,
+ "Incorrect sensor clock frequency %ld kHz, "
+ "should be one of 0, 6, 8, 9.6, 12 or 24 MHz, "
+ "please correct your platform data\n",
+ pcdev->pdata->camexclk_khz);
+ pcdev->camexclk = 0;
+ case 0:
+ dev_info(&pdev->dev,
+ "Not providing sensor clock\n");
+ }
+
+ INIT_LIST_HEAD(&pcdev->capture);
+ spin_lock_init(&pcdev->lock);
+
+ /*
+ * Request the region.
+ */
+ 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;
+
+ /* apply reset to camera sensor if requested by platform data */
+ if (pcdev->pflags & OMAP1_CAMERA_RST_HIGH)
+ CAM_WRITE(pcdev, GPIO, 0x1);
+ else if (pcdev->pflags & OMAP1_CAMERA_RST_LOW)
+ CAM_WRITE(pcdev, GPIO, 0x0);
+
+ err = omap_request_dma(OMAP_DMA_CAMERA_IF_RX, DRIVER_NAME,
+ dma_isr, (void *)pcdev, &pcdev->dma_ch);
+ if (err < 0) {
+ dev_err(&pdev->dev, "Can't request DMA for OMAP1 Camera\n");
+ err = -EBUSY;
+ goto exit_iounmap;
+ }
+ dev_dbg(&pdev->dev, "got DMA channel %d\n", pcdev->dma_ch);
+
+ /* preconfigure DMA */
+ omap_set_dma_src_params(pcdev->dma_ch, OMAP_DMA_PORT_TIPB,
+ OMAP_DMA_AMODE_CONSTANT, res->start + REG_CAMDATA,
+ 0, 0);
+ omap_set_dma_dest_burst_mode(pcdev->dma_ch, OMAP_DMA_DATA_BURST_4);
+ /* setup DMA autoinitialization */
+ omap_dma_link_lch(pcdev->dma_ch, pcdev->dma_ch);
+
+ CAM_WRITE(pcdev, MODE, THRESHOLD_LEVEL << THRESHOLD_SHIFT);
+
+ err = request_irq(pcdev->irq, cam_isr, 0, DRIVER_NAME, pcdev);
+ if (err) {
+ dev_err(&pdev->dev, "Camera interrupt register failed\n");
+ goto exit_free_dma;
+ }
+
+ pcdev->soc_host.drv_name = DRIVER_NAME;
+ pcdev->soc_host.ops = &omap1_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_irq;
+
+ dev_info(&pdev->dev, "OMAP1 Camera Interface driver loaded\n");
+
+ return 0;
+
+exit_free_irq:
+ free_irq(pcdev->irq, pcdev);
+exit_free_dma:
+ omap_free_dma(pcdev->dma_ch);
+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 omap1_cam_remove(struct platform_device *pdev)
+{
+ struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
+ struct omap1_cam_dev *pcdev = container_of(soc_host,
+ struct omap1_cam_dev, soc_host);
+ struct resource *res;
+
+ soc_camera_host_unregister(soc_host);
+
+ free_irq(pcdev->irq, pcdev);
+
+ omap_free_dma(pcdev->dma_ch);
+
+ iounmap(pcdev->base);
+
+ res = pcdev->res;
+ release_mem_region(res->start, resource_size(res));
+
+ kfree(pcdev);
+
+ clk_put(pcdev->clk);
+
+ dev_info(&pdev->dev, "OMAP1 Camera Interface driver unloaded\n");
+
+ return 0;
+}
+
+static struct platform_driver omap1_cam_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ },
+ .probe = omap1_cam_probe,
+ .remove = __exit_p(omap1_cam_remove),
+};
+
+static int __init omap1_cam_init(void)
+{
+ return platform_driver_register(&omap1_cam_driver);
+}
+
+static void __exit omap1_cam_exit(void)
+{
+ platform_driver_unregister(&omap1_cam_driver);
+}
+
+module_init(omap1_cam_init);
+module_exit(omap1_cam_exit);
+
+MODULE_DESCRIPTION("OMAP1 Camera Interface driver");
+MODULE_AUTHOR("Janusz Krzysztofik <jkrzyszt at tis.icnet.pl>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRIVER_NAME);
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