* multifunction chip. Currently works with the Omnivision OV7670
* sensor.
*
+ * The data sheet for this device can be found at:
+ * http://www.marvell.com/products/pcconn/88ALP01.jsp
+ *
* Copyright 2006 One Laptop Per Child Association, Inc.
+ * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
*
* Written by Jonathan Corbet, corbet@lwn.net.
*
+ * v4l2_device/v4l2_subdev conversion by:
+ * Copyright (C) 2009 Hans Verkuil <hverkuil@xs4all.nl>
+ *
+ * Note: this conversion is untested! Please contact the linux-media
+ * mailinglist if you can test this, together with the test results.
+ *
* This file may be distributed under the terms of the GNU General
* Public License, version 2.
*/
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/fs.h>
+#include <linux/mm.h>
#include <linux/pci.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/videodev2.h>
-#include <media/v4l2-common.h>
+#include <linux/slab.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-chip-ident.h>
#include <linux/device.h>
#include <linux/wait.h>
#include <linux/list.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
-#include <linux/debugfs.h>
#include <linux/jiffies.h>
#include <linux/vmalloc.h>
#include "cafe_ccic-regs.h"
-#define CAFE_VERSION 0x000001
+#define CAFE_VERSION 0x000002
/*
*/
#define MAX_DMA_BUFS 3
-static int alloc_bufs_at_load = 0;
-module_param(alloc_bufs_at_load, bool, 0444);
-MODULE_PARM_DESC(alloc_bufs_at_load,
- "Non-zero value causes DMA buffers to be allocated at module "
- "load time. This increases the chances of successfully getting "
- "those buffers, but at the cost of nailing down the memory from "
- "the outset.");
+static int alloc_bufs_at_read;
+module_param(alloc_bufs_at_read, bool, 0444);
+MODULE_PARM_DESC(alloc_bufs_at_read,
+ "Non-zero value causes DMA buffers to be allocated when the "
+ "video capture device is read, rather than at module load "
+ "time. This saves memory, but decreases the chances of "
+ "successfully getting those buffers.");
static int n_dma_bufs = 3;
module_param(n_dma_bufs, uint, 0644);
"will be allowed to allocate. These buffers are big and live "
"in vmalloc space.");
-static int flip = 0;
+static int flip;
module_param(flip, bool, 0444);
MODULE_PARM_DESC(flip,
"If set, the sensor will be instructed to flip the image "
*/
struct cafe_camera
{
+ struct v4l2_device v4l2_dev;
enum cafe_state state;
unsigned long flags; /* Buffer status, mainly (dev_lock) */
int users; /* How many open FDs */
* Subsystem structures.
*/
struct pci_dev *pdev;
- struct video_device v4ldev;
+ struct video_device vdev;
struct i2c_adapter i2c_adapter;
- struct i2c_client *sensor;
+ struct v4l2_subdev *sensor;
+ unsigned short sensor_addr;
unsigned char __iomem *regs;
struct list_head dev_list; /* link to other devices */
struct tasklet_struct s_tasklet;
/* Current operating parameters */
- enum v4l2_chip_ident sensor_type; /* Currently ov7670 only */
+ u32 sensor_type; /* Currently ov7670 only */
struct v4l2_pix_format pix_format;
/* Locks */
/* Misc */
wait_queue_head_t smbus_wait; /* Waiting on i2c events */
wait_queue_head_t iowait; /* Waiting on frame data */
-#ifdef CONFIG_VIDEO_ADV_DEBUG
- struct dentry *dfs_regs;
- struct dentry *dfs_cam_regs;
-#endif
};
/*
#define CF_DMA_ACTIVE 3 /* A frame is incoming */
#define CF_CONFIG_NEEDED 4 /* Must configure hardware */
+#define sensor_call(cam, o, f, args...) \
+ v4l2_subdev_call(cam->sensor, o, f, ##args)
+
+static inline struct cafe_camera *to_cam(struct v4l2_device *dev)
+{
+ return container_of(dev, struct cafe_camera, v4l2_dev);
+}
/*
/* ---------------------------------------------------------------------*/
-/*
- * We keep a simple list of known devices to search at open time.
- */
-static LIST_HEAD(cafe_dev_list);
-static DEFINE_MUTEX(cafe_dev_list_lock);
-
-static void cafe_add_dev(struct cafe_camera *cam)
-{
- mutex_lock(&cafe_dev_list_lock);
- list_add_tail(&cam->dev_list, &cafe_dev_list);
- mutex_unlock(&cafe_dev_list_lock);
-}
-
-static void cafe_remove_dev(struct cafe_camera *cam)
-{
- mutex_lock(&cafe_dev_list_lock);
- list_del(&cam->dev_list);
- mutex_unlock(&cafe_dev_list_lock);
-}
-static struct cafe_camera *cafe_find_dev(int minor)
-{
- struct cafe_camera *cam;
-
- mutex_lock(&cafe_dev_list_lock);
- list_for_each_entry(cam, &cafe_dev_list, dev_list) {
- if (cam->v4ldev.minor == minor)
- goto done;
- }
- cam = NULL;
- done:
- mutex_unlock(&cafe_dev_list_lock);
- return cam;
-}
-
-
-static struct cafe_camera *cafe_find_by_pdev(struct pci_dev *pdev)
-{
- struct cafe_camera *cam;
-
- mutex_lock(&cafe_dev_list_lock);
- list_for_each_entry(cam, &cafe_dev_list, dev_list) {
- if (cam->pdev == pdev)
- goto done;
- }
- cam = NULL;
- done:
- mutex_unlock(&cafe_dev_list_lock);
- return cam;
-}
-
-
-/* ------------------------------------------------------------------------ */
/*
* Device register I/O
*/
{
unsigned int rval;
unsigned long flags;
+ DEFINE_WAIT(the_wait);
spin_lock_irqsave(&cam->dev_lock, flags);
rval = TWSIC0_EN | ((addr << TWSIC0_SID_SHIFT) & TWSIC0_SID);
rval = value | ((command << TWSIC1_ADDR_SHIFT) & TWSIC1_ADDR);
cafe_reg_write(cam, REG_TWSIC1, rval);
spin_unlock_irqrestore(&cam->dev_lock, flags);
- msleep(2); /* Required or things flake */
+ /*
+ * Time to wait for the write to complete. THIS IS A RACY
+ * WAY TO DO IT, but the sad fact is that reading the TWSIC1
+ * register too quickly after starting the operation sends
+ * the device into a place that may be kinder and better, but
+ * which is absolutely useless for controlling the sensor. In
+ * practice we have plenty of time to get into our sleep state
+ * before the interrupt hits, and the worst case is that we
+ * time out and then see that things completed, so this seems
+ * the best way for now.
+ */
+ do {
+ prepare_to_wait(&cam->smbus_wait, &the_wait,
+ TASK_UNINTERRUPTIBLE);
+ schedule_timeout(1); /* even 1 jiffy is too long */
+ finish_wait(&cam->smbus_wait, &the_wait);
+ } while (!cafe_smbus_write_done(cam));
+
+#ifdef IF_THE_CAFE_HARDWARE_WORKED_RIGHT
wait_event_timeout(cam->smbus_wait, cafe_smbus_write_done(cam),
CAFE_SMBUS_TIMEOUT);
+#endif
spin_lock_irqsave(&cam->dev_lock, flags);
rval = cafe_reg_read(cam, REG_TWSIC1);
spin_unlock_irqrestore(&cam->dev_lock, flags);
unsigned short flags, char rw, u8 command,
int size, union i2c_smbus_data *data)
{
- struct cafe_camera *cam = i2c_get_adapdata(adapter);
+ struct v4l2_device *v4l2_dev = i2c_get_adapdata(adapter);
+ struct cafe_camera *cam = to_cam(v4l2_dev);
int ret = -EINVAL;
/*
- * Refuse to talk to anything but OV cam chips. We should
- * never even see an attempt to do so, but one never knows.
- */
- if (cam->sensor && addr != cam->sensor->addr) {
- cam_err(cam, "funky smbus addr %d\n", addr);
- return -EINVAL;
- }
- /*
* This interface would appear to only do byte data ops. OK
* it can do word too, but the cam chip has no use for that.
*/
};
/* Somebody is on the bus */
-static int cafe_cam_init(struct cafe_camera *cam);
static void cafe_ctlr_stop_dma(struct cafe_camera *cam);
static void cafe_ctlr_power_down(struct cafe_camera *cam);
-static int cafe_smbus_attach(struct i2c_client *client)
-{
- struct cafe_camera *cam = i2c_get_adapdata(client->adapter);
-
- /*
- * Don't talk to chips we don't recognize.
- */
- if (client->driver->id == I2C_DRIVERID_OV7670) {
- cam->sensor = client;
- return cafe_cam_init(cam);
- }
- return -EINVAL;
-}
-
-static int cafe_smbus_detach(struct i2c_client *client)
-{
- struct cafe_camera *cam = i2c_get_adapdata(client->adapter);
-
- if (cam->sensor == client) {
- cafe_ctlr_stop_dma(cam);
- cafe_ctlr_power_down(cam);
- cam_err(cam, "lost the sensor!\n");
- cam->sensor = NULL; /* Bummer, no camera */
- cam->state = S_NOTREADY;
- }
- return 0;
-}
-
static int cafe_smbus_setup(struct cafe_camera *cam)
{
struct i2c_adapter *adap = &cam->i2c_adapter;
int ret;
cafe_smbus_enable_irq(cam);
- adap->id = I2C_HW_SMBUS_CAFE;
- adap->class = I2C_CLASS_CAM_DIGITAL;
adap->owner = THIS_MODULE;
- adap->client_register = cafe_smbus_attach;
- adap->client_unregister = cafe_smbus_detach;
adap->algo = &cafe_smbus_algo;
strcpy(adap->name, "cafe_ccic");
- i2c_set_adapdata(adap, cam);
+ adap->dev.parent = &cam->pdev->dev;
+ i2c_set_adapdata(adap, &cam->v4l2_dev);
ret = i2c_add_adapter(adap);
if (ret)
printk(KERN_ERR "Unable to register cafe i2c adapter\n");
cafe_reg_write(cam, REG_GL_CSR, GCSR_SRS|GCSR_MRS); /* Needed? */
cafe_reg_write(cam, REG_GL_CSR, GCSR_SRC|GCSR_MRC);
cafe_reg_write(cam, REG_GL_CSR, GCSR_SRC|GCSR_MRS);
- mdelay(5); /* FIXME revisit this */
+ /*
+ * Here we must wait a bit for the controller to come around.
+ */
+ spin_unlock_irqrestore(&cam->dev_lock, flags);
+ msleep(5);
+ spin_lock_irqsave(&cam->dev_lock, flags);
+
cafe_reg_write(cam, REG_GL_CSR, GCSR_CCIC_EN|GCSR_SRC|GCSR_MRC);
cafe_reg_set_bit(cam, REG_GL_IMASK, GIMSK_CCIC_EN);
/*
spin_lock_irqsave(&cam->dev_lock, flags);
cafe_reg_clear_bit(cam, REG_CTRL1, C1_PWRDWN);
/*
+ * Part one of the sensor dance: turn the global
+ * GPIO signal on.
+ */
+ cafe_reg_write(cam, REG_GL_FCR, GFCR_GPIO_ON);
+ cafe_reg_write(cam, REG_GL_GPIOR, GGPIO_OUT|GGPIO_VAL);
+ /*
* Put the sensor into operational mode (assumes OLPC-style
* wiring). Control 0 is reset - set to 1 to operate.
* Control 1 is power down, set to 0 to operate.
*/
cafe_reg_write(cam, REG_GPR, GPR_C1EN|GPR_C0EN); /* pwr up, reset */
- mdelay(1); /* Marvell says 1ms will do it */
+/* mdelay(1); */ /* Marvell says 1ms will do it */
cafe_reg_write(cam, REG_GPR, GPR_C1EN|GPR_C0EN|GPR_C0);
- mdelay(1); /* Enough? */
+/* mdelay(1); */ /* Enough? */
spin_unlock_irqrestore(&cam->dev_lock, flags);
+ msleep(5); /* Just to be sure */
}
static void cafe_ctlr_power_down(struct cafe_camera *cam)
spin_lock_irqsave(&cam->dev_lock, flags);
cafe_reg_write(cam, REG_GPR, GPR_C1EN|GPR_C0EN|GPR_C1);
+ cafe_reg_write(cam, REG_GL_FCR, GFCR_GPIO_ON);
+ cafe_reg_write(cam, REG_GL_GPIOR, GGPIO_OUT);
cafe_reg_set_bit(cam, REG_CTRL1, C1_PWRDWN);
spin_unlock_irqrestore(&cam->dev_lock, flags);
}
* Communications with the sensor.
*/
-static int __cafe_cam_cmd(struct cafe_camera *cam, int cmd, void *arg)
-{
- struct i2c_client *sc = cam->sensor;
- int ret;
-
- if (sc == NULL || sc->driver == NULL || sc->driver->command == NULL)
- return -EINVAL;
- ret = sc->driver->command(sc, cmd, arg);
- if (ret == -EPERM) /* Unsupported command */
- return 0;
- return ret;
-}
-
static int __cafe_cam_reset(struct cafe_camera *cam)
{
- int zero = 0;
- return __cafe_cam_cmd(cam, VIDIOC_INT_RESET, &zero);
+ return sensor_call(cam, core, reset, 0);
}
/*
*/
static int cafe_cam_init(struct cafe_camera *cam)
{
+ struct v4l2_dbg_chip_ident chip;
int ret;
mutex_lock(&cam->s_mutex);
ret = __cafe_cam_reset(cam);
if (ret)
goto out;
- ret = __cafe_cam_cmd(cam, VIDIOC_INT_G_CHIP_IDENT, &cam->sensor_type);
+ chip.ident = V4L2_IDENT_NONE;
+ chip.match.type = V4L2_CHIP_MATCH_I2C_ADDR;
+ chip.match.addr = cam->sensor_addr;
+ ret = sensor_call(cam, core, g_chip_ident, &chip);
if (ret)
goto out;
-// if (cam->sensor->addr != OV7xx0_SID) {
+ cam->sensor_type = chip.ident;
if (cam->sensor_type != V4L2_IDENT_OV7670) {
- cam_err(cam, "Unsupported sensor type %d", cam->sensor->addr);
+ cam_err(cam, "Unsupported sensor type 0x%x", cam->sensor_type);
ret = -EINVAL;
goto out;
}
ret = 0;
cam->state = S_IDLE;
out:
+ cafe_ctlr_power_down(cam);
mutex_unlock(&cam->s_mutex);
return ret;
}
memset(&ctrl, 0, sizeof(ctrl));
ctrl.id = V4L2_CID_VFLIP;
ctrl.value = flip;
- return __cafe_cam_cmd(cam, VIDIOC_S_CTRL, &ctrl);
+ return sensor_call(cam, core, s_ctrl, &ctrl);
}
static int cafe_cam_configure(struct cafe_camera *cam)
{
struct v4l2_format fmt;
- int ret, zero = 0;
+ int ret;
if (cam->state != S_IDLE)
return -EINVAL;
fmt.fmt.pix = cam->pix_format;
- ret = __cafe_cam_cmd(cam, VIDIOC_INT_INIT, &zero);
+ ret = sensor_call(cam, core, init, 0);
if (ret == 0)
- ret = __cafe_cam_cmd(cam, VIDIOC_S_FMT, &fmt);
+ ret = sensor_call(cam, video, s_fmt, &fmt);
/*
* OV7670 does weird things if flip is set *before* format...
*/
char __user *buffer, size_t len, loff_t *pos)
{
struct cafe_camera *cam = filp->private_data;
- int ret;
+ int ret = 0;
/*
* Perhaps we're in speculative read mode and already
buf->v4lbuf.field = V4L2_FIELD_NONE;
buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
/*
- * Offset: must be 32-bit even on a 64-bit system. video-buf
+ * Offset: must be 32-bit even on a 64-bit system. videobuf-dma-sg
* just uses the length times the index, but the spec warns
* against doing just that - vma merging problems. So we
* leave a gap between each pair of buffers.
struct v4l2_requestbuffers *req)
{
struct cafe_camera *cam = filp->private_data;
- int ret;
+ int ret = 0; /* Silence warning */
/*
* Make sure it's something we can do. User pointers could be
* implemented without great pain, but that's not been done yet.
*/
- if (req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
- return -EINVAL;
if (req->memory != V4L2_MEMORY_MMAP)
return -EINVAL;
/*
if (cam->n_sbufs == 0) /* no luck at all - ret already set */
kfree(cam->sb_bufs);
- else
- ret = 0;
req->count = cam->n_sbufs; /* In case of partial success */
out:
int ret = -EINVAL;
mutex_lock(&cam->s_mutex);
- if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
- goto out;
- if (buf->index < 0 || buf->index >= cam->n_sbufs)
+ if (buf->index >= cam->n_sbufs)
goto out;
*buf = cam->sb_bufs[buf->index].v4lbuf;
ret = 0;
unsigned long flags;
mutex_lock(&cam->s_mutex);
- if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
- goto out;
- if (buf->index < 0 || buf->index >= cam->n_sbufs)
+ if (buf->index >= cam->n_sbufs)
goto out;
sbuf = cam->sb_bufs + buf->index;
if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED) {
unsigned long flags;
mutex_lock(&cam->s_mutex);
- if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
- goto out_unlock;
if (cam->state != S_STREAMING)
goto out_unlock;
if (list_empty(&cam->sb_full) && filp->f_flags & O_NONBLOCK) {
mutex_unlock(&sbuf->cam->s_mutex);
}
-static struct vm_operations_struct cafe_v4l_vm_ops = {
+static const struct vm_operations_struct cafe_v4l_vm_ops = {
.open = cafe_v4l_vm_open,
.close = cafe_v4l_vm_close
};
-static int cafe_v4l_open(struct inode *inode, struct file *filp)
+static int cafe_v4l_open(struct file *filp)
{
- struct cafe_camera *cam;
+ struct cafe_camera *cam = video_drvdata(filp);
- cam = cafe_find_dev(iminor(inode));
- if (cam == NULL)
- return -ENODEV;
filp->private_data = cam;
mutex_lock(&cam->s_mutex);
}
-static int cafe_v4l_release(struct inode *inode, struct file *filp)
+static int cafe_v4l_release(struct file *filp)
{
struct cafe_camera *cam = filp->private_data;
}
if (cam->users == 0) {
cafe_ctlr_power_down(cam);
- if (! alloc_bufs_at_load)
+ if (alloc_bufs_at_read)
cafe_free_dma_bufs(cam);
}
mutex_unlock(&cam->s_mutex);
static int cafe_vidioc_queryctrl(struct file *filp, void *priv,
struct v4l2_queryctrl *qc)
{
- struct cafe_camera *cam = filp->private_data;
+ struct cafe_camera *cam = priv;
int ret;
mutex_lock(&cam->s_mutex);
- ret = __cafe_cam_cmd(cam, VIDIOC_QUERYCTRL, qc);
+ ret = sensor_call(cam, core, queryctrl, qc);
mutex_unlock(&cam->s_mutex);
return ret;
}
static int cafe_vidioc_g_ctrl(struct file *filp, void *priv,
struct v4l2_control *ctrl)
{
- struct cafe_camera *cam = filp->private_data;
+ struct cafe_camera *cam = priv;
int ret;
mutex_lock(&cam->s_mutex);
- ret = __cafe_cam_cmd(cam, VIDIOC_G_CTRL, ctrl);
+ ret = sensor_call(cam, core, g_ctrl, ctrl);
mutex_unlock(&cam->s_mutex);
return ret;
}
static int cafe_vidioc_s_ctrl(struct file *filp, void *priv,
struct v4l2_control *ctrl)
{
- struct cafe_camera *cam = filp->private_data;
+ struct cafe_camera *cam = priv;
int ret;
mutex_lock(&cam->s_mutex);
- ret = __cafe_cam_cmd(cam, VIDIOC_S_CTRL, ctrl);
+ ret = sensor_call(cam, core, s_ctrl, ctrl);
mutex_unlock(&cam->s_mutex);
return ret;
}
.sizeimage = VGA_WIDTH*VGA_HEIGHT*2,
};
-static int cafe_vidioc_enum_fmt_cap(struct file *filp,
+static int cafe_vidioc_enum_fmt_vid_cap(struct file *filp,
void *priv, struct v4l2_fmtdesc *fmt)
{
struct cafe_camera *cam = priv;
int ret;
- if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
- return -EINVAL;
mutex_lock(&cam->s_mutex);
- ret = __cafe_cam_cmd(cam, VIDIOC_ENUM_FMT, fmt);
+ ret = sensor_call(cam, video, enum_fmt, fmt);
mutex_unlock(&cam->s_mutex);
return ret;
}
-static int cafe_vidioc_try_fmt_cap (struct file *filp, void *priv,
+static int cafe_vidioc_try_fmt_vid_cap(struct file *filp, void *priv,
struct v4l2_format *fmt)
{
struct cafe_camera *cam = priv;
int ret;
mutex_lock(&cam->s_mutex);
- ret = __cafe_cam_cmd(cam, VIDIOC_TRY_FMT, fmt);
+ ret = sensor_call(cam, video, try_fmt, fmt);
mutex_unlock(&cam->s_mutex);
return ret;
}
-static int cafe_vidioc_s_fmt_cap(struct file *filp, void *priv,
+static int cafe_vidioc_s_fmt_vid_cap(struct file *filp, void *priv,
struct v4l2_format *fmt)
{
struct cafe_camera *cam = priv;
/*
* See if the formatting works in principle.
*/
- ret = cafe_vidioc_try_fmt_cap(filp, priv, fmt);
+ ret = cafe_vidioc_try_fmt_vid_cap(filp, priv, fmt);
if (ret)
return ret;
/*
* The V4l2 spec wants us to be smarter, and actually get this from
* the camera (and not mess with it at open time). Someday.
*/
-static int cafe_vidioc_g_fmt_cap(struct file *filp, void *priv,
+static int cafe_vidioc_g_fmt_vid_cap(struct file *filp, void *priv,
struct v4l2_format *f)
{
struct cafe_camera *cam = priv;
return 0;
}
-static void cafe_v4l_dev_release(struct video_device *vd)
+/*
+ * G/S_PARM. Most of this is done by the sensor, but we are
+ * the level which controls the number of read buffers.
+ */
+static int cafe_vidioc_g_parm(struct file *filp, void *priv,
+ struct v4l2_streamparm *parms)
{
- struct cafe_camera *cam = container_of(vd, struct cafe_camera, v4ldev);
+ struct cafe_camera *cam = priv;
+ int ret;
- kfree(cam);
+ mutex_lock(&cam->s_mutex);
+ ret = sensor_call(cam, video, g_parm, parms);
+ mutex_unlock(&cam->s_mutex);
+ parms->parm.capture.readbuffers = n_dma_bufs;
+ return ret;
+}
+
+static int cafe_vidioc_s_parm(struct file *filp, void *priv,
+ struct v4l2_streamparm *parms)
+{
+ struct cafe_camera *cam = priv;
+ int ret;
+
+ mutex_lock(&cam->s_mutex);
+ ret = sensor_call(cam, video, s_parm, parms);
+ mutex_unlock(&cam->s_mutex);
+ parms->parm.capture.readbuffers = n_dma_bufs;
+ return ret;
+}
+
+static int cafe_vidioc_g_chip_ident(struct file *file, void *priv,
+ struct v4l2_dbg_chip_ident *chip)
+{
+ struct cafe_camera *cam = priv;
+
+ chip->ident = V4L2_IDENT_NONE;
+ chip->revision = 0;
+ if (v4l2_chip_match_host(&chip->match)) {
+ chip->ident = V4L2_IDENT_CAFE;
+ return 0;
+ }
+ return sensor_call(cam, core, g_chip_ident, chip);
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int cafe_vidioc_g_register(struct file *file, void *priv,
+ struct v4l2_dbg_register *reg)
+{
+ struct cafe_camera *cam = priv;
+
+ if (v4l2_chip_match_host(®->match)) {
+ reg->val = cafe_reg_read(cam, reg->reg);
+ reg->size = 4;
+ return 0;
+ }
+ return sensor_call(cam, core, g_register, reg);
}
+static int cafe_vidioc_s_register(struct file *file, void *priv,
+ struct v4l2_dbg_register *reg)
+{
+ struct cafe_camera *cam = priv;
+
+ if (v4l2_chip_match_host(®->match)) {
+ cafe_reg_write(cam, reg->reg, reg->val);
+ return 0;
+ }
+ return sensor_call(cam, core, s_register, reg);
+}
+#endif
/*
* This template device holds all of those v4l2 methods; we
* clone it for specific real devices.
*/
-static struct file_operations cafe_v4l_fops = {
+static const struct v4l2_file_operations cafe_v4l_fops = {
.owner = THIS_MODULE,
.open = cafe_v4l_open,
.release = cafe_v4l_release,
.poll = cafe_v4l_poll,
.mmap = cafe_v4l_mmap,
.ioctl = video_ioctl2,
- .llseek = no_llseek,
};
-static struct video_device cafe_v4l_template = {
- .name = "cafe",
- .type = VFL_TYPE_GRABBER,
- .type2 = VID_TYPE_CAPTURE,
- .minor = -1, /* Get one dynamically */
- .tvnorms = V4L2_STD_NTSC_M,
- .current_norm = V4L2_STD_NTSC_M, /* make mplayer happy */
-
- .fops = &cafe_v4l_fops,
- .release = cafe_v4l_dev_release,
-
+static const struct v4l2_ioctl_ops cafe_v4l_ioctl_ops = {
.vidioc_querycap = cafe_vidioc_querycap,
- .vidioc_enum_fmt_cap = cafe_vidioc_enum_fmt_cap,
- .vidioc_try_fmt_cap = cafe_vidioc_try_fmt_cap,
- .vidioc_s_fmt_cap = cafe_vidioc_s_fmt_cap,
- .vidioc_g_fmt_cap = cafe_vidioc_g_fmt_cap,
+ .vidioc_enum_fmt_vid_cap = cafe_vidioc_enum_fmt_vid_cap,
+ .vidioc_try_fmt_vid_cap = cafe_vidioc_try_fmt_vid_cap,
+ .vidioc_s_fmt_vid_cap = cafe_vidioc_s_fmt_vid_cap,
+ .vidioc_g_fmt_vid_cap = cafe_vidioc_g_fmt_vid_cap,
.vidioc_enum_input = cafe_vidioc_enum_input,
.vidioc_g_input = cafe_vidioc_g_input,
.vidioc_s_input = cafe_vidioc_s_input,
.vidioc_queryctrl = cafe_vidioc_queryctrl,
.vidioc_g_ctrl = cafe_vidioc_g_ctrl,
.vidioc_s_ctrl = cafe_vidioc_s_ctrl,
- /* Do cropping someday */
+ .vidioc_g_parm = cafe_vidioc_g_parm,
+ .vidioc_s_parm = cafe_vidioc_s_parm,
+ .vidioc_g_chip_ident = cafe_vidioc_g_chip_ident,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ .vidioc_g_register = cafe_vidioc_g_register,
+ .vidioc_s_register = cafe_vidioc_s_register,
+#endif
};
+static struct video_device cafe_v4l_template = {
+ .name = "cafe",
+ .tvnorms = V4L2_STD_NTSC_M,
+ .current_norm = V4L2_STD_NTSC_M, /* make mplayer happy */
-
-
-
+ .fops = &cafe_v4l_fops,
+ .ioctl_ops = &cafe_v4l_ioctl_ops,
+ .release = video_device_release_empty,
+};
/* ---------------------------------------------------------------------- */
if (list_empty(&cam->sb_avail))
break; /* Leave it valid, hope for better later */
clear_bit(bufno, &cam->flags);
- /*
- * We could perhaps drop the spinlock during this
- * big copy. Something to consider.
- */
sbuf = list_entry(cam->sb_avail.next,
struct cafe_sio_buffer, list);
+ /*
+ * Drop the lock during the big copy. This *should* be safe...
+ */
+ spin_unlock_irqrestore(&cam->dev_lock, flags);
memcpy(sbuf->buffer, cam->dma_bufs[bufno],
cam->pix_format.sizeimage);
sbuf->v4lbuf.bytesused = cam->pix_format.sizeimage;
sbuf->v4lbuf.sequence = cam->buf_seq[bufno];
sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
+ spin_lock_irqsave(&cam->dev_lock, flags);
list_move_tail(&sbuf->list, &cam->sb_full);
}
if (! list_empty(&cam->sb_full))
/* -------------------------------------------------------------------------- */
-#ifdef CONFIG_VIDEO_ADV_DEBUG
-/*
- * Debugfs stuff.
- */
-
-static char cafe_debug_buf[1024];
-static struct dentry *cafe_dfs_root;
-
-static void cafe_dfs_setup(void)
-{
- cafe_dfs_root = debugfs_create_dir("cafe_ccic", NULL);
- if (IS_ERR(cafe_dfs_root)) {
- cafe_dfs_root = NULL; /* Never mind */
- printk(KERN_NOTICE "cafe_ccic unable to set up debugfs\n");
- }
-}
-
-static void cafe_dfs_shutdown(void)
-{
- if (cafe_dfs_root)
- debugfs_remove(cafe_dfs_root);
-}
-
-static int cafe_dfs_open(struct inode *inode, struct file *file)
-{
- file->private_data = inode->i_private;
- return 0;
-}
-
-static ssize_t cafe_dfs_read_regs(struct file *file,
- char __user *buf, size_t count, loff_t *ppos)
-{
- struct cafe_camera *cam = file->private_data;
- char *s = cafe_debug_buf;
- int offset;
-
- for (offset = 0; offset < 0x44; offset += 4)
- s += sprintf(s, "%02x: %08x\n", offset,
- cafe_reg_read(cam, offset));
- for (offset = 0x88; offset <= 0x90; offset += 4)
- s += sprintf(s, "%02x: %08x\n", offset,
- cafe_reg_read(cam, offset));
- for (offset = 0xb4; offset <= 0xbc; offset += 4)
- s += sprintf(s, "%02x: %08x\n", offset,
- cafe_reg_read(cam, offset));
- for (offset = 0x3000; offset <= 0x300c; offset += 4)
- s += sprintf(s, "%04x: %08x\n", offset,
- cafe_reg_read(cam, offset));
- return simple_read_from_buffer(buf, count, ppos, cafe_debug_buf,
- s - cafe_debug_buf);
-}
-
-static struct file_operations cafe_dfs_reg_ops = {
- .owner = THIS_MODULE,
- .read = cafe_dfs_read_regs,
- .open = cafe_dfs_open
-};
-
-static ssize_t cafe_dfs_read_cam(struct file *file,
- char __user *buf, size_t count, loff_t *ppos)
-{
- struct cafe_camera *cam = file->private_data;
- char *s = cafe_debug_buf;
- int offset;
-
- if (! cam->sensor)
- return -EINVAL;
- for (offset = 0x0; offset < 0x8a; offset++)
- {
- u8 v;
-
- cafe_smbus_read_data(cam, cam->sensor->addr, offset, &v);
- s += sprintf(s, "%02x: %02x\n", offset, v);
- }
- return simple_read_from_buffer(buf, count, ppos, cafe_debug_buf,
- s - cafe_debug_buf);
-}
-
-static struct file_operations cafe_dfs_cam_ops = {
- .owner = THIS_MODULE,
- .read = cafe_dfs_read_cam,
- .open = cafe_dfs_open
-};
-
-
-
-static void cafe_dfs_cam_setup(struct cafe_camera *cam)
-{
- char fname[40];
-
- if (!cafe_dfs_root)
- return;
- sprintf(fname, "regs-%d", cam->v4ldev.minor);
- cam->dfs_regs = debugfs_create_file(fname, 0444, cafe_dfs_root,
- cam, &cafe_dfs_reg_ops);
- sprintf(fname, "cam-%d", cam->v4ldev.minor);
- cam->dfs_cam_regs = debugfs_create_file(fname, 0444, cafe_dfs_root,
- cam, &cafe_dfs_cam_ops);
-}
-
-
-static void cafe_dfs_cam_shutdown(struct cafe_camera *cam)
-{
- if (! IS_ERR(cam->dfs_regs))
- debugfs_remove(cam->dfs_regs);
- if (! IS_ERR(cam->dfs_cam_regs))
- debugfs_remove(cam->dfs_cam_regs);
-}
-
-#else
-
-#define cafe_dfs_setup()
-#define cafe_dfs_shutdown()
-#define cafe_dfs_cam_setup(cam)
-#define cafe_dfs_cam_shutdown(cam)
-#endif /* CONFIG_VIDEO_ADV_DEBUG */
-
-
-
-
-/* ------------------------------------------------------------------------*/
/*
* PCI interface stuff.
*/
const struct pci_device_id *id)
{
int ret;
- u16 classword;
struct cafe_camera *cam;
- /*
- * Make sure we have a camera here - we'll get calls for
- * the other cafe devices as well.
- */
- pci_read_config_word(pdev, PCI_CLASS_DEVICE, &classword);
- if (classword != PCI_CLASS_MULTIMEDIA_VIDEO)
- return -ENODEV;
+
/*
* Start putting together one of our big camera structures.
*/
cam = kzalloc(sizeof(struct cafe_camera), GFP_KERNEL);
if (cam == NULL)
goto out;
+ ret = v4l2_device_register(&pdev->dev, &cam->v4l2_dev);
+ if (ret)
+ goto out_free;
+
mutex_init(&cam->s_mutex);
- mutex_lock(&cam->s_mutex);
spin_lock_init(&cam->dev_lock);
cam->state = S_NOTREADY;
cafe_set_config_needed(cam, 1);
*/
ret = pci_enable_device(pdev);
if (ret)
- goto out_free;
+ goto out_unreg;
pci_set_master(pdev);
ret = -EIO;
cam->regs = pci_iomap(pdev, 0, 0);
if (! cam->regs) {
printk(KERN_ERR "Unable to ioremap cafe-ccic regs\n");
- goto out_free;
+ goto out_unreg;
}
ret = request_irq(pdev->irq, cafe_irq, IRQF_SHARED, "cafe-ccic", cam);
if (ret)
goto out_iounmap;
+ /*
+ * Initialize the controller and leave it powered up. It will
+ * stay that way until the sensor driver shows up.
+ */
cafe_ctlr_init(cam);
cafe_ctlr_power_up(cam);
/*
- * Set up I2C/SMBUS communications
+ * Set up I2C/SMBUS communications. We have to drop the mutex here
+ * because the sensor could attach in this call chain, leading to
+ * unsightly deadlocks.
*/
- mutex_unlock(&cam->s_mutex); /* attach can deadlock */
ret = cafe_smbus_setup(cam);
if (ret)
goto out_freeirq;
+
+ cam->sensor_addr = 0x42;
+ cam->sensor = v4l2_i2c_new_subdev(&cam->v4l2_dev, &cam->i2c_adapter,
+ "ov7670", "ov7670", cam->sensor_addr, NULL);
+ if (cam->sensor == NULL) {
+ ret = -ENODEV;
+ goto out_smbus;
+ }
+ ret = cafe_cam_init(cam);
+ if (ret)
+ goto out_smbus;
+
/*
* Get the v4l2 setup done.
*/
mutex_lock(&cam->s_mutex);
- cam->v4ldev = cafe_v4l_template;
- cam->v4ldev.debug = 0;
-// cam->v4ldev.debug = V4L2_DEBUG_IOCTL_ARG;
- ret = video_register_device(&cam->v4ldev, VFL_TYPE_GRABBER, -1);
+ cam->vdev = cafe_v4l_template;
+ cam->vdev.debug = 0;
+/* cam->vdev.debug = V4L2_DEBUG_IOCTL_ARG;*/
+ cam->vdev.v4l2_dev = &cam->v4l2_dev;
+ ret = video_register_device(&cam->vdev, VFL_TYPE_GRABBER, -1);
if (ret)
- goto out_smbus;
+ goto out_unlock;
+ video_set_drvdata(&cam->vdev, cam);
+
/*
* If so requested, try to get our DMA buffers now.
*/
- if (alloc_bufs_at_load) {
+ if (!alloc_bufs_at_read) {
if (cafe_alloc_dma_bufs(cam, 1))
cam_warn(cam, "Unable to alloc DMA buffers at load"
" will try again later.");
}
- cafe_dfs_cam_setup(cam);
mutex_unlock(&cam->s_mutex);
- cafe_add_dev(cam);
return 0;
- out_smbus:
+out_unlock:
+ mutex_unlock(&cam->s_mutex);
+out_smbus:
cafe_smbus_shutdown(cam);
- out_freeirq:
+out_freeirq:
cafe_ctlr_power_down(cam);
free_irq(pdev->irq, cam);
- out_iounmap:
+out_iounmap:
pci_iounmap(pdev, cam->regs);
- out_free:
+out_free:
+ v4l2_device_unregister(&cam->v4l2_dev);
+out_unreg:
kfree(cam);
- out:
+out:
return ret;
}
static void cafe_shutdown(struct cafe_camera *cam)
{
/* FIXME: Make sure we take care of everything here */
- cafe_dfs_cam_shutdown(cam);
if (cam->n_sbufs > 0)
/* What if they are still mapped? Shouldn't be, but... */
cafe_free_sio_buffers(cam);
- cafe_remove_dev(cam);
cafe_ctlr_stop_dma(cam);
cafe_ctlr_power_down(cam);
cafe_smbus_shutdown(cam);
cafe_free_dma_bufs(cam);
free_irq(cam->pdev->irq, cam);
pci_iounmap(cam->pdev, cam->regs);
- video_unregister_device(&cam->v4ldev);
- /* kfree(cam); done in v4l_release () */
+ video_unregister_device(&cam->vdev);
}
static void cafe_pci_remove(struct pci_dev *pdev)
{
- struct cafe_camera *cam = cafe_find_by_pdev(pdev);
+ struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev);
+ struct cafe_camera *cam = to_cam(v4l2_dev);
if (cam == NULL) {
- cam_warn(cam, "pci_remove on unknown pdev %p\n", pdev);
+ printk(KERN_WARNING "pci_remove on unknown pdev %p\n", pdev);
return;
}
mutex_lock(&cam->s_mutex);
if (cam->users > 0)
cam_warn(cam, "Removing a device with users!\n");
cafe_shutdown(cam);
+ v4l2_device_unregister(&cam->v4l2_dev);
+ kfree(cam);
/* No unlock - it no longer exists */
}
+#ifdef CONFIG_PM
+/*
+ * Basic power management.
+ */
+static int cafe_pci_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev);
+ struct cafe_camera *cam = to_cam(v4l2_dev);
+ int ret;
+ enum cafe_state cstate;
+
+ ret = pci_save_state(pdev);
+ if (ret)
+ return ret;
+ cstate = cam->state; /* HACK - stop_dma sets to idle */
+ cafe_ctlr_stop_dma(cam);
+ cafe_ctlr_power_down(cam);
+ pci_disable_device(pdev);
+ cam->state = cstate;
+ return 0;
+}
+
+
+static int cafe_pci_resume(struct pci_dev *pdev)
+{
+ struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev);
+ struct cafe_camera *cam = to_cam(v4l2_dev);
+ int ret = 0;
+
+ ret = pci_restore_state(pdev);
+ if (ret)
+ return ret;
+ ret = pci_enable_device(pdev);
+
+ if (ret) {
+ cam_warn(cam, "Unable to re-enable device on resume!\n");
+ return ret;
+ }
+ cafe_ctlr_init(cam);
+ cafe_ctlr_power_down(cam);
+
+ mutex_lock(&cam->s_mutex);
+ if (cam->users > 0) {
+ cafe_ctlr_power_up(cam);
+ __cafe_cam_reset(cam);
+ }
+ mutex_unlock(&cam->s_mutex);
+
+ set_bit(CF_CONFIG_NEEDED, &cam->flags);
+ if (cam->state == S_SPECREAD)
+ cam->state = S_IDLE; /* Don't bother restarting */
+ else if (cam->state == S_SINGLEREAD || cam->state == S_STREAMING)
+ ret = cafe_read_setup(cam, cam->state);
+ return ret;
+}
+
+#endif /* CONFIG_PM */
static struct pci_device_id cafe_ids[] = {
- { PCI_DEVICE(0x1148, 0x4340) }, /* Temporary ID on devel board */
- { PCI_DEVICE(0x11ab, 0x4100) }, /* Eventual real ID */
- { PCI_DEVICE(0x11ab, 0x4102) }, /* Really eventual real ID */
+ { PCI_DEVICE(PCI_VENDOR_ID_MARVELL,
+ PCI_DEVICE_ID_MARVELL_88ALP01_CCIC) },
{ 0, }
};
.id_table = cafe_ids,
.probe = cafe_pci_probe,
.remove = cafe_pci_remove,
+#ifdef CONFIG_PM
+ .suspend = cafe_pci_suspend,
+ .resume = cafe_pci_resume,
+#endif
};
printk(KERN_NOTICE "Marvell M88ALP01 'CAFE' Camera Controller version %d\n",
CAFE_VERSION);
- cafe_dfs_setup();
ret = pci_register_driver(&cafe_pci_driver);
if (ret) {
printk(KERN_ERR "Unable to register cafe_ccic driver\n");
goto out;
}
- request_module("ov7670"); /* FIXME want something more general */
ret = 0;
out:
static void __exit cafe_exit(void)
{
pci_unregister_driver(&cafe_pci_driver);
- cafe_dfs_shutdown();
}
module_init(cafe_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff