-/*
- * A driver for the CMOS camera controller in the Marvell 88ALP01 "cafe"
- * multifunction chip. Currently works with the Omnivision OV7670
- * sensor.
- *
- * Copyright 2006 One Laptop Per Child Association, Inc.
- * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
- *
- * Written by Jonathan Corbet, corbet@lwn.net.
- *
- * 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/pci.h>
-#include <linux/i2c.h>
-#include <linux/interrupt.h>
-#include <linux/spinlock.h>
-#include <linux/videodev2.h>
-#include <media/v4l2-common.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 <asm/uaccess.h>
-#include <asm/io.h>
-
-#include "cafe_ccic-regs.h"
-
-#define CAFE_VERSION 0x000002
-
-
-/*
- * Parameters.
- */
-MODULE_AUTHOR("Jonathan Corbet <corbet@lwn.net>");
-MODULE_DESCRIPTION("Marvell 88ALP01 CMOS Camera Controller driver");
-MODULE_LICENSE("GPL");
-MODULE_SUPPORTED_DEVICE("Video");
-
-/*
- * Internal DMA buffer management. Since the controller cannot do S/G I/O,
- * we must have physically contiguous buffers to bring frames into.
- * These parameters control how many buffers we use, whether we
- * allocate them at load time (better chance of success, but nails down
- * memory) or when somebody tries to use the camera (riskier), and,
- * for load-time allocation, how big they should be.
- *
- * The controller can cycle through three buffers. We could use
- * more by flipping pointers around, but it probably makes little
- * sense.
- */
-
-#define MAX_DMA_BUFS 3
-static int alloc_bufs_at_read = 0;
-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);
-MODULE_PARM_DESC(n_dma_bufs,
- "The number of DMA buffers to allocate. Can be either two "
- "(saves memory, makes timing tighter) or three.");
-
-static int dma_buf_size = VGA_WIDTH * VGA_HEIGHT * 2; /* Worst case */
-module_param(dma_buf_size, uint, 0444);
-MODULE_PARM_DESC(dma_buf_size,
- "The size of the allocated DMA buffers. If actual operating "
- "parameters require larger buffers, an attempt to reallocate "
- "will be made.");
-
-static int min_buffers = 1;
-module_param(min_buffers, uint, 0644);
-MODULE_PARM_DESC(min_buffers,
- "The minimum number of streaming I/O buffers we are willing "
- "to work with.");
-
-static int max_buffers = 10;
-module_param(max_buffers, uint, 0644);
-MODULE_PARM_DESC(max_buffers,
- "The maximum number of streaming I/O buffers an application "
- "will be allowed to allocate. These buffers are big and live "
- "in vmalloc space.");
-
-static int flip = 0;
-module_param(flip, bool, 0444);
-MODULE_PARM_DESC(flip,
- "If set, the sensor will be instructed to flip the image "
- "vertically.");
-
-
-enum cafe_state {
- S_NOTREADY, /* Not yet initialized */
- S_IDLE, /* Just hanging around */
- S_FLAKED, /* Some sort of problem */
- S_SINGLEREAD, /* In read() */
- S_SPECREAD, /* Speculative read (for future read()) */
- S_STREAMING /* Streaming data */
-};
-
-/*
- * Tracking of streaming I/O buffers.
- */
-struct cafe_sio_buffer {
- struct list_head list;
- struct v4l2_buffer v4lbuf;
- char *buffer; /* Where it lives in kernel space */
- int mapcount;
- struct cafe_camera *cam;
-};
-
-/*
- * A description of one of our devices.
- * Locking: controlled by s_mutex. Certain fields, however, require
- * the dev_lock spinlock; they are marked as such by comments.
- * dev_lock is also required for access to device registers.
- */
-struct cafe_camera
-{
- enum cafe_state state;
- unsigned long flags; /* Buffer status, mainly (dev_lock) */
- int users; /* How many open FDs */
- struct file *owner; /* Who has data access (v4l2) */
-
- /*
- * Subsystem structures.
- */
- struct pci_dev *pdev;
- struct video_device v4ldev;
- struct i2c_adapter i2c_adapter;
- struct i2c_client *sensor;
-
- unsigned char __iomem *regs;
- struct list_head dev_list; /* link to other devices */
-
- /* DMA buffers */
- unsigned int nbufs; /* How many are alloc'd */
- int next_buf; /* Next to consume (dev_lock) */
- unsigned int dma_buf_size; /* allocated size */
- void *dma_bufs[MAX_DMA_BUFS]; /* Internal buffer addresses */
- dma_addr_t dma_handles[MAX_DMA_BUFS]; /* Buffer bus addresses */
- unsigned int specframes; /* Unconsumed spec frames (dev_lock) */
- unsigned int sequence; /* Frame sequence number */
- unsigned int buf_seq[MAX_DMA_BUFS]; /* Sequence for individual buffers */
-
- /* Streaming buffers */
- unsigned int n_sbufs; /* How many we have */
- struct cafe_sio_buffer *sb_bufs; /* The array of housekeeping structs */
- struct list_head sb_avail; /* Available for data (we own) (dev_lock) */
- struct list_head sb_full; /* With data (user space owns) (dev_lock) */
- struct tasklet_struct s_tasklet;
-
- /* Current operating parameters */
- u32 sensor_type; /* Currently ov7670 only */
- struct v4l2_pix_format pix_format;
-
- /* Locks */
- struct mutex s_mutex; /* Access to this structure */
- spinlock_t dev_lock; /* Access to device */
-
- /* 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
-};
-
-/*
- * Status flags. Always manipulated with bit operations.
- */
-#define CF_BUF0_VALID 0 /* Buffers valid - first three */
-#define CF_BUF1_VALID 1
-#define CF_BUF2_VALID 2
-#define CF_DMA_ACTIVE 3 /* A frame is incoming */
-#define CF_CONFIG_NEEDED 4 /* Must configure hardware */
-
-
-
-/*
- * Start over with DMA buffers - dev_lock needed.
- */
-static void cafe_reset_buffers(struct cafe_camera *cam)
-{
- int i;
-
- cam->next_buf = -1;
- for (i = 0; i < cam->nbufs; i++)
- clear_bit(i, &cam->flags);
- cam->specframes = 0;
-}
-
-static inline int cafe_needs_config(struct cafe_camera *cam)
-{
- return test_bit(CF_CONFIG_NEEDED, &cam->flags);
-}
-
-static void cafe_set_config_needed(struct cafe_camera *cam, int needed)
-{
- if (needed)
- set_bit(CF_CONFIG_NEEDED, &cam->flags);
- else
- clear_bit(CF_CONFIG_NEEDED, &cam->flags);
-}
-
-
-
-
-/*
- * Debugging and related.
- */
-#define cam_err(cam, fmt, arg...) \
- dev_err(&(cam)->pdev->dev, fmt, ##arg);
-#define cam_warn(cam, fmt, arg...) \
- dev_warn(&(cam)->pdev->dev, fmt, ##arg);
-#define cam_dbg(cam, fmt, arg...) \
- dev_dbg(&(cam)->pdev->dev, fmt, ##arg);
-
-
-/* ---------------------------------------------------------------------*/
-/*
- * 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
- */
-static inline void cafe_reg_write(struct cafe_camera *cam, unsigned int reg,
- unsigned int val)
-{
- iowrite32(val, cam->regs + reg);
-}
-
-static inline unsigned int cafe_reg_read(struct cafe_camera *cam,
- unsigned int reg)
-{
- return ioread32(cam->regs + reg);
-}
-
-
-static inline void cafe_reg_write_mask(struct cafe_camera *cam, unsigned int reg,
- unsigned int val, unsigned int mask)
-{
- unsigned int v = cafe_reg_read(cam, reg);
-
- v = (v & ~mask) | (val & mask);
- cafe_reg_write(cam, reg, v);
-}
-
-static inline void cafe_reg_clear_bit(struct cafe_camera *cam,
- unsigned int reg, unsigned int val)
-{
- cafe_reg_write_mask(cam, reg, 0, val);
-}
-
-static inline void cafe_reg_set_bit(struct cafe_camera *cam,
- unsigned int reg, unsigned int val)
-{
- cafe_reg_write_mask(cam, reg, val, val);
-}
-
-
-
-/* -------------------------------------------------------------------- */
-/*
- * The I2C/SMBUS interface to the camera itself starts here. The
- * controller handles SMBUS itself, presenting a relatively simple register
- * interface; all we have to do is to tell it where to route the data.
- */
-#define CAFE_SMBUS_TIMEOUT (HZ) /* generous */
-
-static int cafe_smbus_write_done(struct cafe_camera *cam)
-{
- unsigned long flags;
- int c1;
-
- /*
- * We must delay after the interrupt, or the controller gets confused
- * and never does give us good status. Fortunately, we don't do this
- * often.
- */
- udelay(20);
- spin_lock_irqsave(&cam->dev_lock, flags);
- c1 = cafe_reg_read(cam, REG_TWSIC1);
- spin_unlock_irqrestore(&cam->dev_lock, flags);
- return (c1 & (TWSIC1_WSTAT|TWSIC1_ERROR)) != TWSIC1_WSTAT;
-}
-
-static int cafe_smbus_write_data(struct cafe_camera *cam,
- u16 addr, u8 command, u8 value)
-{
- unsigned int rval;
- unsigned long flags;
-
- spin_lock_irqsave(&cam->dev_lock, flags);
- rval = TWSIC0_EN | ((addr << TWSIC0_SID_SHIFT) & TWSIC0_SID);
- rval |= TWSIC0_OVMAGIC; /* Make OV sensors work */
- /*
- * Marvell sez set clkdiv to all 1's for now.
- */
- rval |= TWSIC0_CLKDIV;
- cafe_reg_write(cam, REG_TWSIC0, rval);
- (void) cafe_reg_read(cam, REG_TWSIC1); /* force write */
- rval = value | ((command << TWSIC1_ADDR_SHIFT) & TWSIC1_ADDR);
- cafe_reg_write(cam, REG_TWSIC1, rval);
- spin_unlock_irqrestore(&cam->dev_lock, flags);
- mdelay(2); /* It'll probably take about 900µs anyway, and the
- CAFÉ is apparently quite sensitive to being poked
- at this point. If we can work out precisely what's
- going on and reduce this delay, it would be nice. */
-
- wait_event_timeout(cam->smbus_wait, cafe_smbus_write_done(cam),
- CAFE_SMBUS_TIMEOUT);
- spin_lock_irqsave(&cam->dev_lock, flags);
- rval = cafe_reg_read(cam, REG_TWSIC1);
- spin_unlock_irqrestore(&cam->dev_lock, flags);
-
- if (rval & TWSIC1_WSTAT) {
- cam_err(cam, "SMBUS write (%02x/%02x/%02x) timed out\n", addr,
- command, value);
- return -EIO;
- }
- if (rval & TWSIC1_ERROR) {
- cam_err(cam, "SMBUS write (%02x/%02x/%02x) error\n", addr,
- command, value);
- return -EIO;
- }
- return 0;
-}
-
-
-
-static int cafe_smbus_read_done(struct cafe_camera *cam)
-{
- unsigned long flags;
- int c1;
-
- /*
- * We must delay after the interrupt, or the controller gets confused
- * and never does give us good status. Fortunately, we don't do this
- * often.
- */
- udelay(20);
- spin_lock_irqsave(&cam->dev_lock, flags);
- c1 = cafe_reg_read(cam, REG_TWSIC1);
- spin_unlock_irqrestore(&cam->dev_lock, flags);
- return c1 & (TWSIC1_RVALID|TWSIC1_ERROR);
-}
-
-
-
-static int cafe_smbus_read_data(struct cafe_camera *cam,
- u16 addr, u8 command, u8 *value)
-{
- unsigned int rval;
- unsigned long flags;
-
- spin_lock_irqsave(&cam->dev_lock, flags);
- rval = TWSIC0_EN | ((addr << TWSIC0_SID_SHIFT) & TWSIC0_SID);
- rval |= TWSIC0_OVMAGIC; /* Make OV sensors work */
- /*
- * Marvel sez set clkdiv to all 1's for now.
- */
- rval |= TWSIC0_CLKDIV;
- cafe_reg_write(cam, REG_TWSIC0, rval);
- (void) cafe_reg_read(cam, REG_TWSIC1); /* force write */
- rval = TWSIC1_READ | ((command << TWSIC1_ADDR_SHIFT) & TWSIC1_ADDR);
- cafe_reg_write(cam, REG_TWSIC1, rval);
- spin_unlock_irqrestore(&cam->dev_lock, flags);
-
- wait_event_timeout(cam->smbus_wait,
- cafe_smbus_read_done(cam), CAFE_SMBUS_TIMEOUT);
- spin_lock_irqsave(&cam->dev_lock, flags);
- rval = cafe_reg_read(cam, REG_TWSIC1);
- spin_unlock_irqrestore(&cam->dev_lock, flags);
-
- if (rval & TWSIC1_ERROR) {
- cam_err(cam, "SMBUS read (%02x/%02x) error\n", addr, command);
- return -EIO;
- }
- if (! (rval & TWSIC1_RVALID)) {
- cam_err(cam, "SMBUS read (%02x/%02x) timed out\n", addr,
- command);
- return -EIO;
- }
- *value = rval & 0xff;
- return 0;
-}
-
-/*
- * Perform a transfer over SMBUS. This thing is called under
- * the i2c bus lock, so we shouldn't race with ourselves...
- */
-static int cafe_smbus_xfer(struct i2c_adapter *adapter, u16 addr,
- unsigned short flags, char rw, u8 command,
- int size, union i2c_smbus_data *data)
-{
- struct cafe_camera *cam = i2c_get_adapdata(adapter);
- 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.
- */
- if (size != I2C_SMBUS_BYTE_DATA) {
- cam_err(cam, "funky xfer size %d\n", size);
- return -EINVAL;
- }
-
- if (rw == I2C_SMBUS_WRITE)
- ret = cafe_smbus_write_data(cam, addr, command, data->byte);
- else if (rw == I2C_SMBUS_READ)
- ret = cafe_smbus_read_data(cam, addr, command, &data->byte);
- return ret;
-}
-
-
-static void cafe_smbus_enable_irq(struct cafe_camera *cam)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&cam->dev_lock, flags);
- cafe_reg_set_bit(cam, REG_IRQMASK, TWSIIRQS);
- spin_unlock_irqrestore(&cam->dev_lock, flags);
-}
-
-static u32 cafe_smbus_func(struct i2c_adapter *adapter)
-{
- return I2C_FUNC_SMBUS_READ_BYTE_DATA |
- I2C_FUNC_SMBUS_WRITE_BYTE_DATA;
-}
-
-static struct i2c_algorithm cafe_smbus_algo = {
- .smbus_xfer = cafe_smbus_xfer,
- .functionality = cafe_smbus_func
-};
-
-/* 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");
- adap->dev.parent = &cam->pdev->dev;
- i2c_set_adapdata(adap, cam);
- ret = i2c_add_adapter(adap);
- if (ret)
- printk(KERN_ERR "Unable to register cafe i2c adapter\n");
- return ret;
-}
-
-static void cafe_smbus_shutdown(struct cafe_camera *cam)
-{
- i2c_del_adapter(&cam->i2c_adapter);
-}
-
-
-/* ------------------------------------------------------------------- */
-/*
- * Deal with the controller.
- */
-
-/*
- * Do everything we think we need to have the interface operating
- * according to the desired format.
- */
-static void cafe_ctlr_dma(struct cafe_camera *cam)
-{
- /*
- * Store the first two Y buffers (we aren't supporting
- * planar formats for now, so no UV bufs). Then either
- * set the third if it exists, or tell the controller
- * to just use two.
- */
- cafe_reg_write(cam, REG_Y0BAR, cam->dma_handles[0]);
- cafe_reg_write(cam, REG_Y1BAR, cam->dma_handles[1]);
- if (cam->nbufs > 2) {
- cafe_reg_write(cam, REG_Y2BAR, cam->dma_handles[2]);
- cafe_reg_clear_bit(cam, REG_CTRL1, C1_TWOBUFS);
- }
- else
- cafe_reg_set_bit(cam, REG_CTRL1, C1_TWOBUFS);
- cafe_reg_write(cam, REG_UBAR, 0); /* 32 bits only for now */
-}
-
-static void cafe_ctlr_image(struct cafe_camera *cam)
-{
- int imgsz;
- struct v4l2_pix_format *fmt = &cam->pix_format;
-
- imgsz = ((fmt->height << IMGSZ_V_SHIFT) & IMGSZ_V_MASK) |
- (fmt->bytesperline & IMGSZ_H_MASK);
- cafe_reg_write(cam, REG_IMGSIZE, imgsz);
- cafe_reg_write(cam, REG_IMGOFFSET, 0);
- /* YPITCH just drops the last two bits */
- cafe_reg_write_mask(cam, REG_IMGPITCH, fmt->bytesperline,
- IMGP_YP_MASK);
- /*
- * Tell the controller about the image format we are using.
- */
- switch (cam->pix_format.pixelformat) {
- case V4L2_PIX_FMT_YUYV:
- cafe_reg_write_mask(cam, REG_CTRL0,
- C0_DF_YUV|C0_YUV_PACKED|C0_YUVE_YUYV,
- C0_DF_MASK);
- break;
-
- case V4L2_PIX_FMT_RGB444:
- cafe_reg_write_mask(cam, REG_CTRL0,
- C0_DF_RGB|C0_RGBF_444|C0_RGB4_XRGB,
- C0_DF_MASK);
- /* Alpha value? */
- break;
-
- case V4L2_PIX_FMT_RGB565:
- cafe_reg_write_mask(cam, REG_CTRL0,
- C0_DF_RGB|C0_RGBF_565|C0_RGB5_BGGR,
- C0_DF_MASK);
- break;
-
- default:
- cam_err(cam, "Unknown format %x\n", cam->pix_format.pixelformat);
- break;
- }
- /*
- * Make sure it knows we want to use hsync/vsync.
- */
- cafe_reg_write_mask(cam, REG_CTRL0, C0_SIF_HVSYNC,
- C0_SIFM_MASK);
-}
-
-
-/*
- * Configure the controller for operation; caller holds the
- * device mutex.
- */
-static int cafe_ctlr_configure(struct cafe_camera *cam)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&cam->dev_lock, flags);
- cafe_ctlr_dma(cam);
- cafe_ctlr_image(cam);
- cafe_set_config_needed(cam, 0);
- spin_unlock_irqrestore(&cam->dev_lock, flags);
- return 0;
-}
-
-static void cafe_ctlr_irq_enable(struct cafe_camera *cam)
-{
- /*
- * Clear any pending interrupts, since we do not
- * expect to have I/O active prior to enabling.
- */
- cafe_reg_write(cam, REG_IRQSTAT, FRAMEIRQS);
- cafe_reg_set_bit(cam, REG_IRQMASK, FRAMEIRQS);
-}
-
-static void cafe_ctlr_irq_disable(struct cafe_camera *cam)
-{
- cafe_reg_clear_bit(cam, REG_IRQMASK, FRAMEIRQS);
-}
-
-/*
- * Make the controller start grabbing images. Everything must
- * be set up before doing this.
- */
-static void cafe_ctlr_start(struct cafe_camera *cam)
-{
- /* set_bit performs a read, so no other barrier should be
- needed here */
- cafe_reg_set_bit(cam, REG_CTRL0, C0_ENABLE);
-}
-
-static void cafe_ctlr_stop(struct cafe_camera *cam)
-{
- cafe_reg_clear_bit(cam, REG_CTRL0, C0_ENABLE);
-}
-
-static void cafe_ctlr_init(struct cafe_camera *cam)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&cam->dev_lock, flags);
- /*
- * Added magic to bring up the hardware on the B-Test board
- */
- cafe_reg_write(cam, 0x3038, 0x8);
- cafe_reg_write(cam, 0x315c, 0x80008);
- /*
- * Go through the dance needed to wake the device up.
- * Note that these registers are global and shared
- * with the NAND and SD devices. Interaction between the
- * three still needs to be examined.
- */
- 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);
- /*
- * Here we must wait a bit for the controller to come around.
- */
- spin_unlock_irqrestore(&cam->dev_lock, flags);
- mdelay(5); /* FIXME revisit this */
- 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);
- /*
- * Make sure it's not powered down.
- */
- cafe_reg_clear_bit(cam, REG_CTRL1, C1_PWRDWN);
- /*
- * Turn off the enable bit. It sure should be off anyway,
- * but it's good to be sure.
- */
- cafe_reg_clear_bit(cam, REG_CTRL0, C0_ENABLE);
- /*
- * Mask all interrupts.
- */
- cafe_reg_write(cam, REG_IRQMASK, 0);
- /*
- * Clock the sensor appropriately. Controller clock should
- * be 48MHz, sensor "typical" value is half that.
- */
- cafe_reg_write_mask(cam, REG_CLKCTRL, 2, CLK_DIV_MASK);
- spin_unlock_irqrestore(&cam->dev_lock, flags);
-}
-
-
-/*
- * Stop the controller, and don't return until we're really sure that no
- * further DMA is going on.
- */
-static void cafe_ctlr_stop_dma(struct cafe_camera *cam)
-{
- unsigned long flags;
-
- /*
- * Theory: stop the camera controller (whether it is operating
- * or not). Delay briefly just in case we race with the SOF
- * interrupt, then wait until no DMA is active.
- */
- spin_lock_irqsave(&cam->dev_lock, flags);
- cafe_ctlr_stop(cam);
- spin_unlock_irqrestore(&cam->dev_lock, flags);
- mdelay(1);
- wait_event_timeout(cam->iowait,
- !test_bit(CF_DMA_ACTIVE, &cam->flags), HZ);
- if (test_bit(CF_DMA_ACTIVE, &cam->flags))
- cam_err(cam, "Timeout waiting for DMA to end\n");
- /* This would be bad news - what now? */
- spin_lock_irqsave(&cam->dev_lock, flags);
- cam->state = S_IDLE;
- cafe_ctlr_irq_disable(cam);
- spin_unlock_irqrestore(&cam->dev_lock, flags);
-}
-
-/*
- * Power up and down.
- */
-static void cafe_ctlr_power_up(struct cafe_camera *cam)
-{
- unsigned long flags;
-
- 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 */
- cafe_reg_write(cam, REG_GPR, GPR_C1EN|GPR_C0EN|GPR_C0);
-// 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)
-{
- unsigned long flags;
-
- 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);
-}
-
-/*
- * We have found the sensor on the i2c. Let's try to have a
- * conversation.
- */
-static int cafe_cam_init(struct cafe_camera *cam)
-{
- struct v4l2_chip_ident chip = { V4L2_CHIP_MATCH_I2C_ADDR, 0, 0, 0 };
- int ret;
-
- mutex_lock(&cam->s_mutex);
- if (cam->state != S_NOTREADY)
- cam_warn(cam, "Cam init with device in funky state %d",
- cam->state);
- ret = __cafe_cam_reset(cam);
- if (ret)
- goto out;
- chip.match_chip = cam->sensor->addr;
- ret = __cafe_cam_cmd(cam, VIDIOC_G_CHIP_IDENT, &chip);
- if (ret)
- goto out;
- cam->sensor_type = chip.ident;
-// if (cam->sensor->addr != OV7xx0_SID) {
- if (cam->sensor_type != V4L2_IDENT_OV7670) {
- cam_err(cam, "Unsupported sensor type %d", cam->sensor->addr);
- ret = -EINVAL;
- goto out;
- }
-/* Get/set parameters? */
- ret = 0;
- cam->state = S_IDLE;
- out:
- cafe_ctlr_power_down(cam);
- mutex_unlock(&cam->s_mutex);
- return ret;
-}
-
-/*
- * Configure the sensor to match the parameters we have. Caller should
- * hold s_mutex
- */
-static int cafe_cam_set_flip(struct cafe_camera *cam)
-{
- struct v4l2_control ctrl;
-
- memset(&ctrl, 0, sizeof(ctrl));
- ctrl.id = V4L2_CID_VFLIP;
- ctrl.value = flip;
- return __cafe_cam_cmd(cam, VIDIOC_S_CTRL, &ctrl);
-}
-
-
-static int cafe_cam_configure(struct cafe_camera *cam)
-{
- struct v4l2_format fmt;
- int ret, zero = 0;
-
- fmt.fmt.pix = cam->pix_format;
- ret = __cafe_cam_cmd(cam, VIDIOC_INT_INIT, &zero);
- if (ret == 0)
- ret = __cafe_cam_cmd(cam, VIDIOC_S_FMT, &fmt);
- /*
- * OV7670 does weird things if flip is set *before* format...
- */
- ret += cafe_cam_set_flip(cam);
- return ret;
-}
-
-/* -------------------------------------------------------------------- */
-/*
- * DMA buffer management. These functions need s_mutex held.
- */
-
-/* FIXME: this is inefficient as hell, since dma_alloc_coherent just
- * does a get_free_pages() call, and we waste a good chunk of an orderN
- * allocation. Should try to allocate the whole set in one chunk.
- */
-static int cafe_alloc_dma_bufs(struct cafe_camera *cam, int loadtime)
-{
- int i;
-
- cafe_set_config_needed(cam, 1);
- if (loadtime)
- cam->dma_buf_size = dma_buf_size;
- else
- cam->dma_buf_size = cam->pix_format.sizeimage;
- if (n_dma_bufs > 3)
- n_dma_bufs = 3;
-
- cam->nbufs = 0;
- for (i = 0; i < n_dma_bufs; i++) {
- cam->dma_bufs[i] = dma_alloc_coherent(&cam->pdev->dev,
- cam->dma_buf_size, cam->dma_handles + i,
- GFP_KERNEL);
- if (cam->dma_bufs[i] == NULL) {
- cam_warn(cam, "Failed to allocate DMA buffer\n");
- break;
- }
- /* For debug, remove eventually */
- memset(cam->dma_bufs[i], 0xcc, cam->dma_buf_size);
- (cam->nbufs)++;
- }
-
- switch (cam->nbufs) {
- case 1:
- dma_free_coherent(&cam->pdev->dev, cam->dma_buf_size,
- cam->dma_bufs[0], cam->dma_handles[0]);
- cam->nbufs = 0;
- case 0:
- cam_err(cam, "Insufficient DMA buffers, cannot operate\n");
- return -ENOMEM;
-
- case 2:
- if (n_dma_bufs > 2)
- cam_warn(cam, "Will limp along with only 2 buffers\n");
- break;
- }
- return 0;
-}
-
-static void cafe_free_dma_bufs(struct cafe_camera *cam)
-{
- int i;
-
- for (i = 0; i < cam->nbufs; i++) {
- dma_free_coherent(&cam->pdev->dev, cam->dma_buf_size,
- cam->dma_bufs[i], cam->dma_handles[i]);
- cam->dma_bufs[i] = NULL;
- }
- cam->nbufs = 0;
-}
-
-
-
-
-
-/* ----------------------------------------------------------------------- */
-/*
- * Here starts the V4L2 interface code.
- */
-
-/*
- * Read an image from the device.
- */
-static ssize_t cafe_deliver_buffer(struct cafe_camera *cam,
- char __user *buffer, size_t len, loff_t *pos)
-{
- int bufno;
- unsigned long flags;
-
- spin_lock_irqsave(&cam->dev_lock, flags);
- if (cam->next_buf < 0) {
- cam_err(cam, "deliver_buffer: No next buffer\n");
- spin_unlock_irqrestore(&cam->dev_lock, flags);
- return -EIO;
- }
- bufno = cam->next_buf;
- clear_bit(bufno, &cam->flags);
- if (++(cam->next_buf) >= cam->nbufs)
- cam->next_buf = 0;
- if (! test_bit(cam->next_buf, &cam->flags))
- cam->next_buf = -1;
- cam->specframes = 0;
- spin_unlock_irqrestore(&cam->dev_lock, flags);
-
- if (len > cam->pix_format.sizeimage)
- len = cam->pix_format.sizeimage;
- if (copy_to_user(buffer, cam->dma_bufs[bufno], len))
- return -EFAULT;
- (*pos) += len;
- return len;
-}
-
-/*
- * Get everything ready, and start grabbing frames.
- */
-static int cafe_read_setup(struct cafe_camera *cam, enum cafe_state state)
-{
- int ret;
- unsigned long flags;
-
- /*
- * Configuration. If we still don't have DMA buffers,
- * make one last, desperate attempt.
- */
- if (cam->nbufs == 0)
- if (cafe_alloc_dma_bufs(cam, 0))
- return -ENOMEM;
-
- if (cafe_needs_config(cam)) {
- cafe_cam_configure(cam);
- ret = cafe_ctlr_configure(cam);
- if (ret)
- return ret;
- }
-
- /*
- * Turn it loose.
- */
- spin_lock_irqsave(&cam->dev_lock, flags);
- cafe_reset_buffers(cam);
- cafe_ctlr_irq_enable(cam);
- cam->state = state;
- cafe_ctlr_start(cam);
- spin_unlock_irqrestore(&cam->dev_lock, flags);
- return 0;
-}
-
-
-static ssize_t cafe_v4l_read(struct file *filp,
- char __user *buffer, size_t len, loff_t *pos)
-{
- struct cafe_camera *cam = filp->private_data;
- int ret = 0;
-
- /*
- * Perhaps we're in speculative read mode and already
- * have data?
- */
- mutex_lock(&cam->s_mutex);
- if (cam->state == S_SPECREAD) {
- if (cam->next_buf >= 0) {
- ret = cafe_deliver_buffer(cam, buffer, len, pos);
- if (ret != 0)
- goto out_unlock;
- }
- } else if (cam->state == S_FLAKED || cam->state == S_NOTREADY) {
- ret = -EIO;
- goto out_unlock;
- } else if (cam->state != S_IDLE) {
- ret = -EBUSY;
- goto out_unlock;
- }
-
- /*
- * v4l2: multiple processes can open the device, but only
- * one gets to grab data from it.
- */
- if (cam->owner && cam->owner != filp) {
- ret = -EBUSY;
- goto out_unlock;
- }
- cam->owner = filp;
-
- /*
- * Do setup if need be.
- */
- if (cam->state != S_SPECREAD) {
- ret = cafe_read_setup(cam, S_SINGLEREAD);
- if (ret)
- goto out_unlock;
- }
- /*
- * Wait for something to happen. This should probably
- * be interruptible (FIXME).
- */
- wait_event_timeout(cam->iowait, cam->next_buf >= 0, HZ);
- if (cam->next_buf < 0) {
- cam_err(cam, "read() operation timed out\n");
- cafe_ctlr_stop_dma(cam);
- ret = -EIO;
- goto out_unlock;
- }
- /*
- * Give them their data and we should be done.
- */
- ret = cafe_deliver_buffer(cam, buffer, len, pos);
-
- out_unlock:
- mutex_unlock(&cam->s_mutex);
- return ret;
-}
-
-
-
-
-
-
-
-
-/*
- * Streaming I/O support.
- */
-
-
-
-static int cafe_vidioc_streamon(struct file *filp, void *priv,
- enum v4l2_buf_type type)
-{
- struct cafe_camera *cam = filp->private_data;
- int ret = -EINVAL;
-
- if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
- goto out;
- mutex_lock(&cam->s_mutex);
- if (cam->state != S_IDLE || cam->n_sbufs == 0)
- goto out_unlock;
-
- cam->sequence = 0;
- ret = cafe_read_setup(cam, S_STREAMING);
-
- out_unlock:
- mutex_unlock(&cam->s_mutex);
- out:
- return ret;
-}
-
-
-static int cafe_vidioc_streamoff(struct file *filp, void *priv,
- enum v4l2_buf_type type)
-{
- struct cafe_camera *cam = filp->private_data;
- int ret = -EINVAL;
-
- if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
- goto out;
- mutex_lock(&cam->s_mutex);
- if (cam->state != S_STREAMING)
- goto out_unlock;
-
- cafe_ctlr_stop_dma(cam);
- ret = 0;
-
- out_unlock:
- mutex_unlock(&cam->s_mutex);
- out:
- return ret;
-}
-
-
-
-static int cafe_setup_siobuf(struct cafe_camera *cam, int index)
-{
- struct cafe_sio_buffer *buf = cam->sb_bufs + index;
-
- INIT_LIST_HEAD(&buf->list);
- buf->v4lbuf.length = PAGE_ALIGN(cam->pix_format.sizeimage);
- buf->buffer = vmalloc_user(buf->v4lbuf.length);
- if (buf->buffer == NULL)
- return -ENOMEM;
- buf->mapcount = 0;
- buf->cam = cam;
-
- buf->v4lbuf.index = index;
- buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- 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
- * 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.
- */
- buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
- return 0;
-}
-
-static int cafe_free_sio_buffers(struct cafe_camera *cam)
-{
- int i;
-
- /*
- * If any buffers are mapped, we cannot free them at all.
- */
- for (i = 0; i < cam->n_sbufs; i++)
- if (cam->sb_bufs[i].mapcount > 0)
- return -EBUSY;
- /*
- * OK, let's do it.
- */
- for (i = 0; i < cam->n_sbufs; i++)
- vfree(cam->sb_bufs[i].buffer);
- cam->n_sbufs = 0;
- kfree(cam->sb_bufs);
- cam->sb_bufs = NULL;
- INIT_LIST_HEAD(&cam->sb_avail);
- INIT_LIST_HEAD(&cam->sb_full);
- return 0;
-}
-
-
-
-static int cafe_vidioc_reqbufs(struct file *filp, void *priv,
- struct v4l2_requestbuffers *req)
-{
- struct cafe_camera *cam = filp->private_data;
- 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 they ask for zero buffers, they really want us to stop streaming
- * (if it's happening) and free everything. Should we check owner?
- */
- mutex_lock(&cam->s_mutex);
- if (req->count == 0) {
- if (cam->state == S_STREAMING)
- cafe_ctlr_stop_dma(cam);
- ret = cafe_free_sio_buffers (cam);
- goto out;
- }
- /*
- * Device needs to be idle and working. We *could* try to do the
- * right thing in S_SPECREAD by shutting things down, but it
- * probably doesn't matter.
- */
- if (cam->state != S_IDLE || (cam->owner && cam->owner != filp)) {
- ret = -EBUSY;
- goto out;
- }
- cam->owner = filp;
-
- if (req->count < min_buffers)
- req->count = min_buffers;
- else if (req->count > max_buffers)
- req->count = max_buffers;
- if (cam->n_sbufs > 0) {
- ret = cafe_free_sio_buffers(cam);
- if (ret)
- goto out;
- }
-
- cam->sb_bufs = kzalloc(req->count*sizeof(struct cafe_sio_buffer),
- GFP_KERNEL);
- if (cam->sb_bufs == NULL) {
- ret = -ENOMEM;
- goto out;
- }
- for (cam->n_sbufs = 0; cam->n_sbufs < req->count; (cam->n_sbufs++)) {
- ret = cafe_setup_siobuf(cam, cam->n_sbufs);
- if (ret)
- break;
- }
-
- if (cam->n_sbufs == 0) /* no luck at all - ret already set */
- kfree(cam->sb_bufs);
- req->count = cam->n_sbufs; /* In case of partial success */
-
- out:
- mutex_unlock(&cam->s_mutex);
- return ret;
-}
-
-
-static int cafe_vidioc_querybuf(struct file *filp, void *priv,
- struct v4l2_buffer *buf)
-{
- struct cafe_camera *cam = filp->private_data;
- 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)
- goto out;
- *buf = cam->sb_bufs[buf->index].v4lbuf;
- ret = 0;
- out:
- mutex_unlock(&cam->s_mutex);
- return ret;
-}
-
-static int cafe_vidioc_qbuf(struct file *filp, void *priv,
- struct v4l2_buffer *buf)
-{
- struct cafe_camera *cam = filp->private_data;
- struct cafe_sio_buffer *sbuf;
- int ret = -EINVAL;
- 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)
- goto out;
- sbuf = cam->sb_bufs + buf->index;
- if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED) {
- ret = 0; /* Already queued?? */
- goto out;
- }
- if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_DONE) {
- /* Spec doesn't say anything, seems appropriate tho */
- ret = -EBUSY;
- goto out;
- }
- sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
- spin_lock_irqsave(&cam->dev_lock, flags);
- list_add(&sbuf->list, &cam->sb_avail);
- spin_unlock_irqrestore(&cam->dev_lock, flags);
- ret = 0;
- out:
- mutex_unlock(&cam->s_mutex);
- return ret;
-}
-
-static int cafe_vidioc_dqbuf(struct file *filp, void *priv,
- struct v4l2_buffer *buf)
-{
- struct cafe_camera *cam = filp->private_data;
- struct cafe_sio_buffer *sbuf;
- int ret = -EINVAL;
- 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) {
- ret = -EAGAIN;
- goto out_unlock;
- }
-
- while (list_empty(&cam->sb_full) && cam->state == S_STREAMING) {
- mutex_unlock(&cam->s_mutex);
- if (wait_event_interruptible(cam->iowait,
- !list_empty(&cam->sb_full))) {
- ret = -ERESTARTSYS;
- goto out;
- }
- mutex_lock(&cam->s_mutex);
- }
-
- if (cam->state != S_STREAMING)
- ret = -EINTR;
- else {
- spin_lock_irqsave(&cam->dev_lock, flags);
- /* Should probably recheck !list_empty() here */
- sbuf = list_entry(cam->sb_full.next,
- struct cafe_sio_buffer, list);
- list_del_init(&sbuf->list);
- spin_unlock_irqrestore(&cam->dev_lock, flags);
- sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
- *buf = sbuf->v4lbuf;
- ret = 0;
- }
-
- out_unlock:
- mutex_unlock(&cam->s_mutex);
- out:
- return ret;
-}
-
-
-
-static void cafe_v4l_vm_open(struct vm_area_struct *vma)
-{
- struct cafe_sio_buffer *sbuf = vma->vm_private_data;
- /*
- * Locking: done under mmap_sem, so we don't need to
- * go back to the camera lock here.
- */
- sbuf->mapcount++;
-}
-
-
-static void cafe_v4l_vm_close(struct vm_area_struct *vma)
-{
- struct cafe_sio_buffer *sbuf = vma->vm_private_data;
-
- mutex_lock(&sbuf->cam->s_mutex);
- sbuf->mapcount--;
- /* Docs say we should stop I/O too... */
- if (sbuf->mapcount == 0)
- sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
- mutex_unlock(&sbuf->cam->s_mutex);
-}
-
-static struct vm_operations_struct cafe_v4l_vm_ops = {
- .open = cafe_v4l_vm_open,
- .close = cafe_v4l_vm_close
-};
-
-
-static int cafe_v4l_mmap(struct file *filp, struct vm_area_struct *vma)
-{
- struct cafe_camera *cam = filp->private_data;
- unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
- int ret = -EINVAL;
- int i;
- struct cafe_sio_buffer *sbuf = NULL;
-
- if (! (vma->vm_flags & VM_WRITE) || ! (vma->vm_flags & VM_SHARED))
- return -EINVAL;
- /*
- * Find the buffer they are looking for.
- */
- mutex_lock(&cam->s_mutex);
- for (i = 0; i < cam->n_sbufs; i++)
- if (cam->sb_bufs[i].v4lbuf.m.offset == offset) {
- sbuf = cam->sb_bufs + i;
- break;
- }
- if (sbuf == NULL)
- goto out;
-
- ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
- if (ret)
- goto out;
- vma->vm_flags |= VM_DONTEXPAND;
- vma->vm_private_data = sbuf;
- vma->vm_ops = &cafe_v4l_vm_ops;
- sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
- cafe_v4l_vm_open(vma);
- ret = 0;
- out:
- mutex_unlock(&cam->s_mutex);
- return ret;
-}
-
-
-
-static int cafe_v4l_open(struct inode *inode, struct file *filp)
-{
- struct cafe_camera *cam;
-
- cam = cafe_find_dev(iminor(inode));
- if (cam == NULL)
- return -ENODEV;
- filp->private_data = cam;
-
- mutex_lock(&cam->s_mutex);
- if (cam->users == 0) {
- cafe_ctlr_power_up(cam);
- __cafe_cam_reset(cam);
- cafe_set_config_needed(cam, 1);
- /* FIXME make sure this is complete */
- }
- (cam->users)++;
- mutex_unlock(&cam->s_mutex);
- return 0;
-}
-
-
-static int cafe_v4l_release(struct inode *inode, struct file *filp)
-{
- struct cafe_camera *cam = filp->private_data;
-
- mutex_lock(&cam->s_mutex);
- (cam->users)--;
- if (filp == cam->owner) {
- cafe_ctlr_stop_dma(cam);
- cafe_free_sio_buffers(cam);
- cam->owner = NULL;
- }
- if (cam->users == 0) {
- cafe_ctlr_power_down(cam);
- if (alloc_bufs_at_read)
- cafe_free_dma_bufs(cam);
- }
- mutex_unlock(&cam->s_mutex);
- return 0;
-}
-
-
-
-static unsigned int cafe_v4l_poll(struct file *filp,
- struct poll_table_struct *pt)
-{
- struct cafe_camera *cam = filp->private_data;
-
- poll_wait(filp, &cam->iowait, pt);
- if (cam->next_buf >= 0)
- return POLLIN | POLLRDNORM;
- return 0;
-}
-
-
-
-static int cafe_vidioc_queryctrl(struct file *filp, void *priv,
- struct v4l2_queryctrl *qc)
-{
- struct cafe_camera *cam = filp->private_data;
- int ret;
-
- mutex_lock(&cam->s_mutex);
- ret = __cafe_cam_cmd(cam, VIDIOC_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;
- int ret;
-
- mutex_lock(&cam->s_mutex);
- ret = __cafe_cam_cmd(cam, VIDIOC_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;
- int ret;
-
- mutex_lock(&cam->s_mutex);
- ret = __cafe_cam_cmd(cam, VIDIOC_S_CTRL, ctrl);
- mutex_unlock(&cam->s_mutex);
- return ret;
-}
-
-
-
-
-
-static int cafe_vidioc_querycap(struct file *file, void *priv,
- struct v4l2_capability *cap)
-{
- strcpy(cap->driver, "cafe_ccic");
- strcpy(cap->card, "cafe_ccic");
- cap->version = CAFE_VERSION;
- cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
- V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
- return 0;
-}
-
-
-/*
- * The default format we use until somebody says otherwise.
- */
-static struct v4l2_pix_format cafe_def_pix_format = {
- .width = VGA_WIDTH,
- .height = VGA_HEIGHT,
- .pixelformat = V4L2_PIX_FMT_YUYV,
- .field = V4L2_FIELD_NONE,
- .bytesperline = VGA_WIDTH*2,
- .sizeimage = VGA_WIDTH*VGA_HEIGHT*2,
-};
-
-static int cafe_vidioc_enum_fmt_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);
- mutex_unlock(&cam->s_mutex);
- return ret;
-}
-
-
-static int cafe_vidioc_try_fmt_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);
- mutex_unlock(&cam->s_mutex);
- return ret;
-}
-
-static int cafe_vidioc_s_fmt_cap(struct file *filp, void *priv,
- struct v4l2_format *fmt)
-{
- struct cafe_camera *cam = priv;
- int ret;
-
- /*
- * Can't do anything if the device is not idle
- * Also can't if there are streaming buffers in place.
- */
- if (cam->state != S_IDLE || cam->n_sbufs > 0)
- return -EBUSY;
- /*
- * See if the formatting works in principle.
- */
- ret = cafe_vidioc_try_fmt_cap(filp, priv, fmt);
- if (ret)
- return ret;
- /*
- * Now we start to change things for real, so let's do it
- * under lock.
- */
- mutex_lock(&cam->s_mutex);
- cam->pix_format = fmt->fmt.pix;
- /*
- * Make sure we have appropriate DMA buffers.
- */
- ret = -ENOMEM;
- if (cam->nbufs > 0 && cam->dma_buf_size < cam->pix_format.sizeimage)
- cafe_free_dma_bufs(cam);
- if (cam->nbufs == 0) {
- if (cafe_alloc_dma_bufs(cam, 0))
- goto out;
- }
- /*
- * It looks like this might work, so let's program the sensor.
- */
- ret = cafe_cam_configure(cam);
- if (! ret)
- ret = cafe_ctlr_configure(cam);
- out:
- mutex_unlock(&cam->s_mutex);
- return ret;
-}
-
-/*
- * Return our stored notion of how the camera is/should be configured.
- * 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,
- struct v4l2_format *f)
-{
- struct cafe_camera *cam = priv;
-
- f->fmt.pix = cam->pix_format;
- return 0;
-}
-
-/*
- * We only have one input - the sensor - so minimize the nonsense here.
- */
-static int cafe_vidioc_enum_input(struct file *filp, void *priv,
- struct v4l2_input *input)
-{
- if (input->index != 0)
- return -EINVAL;
-
- input->type = V4L2_INPUT_TYPE_CAMERA;
- input->std = V4L2_STD_ALL; /* Not sure what should go here */
- strcpy(input->name, "Camera");
- return 0;
-}
-
-static int cafe_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
-{
- *i = 0;
- return 0;
-}
-
-static int cafe_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
-{
- if (i != 0)
- return -EINVAL;
- return 0;
-}
-
-/* from vivi.c */
-static int cafe_vidioc_s_std(struct file *filp, void *priv, v4l2_std_id *a)
-{
- return 0;
-}
-
-/*
- * 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 = priv;
- int ret;
-
- mutex_lock(&cam->s_mutex);
- ret = __cafe_cam_cmd(cam, VIDIOC_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 = __cafe_cam_cmd(cam, VIDIOC_S_PARM, parms);
- mutex_unlock(&cam->s_mutex);
- parms->parm.capture.readbuffers = n_dma_bufs;
- return ret;
-}
-
-
-static void cafe_v4l_dev_release(struct video_device *vd)
-{
- struct cafe_camera *cam = container_of(vd, struct cafe_camera, v4ldev);
-
- kfree(cam);
-}
-
-
-/*
- * This template device holds all of those v4l2 methods; we
- * clone it for specific real devices.
- */
-
-static const struct file_operations cafe_v4l_fops = {
- .owner = THIS_MODULE,
- .open = cafe_v4l_open,
- .release = cafe_v4l_release,
- .read = cafe_v4l_read,
- .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,
-
- .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_input = cafe_vidioc_enum_input,
- .vidioc_g_input = cafe_vidioc_g_input,
- .vidioc_s_input = cafe_vidioc_s_input,
- .vidioc_s_std = cafe_vidioc_s_std,
- .vidioc_reqbufs = cafe_vidioc_reqbufs,
- .vidioc_querybuf = cafe_vidioc_querybuf,
- .vidioc_qbuf = cafe_vidioc_qbuf,
- .vidioc_dqbuf = cafe_vidioc_dqbuf,
- .vidioc_streamon = cafe_vidioc_streamon,
- .vidioc_streamoff = cafe_vidioc_streamoff,
- .vidioc_queryctrl = cafe_vidioc_queryctrl,
- .vidioc_g_ctrl = cafe_vidioc_g_ctrl,
- .vidioc_s_ctrl = cafe_vidioc_s_ctrl,
- .vidioc_g_parm = cafe_vidioc_g_parm,
- .vidioc_s_parm = cafe_vidioc_s_parm,
-};
-
-
-
-
-
-
-
-/* ---------------------------------------------------------------------- */
-/*
- * Interrupt handler stuff
- */
-
-
-
-static void cafe_frame_tasklet(unsigned long data)
-{
- struct cafe_camera *cam = (struct cafe_camera *) data;
- int i;
- unsigned long flags;
- struct cafe_sio_buffer *sbuf;
-
- spin_lock_irqsave(&cam->dev_lock, flags);
- for (i = 0; i < cam->nbufs; i++) {
- int bufno = cam->next_buf;
- if (bufno < 0) { /* "will never happen" */
- cam_err(cam, "No valid bufs in tasklet!\n");
- break;
- }
- if (++(cam->next_buf) >= cam->nbufs)
- cam->next_buf = 0;
- if (! test_bit(bufno, &cam->flags))
- continue;
- if (list_empty(&cam->sb_avail))
- break; /* Leave it valid, hope for better later */
- clear_bit(bufno, &cam->flags);
- 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))
- wake_up(&cam->iowait);
- spin_unlock_irqrestore(&cam->dev_lock, flags);
-}
-
-
-
-static void cafe_frame_complete(struct cafe_camera *cam, int frame)
-{
- /*
- * Basic frame housekeeping.
- */
- if (test_bit(frame, &cam->flags) && printk_ratelimit())
- cam_err(cam, "Frame overrun on %d, frames lost\n", frame);
- set_bit(frame, &cam->flags);
- clear_bit(CF_DMA_ACTIVE, &cam->flags);
- if (cam->next_buf < 0)
- cam->next_buf = frame;
- cam->buf_seq[frame] = ++(cam->sequence);
-
- switch (cam->state) {
- /*
- * If in single read mode, try going speculative.
- */
- case S_SINGLEREAD:
- cam->state = S_SPECREAD;
- cam->specframes = 0;
- wake_up(&cam->iowait);
- break;
-
- /*
- * If we are already doing speculative reads, and nobody is
- * reading them, just stop.
- */
- case S_SPECREAD:
- if (++(cam->specframes) >= cam->nbufs) {
- cafe_ctlr_stop(cam);
- cafe_ctlr_irq_disable(cam);
- cam->state = S_IDLE;
- }
- wake_up(&cam->iowait);
- break;
- /*
- * For the streaming case, we defer the real work to the
- * camera tasklet.
- *
- * FIXME: if the application is not consuming the buffers,
- * we should eventually put things on hold and restart in
- * vidioc_dqbuf().
- */
- case S_STREAMING:
- tasklet_schedule(&cam->s_tasklet);
- break;
-
- default:
- cam_err(cam, "Frame interrupt in non-operational state\n");
- break;
- }
-}
-
-
-
-
-static void cafe_frame_irq(struct cafe_camera *cam, unsigned int irqs)
-{
- unsigned int frame;
-
- cafe_reg_write(cam, REG_IRQSTAT, FRAMEIRQS); /* Clear'em all */
- /*
- * Handle any frame completions. There really should
- * not be more than one of these, or we have fallen
- * far behind.
- */
- for (frame = 0; frame < cam->nbufs; frame++)
- if (irqs & (IRQ_EOF0 << frame))
- cafe_frame_complete(cam, frame);
- /*
- * If a frame starts, note that we have DMA active. This
- * code assumes that we won't get multiple frame interrupts
- * at once; may want to rethink that.
- */
- if (irqs & (IRQ_SOF0 | IRQ_SOF1 | IRQ_SOF2))
- set_bit(CF_DMA_ACTIVE, &cam->flags);
-}
-
-
-
-static irqreturn_t cafe_irq(int irq, void *data)
-{
- struct cafe_camera *cam = data;
- unsigned int irqs;
-
- spin_lock(&cam->dev_lock);
- irqs = cafe_reg_read(cam, REG_IRQSTAT);
- if ((irqs & ALLIRQS) == 0) {
- spin_unlock(&cam->dev_lock);
- return IRQ_NONE;
- }
- if (irqs & FRAMEIRQS)
- cafe_frame_irq(cam, irqs);
- if (irqs & TWSIIRQS) {
- cafe_reg_write(cam, REG_IRQSTAT, TWSIIRQS);
- wake_up(&cam->smbus_wait);
- }
- spin_unlock(&cam->dev_lock);
- return IRQ_HANDLED;
-}
-
-
-/* -------------------------------------------------------------------------- */
-#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 const 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 const 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.
- */
-
-static int cafe_pci_probe(struct pci_dev *pdev,
- 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.
- */
- ret = -ENOMEM;
- cam = kzalloc(sizeof(struct cafe_camera), GFP_KERNEL);
- if (cam == NULL)
- goto out;
- 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);
- init_waitqueue_head(&cam->smbus_wait);
- init_waitqueue_head(&cam->iowait);
- cam->pdev = pdev;
- cam->pix_format = cafe_def_pix_format;
- INIT_LIST_HEAD(&cam->dev_list);
- INIT_LIST_HEAD(&cam->sb_avail);
- INIT_LIST_HEAD(&cam->sb_full);
- tasklet_init(&cam->s_tasklet, cafe_frame_tasklet, (unsigned long) cam);
- /*
- * Get set up on the PCI bus.
- */
- ret = pci_enable_device(pdev);
- if (ret)
- goto out_free;
- 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;
- }
- 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. 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;
- /*
- * 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;
- cam->v4ldev.dev = &pdev->dev;
- ret = video_register_device(&cam->v4ldev, VFL_TYPE_GRABBER, -1);
- if (ret)
- goto out_smbus;
- /*
- * If so requested, try to get our DMA buffers now.
- */
- 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:
- cafe_smbus_shutdown(cam);
- out_freeirq:
- cafe_ctlr_power_down(cam);
- free_irq(pdev->irq, cam);
- out_iounmap:
- pci_iounmap(pdev, cam->regs);
- out_free:
- kfree(cam);
- out:
- return ret;
-}
-
-
-/*
- * Shut down an initialized device
- */
-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 () */
-}
-
-
-static void cafe_pci_remove(struct pci_dev *pdev)
-{
- struct cafe_camera *cam = cafe_find_by_pdev(pdev);
-
- if (cam == NULL) {
- 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);
-/* 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 cafe_camera *cam = cafe_find_by_pdev(pdev);
- int ret;
- enum cafe_state cstate;
-
- mutex_lock(&cam->s_mutex);
- ret = pci_save_state(pdev);
- if (ret) {
- cam_warn(cam, "Unable to save PCI state\n");
- 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;
- /* hold mutex until restore */
- return 0;
-}
-
-
-static int cafe_pci_resume(struct pci_dev *pdev)
-{
- struct cafe_camera *cam = cafe_find_by_pdev(pdev);
- 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;
- }
- /* we're still holding mutex from suspend */
- cafe_ctlr_init(cam);
-
- if (cam->users > 0) {
- cafe_ctlr_power_up(cam);
- __cafe_cam_reset(cam);
- }
- else
- cafe_ctlr_power_down(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(0x11ab, 0x4100) }, /* Eventual real ID */
- { PCI_DEVICE(0x11ab, 0x4102) }, /* Really eventual real ID */
- { 0, }
-};
-
-MODULE_DEVICE_TABLE(pci, cafe_ids);
-
-static struct pci_driver cafe_pci_driver = {
- .name = "cafe1000-ccic",
- .id_table = cafe_ids,
- .probe = cafe_pci_probe,
- .remove = cafe_pci_remove,
-#ifdef CONFIG_PM
- .suspend = cafe_pci_suspend,
- .resume = cafe_pci_resume,
-#endif
-};
-
-
-
-
-static int __init cafe_init(void)
-{
- int ret;
-
- 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:
- return ret;
-}
-
-
-static void __exit cafe_exit(void)
-{
- pci_unregister_driver(&cafe_pci_driver);
- cafe_dfs_shutdown();
-}
-
-module_init(cafe_init);
-module_exit(cafe_exit);
projects / openwrt.git / commitdiff