diff options
| -rw-r--r-- | drivers/media/video/s2255drv.c | 266 |
1 files changed, 109 insertions, 157 deletions
diff --git a/drivers/media/video/s2255drv.c b/drivers/media/video/s2255drv.c index 5ecd41b3bf3e..1d8c6b4364dd 100644 --- a/drivers/media/video/s2255drv.c +++ b/drivers/media/video/s2255drv.c @@ -226,7 +226,6 @@ struct s2255_fmt; /*forward declaration */ struct s2255_dev { int frames; - int users[MAX_CHANNELS]; struct mutex lock; struct mutex open_lock; int resources[MAX_CHANNELS]; @@ -367,7 +366,6 @@ static void s2255_fillbuff(struct s2255_dev *dev, struct s2255_buffer *buf, static int s2255_set_mode(struct s2255_dev *dev, unsigned long chn, struct s2255_mode *mode); static int s2255_board_shutdown(struct s2255_dev *dev); -static void s2255_exit_v4l(struct s2255_dev *dev); static void s2255_fwload_start(struct s2255_dev *dev, int reset); static void s2255_destroy(struct kref *kref); static long s2255_vendor_req(struct s2255_dev *dev, unsigned char req, @@ -606,7 +604,6 @@ unlock: return 0; } - static const struct s2255_fmt *format_by_fourcc(int fourcc) { unsigned int i; @@ -620,9 +617,6 @@ static const struct s2255_fmt *format_by_fourcc(int fourcc) return NULL; } - - - /* video buffer vmalloc implementation based partly on VIVI driver which is * Copyright (c) 2006 by * Mauro Carvalho Chehab <mchehab--a.t--infradead.org> @@ -849,7 +843,6 @@ static int vidioc_querymenu(struct file *file, void *priv, return v4l2_ctrl_query_menu(qmenu, NULL, NULL); } - static int vidioc_querycap(struct file *file, void *priv, struct v4l2_capability *cap) { @@ -1759,31 +1752,26 @@ static int s2255_open(struct file *file) int i = 0; int cur_channel = -1; int state; - dprintk(1, "s2255: open called (dev=%s)\n", video_device_node_name(vdev)); - lock_kernel(); - - for (i = 0; i < MAX_CHANNELS; i++) { + for (i = 0; i < MAX_CHANNELS; i++) if (dev->vdev[i] == vdev) { cur_channel = i; break; } - } - - if (atomic_read(&dev->fw_data->fw_state) == S2255_FW_DISCONNECTING) { + /* + * open lock necessary to prevent multiple instances + * of v4l-conf (or other programs) from simultaneously + * reloading firmware. + */ + mutex_lock(&dev->open_lock); + state = atomic_read(&dev->fw_data->fw_state); + switch (state) { + case S2255_FW_DISCONNECTING: + mutex_unlock(&dev->open_lock); unlock_kernel(); - printk(KERN_INFO "disconnecting\n"); return -ENODEV; - } - kref_get(&dev->kref); - mutex_lock(&dev->open_lock); - - dev->users[cur_channel]++; - dprintk(4, "s2255: open_handles %d\n", dev->users[cur_channel]); - - switch (atomic_read(&dev->fw_data->fw_state)) { case S2255_FW_FAILED: s2255_dev_err(&dev->udev->dev, "firmware load failed. retrying.\n"); @@ -1794,6 +1782,8 @@ static int s2255_open(struct file *file) (atomic_read(&dev->fw_data->fw_state) == S2255_FW_DISCONNECTING)), msecs_to_jiffies(S2255_LOAD_TIMEOUT)); + /* state may have changed, re-read */ + state = atomic_read(&dev->fw_data->fw_state); break; case S2255_FW_NOTLOADED: case S2255_FW_LOADED_DSPWAIT: @@ -1806,52 +1796,44 @@ static int s2255_open(struct file *file) (atomic_read(&dev->fw_data->fw_state) == S2255_FW_DISCONNECTING)), msecs_to_jiffies(S2255_LOAD_TIMEOUT)); + /* state may have changed, re-read */ + state = atomic_read(&dev->fw_data->fw_state); break; case S2255_FW_SUCCESS: default: break; } - state = atomic_read(&dev->fw_data->fw_state); - if (state != S2255_FW_SUCCESS) { - int rc; - switch (state) { - case S2255_FW_FAILED: - printk(KERN_INFO "2255 FW load failed. %d\n", state); - rc = -ENODEV; - break; - case S2255_FW_DISCONNECTING: - printk(KERN_INFO "%s: disconnecting\n", __func__); - rc = -ENODEV; - break; - case S2255_FW_LOADED_DSPWAIT: - case S2255_FW_NOTLOADED: - printk(KERN_INFO "%s: firmware not loaded yet" - "please try again later\n", - __func__); - rc = -EAGAIN; - break; - default: - printk(KERN_INFO "%s: unknown state\n", __func__); - rc = -EFAULT; - break; - } - dev->users[cur_channel]--; - mutex_unlock(&dev->open_lock); - kref_put(&dev->kref, s2255_destroy); + mutex_unlock(&dev->open_lock); + /* state may have changed in above switch statement */ + switch (state) { + case S2255_FW_SUCCESS: + break; + case S2255_FW_FAILED: + printk(KERN_INFO "2255 firmware load failed.\n"); + unlock_kernel(); + return -ENODEV; + case S2255_FW_DISCONNECTING: + printk(KERN_INFO "%s: disconnecting\n", __func__); + unlock_kernel(); + return -ENODEV; + case S2255_FW_LOADED_DSPWAIT: + case S2255_FW_NOTLOADED: + printk(KERN_INFO "%s: firmware not loaded yet" + "please try again later\n", + __func__); + unlock_kernel(); + return -EAGAIN; + default: + printk(KERN_INFO "%s: unknown state\n", __func__); unlock_kernel(); - return rc; + return -EFAULT; } - /* allocate + initialize per filehandle data */ fh = kzalloc(sizeof(*fh), GFP_KERNEL); if (NULL == fh) { - dev->users[cur_channel]--; - mutex_unlock(&dev->open_lock); - kref_put(&dev->kref, s2255_destroy); unlock_kernel(); return -ENOMEM; } - file->private_data = fh; fh->dev = dev; fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; @@ -1866,9 +1848,8 @@ static int s2255_open(struct file *file) s2255_set_mode(dev, cur_channel, &fh->mode); dev->chn_configured[cur_channel] = 1; } - dprintk(1, "s2255drv: open dev=%s type=%s users=%d\n", - video_device_node_name(vdev), v4l2_type_names[type], - dev->users[cur_channel]); + dprintk(1, "s2255drv: open dev=%s type=%s\n", + video_device_node_name(vdev), v4l2_type_names[type]); dprintk(2, "s2255drv: open: fh=0x%08lx, dev=0x%08lx, vidq=0x%08lx\n", (unsigned long)fh, (unsigned long)dev, (unsigned long)&dev->vidq[cur_channel]); @@ -1880,8 +1861,6 @@ static int s2255_open(struct file *file) fh->type, V4L2_FIELD_INTERLACED, sizeof(struct s2255_buffer), fh); - - mutex_unlock(&dev->open_lock); unlock_kernel(); return 0; } @@ -1904,28 +1883,10 @@ static unsigned int s2255_poll(struct file *file, static void s2255_destroy(struct kref *kref) { struct s2255_dev *dev = to_s2255_dev(kref); - int i; - if (!dev) { - printk(KERN_ERR "s2255drv: kref problem\n"); - return; - } - atomic_set(&dev->fw_data->fw_state, S2255_FW_DISCONNECTING); - wake_up(&dev->fw_data->wait_fw); - for (i = 0; i < MAX_CHANNELS; i++) { - dev->setmode_ready[i] = 1; - wake_up(&dev->wait_setmode[i]); - dev->vidstatus_ready[i] = 1; - wake_up(&dev->wait_vidstatus[i]); - } - mutex_lock(&dev->open_lock); - /* reset the DSP so firmware can be reload next time */ - s2255_reset_dsppower(dev); - s2255_exit_v4l(dev); /* board shutdown stops the read pipe if it is running */ s2255_board_shutdown(dev); /* make sure firmware still not trying to load */ del_timer(&dev->timer); /* only started in .probe and .open */ - if (dev->fw_data->fw_urb) { dprintk(2, "kill fw_urb\n"); usb_kill_urb(dev->fw_data->fw_urb); @@ -1936,24 +1897,22 @@ static void s2255_destroy(struct kref *kref) release_firmware(dev->fw_data->fw); kfree(dev->fw_data->pfw_data); kfree(dev->fw_data); + /* reset the DSP so firmware can be reloaded next time */ + s2255_reset_dsppower(dev); + mutex_destroy(&dev->open_lock); + mutex_destroy(&dev->lock); usb_put_dev(dev->udev); dprintk(1, "%s", __func__); - - mutex_unlock(&dev->open_lock); kfree(dev); } -static int s2255_close(struct file *file) +static int s2255_release(struct file *file) { struct s2255_fh *fh = file->private_data; struct s2255_dev *dev = fh->dev; struct video_device *vdev = video_devdata(file); - if (!dev) return -ENODEV; - - mutex_lock(&dev->open_lock); - /* turn off stream */ if (res_check(fh)) { if (dev->b_acquire[fh->channel]) @@ -1961,15 +1920,8 @@ static int s2255_close(struct file *file) videobuf_streamoff(&fh->vb_vidq); res_free(dev, fh); } - videobuf_mmap_free(&fh->vb_vidq); - dev->users[fh->channel]--; - - mutex_unlock(&dev->open_lock); - - kref_put(&dev->kref, s2255_destroy); - dprintk(1, "s2255: close called (dev=%s, users=%d)\n", - video_device_node_name(vdev), dev->users[fh->channel]); + dprintk(1, "%s (dev=%s)\n", __func__, video_device_node_name(vdev)); kfree(fh); return 0; } @@ -1995,7 +1947,7 @@ static int s2255_mmap_v4l(struct file *file, struct vm_area_struct *vma) static const struct v4l2_file_operations s2255_fops_v4l = { .owner = THIS_MODULE, .open = s2255_open, - .release = s2255_close, + .release = s2255_release, .poll = s2255_poll, .ioctl = video_ioctl2, /* V4L2 ioctl handler */ .mmap = s2255_mmap_v4l, @@ -2031,11 +1983,19 @@ static const struct v4l2_ioctl_ops s2255_ioctl_ops = { .vidioc_enum_frameintervals = vidioc_enum_frameintervals, }; +static void s2255_video_device_release(struct video_device *vdev) +{ + struct s2255_dev *dev = video_get_drvdata(vdev); + video_device_release(vdev); + kref_put(&dev->kref, s2255_destroy); + return; +} + static struct video_device template = { .name = "s2255v", .fops = &s2255_fops_v4l, .ioctl_ops = &s2255_ioctl_ops, - .release = video_device_release, + .release = s2255_video_device_release, .tvnorms = S2255_NORMS, .current_norm = V4L2_STD_NTSC_M, }; @@ -2079,21 +2039,6 @@ static int s2255_probe_v4l(struct s2255_dev *dev) return ret; } -static void s2255_exit_v4l(struct s2255_dev *dev) -{ - - int i; - for (i = 0; i < MAX_CHANNELS; i++) { - if (video_is_registered(dev->vdev[i])) { - video_unregister_device(dev->vdev[i]); - printk(KERN_INFO "s2255 unregistered\n"); - } else { - video_device_release(dev->vdev[i]); - printk(KERN_INFO "s2255 released\n"); - } - } -} - /* this function moves the usb stream read pipe data * into the system buffers. * returns 0 on success, EAGAIN if more data to process( call this @@ -2408,9 +2353,7 @@ static int s2255_board_init(struct s2255_dev *dev) dprintk(1, "out of memory!\n"); return -ENOMEM; } - } - /* query the firmware */ fw_ver = s2255_get_fx2fw(dev); @@ -2447,7 +2390,6 @@ static int s2255_board_init(struct s2255_dev *dev) static int s2255_board_shutdown(struct s2255_dev *dev) { u32 i; - dprintk(1, "S2255: board shutdown: %p", dev); for (i = 0; i < MAX_CHANNELS; i++) { @@ -2640,7 +2582,6 @@ static int s2255_stop_acquire(struct s2255_dev *dev, unsigned long chn) static void s2255_stop_readpipe(struct s2255_dev *dev) { int j; - if (dev == NULL) { s2255_dev_err(&dev->udev->dev, "invalid device\n"); return; @@ -2654,7 +2595,6 @@ static void s2255_stop_readpipe(struct s2255_dev *dev) pipe_info->state = 0; } } - for (j = 0; j < MAX_PIPE_BUFFERS; j++) { struct s2255_pipeinfo *pipe_info = &dev->pipes[j]; if (pipe_info->stream_urb) { @@ -2703,24 +2643,22 @@ static int s2255_probe(struct usb_interface *interface, dev = kzalloc(sizeof(struct s2255_dev), GFP_KERNEL); if (dev == NULL) { s2255_dev_err(&interface->dev, "out of memory\n"); - goto error; + return -ENOMEM; } + kref_init(&dev->kref); dev->pid = id->idProduct; dev->fw_data = kzalloc(sizeof(struct s2255_fw), GFP_KERNEL); if (!dev->fw_data) - goto error; - + goto errorFWDATA1; mutex_init(&dev->lock); mutex_init(&dev->open_lock); - /* grab usb_device and save it */ dev->udev = usb_get_dev(interface_to_usbdev(interface)); if (dev->udev == NULL) { dev_err(&interface->dev, "null usb device\n"); retval = -ENODEV; - goto error; + goto errorUDEV; } - kref_init(&dev->kref); dprintk(1, "dev: %p, kref: %p udev %p interface %p\n", dev, &dev->kref, dev->udev, interface); dev->interface = interface; @@ -2737,14 +2675,11 @@ static int s2255_probe(struct usb_interface *interface, if (!dev->read_endpoint) { dev_err(&interface->dev, "Could not find bulk-in endpoint\n"); - goto error; + goto errorEP; } - /* set intfdata */ usb_set_intfdata(interface, dev); - dprintk(100, "after intfdata %p\n", dev); - init_timer(&dev->timer); dev->timer.function = s2255_timer; dev->timer.data = (unsigned long)dev->fw_data; @@ -2756,21 +2691,21 @@ static int s2255_probe(struct usb_interface *interface, } dev->fw_data->fw_urb = usb_alloc_urb(0, GFP_KERNEL); - if (!dev->fw_data->fw_urb) { dev_err(&interface->dev, "out of memory!\n"); - goto error; + goto errorFWURB; } + dev->fw_data->pfw_data = kzalloc(CHUNK_SIZE, GFP_KERNEL); if (!dev->fw_data->pfw_data) { dev_err(&interface->dev, "out of memory!\n"); - goto error; + goto errorFWDATA2; } /* load the first chunk */ if (request_firmware(&dev->fw_data->fw, FIRMWARE_FILE_NAME, &dev->udev->dev)) { printk(KERN_ERR "sensoray 2255 failed to get firmware\n"); - goto error; + goto errorREQFW; } /* check the firmware is valid */ fw_size = dev->fw_data->fw->size; @@ -2779,7 +2714,7 @@ static int s2255_probe(struct usb_interface *interface, if (*pdata != S2255_FW_MARKER) { printk(KERN_INFO "Firmware invalid.\n"); retval = -ENODEV; - goto error; + goto errorFWMARKER; } else { /* make sure firmware is the latest */ __le32 *pRel; @@ -2789,26 +2724,53 @@ static int s2255_probe(struct usb_interface *interface, if (*pRel < S2255_CUR_DSP_FWVER) printk(KERN_INFO "s2255: f2255usb.bin out of date.\n"); if (dev->pid == 0x2257 && *pRel < S2255_MIN_DSP_COLORFILTER) - printk(KERN_WARNING "s2255: 2257 requires firmware 8 or above.\n"); + printk(KERN_WARNING "s2255: 2257 requires firmware %d" + "or above.\n", S2255_MIN_DSP_COLORFILTER); } - /* loads v4l specific */ - s2255_probe_v4l(dev); usb_reset_device(dev->udev); /* load 2255 board specific */ retval = s2255_board_init(dev); if (retval) - goto error; - + goto errorBOARDINIT; dprintk(4, "before probe done %p\n", dev); spin_lock_init(&dev->slock); - s2255_fwload_start(dev, 0); + /* kref for each vdev. Released on video_device_release callback */ + for (i = 0; i < MAX_CHANNELS; i++) + kref_get(&dev->kref); + /* loads v4l specific */ + retval = s2255_probe_v4l(dev); + if (retval) + goto errorV4L; dev_info(&interface->dev, "Sensoray 2255 detected\n"); return 0; -error: +errorV4L: + for (i = 0; i < MAX_CHANNELS; i++) + if (dev->vdev[i] && video_is_registered(dev->vdev[i])) + video_unregister_device(dev->vdev[i]); +errorBOARDINIT: + s2255_board_shutdown(dev); +errorFWMARKER: + release_firmware(dev->fw_data->fw); +errorREQFW: + kfree(dev->fw_data->pfw_data); +errorFWDATA2: + usb_free_urb(dev->fw_data->fw_urb); +errorFWURB: + del_timer(&dev->timer); +errorEP: + usb_put_dev(dev->udev); +errorUDEV: + kfree(dev->fw_data); + mutex_destroy(&dev->open_lock); + mutex_destroy(&dev->lock); +errorFWDATA1: + kfree(dev); + printk(KERN_WARNING "Sensoray 2255 driver load failed: 0x%x\n", retval); return retval; } + /* disconnect routine. when board is removed physically or with rmmod */ static void s2255_disconnect(struct usb_interface *interface) { @@ -2816,11 +2778,11 @@ static void s2255_disconnect(struct usb_interface *interface) int i; dprintk(1, "s2255: disconnect interface %p\n", interface); dev = usb_get_intfdata(interface); - - /* - * wake up any of the timers to allow open_lock to be - * acquired sooner - */ + /* unregister each video device. */ + for (i = 0; i < MAX_CHANNELS; i++) + if (video_is_registered(dev->vdev[i])) + video_unregister_device(dev->vdev[i]); + /* wake up any of our timers */ atomic_set(&dev->fw_data->fw_state, S2255_FW_DISCONNECTING); wake_up(&dev->fw_data->wait_fw); for (i = 0; i < MAX_CHANNELS; i++) { @@ -2829,16 +2791,9 @@ static void s2255_disconnect(struct usb_interface *interface) dev->vidstatus_ready[i] = 1; wake_up(&dev->wait_vidstatus[i]); } - - mutex_lock(&dev->open_lock); usb_set_intfdata(interface, NULL); - mutex_unlock(&dev->open_lock); - - if (dev) { - kref_put(&dev->kref, s2255_destroy); - dprintk(1, "s2255drv: disconnect\n"); - dev_info(&interface->dev, "s2255usb now disconnected\n"); - } + kref_put(&dev->kref, s2255_destroy); + dev_info(&interface->dev, "%s\n", __func__); } static struct usb_driver s2255_driver = { @@ -2851,15 +2806,12 @@ static struct usb_driver s2255_driver = { static int __init usb_s2255_init(void) { int result; - /* register this driver with the USB subsystem */ result = usb_register(&s2255_driver); - if (result) pr_err(KBUILD_MODNAME - ": usb_register failed. Error number %d\n", result); - - dprintk(2, "s2255_init: done\n"); + ": usb_register failed. Error number %d\n", result); + dprintk(2, "%s\n", __func__); return result; } |
