diff options
Diffstat (limited to 'drivers/media/usb/stkwebcam/stk-webcam.c')
| -rw-r--r-- | drivers/media/usb/stkwebcam/stk-webcam.c | 1431 |
1 files changed, 1431 insertions, 0 deletions
diff --git a/drivers/media/usb/stkwebcam/stk-webcam.c b/drivers/media/usb/stkwebcam/stk-webcam.c new file mode 100644 index 000000000..0e231e576 --- /dev/null +++ b/drivers/media/usb/stkwebcam/stk-webcam.c @@ -0,0 +1,1431 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * stk-webcam.c : Driver for Syntek 1125 USB webcam controller + * + * Copyright (C) 2006 Nicolas VIVIEN + * Copyright 2007-2008 Jaime Velasco Juan <jsagarribay@gmail.com> + * + * Some parts are inspired from cafe_ccic.c + * Copyright 2006-2007 Jonathan Corbet + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/slab.h> + +#include <linux/dmi.h> +#include <linux/usb.h> +#include <linux/mm.h> +#include <linux/vmalloc.h> +#include <linux/videodev2.h> +#include <media/v4l2-common.h> +#include <media/v4l2-ioctl.h> +#include <media/v4l2-event.h> + +#include "stk-webcam.h" + + +static int hflip = -1; +module_param(hflip, int, 0444); +MODULE_PARM_DESC(hflip, "Horizontal image flip (mirror). Defaults to 0"); + +static int vflip = -1; +module_param(vflip, int, 0444); +MODULE_PARM_DESC(vflip, "Vertical image flip. Defaults to 0"); + +static int debug; +module_param(debug, int, 0444); +MODULE_PARM_DESC(debug, "Debug v4l ioctls. Defaults to 0"); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Jaime Velasco Juan <jsagarribay@gmail.com> and Nicolas VIVIEN"); +MODULE_DESCRIPTION("Syntek DC1125 webcam driver"); + +/* Some cameras have audio interfaces, we aren't interested in those */ +static const struct usb_device_id stkwebcam_table[] = { + { USB_DEVICE_AND_INTERFACE_INFO(0x174f, 0xa311, 0xff, 0xff, 0xff) }, + { USB_DEVICE_AND_INTERFACE_INFO(0x05e1, 0x0501, 0xff, 0xff, 0xff) }, + { } +}; +MODULE_DEVICE_TABLE(usb, stkwebcam_table); + +/* + * The stk webcam laptop module is mounted upside down in some laptops :( + * + * Some background information (thanks to Hans de Goede for providing this): + * + * 1) Once upon a time the stkwebcam driver was written + * + * 2) The webcam in question was used mostly in Asus laptop models, including + * the laptop of the original author of the driver, and in these models, in + * typical Asus fashion (see the long long list for uvc cams inside v4l-utils), + * they mounted the webcam-module the wrong way up. So the hflip and vflip + * module options were given a default value of 1 (the correct value for + * upside down mounted models) + * + * 3) Years later I got a bug report from a user with a laptop with stkwebcam, + * where the module was actually mounted the right way up, and thus showed + * upside down under Linux. So now I was facing the choice of 2 options: + * + * a) Add a not-upside-down list to stkwebcam, which overrules the default. + * + * b) Do it like all the other drivers do, and make the default right for + * cams mounted the proper way and add an upside-down model list, with + * models where we need to flip-by-default. + * + * Despite knowing that going b) would cause a period of pain where we were + * building the table I opted to go for option b), since a) is just too ugly, + * and worse different from how every other driver does it leading to + * confusion in the long run. This change was made in kernel 3.6. + * + * So for any user report about upside-down images since kernel 3.6 ask them + * to provide the output of 'sudo dmidecode' so the laptop can be added in + * the table below. + */ +static const struct dmi_system_id stk_upside_down_dmi_table[] = { + { + .ident = "ASUS G1", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "G1") + } + }, { + .ident = "ASUS F3JC", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "F3JC") + } + }, + { + .ident = "T12Rg-H", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "HCL Infosystems Limited"), + DMI_MATCH(DMI_PRODUCT_NAME, "T12Rg-H") + } + }, + { + .ident = "ASUS A6VM", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "A6VM") + } + }, + {} +}; + + +/* + * Basic stuff + */ +int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value) +{ + struct usb_device *udev = dev->udev; + int ret; + + ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), + 0x01, + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + value, + index, + NULL, + 0, + 500); + if (ret < 0) + return ret; + else + return 0; +} + +int stk_camera_read_reg(struct stk_camera *dev, u16 index, u8 *value) +{ + struct usb_device *udev = dev->udev; + unsigned char *buf; + int ret; + + buf = kmalloc(sizeof(u8), GFP_KERNEL); + if (!buf) + return -ENOMEM; + + ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), + 0x00, + USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + 0x00, + index, + buf, + sizeof(u8), + 500); + if (ret >= 0) + *value = *buf; + + kfree(buf); + + if (ret < 0) + return ret; + else + return 0; +} + +static int stk_start_stream(struct stk_camera *dev) +{ + u8 value; + int i, ret; + u8 value_116, value_117; + + + if (!is_present(dev)) + return -ENODEV; + if (!is_memallocd(dev) || !is_initialised(dev)) { + pr_err("FIXME: Buffers are not allocated\n"); + return -EFAULT; + } + ret = usb_set_interface(dev->udev, 0, 5); + + if (ret < 0) + pr_err("usb_set_interface failed !\n"); + if (stk_sensor_wakeup(dev)) + pr_err("error awaking the sensor\n"); + + stk_camera_read_reg(dev, 0x0116, &value_116); + stk_camera_read_reg(dev, 0x0117, &value_117); + + stk_camera_write_reg(dev, 0x0116, 0x0000); + stk_camera_write_reg(dev, 0x0117, 0x0000); + + stk_camera_read_reg(dev, 0x0100, &value); + stk_camera_write_reg(dev, 0x0100, value | 0x80); + + stk_camera_write_reg(dev, 0x0116, value_116); + stk_camera_write_reg(dev, 0x0117, value_117); + for (i = 0; i < MAX_ISO_BUFS; i++) { + if (dev->isobufs[i].urb) { + ret = usb_submit_urb(dev->isobufs[i].urb, GFP_KERNEL); + atomic_inc(&dev->urbs_used); + if (ret) + return ret; + } + } + set_streaming(dev); + return 0; +} + +static int stk_stop_stream(struct stk_camera *dev) +{ + u8 value; + int i; + if (is_present(dev)) { + stk_camera_read_reg(dev, 0x0100, &value); + stk_camera_write_reg(dev, 0x0100, value & ~0x80); + if (dev->isobufs != NULL) { + for (i = 0; i < MAX_ISO_BUFS; i++) { + if (dev->isobufs[i].urb) + usb_kill_urb(dev->isobufs[i].urb); + } + } + unset_streaming(dev); + + if (usb_set_interface(dev->udev, 0, 0)) + pr_err("usb_set_interface failed !\n"); + if (stk_sensor_sleep(dev)) + pr_err("error suspending the sensor\n"); + } + return 0; +} + +/* + * This seems to be the shortest init sequence we + * must do in order to find the sensor + * Bit 5 of reg. 0x0000 here is important, when reset to 0 the sensor + * is also reset. Maybe powers down it? + * Rest of values don't make a difference + */ + +static struct regval stk1125_initvals[] = { + /*TODO: What means this sequence? */ + {0x0000, 0x24}, + {0x0100, 0x21}, + {0x0002, 0x68}, + {0x0003, 0x80}, + {0x0005, 0x00}, + {0x0007, 0x03}, + {0x000d, 0x00}, + {0x000f, 0x02}, + {0x0300, 0x12}, + {0x0350, 0x41}, + {0x0351, 0x00}, + {0x0352, 0x00}, + {0x0353, 0x00}, + {0x0018, 0x10}, + {0x0019, 0x00}, + {0x001b, 0x0e}, + {0x001c, 0x46}, + {0x0300, 0x80}, + {0x001a, 0x04}, + {0x0110, 0x00}, + {0x0111, 0x00}, + {0x0112, 0x00}, + {0x0113, 0x00}, + + {0xffff, 0xff}, +}; + + +static int stk_initialise(struct stk_camera *dev) +{ + struct regval *rv; + int ret; + if (!is_present(dev)) + return -ENODEV; + if (is_initialised(dev)) + return 0; + rv = stk1125_initvals; + while (rv->reg != 0xffff) { + ret = stk_camera_write_reg(dev, rv->reg, rv->val); + if (ret) + return ret; + rv++; + } + if (stk_sensor_init(dev) == 0) { + set_initialised(dev); + return 0; + } else + return -1; +} + +/* *********************************************** */ +/* + * This function is called as an URB transfert is complete (Isochronous pipe). + * So, the traitement is done in interrupt time, so it has be fast, not crash, + * and not stall. Neat. + */ +static void stk_isoc_handler(struct urb *urb) +{ + int i; + int ret; + int framelen; + unsigned long flags; + + unsigned char *fill = NULL; + unsigned char *iso_buf = NULL; + + struct stk_camera *dev; + struct stk_sio_buffer *fb; + + dev = (struct stk_camera *) urb->context; + + if (dev == NULL) { + pr_err("isoc_handler called with NULL device !\n"); + return; + } + + if (urb->status == -ENOENT || urb->status == -ECONNRESET + || urb->status == -ESHUTDOWN) { + atomic_dec(&dev->urbs_used); + return; + } + + spin_lock_irqsave(&dev->spinlock, flags); + + if (urb->status != -EINPROGRESS && urb->status != 0) { + pr_err("isoc_handler: urb->status == %d\n", urb->status); + goto resubmit; + } + + if (list_empty(&dev->sio_avail)) { + /*FIXME Stop streaming after a while */ + pr_err_ratelimited("isoc_handler without available buffer!\n"); + goto resubmit; + } + fb = list_first_entry(&dev->sio_avail, + struct stk_sio_buffer, list); + fill = fb->buffer + fb->v4lbuf.bytesused; + + for (i = 0; i < urb->number_of_packets; i++) { + if (urb->iso_frame_desc[i].status != 0) { + if (urb->iso_frame_desc[i].status != -EXDEV) + pr_err("Frame %d has error %d\n", + i, urb->iso_frame_desc[i].status); + continue; + } + framelen = urb->iso_frame_desc[i].actual_length; + iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset; + + if (framelen <= 4) + continue; /* no data */ + + /* + * we found something informational from there + * the isoc frames have to type of headers + * type1: 00 xx 00 00 or 20 xx 00 00 + * type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00 + * xx is a sequencer which has never been seen over 0x3f + * imho data written down looks like bayer, i see similarities + * after every 640 bytes + */ + if (*iso_buf & 0x80) { + framelen -= 8; + iso_buf += 8; + /* This marks a new frame */ + if (fb->v4lbuf.bytesused != 0 + && fb->v4lbuf.bytesused != dev->frame_size) { + pr_err_ratelimited("frame %d, bytesused=%d, skipping\n", + i, fb->v4lbuf.bytesused); + fb->v4lbuf.bytesused = 0; + fill = fb->buffer; + } else if (fb->v4lbuf.bytesused == dev->frame_size) { + if (list_is_singular(&dev->sio_avail)) { + /* Always reuse the last buffer */ + fb->v4lbuf.bytesused = 0; + fill = fb->buffer; + } else { + list_move_tail(dev->sio_avail.next, + &dev->sio_full); + wake_up(&dev->wait_frame); + fb = list_first_entry(&dev->sio_avail, + struct stk_sio_buffer, list); + fb->v4lbuf.bytesused = 0; + fill = fb->buffer; + } + } + } else { + framelen -= 4; + iso_buf += 4; + } + + /* Our buffer is full !!! */ + if (framelen + fb->v4lbuf.bytesused > dev->frame_size) { + pr_err_ratelimited("Frame buffer overflow, lost sync\n"); + /*FIXME Do something here? */ + continue; + } + spin_unlock_irqrestore(&dev->spinlock, flags); + memcpy(fill, iso_buf, framelen); + spin_lock_irqsave(&dev->spinlock, flags); + fill += framelen; + + /* New size of our buffer */ + fb->v4lbuf.bytesused += framelen; + } + +resubmit: + spin_unlock_irqrestore(&dev->spinlock, flags); + urb->dev = dev->udev; + ret = usb_submit_urb(urb, GFP_ATOMIC); + if (ret != 0) { + pr_err("Error (%d) re-submitting urb in stk_isoc_handler\n", + ret); + } +} + +/* -------------------------------------------- */ + +static int stk_prepare_iso(struct stk_camera *dev) +{ + void *kbuf; + int i, j; + struct urb *urb; + struct usb_device *udev; + + if (dev == NULL) + return -ENXIO; + udev = dev->udev; + + if (dev->isobufs) + pr_err("isobufs already allocated. Bad\n"); + else + dev->isobufs = kcalloc(MAX_ISO_BUFS, sizeof(*dev->isobufs), + GFP_KERNEL); + if (dev->isobufs == NULL) { + pr_err("Unable to allocate iso buffers\n"); + return -ENOMEM; + } + for (i = 0; i < MAX_ISO_BUFS; i++) { + if (dev->isobufs[i].data == NULL) { + kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL); + if (kbuf == NULL) { + pr_err("Failed to allocate iso buffer %d\n", i); + goto isobufs_out; + } + dev->isobufs[i].data = kbuf; + } else + pr_err("isobuf data already allocated\n"); + if (dev->isobufs[i].urb == NULL) { + urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL); + if (urb == NULL) + goto isobufs_out; + dev->isobufs[i].urb = urb; + } else { + pr_err("Killing URB\n"); + usb_kill_urb(dev->isobufs[i].urb); + urb = dev->isobufs[i].urb; + } + urb->interval = 1; + urb->dev = udev; + urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep); + urb->transfer_flags = URB_ISO_ASAP; + urb->transfer_buffer = dev->isobufs[i].data; + urb->transfer_buffer_length = ISO_BUFFER_SIZE; + urb->complete = stk_isoc_handler; + urb->context = dev; + urb->start_frame = 0; + urb->number_of_packets = ISO_FRAMES_PER_DESC; + + for (j = 0; j < ISO_FRAMES_PER_DESC; j++) { + urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE; + urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE; + } + } + set_memallocd(dev); + return 0; + +isobufs_out: + for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++) + kfree(dev->isobufs[i].data); + for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++) + usb_free_urb(dev->isobufs[i].urb); + kfree(dev->isobufs); + dev->isobufs = NULL; + return -ENOMEM; +} + +static void stk_clean_iso(struct stk_camera *dev) +{ + int i; + + if (dev == NULL || dev->isobufs == NULL) + return; + + for (i = 0; i < MAX_ISO_BUFS; i++) { + struct urb *urb; + + urb = dev->isobufs[i].urb; + if (urb) { + if (atomic_read(&dev->urbs_used) && is_present(dev)) + usb_kill_urb(urb); + usb_free_urb(urb); + } + kfree(dev->isobufs[i].data); + } + kfree(dev->isobufs); + dev->isobufs = NULL; + unset_memallocd(dev); +} + +static int stk_setup_siobuf(struct stk_camera *dev, int index) +{ + struct stk_sio_buffer *buf = dev->sio_bufs + index; + INIT_LIST_HEAD(&buf->list); + buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size); + buf->buffer = vmalloc_user(buf->v4lbuf.length); + if (buf->buffer == NULL) + return -ENOMEM; + buf->mapcount = 0; + buf->dev = dev; + buf->v4lbuf.index = index; + buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + buf->v4lbuf.flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + buf->v4lbuf.field = V4L2_FIELD_NONE; + buf->v4lbuf.memory = V4L2_MEMORY_MMAP; + buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length; + return 0; +} + +static int stk_free_sio_buffers(struct stk_camera *dev) +{ + int i; + int nbufs; + unsigned long flags; + if (dev->n_sbufs == 0 || dev->sio_bufs == NULL) + return 0; + /* + * If any buffers are mapped, we cannot free them at all. + */ + for (i = 0; i < dev->n_sbufs; i++) { + if (dev->sio_bufs[i].mapcount > 0) + return -EBUSY; + } + /* + * OK, let's do it. + */ + spin_lock_irqsave(&dev->spinlock, flags); + INIT_LIST_HEAD(&dev->sio_avail); + INIT_LIST_HEAD(&dev->sio_full); + nbufs = dev->n_sbufs; + dev->n_sbufs = 0; + spin_unlock_irqrestore(&dev->spinlock, flags); + for (i = 0; i < nbufs; i++) + vfree(dev->sio_bufs[i].buffer); + kfree(dev->sio_bufs); + dev->sio_bufs = NULL; + return 0; +} + +static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs) +{ + int i; + if (dev->sio_bufs != NULL) + pr_err("sio_bufs already allocated\n"); + else { + dev->sio_bufs = kcalloc(n_sbufs, + sizeof(struct stk_sio_buffer), + GFP_KERNEL); + if (dev->sio_bufs == NULL) + return -ENOMEM; + for (i = 0; i < n_sbufs; i++) { + if (stk_setup_siobuf(dev, i)) + return (dev->n_sbufs > 1 ? 0 : -ENOMEM); + dev->n_sbufs = i+1; + } + } + return 0; +} + +static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs) +{ + int err; + err = stk_prepare_iso(dev); + if (err) { + stk_clean_iso(dev); + return err; + } + err = stk_prepare_sio_buffers(dev, n_sbufs); + if (err) { + stk_free_sio_buffers(dev); + return err; + } + return 0; +} + +static void stk_free_buffers(struct stk_camera *dev) +{ + stk_clean_iso(dev); + stk_free_sio_buffers(dev); +} +/* -------------------------------------------- */ + +/* v4l file operations */ + +static int v4l_stk_open(struct file *fp) +{ + struct stk_camera *dev = video_drvdata(fp); + int err; + + if (dev == NULL || !is_present(dev)) + return -ENXIO; + + if (mutex_lock_interruptible(&dev->lock)) + return -ERESTARTSYS; + if (!dev->first_init) + stk_camera_write_reg(dev, 0x0, 0x24); + else + dev->first_init = 0; + + err = v4l2_fh_open(fp); + if (!err) + usb_autopm_get_interface(dev->interface); + mutex_unlock(&dev->lock); + return err; +} + +static int v4l_stk_release(struct file *fp) +{ + struct stk_camera *dev = video_drvdata(fp); + + mutex_lock(&dev->lock); + if (dev->owner == fp) { + stk_stop_stream(dev); + stk_free_buffers(dev); + stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */ + unset_initialised(dev); + dev->owner = NULL; + } + + usb_autopm_put_interface(dev->interface); + mutex_unlock(&dev->lock); + return v4l2_fh_release(fp); +} + +static ssize_t stk_read(struct file *fp, char __user *buf, + size_t count, loff_t *f_pos) +{ + int i; + int ret; + unsigned long flags; + struct stk_sio_buffer *sbuf; + struct stk_camera *dev = video_drvdata(fp); + + if (!is_present(dev)) + return -EIO; + if (dev->owner && (!dev->reading || dev->owner != fp)) + return -EBUSY; + dev->owner = fp; + if (!is_streaming(dev)) { + if (stk_initialise(dev) + || stk_allocate_buffers(dev, 3) + || stk_start_stream(dev)) + return -ENOMEM; + dev->reading = 1; + spin_lock_irqsave(&dev->spinlock, flags); + for (i = 0; i < dev->n_sbufs; i++) { + list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail); + dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED; + } + spin_unlock_irqrestore(&dev->spinlock, flags); + } + if (*f_pos == 0) { + if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full)) + return -EWOULDBLOCK; + ret = wait_event_interruptible(dev->wait_frame, + !list_empty(&dev->sio_full) || !is_present(dev)); + if (ret) + return ret; + if (!is_present(dev)) + return -EIO; + } + if (count + *f_pos > dev->frame_size) + count = dev->frame_size - *f_pos; + spin_lock_irqsave(&dev->spinlock, flags); + if (list_empty(&dev->sio_full)) { + spin_unlock_irqrestore(&dev->spinlock, flags); + pr_err("BUG: No siobufs ready\n"); + return 0; + } + sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list); + spin_unlock_irqrestore(&dev->spinlock, flags); + + if (copy_to_user(buf, sbuf->buffer + *f_pos, count)) + return -EFAULT; + + *f_pos += count; + + if (*f_pos >= dev->frame_size) { + *f_pos = 0; + spin_lock_irqsave(&dev->spinlock, flags); + list_move_tail(&sbuf->list, &dev->sio_avail); + spin_unlock_irqrestore(&dev->spinlock, flags); + } + return count; +} + +static ssize_t v4l_stk_read(struct file *fp, char __user *buf, + size_t count, loff_t *f_pos) +{ + struct stk_camera *dev = video_drvdata(fp); + int ret; + + if (mutex_lock_interruptible(&dev->lock)) + return -ERESTARTSYS; + ret = stk_read(fp, buf, count, f_pos); + mutex_unlock(&dev->lock); + return ret; +} + +static __poll_t v4l_stk_poll(struct file *fp, poll_table *wait) +{ + struct stk_camera *dev = video_drvdata(fp); + __poll_t res = v4l2_ctrl_poll(fp, wait); + + poll_wait(fp, &dev->wait_frame, wait); + + if (!is_present(dev)) + return EPOLLERR; + + if (!list_empty(&dev->sio_full)) + return res | EPOLLIN | EPOLLRDNORM; + + return res; +} + + +static void stk_v4l_vm_open(struct vm_area_struct *vma) +{ + struct stk_sio_buffer *sbuf = vma->vm_private_data; + sbuf->mapcount++; +} +static void stk_v4l_vm_close(struct vm_area_struct *vma) +{ + struct stk_sio_buffer *sbuf = vma->vm_private_data; + sbuf->mapcount--; + if (sbuf->mapcount == 0) + sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED; +} +static const struct vm_operations_struct stk_v4l_vm_ops = { + .open = stk_v4l_vm_open, + .close = stk_v4l_vm_close +}; + +static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma) +{ + unsigned int i; + int ret; + unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; + struct stk_camera *dev = video_drvdata(fp); + struct stk_sio_buffer *sbuf = NULL; + + if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED)) + return -EINVAL; + + for (i = 0; i < dev->n_sbufs; i++) { + if (dev->sio_bufs[i].v4lbuf.m.offset == offset) { + sbuf = dev->sio_bufs + i; + break; + } + } + if (sbuf == NULL) + return -EINVAL; + ret = remap_vmalloc_range(vma, sbuf->buffer, 0); + if (ret) + return ret; + vma->vm_flags |= VM_DONTEXPAND; + vma->vm_private_data = sbuf; + vma->vm_ops = &stk_v4l_vm_ops; + sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED; + stk_v4l_vm_open(vma); + return 0; +} + +/* v4l ioctl handlers */ + +static int stk_vidioc_querycap(struct file *filp, + void *priv, struct v4l2_capability *cap) +{ + struct stk_camera *dev = video_drvdata(filp); + + strscpy(cap->driver, "stk", sizeof(cap->driver)); + strscpy(cap->card, "stk", sizeof(cap->card)); + usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info)); + return 0; +} + +static int stk_vidioc_enum_input(struct file *filp, + void *priv, struct v4l2_input *input) +{ + if (input->index != 0) + return -EINVAL; + + strscpy(input->name, "Syntek USB Camera", sizeof(input->name)); + input->type = V4L2_INPUT_TYPE_CAMERA; + return 0; +} + + +static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i) +{ + *i = 0; + return 0; +} + +static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i) +{ + return i ? -EINVAL : 0; +} + +static int stk_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct stk_camera *dev = + container_of(ctrl->handler, struct stk_camera, hdl); + + switch (ctrl->id) { + case V4L2_CID_BRIGHTNESS: + return stk_sensor_set_brightness(dev, ctrl->val); + case V4L2_CID_HFLIP: + if (dmi_check_system(stk_upside_down_dmi_table)) + dev->vsettings.hflip = !ctrl->val; + else + dev->vsettings.hflip = ctrl->val; + return 0; + case V4L2_CID_VFLIP: + if (dmi_check_system(stk_upside_down_dmi_table)) + dev->vsettings.vflip = !ctrl->val; + else + dev->vsettings.vflip = ctrl->val; + return 0; + default: + return -EINVAL; + } + return 0; +} + + +static int stk_vidioc_enum_fmt_vid_cap(struct file *filp, + void *priv, struct v4l2_fmtdesc *fmtd) +{ + switch (fmtd->index) { + case 0: + fmtd->pixelformat = V4L2_PIX_FMT_RGB565; + break; + case 1: + fmtd->pixelformat = V4L2_PIX_FMT_RGB565X; + break; + case 2: + fmtd->pixelformat = V4L2_PIX_FMT_UYVY; + break; + case 3: + fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8; + break; + case 4: + fmtd->pixelformat = V4L2_PIX_FMT_YUYV; + break; + default: + return -EINVAL; + } + return 0; +} + +static struct stk_size { + unsigned w; + unsigned h; + enum stk_mode m; +} stk_sizes[] = { + { .w = 1280, .h = 1024, .m = MODE_SXGA, }, + { .w = 640, .h = 480, .m = MODE_VGA, }, + { .w = 352, .h = 288, .m = MODE_CIF, }, + { .w = 320, .h = 240, .m = MODE_QVGA, }, + { .w = 176, .h = 144, .m = MODE_QCIF, }, +}; + +static int stk_vidioc_g_fmt_vid_cap(struct file *filp, + void *priv, struct v4l2_format *f) +{ + struct v4l2_pix_format *pix_format = &f->fmt.pix; + struct stk_camera *dev = video_drvdata(filp); + int i; + + for (i = 0; i < ARRAY_SIZE(stk_sizes) && + stk_sizes[i].m != dev->vsettings.mode; i++) + ; + if (i == ARRAY_SIZE(stk_sizes)) { + pr_err("ERROR: mode invalid\n"); + return -EINVAL; + } + pix_format->width = stk_sizes[i].w; + pix_format->height = stk_sizes[i].h; + pix_format->field = V4L2_FIELD_NONE; + pix_format->colorspace = V4L2_COLORSPACE_SRGB; + pix_format->pixelformat = dev->vsettings.palette; + if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8) + pix_format->bytesperline = pix_format->width; + else + pix_format->bytesperline = 2 * pix_format->width; + pix_format->sizeimage = pix_format->bytesperline + * pix_format->height; + return 0; +} + +static int stk_try_fmt_vid_cap(struct file *filp, + struct v4l2_format *fmtd, int *idx) +{ + int i; + switch (fmtd->fmt.pix.pixelformat) { + case V4L2_PIX_FMT_RGB565: + case V4L2_PIX_FMT_RGB565X: + case V4L2_PIX_FMT_UYVY: + case V4L2_PIX_FMT_YUYV: + case V4L2_PIX_FMT_SBGGR8: + break; + default: + return -EINVAL; + } + for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) { + if (fmtd->fmt.pix.width > stk_sizes[i].w) + break; + } + if (i == ARRAY_SIZE(stk_sizes) + || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w) + < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) { + fmtd->fmt.pix.height = stk_sizes[i-1].h; + fmtd->fmt.pix.width = stk_sizes[i-1].w; + if (idx) + *idx = i - 1; + } else { + fmtd->fmt.pix.height = stk_sizes[i].h; + fmtd->fmt.pix.width = stk_sizes[i].w; + if (idx) + *idx = i; + } + + fmtd->fmt.pix.field = V4L2_FIELD_NONE; + fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB; + if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8) + fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width; + else + fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width; + fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline + * fmtd->fmt.pix.height; + return 0; +} + +static int stk_vidioc_try_fmt_vid_cap(struct file *filp, + void *priv, struct v4l2_format *fmtd) +{ + return stk_try_fmt_vid_cap(filp, fmtd, NULL); +} + +static int stk_setup_format(struct stk_camera *dev) +{ + int i = 0; + int depth; + if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8) + depth = 1; + else + depth = 2; + while (i < ARRAY_SIZE(stk_sizes) && + stk_sizes[i].m != dev->vsettings.mode) + i++; + if (i == ARRAY_SIZE(stk_sizes)) { + pr_err("Something is broken in %s\n", __func__); + return -EFAULT; + } + /* This registers controls some timings, not sure of what. */ + stk_camera_write_reg(dev, 0x001b, 0x0e); + if (dev->vsettings.mode == MODE_SXGA) + stk_camera_write_reg(dev, 0x001c, 0x0e); + else + stk_camera_write_reg(dev, 0x001c, 0x46); + /* + * Registers 0x0115 0x0114 are the size of each line (bytes), + * regs 0x0117 0x0116 are the height of the image. + */ + stk_camera_write_reg(dev, 0x0115, + ((stk_sizes[i].w * depth) >> 8) & 0xff); + stk_camera_write_reg(dev, 0x0114, + (stk_sizes[i].w * depth) & 0xff); + stk_camera_write_reg(dev, 0x0117, + (stk_sizes[i].h >> 8) & 0xff); + stk_camera_write_reg(dev, 0x0116, + stk_sizes[i].h & 0xff); + return stk_sensor_configure(dev); +} + +static int stk_vidioc_s_fmt_vid_cap(struct file *filp, + void *priv, struct v4l2_format *fmtd) +{ + int ret; + int idx; + struct stk_camera *dev = video_drvdata(filp); + + if (dev == NULL) + return -ENODEV; + if (!is_present(dev)) + return -ENODEV; + if (is_streaming(dev)) + return -EBUSY; + if (dev->owner) + return -EBUSY; + ret = stk_try_fmt_vid_cap(filp, fmtd, &idx); + if (ret) + return ret; + + dev->vsettings.palette = fmtd->fmt.pix.pixelformat; + stk_free_buffers(dev); + dev->frame_size = fmtd->fmt.pix.sizeimage; + dev->vsettings.mode = stk_sizes[idx].m; + + stk_initialise(dev); + return stk_setup_format(dev); +} + +static int stk_vidioc_reqbufs(struct file *filp, + void *priv, struct v4l2_requestbuffers *rb) +{ + struct stk_camera *dev = video_drvdata(filp); + + if (dev == NULL) + return -ENODEV; + if (rb->memory != V4L2_MEMORY_MMAP) + return -EINVAL; + if (is_streaming(dev) + || (dev->owner && dev->owner != filp)) + return -EBUSY; + stk_free_buffers(dev); + if (rb->count == 0) { + stk_camera_write_reg(dev, 0x0, 0x49); /* turn off the LED */ + unset_initialised(dev); + dev->owner = NULL; + return 0; + } + dev->owner = filp; + + /*FIXME If they ask for zero, we must stop streaming and free */ + if (rb->count < 3) + rb->count = 3; + /* Arbitrary limit */ + else if (rb->count > 5) + rb->count = 5; + + stk_allocate_buffers(dev, rb->count); + rb->count = dev->n_sbufs; + return 0; +} + +static int stk_vidioc_querybuf(struct file *filp, + void *priv, struct v4l2_buffer *buf) +{ + struct stk_camera *dev = video_drvdata(filp); + struct stk_sio_buffer *sbuf; + + if (buf->index >= dev->n_sbufs) + return -EINVAL; + sbuf = dev->sio_bufs + buf->index; + *buf = sbuf->v4lbuf; + return 0; +} + +static int stk_vidioc_qbuf(struct file *filp, + void *priv, struct v4l2_buffer *buf) +{ + struct stk_camera *dev = video_drvdata(filp); + struct stk_sio_buffer *sbuf; + unsigned long flags; + + if (buf->memory != V4L2_MEMORY_MMAP) + return -EINVAL; + + if (buf->index >= dev->n_sbufs) + return -EINVAL; + sbuf = dev->sio_bufs + buf->index; + if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED) + return 0; + sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED; + sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE; + spin_lock_irqsave(&dev->spinlock, flags); + list_add_tail(&sbuf->list, &dev->sio_avail); + *buf = sbuf->v4lbuf; + spin_unlock_irqrestore(&dev->spinlock, flags); + return 0; +} + +static int stk_vidioc_dqbuf(struct file *filp, + void *priv, struct v4l2_buffer *buf) +{ + struct stk_camera *dev = video_drvdata(filp); + struct stk_sio_buffer *sbuf; + unsigned long flags; + int ret; + + if (!is_streaming(dev)) + return -EINVAL; + + if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full)) + return -EWOULDBLOCK; + ret = wait_event_interruptible(dev->wait_frame, + !list_empty(&dev->sio_full) || !is_present(dev)); + if (ret) + return ret; + if (!is_present(dev)) + return -EIO; + + spin_lock_irqsave(&dev->spinlock, flags); + sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list); + list_del_init(&sbuf->list); + spin_unlock_irqrestore(&dev->spinlock, flags); + sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED; + sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE; + sbuf->v4lbuf.sequence = ++dev->sequence; + v4l2_buffer_set_timestamp(&sbuf->v4lbuf, ktime_get_ns()); + + *buf = sbuf->v4lbuf; + return 0; +} + +static int stk_vidioc_streamon(struct file *filp, + void *priv, enum v4l2_buf_type type) +{ + struct stk_camera *dev = video_drvdata(filp); + if (is_streaming(dev)) + return 0; + if (dev->sio_bufs == NULL) + return -EINVAL; + dev->sequence = 0; + return stk_start_stream(dev); +} + +static int stk_vidioc_streamoff(struct file *filp, + void *priv, enum v4l2_buf_type type) +{ + struct stk_camera *dev = video_drvdata(filp); + unsigned long flags; + int i; + stk_stop_stream(dev); + spin_lock_irqsave(&dev->spinlock, flags); + INIT_LIST_HEAD(&dev->sio_avail); + INIT_LIST_HEAD(&dev->sio_full); + for (i = 0; i < dev->n_sbufs; i++) { + INIT_LIST_HEAD(&dev->sio_bufs[i].list); + dev->sio_bufs[i].v4lbuf.flags = 0; + } + spin_unlock_irqrestore(&dev->spinlock, flags); + return 0; +} + + +static int stk_vidioc_g_parm(struct file *filp, + void *priv, struct v4l2_streamparm *sp) +{ + /*FIXME This is not correct */ + sp->parm.capture.timeperframe.numerator = 1; + sp->parm.capture.timeperframe.denominator = 30; + sp->parm.capture.readbuffers = 2; + return 0; +} + +static int stk_vidioc_enum_framesizes(struct file *filp, + void *priv, struct v4l2_frmsizeenum *frms) +{ + if (frms->index >= ARRAY_SIZE(stk_sizes)) + return -EINVAL; + switch (frms->pixel_format) { + case V4L2_PIX_FMT_RGB565: + case V4L2_PIX_FMT_RGB565X: + case V4L2_PIX_FMT_UYVY: + case V4L2_PIX_FMT_YUYV: + case V4L2_PIX_FMT_SBGGR8: + frms->type = V4L2_FRMSIZE_TYPE_DISCRETE; + frms->discrete.width = stk_sizes[frms->index].w; + frms->discrete.height = stk_sizes[frms->index].h; + return 0; + default: return -EINVAL; + } +} + +static const struct v4l2_ctrl_ops stk_ctrl_ops = { + .s_ctrl = stk_s_ctrl, +}; + +static const struct v4l2_file_operations v4l_stk_fops = { + .owner = THIS_MODULE, + .open = v4l_stk_open, + .release = v4l_stk_release, + .read = v4l_stk_read, + .poll = v4l_stk_poll, + .mmap = v4l_stk_mmap, + .unlocked_ioctl = video_ioctl2, +}; + +static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = { + .vidioc_querycap = stk_vidioc_querycap, + .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap, + .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap, + .vidioc_enum_input = stk_vidioc_enum_input, + .vidioc_s_input = stk_vidioc_s_input, + .vidioc_g_input = stk_vidioc_g_input, + .vidioc_reqbufs = stk_vidioc_reqbufs, + .vidioc_querybuf = stk_vidioc_querybuf, + .vidioc_qbuf = stk_vidioc_qbuf, + .vidioc_dqbuf = stk_vidioc_dqbuf, + .vidioc_streamon = stk_vidioc_streamon, + .vidioc_streamoff = stk_vidioc_streamoff, + .vidioc_g_parm = stk_vidioc_g_parm, + .vidioc_enum_framesizes = stk_vidioc_enum_framesizes, + .vidioc_log_status = v4l2_ctrl_log_status, + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, +}; + +static void stk_v4l_dev_release(struct video_device *vd) +{ + struct stk_camera *dev = vdev_to_camera(vd); + + if (dev->sio_bufs != NULL || dev->isobufs != NULL) + pr_err("We are leaking memory\n"); + usb_put_intf(dev->interface); +} + +static const struct video_device stk_v4l_data = { + .name = "stkwebcam", + .fops = &v4l_stk_fops, + .ioctl_ops = &v4l_stk_ioctl_ops, + .release = stk_v4l_dev_release, +}; + + +static int stk_register_video_device(struct stk_camera *dev) +{ + int err; + + dev->vdev = stk_v4l_data; + dev->vdev.lock = &dev->lock; + dev->vdev.v4l2_dev = &dev->v4l2_dev; + dev->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | + V4L2_CAP_STREAMING; + video_set_drvdata(&dev->vdev, dev); + err = video_register_device(&dev->vdev, VFL_TYPE_VIDEO, -1); + if (err) + pr_err("v4l registration failed\n"); + else + pr_info("Syntek USB2.0 Camera is now controlling device %s\n", + video_device_node_name(&dev->vdev)); + return err; +} + + +/* USB Stuff */ + +static int stk_camera_probe(struct usb_interface *interface, + const struct usb_device_id *id) +{ + struct v4l2_ctrl_handler *hdl; + int err = 0; + int i; + + struct stk_camera *dev = NULL; + struct usb_device *udev = interface_to_usbdev(interface); + struct usb_host_interface *iface_desc; + struct usb_endpoint_descriptor *endpoint; + + dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL); + if (dev == NULL) { + pr_err("Out of memory !\n"); + return -ENOMEM; + } + err = v4l2_device_register(&interface->dev, &dev->v4l2_dev); + if (err < 0) { + dev_err(&udev->dev, "couldn't register v4l2_device\n"); + kfree(dev); + return err; + } + hdl = &dev->hdl; + v4l2_ctrl_handler_init(hdl, 3); + v4l2_ctrl_new_std(hdl, &stk_ctrl_ops, + V4L2_CID_BRIGHTNESS, 0, 0xff, 0x1, 0x60); + v4l2_ctrl_new_std(hdl, &stk_ctrl_ops, + V4L2_CID_HFLIP, 0, 1, 1, 1); + v4l2_ctrl_new_std(hdl, &stk_ctrl_ops, + V4L2_CID_VFLIP, 0, 1, 1, 1); + if (hdl->error) { + err = hdl->error; + dev_err(&udev->dev, "couldn't register control\n"); + goto error; + } + dev->v4l2_dev.ctrl_handler = hdl; + + spin_lock_init(&dev->spinlock); + mutex_init(&dev->lock); + init_waitqueue_head(&dev->wait_frame); + dev->first_init = 1; /* webcam LED management */ + + dev->udev = udev; + dev->interface = interface; + usb_get_intf(interface); + + if (hflip != -1) + dev->vsettings.hflip = hflip; + else if (dmi_check_system(stk_upside_down_dmi_table)) + dev->vsettings.hflip = 1; + else + dev->vsettings.hflip = 0; + if (vflip != -1) + dev->vsettings.vflip = vflip; + else if (dmi_check_system(stk_upside_down_dmi_table)) + dev->vsettings.vflip = 1; + else + dev->vsettings.vflip = 0; + dev->n_sbufs = 0; + set_present(dev); + + /* Set up the endpoint information + * use only the first isoc-in endpoint + * for the current alternate setting */ + iface_desc = interface->cur_altsetting; + + for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { + endpoint = &iface_desc->endpoint[i].desc; + + if (!dev->isoc_ep + && usb_endpoint_is_isoc_in(endpoint)) { + /* we found an isoc in endpoint */ + dev->isoc_ep = usb_endpoint_num(endpoint); + break; + } + } + if (!dev->isoc_ep) { + pr_err("Could not find isoc-in endpoint\n"); + err = -ENODEV; + goto error_put; + } + dev->vsettings.palette = V4L2_PIX_FMT_RGB565; + dev->vsettings.mode = MODE_VGA; + dev->frame_size = 640 * 480 * 2; + + INIT_LIST_HEAD(&dev->sio_avail); + INIT_LIST_HEAD(&dev->sio_full); + + usb_set_intfdata(interface, dev); + + err = stk_register_video_device(dev); + if (err) + goto error_put; + + return 0; + +error_put: + usb_put_intf(interface); +error: + v4l2_ctrl_handler_free(hdl); + v4l2_device_unregister(&dev->v4l2_dev); + kfree(dev); + return err; +} + +static void stk_camera_disconnect(struct usb_interface *interface) +{ + struct stk_camera *dev = usb_get_intfdata(interface); + + usb_set_intfdata(interface, NULL); + unset_present(dev); + + wake_up_interruptible(&dev->wait_frame); + + pr_info("Syntek USB2.0 Camera release resources device %s\n", + video_device_node_name(&dev->vdev)); + + video_unregister_device(&dev->vdev); + v4l2_ctrl_handler_free(&dev->hdl); + v4l2_device_unregister(&dev->v4l2_dev); + kfree(dev); +} + +#ifdef CONFIG_PM +static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message) +{ + struct stk_camera *dev = usb_get_intfdata(intf); + if (is_streaming(dev)) { + stk_stop_stream(dev); + /* yes, this is ugly */ + set_streaming(dev); + } + return 0; +} + +static int stk_camera_resume(struct usb_interface *intf) +{ + struct stk_camera *dev = usb_get_intfdata(intf); + if (!is_initialised(dev)) + return 0; + unset_initialised(dev); + stk_initialise(dev); + stk_camera_write_reg(dev, 0x0, 0x49); + stk_setup_format(dev); + if (is_streaming(dev)) + stk_start_stream(dev); + return 0; +} +#endif + +static struct usb_driver stk_camera_driver = { + .name = "stkwebcam", + .probe = stk_camera_probe, + .disconnect = stk_camera_disconnect, + .id_table = stkwebcam_table, +#ifdef CONFIG_PM + .suspend = stk_camera_suspend, + .resume = stk_camera_resume, +#endif +}; + +module_usb_driver(stk_camera_driver); |