diff options
Diffstat (limited to 'drivers/media/video/cafe_ccic.c')
| -rw-r--r-- | drivers/media/video/cafe_ccic.c | 180 |
1 files changed, 147 insertions, 33 deletions
diff --git a/drivers/media/video/cafe_ccic.c b/drivers/media/video/cafe_ccic.c index 9536f1a40dd2..2934770dacc3 100644 --- a/drivers/media/video/cafe_ccic.c +++ b/drivers/media/video/cafe_ccic.c @@ -25,6 +25,7 @@ #include <linux/module.h> #include <linux/init.h> #include <linux/fs.h> +#include <linux/dmi.h> #include <linux/mm.h> #include <linux/pci.h> #include <linux/i2c.h> @@ -46,6 +47,7 @@ #include <asm/uaccess.h> #include <asm/io.h> +#include "ov7670.h" #include "cafe_ccic-regs.h" #define CAFE_VERSION 0x000002 @@ -180,6 +182,7 @@ struct cafe_camera /* Current operating parameters */ u32 sensor_type; /* Currently ov7670 only */ struct v4l2_pix_format pix_format; + enum v4l2_mbus_pixelcode mbus_code; /* Locks */ struct mutex s_mutex; /* Access to this structure */ @@ -207,6 +210,49 @@ static inline struct cafe_camera *to_cam(struct v4l2_device *dev) return container_of(dev, struct cafe_camera, v4l2_dev); } +static struct cafe_format_struct { + __u8 *desc; + __u32 pixelformat; + int bpp; /* Bytes per pixel */ + enum v4l2_mbus_pixelcode mbus_code; +} cafe_formats[] = { + { + .desc = "YUYV 4:2:2", + .pixelformat = V4L2_PIX_FMT_YUYV, + .mbus_code = V4L2_MBUS_FMT_YUYV8_2X8, + .bpp = 2, + }, + { + .desc = "RGB 444", + .pixelformat = V4L2_PIX_FMT_RGB444, + .mbus_code = V4L2_MBUS_FMT_RGB444_2X8_PADHI_LE, + .bpp = 2, + }, + { + .desc = "RGB 565", + .pixelformat = V4L2_PIX_FMT_RGB565, + .mbus_code = V4L2_MBUS_FMT_RGB565_2X8_LE, + .bpp = 2, + }, + { + .desc = "Raw RGB Bayer", + .pixelformat = V4L2_PIX_FMT_SBGGR8, + .mbus_code = V4L2_MBUS_FMT_SBGGR8_1X8, + .bpp = 1 + }, +}; +#define N_CAFE_FMTS ARRAY_SIZE(cafe_formats) + +static struct cafe_format_struct *cafe_find_format(u32 pixelformat) +{ + unsigned i; + + for (i = 0; i < N_CAFE_FMTS; i++) + if (cafe_formats[i].pixelformat == pixelformat) + return cafe_formats + i; + /* Not found? Then return the first format. */ + return cafe_formats; +} /* * Start over with DMA buffers - dev_lock needed. @@ -319,7 +365,6 @@ static int cafe_smbus_write_data(struct cafe_camera *cam, { unsigned int rval; unsigned long flags; - DEFINE_WAIT(the_wait); spin_lock_irqsave(&cam->dev_lock, flags); rval = TWSIC0_EN | ((addr << TWSIC0_SID_SHIFT) & TWSIC0_SID); @@ -334,28 +379,27 @@ static int cafe_smbus_write_data(struct cafe_camera *cam, cafe_reg_write(cam, REG_TWSIC1, rval); spin_unlock_irqrestore(&cam->dev_lock, flags); + /* Unfortunately, reading TWSIC1 too soon after sending a command + * causes the device to die. + * Use a busy-wait because we often send a large quantity of small + * commands at-once; using msleep() would cause a lot of context + * switches which take longer than 2ms, resulting in a noticable + * boot-time and capture-start delays. + */ + mdelay(2); + /* - * Time to wait for the write to complete. THIS IS A RACY - * WAY TO DO IT, but the sad fact is that reading the TWSIC1 - * register too quickly after starting the operation sends - * the device into a place that may be kinder and better, but - * which is absolutely useless for controlling the sensor. In - * practice we have plenty of time to get into our sleep state - * before the interrupt hits, and the worst case is that we - * time out and then see that things completed, so this seems - * the best way for now. + * Another sad fact is that sometimes, commands silently complete but + * cafe_smbus_write_done() never becomes aware of this. + * This happens at random and appears to possible occur with any + * command. + * We don't understand why this is. We work around this issue + * with the timeout in the wait below, assuming that all commands + * complete within the timeout. */ - do { - prepare_to_wait(&cam->smbus_wait, &the_wait, - TASK_UNINTERRUPTIBLE); - schedule_timeout(1); /* even 1 jiffy is too long */ - finish_wait(&cam->smbus_wait, &the_wait); - } while (!cafe_smbus_write_done(cam)); - -#ifdef IF_THE_CAFE_HARDWARE_WORKED_RIGHT wait_event_timeout(cam->smbus_wait, cafe_smbus_write_done(cam), CAFE_SMBUS_TIMEOUT); -#endif + spin_lock_irqsave(&cam->dev_lock, flags); rval = cafe_reg_read(cam, REG_TWSIC1); spin_unlock_irqrestore(&cam->dev_lock, flags); @@ -812,15 +856,15 @@ static int cafe_cam_set_flip(struct cafe_camera *cam) static int cafe_cam_configure(struct cafe_camera *cam) { - struct v4l2_format fmt; + struct v4l2_mbus_framefmt mbus_fmt; int ret; if (cam->state != S_IDLE) return -EINVAL; - fmt.fmt.pix = cam->pix_format; + v4l2_fill_mbus_format(&mbus_fmt, &cam->pix_format, cam->mbus_code); ret = sensor_call(cam, core, init, 0); if (ret == 0) - ret = sensor_call(cam, video, s_fmt, &fmt); + ret = sensor_call(cam, video, s_mbus_fmt, &mbus_fmt); /* * OV7670 does weird things if flip is set *before* format... */ @@ -1481,7 +1525,7 @@ static int cafe_vidioc_querycap(struct file *file, void *priv, /* * The default format we use until somebody says otherwise. */ -static struct v4l2_pix_format cafe_def_pix_format = { +static const struct v4l2_pix_format cafe_def_pix_format = { .width = VGA_WIDTH, .height = VGA_HEIGHT, .pixelformat = V4L2_PIX_FMT_YUYV, @@ -1490,28 +1534,38 @@ static struct v4l2_pix_format cafe_def_pix_format = { .sizeimage = VGA_WIDTH*VGA_HEIGHT*2, }; +static const enum v4l2_mbus_pixelcode cafe_def_mbus_code = + V4L2_MBUS_FMT_YUYV8_2X8; + static int cafe_vidioc_enum_fmt_vid_cap(struct file *filp, void *priv, struct v4l2_fmtdesc *fmt) { - struct cafe_camera *cam = priv; - int ret; - - mutex_lock(&cam->s_mutex); - ret = sensor_call(cam, video, enum_fmt, fmt); - mutex_unlock(&cam->s_mutex); - return ret; + if (fmt->index >= N_CAFE_FMTS) + return -EINVAL; + strlcpy(fmt->description, cafe_formats[fmt->index].desc, + sizeof(fmt->description)); + fmt->pixelformat = cafe_formats[fmt->index].pixelformat; + return 0; } - static int cafe_vidioc_try_fmt_vid_cap(struct file *filp, void *priv, struct v4l2_format *fmt) { struct cafe_camera *cam = priv; + struct cafe_format_struct *f; + struct v4l2_pix_format *pix = &fmt->fmt.pix; + struct v4l2_mbus_framefmt mbus_fmt; int ret; + f = cafe_find_format(pix->pixelformat); + pix->pixelformat = f->pixelformat; + v4l2_fill_mbus_format(&mbus_fmt, pix, f->mbus_code); mutex_lock(&cam->s_mutex); - ret = sensor_call(cam, video, try_fmt, fmt); + ret = sensor_call(cam, video, try_mbus_fmt, &mbus_fmt); mutex_unlock(&cam->s_mutex); + v4l2_fill_pix_format(pix, &mbus_fmt); + pix->bytesperline = pix->width * f->bpp; + pix->sizeimage = pix->height * pix->bytesperline; return ret; } @@ -1519,6 +1573,7 @@ static int cafe_vidioc_s_fmt_vid_cap(struct file *filp, void *priv, struct v4l2_format *fmt) { struct cafe_camera *cam = priv; + struct cafe_format_struct *f; int ret; /* @@ -1527,6 +1582,9 @@ static int cafe_vidioc_s_fmt_vid_cap(struct file *filp, void *priv, */ if (cam->state != S_IDLE || cam->n_sbufs > 0) return -EBUSY; + + f = cafe_find_format(fmt->fmt.pix.pixelformat); + /* * See if the formatting works in principle. */ @@ -1539,6 +1597,8 @@ static int cafe_vidioc_s_fmt_vid_cap(struct file *filp, void *priv, */ mutex_lock(&cam->s_mutex); cam->pix_format = fmt->fmt.pix; + cam->mbus_code = f->mbus_code; + /* * Make sure we have appropriate DMA buffers. */ @@ -1652,6 +1712,30 @@ static int cafe_vidioc_g_chip_ident(struct file *file, void *priv, return sensor_call(cam, core, g_chip_ident, chip); } +static int cafe_vidioc_enum_framesizes(struct file *filp, void *priv, + struct v4l2_frmsizeenum *sizes) +{ + struct cafe_camera *cam = priv; + int ret; + + mutex_lock(&cam->s_mutex); + ret = sensor_call(cam, video, enum_framesizes, sizes); + mutex_unlock(&cam->s_mutex); + return ret; +} + +static int cafe_vidioc_enum_frameintervals(struct file *filp, void *priv, + struct v4l2_frmivalenum *interval) +{ + struct cafe_camera *cam = priv; + int ret; + + mutex_lock(&cam->s_mutex); + ret = sensor_call(cam, video, enum_frameintervals, interval); + mutex_unlock(&cam->s_mutex); + return ret; +} + #ifdef CONFIG_VIDEO_ADV_DEBUG static int cafe_vidioc_g_register(struct file *file, void *priv, struct v4l2_dbg_register *reg) @@ -1715,6 +1799,8 @@ static const struct v4l2_ioctl_ops cafe_v4l_ioctl_ops = { .vidioc_s_ctrl = cafe_vidioc_s_ctrl, .vidioc_g_parm = cafe_vidioc_g_parm, .vidioc_s_parm = cafe_vidioc_s_parm, + .vidioc_enum_framesizes = cafe_vidioc_enum_framesizes, + .vidioc_enum_frameintervals = cafe_vidioc_enum_frameintervals, .vidioc_g_chip_ident = cafe_vidioc_g_chip_ident, #ifdef CONFIG_VIDEO_ADV_DEBUG .vidioc_g_register = cafe_vidioc_g_register, @@ -1890,11 +1976,33 @@ static irqreturn_t cafe_irq(int irq, void *data) * PCI interface stuff. */ +static const struct dmi_system_id olpc_xo1_dmi[] = { + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "OLPC"), + DMI_MATCH(DMI_PRODUCT_NAME, "XO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "1"), + }, + }, + { } +}; + static int cafe_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) { int ret; struct cafe_camera *cam; + struct ov7670_config sensor_cfg = { + /* This controller only does SMBUS */ + .use_smbus = true, + + /* + * Exclude QCIF mode, because it only captures a tiny portion + * of the sensor FOV + */ + .min_width = 320, + .min_height = 240, + }; /* * Start putting together one of our big camera structures. @@ -1915,6 +2023,7 @@ static int cafe_pci_probe(struct pci_dev *pdev, init_waitqueue_head(&cam->iowait); cam->pdev = pdev; cam->pix_format = cafe_def_pix_format; + cam->mbus_code = cafe_def_mbus_code; INIT_LIST_HEAD(&cam->dev_list); INIT_LIST_HEAD(&cam->sb_avail); INIT_LIST_HEAD(&cam->sb_full); @@ -1951,13 +2060,18 @@ static int cafe_pci_probe(struct pci_dev *pdev, if (ret) goto out_freeirq; + /* Apply XO-1 clock speed */ + if (dmi_check_system(olpc_xo1_dmi)) + sensor_cfg.clock_speed = 45; + cam->sensor_addr = 0x42; cam->sensor = v4l2_i2c_new_subdev(&cam->v4l2_dev, &cam->i2c_adapter, - "ov7670", "ov7670", cam->sensor_addr, NULL); + NULL, "ov7670", cam->sensor_addr, NULL); if (cam->sensor == NULL) { ret = -ENODEV; goto out_smbus; } + ret = cafe_cam_init(cam); if (ret) goto out_smbus; |