From patchwork Mon Jun 7 23:26:15 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Corbet X-Patchwork-Id: 104840 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.3) with ESMTP id o57NQL2H024486 for ; Mon, 7 Jun 2010 23:26:22 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750834Ab0FGX0U (ORCPT ); Mon, 7 Jun 2010 19:26:20 -0400 Received: from tex.lwn.net ([70.33.254.29]:47764 "EHLO vena.lwn.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750709Ab0FGX0T (ORCPT ); Mon, 7 Jun 2010 19:26:19 -0400 Received: from bike.lwn.net (c-71-196-136-44.hsd1.co.comcast.net [71.196.136.44]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by vena.lwn.net (Postfix) with ESMTP id A5AB215400AD; Mon, 7 Jun 2010 17:26:17 -0600 (MDT) Date: Mon, 7 Jun 2010 17:26:15 -0600 From: Jonathan Corbet To: Mauro Carvalho Chehab Cc: linux-media@vger.kernel.org, Florian Tobias Schandinat Subject: [PATCH] Add the viafb video capture driver Message-ID: <20100607172615.311edce9@bike.lwn.net> Organization: LWN.net X-Mailer: Claws Mail 3.7.6 (GTK+ 2.21.0; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Mon, 07 Jun 2010 23:26:22 +0000 (UTC) diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig index bdbc9d3..a26ded1 100644 --- a/drivers/media/video/Kconfig +++ b/drivers/media/video/Kconfig @@ -853,6 +853,16 @@ config VIDEO_CAFE_CCIC CMOS camera controller. This is the controller found on first- generation OLPC systems. +config VIDEO_VIA_CAMERA + tristate "VIAFB camera controller support" + depends on FB_VIA + select VIDEOBUF_DMA_SG + select VIDEO_OV7670 + help + Driver support for the integrated camera controller in VIA + Chrome9 chipsets. Currently only tested on OLPC xo-1.5 systems + with ov7670 sensors. + config SOC_CAMERA tristate "SoC camera support" depends on VIDEO_V4L2 && HAS_DMA && I2C diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile index cc93859..47fa0c0 100644 --- a/drivers/media/video/Makefile +++ b/drivers/media/video/Makefile @@ -126,6 +126,8 @@ obj-$(CONFIG_VIDEO_CX2341X) += cx2341x.o obj-$(CONFIG_VIDEO_CAFE_CCIC) += cafe_ccic.o +obj-$(CONFIG_VIDEO_VIA_CAMERA) += via-camera.o + obj-$(CONFIG_USB_DABUSB) += dabusb.o obj-$(CONFIG_USB_OV511) += ov511.o obj-$(CONFIG_USB_SE401) += se401.o diff --git a/drivers/media/video/via-camera.c b/drivers/media/video/via-camera.c new file mode 100644 index 0000000..7b1ff0c --- /dev/null +++ b/drivers/media/video/via-camera.c @@ -0,0 +1,1368 @@ +/* + * Driver for the VIA Chrome integrated camera controller. + * + * Copyright 2009,2010 Jonathan Corbet + * Distributable under the terms of the GNU General Public License, version 2 + * + * This work was supported by the One Laptop Per Child project + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "via-camera.h" + +MODULE_AUTHOR("Jonathan Corbet "); +MODULE_DESCRIPTION("VIA framebuffer-based camera controller driver"); +MODULE_LICENSE("GPL"); + +static int flip_image; +module_param(flip_image, bool, 0444); +MODULE_PARM_DESC(flip_image, + "If set, the sensor will be instructed to flip the image " + "vertically."); + +#ifdef CONFIG_OLPC_XO_1_5 +static int override_serial; +module_param(override_serial, bool, 0444); +MODULE_PARM_DESC(override_serial, + "The camera driver will normally refuse to load if " + "the XO 1.5 serial port is enabled. Set this option " + "to force the issue."); +#endif + +/* + * Basic window sizes. + */ +#define VGA_WIDTH 640 +#define VGA_HEIGHT 480 +#define QCIF_WIDTH 176 +#define QCIF_HEIGHT 144 + +/* + * The structure describing our camera. + */ +enum viacam_opstate { S_IDLE = 0, S_RUNNING = 1 }; + +static struct via_camera { + struct v4l2_device v4l2_dev; + struct video_device vdev; + struct v4l2_subdev *sensor; + struct platform_device *platdev; + struct viafb_dev *viadev; + struct mutex lock; + enum viacam_opstate opstate; + unsigned long flags; + /* + * GPIO info for power/reset management + */ + int power_gpio; + int reset_gpio; + /* + * I/O memory stuff. + */ + void __iomem *mmio; /* Where the registers live */ + void __iomem *fbmem; /* Frame buffer memory */ + u32 fb_offset; /* Reserved memory offset (FB) */ + /* + * Capture buffers and related. The controller supports + * up to three, so that's what we have here. These buffers + * live in frame buffer memory, so we don't call them "DMA". + */ + unsigned int cb_offsets[3]; /* offsets into fb mem */ + u8 *cb_addrs[3]; /* Kernel-space addresses */ + int n_cap_bufs; /* How many are we using? */ + int next_buf; + struct videobuf_queue vb_queue; + struct list_head buffer_queue; /* prot. by reg_lock */ + /* + * User tracking. + */ + int users; + struct file *owner; + /* + * Video format information. sensor_format is kept in a form + * that we can use to pass to the sensor. We always run the + * sensor in VGA resolution, though, and let the controller + * downscale things if need be. So we keep the "real* + * dimensions separately. + */ + struct v4l2_pix_format sensor_format; + struct v4l2_pix_format user_format; +} via_cam_info; + +/* + * Flag values, manipulated with bitops + */ +#define CF_DMA_ACTIVE 0 /* A frame is incoming */ +#define CF_CONFIG_NEEDED 1 /* Must configure hardware */ + + +/* + * Nasty ugly v4l2 boilerplate. + */ +#define sensor_call(cam, optype, func, args...) \ + v4l2_subdev_call(cam->sensor, optype, func, ##args) + +/* + * Debugging and related. + */ +#define cam_err(cam, fmt, arg...) \ + dev_err(&(cam)->platdev->dev, fmt, ##arg); +#define cam_warn(cam, fmt, arg...) \ + dev_warn(&(cam)->platdev->dev, fmt, ##arg); +#define cam_dbg(cam, fmt, arg...) \ + dev_dbg(&(cam)->platdev->dev, fmt, ##arg); + + +/*--------------------------------------------------------------------------*/ +/* + * Sensor power/reset management. This piece is OLPC-specific for + * sure; other configurations will have things connected differently. + */ +static int via_sensor_power_setup(struct via_camera *cam) +{ + int ret; + + cam->power_gpio = viafb_gpio_lookup("VGPIO3"); + cam->reset_gpio = viafb_gpio_lookup("VGPIO2"); + if (cam->power_gpio < 0 || cam->reset_gpio < 0) { + dev_err(&cam->platdev->dev, "Unable to find GPIO lines\n"); + return -EINVAL; + } + ret = gpio_request(cam->power_gpio, "viafb-camera"); + if (ret) { + dev_err(&cam->platdev->dev, "Unable to request power GPIO\n"); + return ret; + } + ret = gpio_request(cam->reset_gpio, "viafb-camera"); + if (ret) { + dev_err(&cam->platdev->dev, "Unable to request reset GPIO\n"); + gpio_free(cam->power_gpio); + return ret; + } + gpio_direction_output(cam->power_gpio, 0); + gpio_direction_output(cam->reset_gpio, 0); + return 0; +} + +/* + * Power up the sensor and perform the reset dance. + */ +static void via_sensor_power_up(struct via_camera *cam) +{ + gpio_set_value(cam->power_gpio, 1); + gpio_set_value(cam->reset_gpio, 0); + msleep(20); /* Probably excessive */ + gpio_set_value(cam->reset_gpio, 1); + msleep(20); +} + +static void via_sensor_power_down(struct via_camera *cam) +{ + gpio_set_value(cam->power_gpio, 0); + gpio_set_value(cam->reset_gpio, 0); +} + + +static void via_sensor_power_release(struct via_camera *cam) +{ + via_sensor_power_down(cam); + gpio_free(cam->power_gpio); + gpio_free(cam->reset_gpio); +} + +/* --------------------------------------------------------------------------*/ +/* Sensor ops */ + +/* + * Manage the ov7670 "flip" bit, which needs special help. + */ +static int viacam_set_flip(struct via_camera *cam) +{ + struct v4l2_control ctrl; + + memset(&ctrl, 0, sizeof(ctrl)); + ctrl.id = V4L2_CID_VFLIP; + ctrl.value = flip_image; + return sensor_call(cam, core, s_ctrl, &ctrl); +} + +/* + * Configure the sensor. It's up to the caller to ensure + * that the camera is in the correct operating state. + */ +static int viacam_configure_sensor(struct via_camera *cam) +{ + struct v4l2_format fmt; + int ret; + + fmt.fmt.pix = cam->sensor_format; + ret = sensor_call(cam, core, init, 0); + if (ret == 0) + ret = sensor_call(cam, video, s_fmt, &fmt); + /* + * OV7670 does weird things if flip is set *before* format... + */ + if (ret == 0) + ret = viacam_set_flip(cam); + return ret; +} + + + +/* --------------------------------------------------------------------------*/ +/* + * Some simple register accessors; they assume that the lock is held. + * + * Should we want to support the second capture engine, we could + * hide the register difference by adding 0x1000 to registers in the + * 0x300-350 range. + */ +static inline void viacam_write_reg(struct via_camera *cam, + int reg, int value) +{ + iowrite32(value, cam->mmio + reg); +} + +static inline int viacam_read_reg(struct via_camera *cam, int reg) +{ + return ioread32(cam->mmio + reg); +} + +static inline void viacam_write_reg_mask(struct via_camera *cam, + int reg, int value, int mask) +{ + int tmp = viacam_read_reg(cam, reg); + + tmp = (tmp & ~mask) | (value & mask); + viacam_write_reg(cam, reg, tmp); +} + + +/* --------------------------------------------------------------------------*/ +/* Interrupt management and handling */ + +static irqreturn_t viacam_quick_irq(int irq, void *data) +{ + struct via_camera *cam = data; + irqreturn_t ret = IRQ_NONE; + int icv; + + /* + * All we do here is to clear the interrupts and tell + * the handler thread to wake up. + */ + spin_lock(&cam->viadev->reg_lock); + icv = viacam_read_reg(cam, VCR_INTCTRL); + if (icv & VCR_IC_EAV) { + icv |= VCR_IC_EAV|VCR_IC_EVBI|VCR_IC_FFULL; + viacam_write_reg(cam, VCR_INTCTRL, icv); + ret = IRQ_WAKE_THREAD; + } + spin_unlock(&cam->viadev->reg_lock); + return ret; +} + +/* + * Find the next videobuf buffer which has somebody waiting on it. + */ +static struct videobuf_buffer *viacam_next_buffer(struct via_camera *cam) +{ + unsigned long flags; + struct videobuf_buffer *buf = NULL; + + spin_lock_irqsave(&cam->viadev->reg_lock, flags); + if (cam->opstate != S_RUNNING) + goto out; + if (list_empty(&cam->buffer_queue)) + goto out; + buf = list_entry(cam->buffer_queue.next, struct videobuf_buffer, queue); + if (!waitqueue_active(&buf->done)) {/* Nobody waiting */ + buf = NULL; + goto out; + } + list_del(&buf->queue); + buf->state = VIDEOBUF_ACTIVE; +out: + spin_unlock_irqrestore(&cam->viadev->reg_lock, flags); + return buf; +} + +/* + * The threaded IRQ handler. + */ +static irqreturn_t viacam_irq(int irq, void *data) +{ + int bufn; + struct videobuf_buffer *vb; + struct via_camera *cam = data; + struct videobuf_dmabuf *vdma; + + /* + * If there is no place to put the data frame, don't bother + * with anything else. + */ + vb = viacam_next_buffer(cam); + if (vb == NULL) + goto done; + /* + * Figure out which buffer we just completed. + */ + bufn = (viacam_read_reg(cam, VCR_INTCTRL) & VCR_IC_ACTBUF) >> 3; + bufn -= 1; + if (bufn < 0) + bufn = cam->n_cap_bufs - 1; + /* + * Copy over the data and let any waiters know. + */ + vdma = videobuf_to_dma(vb); + viafb_dma_copy_out_sg(cam->cb_offsets[bufn], vdma->sglist, vdma->sglen); + vb->state = VIDEOBUF_DONE; + vb->size = cam->user_format.sizeimage; + wake_up(&vb->done); +done: + return IRQ_HANDLED; +} + + +/* + * These functions must mess around with the general interrupt + * control register, which is relevant to much more than just the + * camera. Nothing else uses interrupts, though, as of this writing. + * Should that situation change, we'll have to improve support at + * the via-core level. + */ +static void viacam_int_enable(struct via_camera *cam) +{ + viacam_write_reg(cam, VCR_INTCTRL, + VCR_IC_INTEN|VCR_IC_EAV|VCR_IC_EVBI|VCR_IC_FFULL); + viafb_irq_enable(VDE_I_C0AVEN); +} + +static void viacam_int_disable(struct via_camera *cam) +{ + viafb_irq_disable(VDE_I_C0AVEN); + viacam_write_reg(cam, VCR_INTCTRL, 0); +} + + + +/* --------------------------------------------------------------------------*/ +/* Controller operations */ + +/* + * Set up our capture buffers in framebuffer memory. + */ +static int viacam_ctlr_cbufs(struct via_camera *cam) +{ + int nbuf = cam->viadev->camera_fbmem_size/cam->sensor_format.sizeimage; + int i; + unsigned int offset; + + /* + * See how many buffers we can work with. + */ + if (nbuf >= 3) { + cam->n_cap_bufs = 3; + viacam_write_reg_mask(cam, VCR_CAPINTC, VCR_CI_3BUFS, + VCR_CI_3BUFS); + } else if (nbuf == 2) { + cam->n_cap_bufs = 2; + viacam_write_reg_mask(cam, VCR_CAPINTC, 0, VCR_CI_3BUFS); + } else { + cam_warn(cam, "Insufficient frame buffer memory\n"); + return -ENOMEM; + } + /* + * Set them up. + */ + offset = cam->fb_offset; + for (i = 0; i < cam->n_cap_bufs; i++) { + cam->cb_offsets[i] = offset; + cam->cb_addrs[i] = cam->fbmem + offset; + viacam_write_reg(cam, VCR_VBUF1 + i*4, offset & VCR_VBUF_MASK); + offset += cam->sensor_format.sizeimage; + } + return 0; +} + +/* + * Set the scaling register for downscaling the image. + * + * This register works like this... Vertical scaling is enabled + * by bit 26; if that bit is set, downscaling is controlled by the + * value in bits 16:25. Those bits are divided by 1024 to get + * the scaling factor; setting just bit 25 thus cuts the height + * in half. + * + * Horizontal scaling works about the same, but it's enabled by + * bit 11, with bits 0:10 giving the numerator of a fraction + * (over 2048) for the scaling value. + * + * This function is naive in that, if the user departs from + * the 3x4 VGA scaling factor, the image will distort. We + * could work around that if it really seemed important. + */ +static void viacam_set_scale(struct via_camera *cam) +{ + unsigned int avscale; + int sf; + + if (cam->user_format.width == VGA_WIDTH) + avscale = 0; + else { + sf = (cam->user_format.width*2048)/VGA_WIDTH; + avscale = VCR_AVS_HEN | sf; + } + if (cam->user_format.height < VGA_HEIGHT) { + sf = (1024*cam->user_format.height)/VGA_HEIGHT; + avscale |= VCR_AVS_VEN | (sf << 16); + } + viacam_write_reg(cam, VCR_AVSCALE, avscale); +} + + +/* + * Configure image-related information into the capture engine. + */ +static void viacam_ctlr_image(struct via_camera *cam) +{ + int cicreg; + + /* + * Disable clock before messing with stuff - from the via + * sample driver. + */ + viacam_write_reg(cam, VCR_CAPINTC, ~VCR_CI_ENABLE); + viacam_write_reg(cam, VCR_CAPINTC, ~(VCR_CI_ENABLE|VCR_CI_CLKEN)); + /* + * Disable a bunch of stuff. + */ + viacam_write_reg(cam, VCR_HORRANGE, 0x06200120); + viacam_write_reg(cam, VCR_VERTRANGE, 0x01de0000); + viacam_set_scale(cam); + /* + * Image size info. + */ + viacam_write_reg(cam, VCR_MAXDATA, + (cam->sensor_format.height << 16) | + (cam->sensor_format.bytesperline >> 3)); + viacam_write_reg(cam, VCR_MAXVBI, 0); + viacam_write_reg(cam, VCR_VSTRIDE, + cam->user_format.bytesperline & VCR_VS_STRIDE); + /* + * Set up the capture interface control register, + * everything but the "go" bit. + * + * The FIFO threshold is a bit of a magic number; 8 is what + * VIA's sample code uses. + */ + cicreg = VCR_CI_CLKEN | + 0x08000000 | /* FIFO threshold */ + VCR_CI_FLDINV | /* OLPC-specific? */ + VCR_CI_VREFINV | /* OLPC-specific? */ + VCR_CI_DIBOTH | /* Capture both fields */ + VCR_CI_CCIR601_8; + if (cam->n_cap_bufs == 3) + cicreg |= VCR_CI_3BUFS; + /* + * YUV formats need different byte swapping than RGB. + */ + if (cam->user_format.pixelformat == V4L2_PIX_FMT_YUYV) + cicreg |= VCR_CI_YUYV; + else + cicreg |= VCR_CI_UYVY; + viacam_write_reg(cam, VCR_CAPINTC, cicreg); +} + + +static int viacam_config_controller(struct via_camera *cam) +{ + int ret; + unsigned long flags; + + spin_lock_irqsave(&cam->viadev->reg_lock, flags); + ret = viacam_ctlr_cbufs(cam); + if (!ret) + viacam_ctlr_image(cam); + spin_unlock_irqrestore(&cam->viadev->reg_lock, flags); + clear_bit(CF_CONFIG_NEEDED, &cam->flags); + return ret; +} + +/* + * Make it start grabbing data. + */ +static void viacam_start_engine(struct via_camera *cam) +{ + spin_lock_irq(&cam->viadev->reg_lock); + cam->next_buf = 0; + viacam_write_reg_mask(cam, VCR_CAPINTC, VCR_CI_ENABLE, VCR_CI_ENABLE); + viacam_int_enable(cam); + (void) viacam_read_reg(cam, VCR_CAPINTC); /* Force post */ + cam->opstate = S_RUNNING; + spin_unlock_irq(&cam->viadev->reg_lock); +} + + +static void viacam_stop_engine(struct via_camera *cam) +{ + spin_lock_irq(&cam->viadev->reg_lock); + viacam_int_disable(cam); + viacam_write_reg_mask(cam, VCR_CAPINTC, 0, VCR_CI_ENABLE); + (void) viacam_read_reg(cam, VCR_CAPINTC); /* Force post */ + cam->opstate = S_IDLE; + spin_unlock_irq(&cam->viadev->reg_lock); +} + + +/* --------------------------------------------------------------------------*/ +/* Videobuf callback ops */ + +/* + * buffer_setup. The purpose of this one would appear to be to tell + * videobuf how big a single image is. It's also evidently up to us + * to put some sort of limit on the maximum number of buffers allowed. + */ +static int viacam_vb_buf_setup(struct videobuf_queue *q, + unsigned int *count, unsigned int *size) +{ + struct via_camera *cam = q->priv_data; + + *size = cam->user_format.sizeimage; + if (*count == 0 || *count > 6) /* Arbitrary number */ + *count = 6; + return 0; +} + +/* + * Prepare a buffer. + */ +static int viacam_vb_buf_prepare(struct videobuf_queue *q, + struct videobuf_buffer *vb, enum v4l2_field field) +{ + struct via_camera *cam = q->priv_data; + + vb->size = cam->user_format.sizeimage; + vb->width = cam->user_format.width; /* bytesperline???? */ + vb->height = cam->user_format.height; + vb->field = field; + if (vb->state == VIDEOBUF_NEEDS_INIT) { + int ret = videobuf_iolock(q, vb, NULL); + if (ret) + return ret; + } + vb->state = VIDEOBUF_PREPARED; + return 0; +} + +/* + * We've got a buffer to put data into. + * + * FIXME: check for a running engine and valid buffers? + */ +static void viacam_vb_buf_queue(struct videobuf_queue *q, + struct videobuf_buffer *vb) +{ + struct via_camera *cam = q->priv_data; + + /* + * Note that videobuf holds the lock when it calls + * us, so we need not (indeed, cannot) take it here. + */ + vb->state = VIDEOBUF_QUEUED; + list_add_tail(&vb->queue, &cam->buffer_queue); +} + +/* + * Free a buffer. + */ +static void viacam_vb_buf_release(struct videobuf_queue *q, + struct videobuf_buffer *vb) +{ + videobuf_dma_unmap(q, videobuf_to_dma(vb)); + videobuf_dma_free(videobuf_to_dma(vb)); + vb->state = VIDEOBUF_NEEDS_INIT; +} + +static const struct videobuf_queue_ops viacam_vb_ops = { + .buf_setup = viacam_vb_buf_setup, + .buf_prepare = viacam_vb_buf_prepare, + .buf_queue = viacam_vb_buf_queue, + .buf_release = viacam_vb_buf_release, +}; + +/* --------------------------------------------------------------------------*/ +/* File operations */ + +static int viacam_open(struct file *filp) +{ + struct via_camera *cam = video_drvdata(filp); + + filp->private_data = cam; + /* + * Note the new user. If this is the first one, we'll also + * need to power up the sensor. + */ + mutex_lock(&cam->lock); + if (cam->users == 0) { + int ret = viafb_request_dma(); + + if (ret) { + mutex_unlock(&cam->lock); + return ret; + } + via_sensor_power_up(cam); + set_bit(CF_CONFIG_NEEDED, &cam->flags); + /* + * Hook into videobuf. Evidently this cannot fail. + */ + videobuf_queue_sg_init(&cam->vb_queue, &viacam_vb_ops, + &cam->platdev->dev, &cam->viadev->reg_lock, + V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_NONE, + sizeof(struct videobuf_buffer), cam); + } + (cam->users)++; + mutex_unlock(&cam->lock); + return 0; +} + +static int viacam_release(struct file *filp) +{ + struct via_camera *cam = video_drvdata(filp); + + mutex_lock(&cam->lock); + (cam->users)--; + /* + * If the "owner" is closing, shut down any ongoing + * operations. + */ + if (filp == cam->owner) { + videobuf_stop(&cam->vb_queue); + if (cam->opstate != S_IDLE) + viacam_stop_engine(cam); + cam->owner = NULL; + } + /* + * Last one out needs to turn out the lights. + */ + if (cam->users == 0) { + videobuf_mmap_free(&cam->vb_queue); + via_sensor_power_down(cam); + viafb_release_dma(); + } + mutex_unlock(&cam->lock); + return 0; +} + +/* + * Read a frame from the device. + */ +static ssize_t viacam_read(struct file *filp, char __user *buffer, + size_t len, loff_t *pos) +{ + struct via_camera *cam = video_drvdata(filp); + int ret; + + mutex_lock(&cam->lock); + /* + * Enforce the V4l2 "only one owner gets to read data" rule. + */ + if (cam->owner && cam->owner != filp) { + ret = -EBUSY; + goto out_unlock; + } + cam->owner = filp; + /* + * Do we need to configure the hardware? + */ + if (test_bit(CF_CONFIG_NEEDED, &cam->flags)) { + ret = viacam_configure_sensor(cam); + if (!ret) + ret = viacam_config_controller(cam); + if (ret) + goto out_unlock; + } + /* + * Fire up the capture engine, then have videobuf do + * the heavy lifting. Someday it would be good to avoid + * stopping and restarting the engine each time. + */ + INIT_LIST_HEAD(&cam->buffer_queue); + viacam_start_engine(cam); + ret = videobuf_read_stream(&cam->vb_queue, buffer, len, pos, 0, + filp->f_flags & O_NONBLOCK); + viacam_stop_engine(cam); + /* videobuf_stop() ?? */ + +out_unlock: + mutex_unlock(&cam->lock); + return ret; +} + + +static unsigned int viacam_poll(struct file *filp, struct poll_table_struct *pt) +{ + struct via_camera *cam = video_drvdata(filp); + + return videobuf_poll_stream(filp, &cam->vb_queue, pt); +} + + +static int viacam_mmap(struct file *filp, struct vm_area_struct *vma) +{ + struct via_camera *cam = video_drvdata(filp); + + return videobuf_mmap_mapper(&cam->vb_queue, vma); +} + + + +static const struct v4l2_file_operations viacam_fops = { + .owner = THIS_MODULE, + .open = viacam_open, + .release = viacam_release, + .read = viacam_read, + .poll = viacam_poll, + .mmap = viacam_mmap, + .ioctl = video_ioctl2, +}; + +/*----------------------------------------------------------------------------*/ +/* + * The long list of v4l2 ioctl ops + */ + +static int viacam_g_chip_ident(struct file *file, void *priv, + struct v4l2_dbg_chip_ident *ident) +{ + struct via_camera *cam = priv; + + ident->ident = V4L2_IDENT_NONE; + ident->revision = 0; + if (v4l2_chip_match_host(&ident->match)) { + ident->ident = V4L2_IDENT_VIA_VX855; + return 0; + } + return sensor_call(cam, core, g_chip_ident, ident); +} + +/* + * Control ops are passed through to the sensor. + */ +static int viacam_queryctrl(struct file *filp, void *priv, + struct v4l2_queryctrl *qc) +{ + struct via_camera *cam = priv; + int ret; + + mutex_lock(&cam->lock); + ret = sensor_call(cam, core, queryctrl, qc); + mutex_unlock(&cam->lock); + return ret; +} + + +static int viacam_g_ctrl(struct file *filp, void *priv, + struct v4l2_control *ctrl) +{ + struct via_camera *cam = priv; + int ret; + + mutex_lock(&cam->lock); + ret = sensor_call(cam, core, g_ctrl, ctrl); + mutex_unlock(&cam->lock); + return ret; +} + + +static int viacam_s_ctrl(struct file *filp, void *priv, + struct v4l2_control *ctrl) +{ + struct via_camera *cam = priv; + int ret; + + mutex_lock(&cam->lock); + ret = sensor_call(cam, core, s_ctrl, ctrl); + mutex_unlock(&cam->lock); + return ret; +} + +/* + * Only one input. + */ +static int viacam_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 viacam_g_input(struct file *filp, void *priv, unsigned int *i) +{ + *i = 0; + return 0; +} + +static int viacam_s_input(struct file *filp, void *priv, unsigned int i) +{ + if (i != 0) + return -EINVAL; + return 0; +} + +static int viacam_s_std(struct file *filp, void *priv, v4l2_std_id *std) +{ + return 0; +} + +/* + * Video format stuff. Here is our default format until + * user space messes with things. + */ +static struct v4l2_pix_format viacam_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 viacam_enum_fmt_vid_cap(struct file *filp, void *priv, + struct v4l2_fmtdesc *fmt) +{ + struct via_camera *cam = priv; + int ret; + + mutex_lock(&cam->lock); + ret = sensor_call(cam, video, enum_fmt, fmt); + mutex_unlock(&cam->lock); + return ret; +} + +/* + * Figure out proper image dimensions, but always force the + * sensor to VGA. + */ +static void viacam_fmt_pre(struct v4l2_pix_format *userfmt, + struct v4l2_pix_format *sensorfmt) +{ + *sensorfmt = *userfmt; + if (userfmt->width < QCIF_WIDTH || userfmt->height < QCIF_HEIGHT) { + userfmt->width = QCIF_WIDTH; + userfmt->height = QCIF_HEIGHT; + } + if (userfmt->width > VGA_WIDTH || userfmt->height > VGA_HEIGHT) { + userfmt->width = VGA_WIDTH; + userfmt->height = VGA_HEIGHT; + } + sensorfmt->width = VGA_WIDTH; + sensorfmt->height = VGA_HEIGHT; +} + +static void viacam_fmt_post(struct v4l2_pix_format *userfmt, + struct v4l2_pix_format *sensorfmt) +{ + userfmt->pixelformat = sensorfmt->pixelformat; + userfmt->field = sensorfmt->field; + userfmt->bytesperline = 2*userfmt->width; + userfmt->sizeimage = userfmt->bytesperline*userfmt->height; +} + +static int viacam_try_fmt_vid_cap(struct file *filp, void *priv, + struct v4l2_format *fmt) +{ + struct via_camera *cam = priv; + int ret; + struct v4l2_format sfmt; + + viacam_fmt_pre(&fmt->fmt.pix, &sfmt.fmt.pix); + mutex_lock(&cam->lock); + ret = sensor_call(cam, video, try_fmt, &sfmt); + mutex_unlock(&cam->lock); + viacam_fmt_post(&fmt->fmt.pix, &sfmt.fmt.pix); + return ret; +} + +static int viacam_g_fmt_vid_cap(struct file *filp, void *priv, + struct v4l2_format *fmt) +{ + struct via_camera *cam = priv; + + fmt->fmt.pix = cam->user_format; + return 0; +} + +static int viacam_s_fmt_vid_cap(struct file *filp, void *priv, + struct v4l2_format *fmt) +{ + struct via_camera *cam = priv; + int ret; + struct v4l2_format sfmt; + + /* + * Camera must be idle or we can't mess with the + * video setup. + */ + if (cam->opstate != S_IDLE) + return -EBUSY; + /* + * Let the sensor code look over and tweak the + * requested formatting. + */ + mutex_lock(&cam->lock); + viacam_fmt_pre(&fmt->fmt.pix, &sfmt.fmt.pix); + ret = sensor_call(cam, video, try_fmt, &sfmt); + if (ret) + goto out; + viacam_fmt_post(&fmt->fmt.pix, &sfmt.fmt.pix); + /* + * OK, let's commit to the new format. + */ + cam->user_format = fmt->fmt.pix; + cam->sensor_format = sfmt.fmt.pix; + ret = viacam_configure_sensor(cam); + if (!ret) + ret = viacam_config_controller(cam); +out: + mutex_unlock(&cam->lock); + return ret; +} + +static int viacam_querycap(struct file *filp, void *priv, + struct v4l2_capability *cap) +{ + strcpy(cap->driver, "via-camera"); + strcpy(cap->card, "via-camera"); + cap->version = 1; + cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | + V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; + return 0; +} + +/* + * Streaming operations - pure videobuf stuff. + */ +static int viacam_reqbufs(struct file *filp, void *priv, + struct v4l2_requestbuffers *rb) +{ + struct via_camera *cam = priv; + + return videobuf_reqbufs(&cam->vb_queue, rb); +} + +static int viacam_querybuf(struct file *filp, void *priv, + struct v4l2_buffer *buf) +{ + struct via_camera *cam = priv; + + return videobuf_querybuf(&cam->vb_queue, buf); +} + +static int viacam_qbuf(struct file *filp, void *priv, struct v4l2_buffer *buf) +{ + struct via_camera *cam = priv; + + return videobuf_qbuf(&cam->vb_queue, buf); +} + +static int viacam_dqbuf(struct file *filp, void *priv, struct v4l2_buffer *buf) +{ + struct via_camera *cam = priv; + + return videobuf_dqbuf(&cam->vb_queue, buf, filp->f_flags & O_NONBLOCK); +} + +static int viacam_streamon(struct file *filp, void *priv, enum v4l2_buf_type t) +{ + struct via_camera *cam = priv; + int ret = 0; + + if (t != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + if (cam->opstate != S_IDLE) + return -EBUSY; + /* + * Enforce the V4l2 "only one owner gets to read data" rule. + */ + if (cam->owner && cam->owner != filp) + return -EBUSY; + cam->owner = filp; + /* + * Configure things if need be. + */ + if (test_bit(CF_CONFIG_NEEDED, &cam->flags)) { + mutex_lock(&cam->lock); + ret = viacam_configure_sensor(cam); + if (!ret) + ret = viacam_config_controller(cam); + mutex_unlock(&cam->lock); + } + /* + * If the CPU goes into C3, the DMA transfer gets corrupted and + * users start filing unsightly bug reports. Put in a "latency" + * requirement which will keep the CPU out of the deeper sleep + * states. + */ + pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY, "viafb-dma", 50); + /* + * Fire things up. + */ + if (!ret) { + INIT_LIST_HEAD(&cam->buffer_queue); + ret = videobuf_streamon(&cam->vb_queue); + if (!ret) + viacam_start_engine(cam); + } + return ret; +} + +static int viacam_streamoff(struct file *filp, void *priv, enum v4l2_buf_type t) +{ + struct via_camera *cam = priv; + int ret; + + if (t != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY, "viafb-dma"); + viacam_stop_engine(cam); + /* + * Videobuf will recycle all of the outstanding buffers, but + * we should be sure we don't retain any references to + * any of them. + */ + ret = videobuf_streamoff(&cam->vb_queue); + INIT_LIST_HEAD(&cam->buffer_queue); + return ret; +} + +#ifdef CONFIG_VIDEO_V4L1_COMPAT +static int viacam_vidiocgmbuf(struct file *filp, void *priv, + struct video_mbuf *mbuf) +{ + struct via_camera *cam = priv; + + return videobuf_cgmbuf(&cam->vb_queue, mbuf, 6); +} +#endif + +/* G/S_PARM */ + +static int viacam_g_parm(struct file *filp, void *priv, + struct v4l2_streamparm *parm) +{ + struct via_camera *cam = priv; + int ret; + + mutex_lock(&cam->lock); + ret = sensor_call(cam, video, g_parm, parm); + mutex_unlock(&cam->lock); + parm->parm.capture.readbuffers = cam->n_cap_bufs; + return ret; +} + +static int viacam_s_parm(struct file *filp, void *priv, + struct v4l2_streamparm *parm) +{ + struct via_camera *cam = priv; + int ret; + + mutex_lock(&cam->lock); + ret = sensor_call(cam, video, s_parm, parm); + mutex_unlock(&cam->lock); + parm->parm.capture.readbuffers = cam->n_cap_bufs; + return ret; +} + +static int viacam_enum_framesizes(struct file *filp, void *priv, + struct v4l2_frmsizeenum *sizes) +{ + if (sizes->index != 0) + return -EINVAL; + sizes->type = V4L2_FRMSIZE_TYPE_CONTINUOUS; + sizes->stepwise.min_width = QCIF_WIDTH; + sizes->stepwise.min_height = QCIF_HEIGHT; + sizes->stepwise.max_width = VGA_WIDTH; + sizes->stepwise.max_height = VGA_HEIGHT; + sizes->stepwise.step_width = sizes->stepwise.step_height = 1; + return 0; +} + +static int viacam_enum_frameintervals(struct file *filp, void *priv, + struct v4l2_frmivalenum *interval) +{ + struct via_camera *cam = priv; + int ret; + + mutex_lock(&cam->lock); + ret = sensor_call(cam, video, enum_frameintervals, interval); + mutex_unlock(&cam->lock); + return ret; +} + + + +static const struct v4l2_ioctl_ops viacam_ioctl_ops = { + .vidioc_g_chip_ident = viacam_g_chip_ident, + .vidioc_queryctrl = viacam_queryctrl, + .vidioc_g_ctrl = viacam_g_ctrl, + .vidioc_s_ctrl = viacam_s_ctrl, + .vidioc_enum_input = viacam_enum_input, + .vidioc_g_input = viacam_g_input, + .vidioc_s_input = viacam_s_input, + .vidioc_s_std = viacam_s_std, + .vidioc_enum_fmt_vid_cap = viacam_enum_fmt_vid_cap, + .vidioc_try_fmt_vid_cap = viacam_try_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = viacam_g_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = viacam_s_fmt_vid_cap, + .vidioc_querycap = viacam_querycap, + .vidioc_reqbufs = viacam_reqbufs, + .vidioc_querybuf = viacam_querybuf, + .vidioc_qbuf = viacam_qbuf, + .vidioc_dqbuf = viacam_dqbuf, + .vidioc_streamon = viacam_streamon, + .vidioc_streamoff = viacam_streamoff, + .vidioc_g_parm = viacam_g_parm, + .vidioc_s_parm = viacam_s_parm, + .vidioc_enum_framesizes = viacam_enum_framesizes, + .vidioc_enum_frameintervals = viacam_enum_frameintervals, +#ifdef CONFIG_VIDEO_V4L1_COMPAT + .vidiocgmbuf = viacam_vidiocgmbuf, +#endif +}; + +/*----------------------------------------------------------------------------*/ + +/* + * Power management. + */ + +/* + * Setup stuff. + */ + +static struct video_device viacam_v4l_template = { + .name = "via-camera", + .minor = -1, + .tvnorms = V4L2_STD_NTSC_M, + .current_norm = V4L2_STD_NTSC_M, + .fops = &viacam_fops, + .ioctl_ops = &viacam_ioctl_ops, + .release = video_device_release_empty, /* Check this */ +}; + + +static __devinit int viacam_probe(struct platform_device *pdev) +{ + int ret; + struct i2c_adapter *sensor_adapter; + struct viafb_dev *viadev = pdev->dev.platform_data; + + /* + * Note that there are actually two capture channels on + * the device. We only deal with one for now. That + * is encoded here; nothing else assumes it's dealing with + * a unique capture device. + */ + struct via_camera *cam = &via_cam_info; + + /* + * Ensure that frame buffer memory has been set aside for + * this purpose. As an arbitrary limit, refuse to work + * with less than two frames of VGA 16-bit data. + * + * If we ever support the second port, we'll need to set + * aside more memory. + */ + if (viadev->camera_fbmem_size < (VGA_HEIGHT*VGA_WIDTH*4)) { + printk(KERN_ERR "viacam: insufficient FB memory reserved\n"); + return -ENOMEM; + } + if (viadev->engine_mmio == NULL) { + printk(KERN_ERR "viacam: No I/O memory, so no pictures\n"); + return -ENOMEM; + } + /* + * Basic structure initialization. + */ + cam->platdev = pdev; + cam->viadev = viadev; + cam->users = 0; + cam->owner = NULL; + cam->opstate = S_IDLE; + cam->user_format = cam->sensor_format = viacam_def_pix_format; + mutex_init(&cam->lock); + INIT_LIST_HEAD(&cam->buffer_queue); + cam->mmio = viadev->engine_mmio; + cam->fbmem = viadev->fbmem; + cam->fb_offset = viadev->camera_fbmem_offset; + cam->flags = 1 << CF_CONFIG_NEEDED; + /* + * Tell V4L that we exist. + */ + ret = v4l2_device_register(&pdev->dev, &cam->v4l2_dev); + if (ret) { + dev_err(&pdev->dev, "Unable to register v4l2 device\n"); + return ret; + } + /* + * Convince the system that we can do DMA. + */ + pdev->dev.dma_mask = &viadev->pdev->dma_mask; + dma_set_mask(&pdev->dev, 0xffffffff); + /* + * Fire up the capture port. The write to 0x78 looks purely + * OLPCish; any system will need to tweak 0x1e. + */ + via_write_reg_mask(VIASR, 0x78, 0, 0x80); + via_write_reg_mask(VIASR, 0x1e, 0xc0, 0xc0); + /* + * Get the sensor powered up. + */ + ret = via_sensor_power_setup(cam); + if (ret) + goto out_unregister; + via_sensor_power_up(cam); + + /* + * See if we can't find it on the bus. The VIA_PORT_31 assumption + * is OLPC-specific. 0x42 assumption is ov7670-specific. + */ + sensor_adapter = viafb_find_i2c_adapter(VIA_PORT_31); + cam->sensor = v4l2_i2c_new_subdev(&cam->v4l2_dev, sensor_adapter, + "ov7670", "ov7670", 0x42 >> 1, NULL); + if (cam->sensor == NULL) { + dev_err(&pdev->dev, "Unable to find the sensor!\n"); + ret = -ENODEV; + goto out_power_down; + } + /* + * Get the IRQ. + */ + viacam_int_disable(cam); + ret = request_threaded_irq(viadev->pdev->irq, viacam_quick_irq, + viacam_irq, IRQF_SHARED, "via-camera", cam); + if (ret) + goto out_power_down; + /* + * Tell V4l2 that we exist. + */ + cam->vdev = viacam_v4l_template; + cam->vdev.v4l2_dev = &cam->v4l2_dev; + ret = video_register_device(&cam->vdev, VFL_TYPE_GRABBER, -1); + if (ret) + goto out_irq; + video_set_drvdata(&cam->vdev, cam); + + /* Power the sensor down until somebody opens the device */ + via_sensor_power_down(cam); + return 0; + +out_irq: + free_irq(viadev->pdev->irq, cam); +out_power_down: + via_sensor_power_release(cam); +out_unregister: + v4l2_device_unregister(&cam->v4l2_dev); + return ret; +} + +static __devexit int viacam_remove(struct platform_device *pdev) +{ + struct via_camera *cam = &via_cam_info; + struct viafb_dev *viadev = pdev->dev.platform_data; + + video_unregister_device(&cam->vdev); + v4l2_device_unregister(&cam->v4l2_dev); + free_irq(viadev->pdev->irq, cam); + via_sensor_power_release(cam); + return 0; +} + + +static struct platform_driver viacam_driver = { + .driver = { + .name = "viafb-camera", + }, + .probe = viacam_probe, + .remove = viacam_remove, +}; + + +#ifdef CONFIG_OLPC_XO_1_5 +/* + * The OLPC folks put the serial port on the same pin as + * the camera. They also get grumpy if we break the + * serial port and keep them from using it. So we have + * to check the serial enable bit and not step on it. + */ +#define VIACAM_SERIAL_DEVFN 0x88 +#define VIACAM_SERIAL_CREG 0x46 +#define VIACAM_SERIAL_BIT 0x40 + +static __devinit int viacam_check_serial_port(void) +{ + struct pci_bus *pbus = pci_find_bus(0, 0); + u8 cbyte; + + pci_bus_read_config_byte(pbus, VIACAM_SERIAL_DEVFN, + VIACAM_SERIAL_CREG, &cbyte); + if ((cbyte & VIACAM_SERIAL_BIT) == 0) + return 0; /* Not enabled */ + if (override_serial == 0) { + printk(KERN_NOTICE "Via camera: serial port is enabled, " \ + "refusing to load.\n"); + printk(KERN_NOTICE "Specify override_serial=1 to force " \ + "module loading.\n"); + return -EBUSY; + } + printk(KERN_NOTICE "Via camera: overriding serial port\n"); + pci_bus_write_config_byte(pbus, VIACAM_SERIAL_DEVFN, + VIACAM_SERIAL_CREG, cbyte & ~VIACAM_SERIAL_BIT); + return 0; +} +#endif + + + + +static int viacam_init(void) +{ +#ifdef CONFIG_OLPC_XO_1_5 + if (viacam_check_serial_port()) + return -EBUSY; +#endif + return platform_driver_register(&viacam_driver); +} +module_init(viacam_init); + +static void viacam_exit(void) +{ + platform_driver_unregister(&viacam_driver); +} +module_exit(viacam_exit); diff --git a/drivers/media/video/via-camera.h b/drivers/media/video/via-camera.h new file mode 100644 index 0000000..b12a4b3 --- /dev/null +++ b/drivers/media/video/via-camera.h @@ -0,0 +1,93 @@ +/* + * VIA Camera register definitions. + */ +#define VCR_INTCTRL 0x300 /* Capture interrupt control */ +#define VCR_IC_EAV 0x0001 /* End of active video status */ +#define VCR_IC_EVBI 0x0002 /* End of VBI status */ +#define VCR_IC_FBOTFLD 0x0004 /* "flipping" Bottom field is active */ +#define VCR_IC_ACTBUF 0x0018 /* Active video buffer */ +#define VCR_IC_VSYNC 0x0020 /* 0 = VB, 1 = active video */ +#define VCR_IC_BOTFLD 0x0040 /* Bottom field is active */ +#define VCR_IC_FFULL 0x0080 /* FIFO full */ +#define VCR_IC_INTEN 0x0100 /* End of active video int. enable */ +#define VCR_IC_VBIINT 0x0200 /* End of VBI int enable */ +#define VCR_IC_VBIBUF 0x0400 /* Current VBI buffer */ + +#define VCR_TSC 0x308 /* Transport stream control */ +#define VCR_TSC_ENABLE 0x000001 /* Transport stream input enable */ +#define VCR_TSC_DROPERR 0x000002 /* Drop error packets */ +#define VCR_TSC_METHOD 0x00000c /* DMA method (non-functional) */ +#define VCR_TSC_COUNT 0x07fff0 /* KByte or packet count */ +#define VCR_TSC_CBMODE 0x080000 /* Change buffer by byte count */ +#define VCR_TSC_PSSIG 0x100000 /* Packet starting signal disable */ +#define VCR_TSC_BE 0x200000 /* MSB first (serial mode) */ +#define VCR_TSC_SERIAL 0x400000 /* Serial input (0 = parallel) */ + +#define VCR_CAPINTC 0x310 /* Capture interface control */ +#define VCR_CI_ENABLE 0x00000001 /* Capture enable */ +#define VCR_CI_BSS 0x00000002 /* WTF "bit stream selection" */ +#define VCR_CI_3BUFS 0x00000004 /* 1 = 3 buffers, 0 = 2 buffers */ +#define VCR_CI_VIPEN 0x00000008 /* VIP enable */ +#define VCR_CI_CCIR601_8 0 /* CCIR601 input stream, 8 bit */ +#define VCR_CI_CCIR656_8 0x00000010 /* ... CCIR656, 8 bit */ +#define VCR_CI_CCIR601_16 0x00000020 /* ... CCIR601, 16 bit */ +#define VCR_CI_CCIR656_16 0x00000030 /* ... CCIR656, 16 bit */ +#define VCR_CI_HDMODE 0x00000040 /* CCIR656-16 hdr decode mode; 1=16b */ +#define VCR_CI_BSWAP 0x00000080 /* Swap bytes (16-bit) */ +#define VCR_CI_YUYV 0 /* Byte order 0123 */ +#define VCR_CI_UYVY 0x00000100 /* Byte order 1032 */ +#define VCR_CI_YVYU 0x00000200 /* Byte order 0321 */ +#define VCR_CI_VYUY 0x00000300 /* Byte order 3012 */ +#define VCR_CI_VIPTYPE 0x00000400 /* VIP type */ +#define VCR_CI_IFSEN 0x00000800 /* Input field signal enable */ +#define VCR_CI_DIODD 0 /* De-interlace odd, 30fps */ +#define VCR_CI_DIEVEN 0x00001000 /* ...even field, 30fps */ +#define VCR_CI_DIBOTH 0x00002000 /* ...both fields, 60fps */ +#define VCR_CI_DIBOTH30 0x00003000 /* ...both fields, 30fps interlace */ +#define VCR_CI_CONVTYPE 0x00004000 /* 4:2:2 to 4:4:4; 1 = interpolate */ +#define VCR_CI_CFC 0x00008000 /* Capture flipping control */ +#define VCR_CI_FILTER 0x00070000 /* Horiz filter mode select + 000 = none + 001 = 2 tap + 010 = 3 tap + 011 = 4 tap + 100 = 5 tap */ +#define VCR_CI_CLKINV 0x00080000 /* Input CLK inverted */ +#define VCR_CI_VREFINV 0x00100000 /* VREF inverted */ +#define VCR_CI_HREFINV 0x00200000 /* HREF inverted */ +#define VCR_CI_FLDINV 0x00400000 /* Field inverted */ +#define VCR_CI_CLKPIN 0x00800000 /* Capture clock pin */ +#define VCR_CI_THRESH 0x0f000000 /* Capture fifo threshold */ +#define VCR_CI_HRLE 0x10000000 /* Positive edge of HREF */ +#define VCR_CI_VRLE 0x20000000 /* Positive edge of VREF */ +#define VCR_CI_OFLDINV 0x40000000 /* Field output inverted */ +#define VCR_CI_CLKEN 0x80000000 /* Capture clock enable */ + +#define VCR_HORRANGE 0x314 /* Active video horizontal range */ +#define VCR_VERTRANGE 0x318 /* Active video vertical range */ +#define VCR_AVSCALE 0x31c /* Active video scaling control */ +#define VCR_AVS_HEN 0x00000800 /* Horizontal scale enable */ +#define VCR_AVS_VEN 0x04000000 /* Vertical enable */ +#define VCR_VBIHOR 0x320 /* VBI Data horizontal range */ +#define VCR_VBIVERT 0x324 /* VBI data vertical range */ +#define VCR_VBIBUF1 0x328 /* First VBI buffer */ +#define VCR_VBISTRIDE 0x32c /* VBI stride */ +#define VCR_ANCDATACNT 0x330 /* Ancillary data count setting */ +#define VCR_MAXDATA 0x334 /* Active data count of active video */ +#define VCR_MAXVBI 0x338 /* Maximum data count of VBI */ +#define VCR_CAPDATA 0x33c /* Capture data count */ +#define VCR_VBUF1 0x340 /* First video buffer */ +#define VCR_VBUF2 0x344 /* Second video buffer */ +#define VCR_VBUF3 0x348 /* Third video buffer */ +#define VCR_VBUF_MASK 0x1ffffff0 /* Bits 28:4 */ +#define VCR_VBIBUF2 0x34c /* Second VBI buffer */ +#define VCR_VSTRIDE 0x350 /* Stride of video + coring control */ +#define VCR_VS_STRIDE_SHIFT 4 +#define VCR_VS_STRIDE 0x00001ff0 /* Stride (8-byte units) */ +#define VCR_VS_CCD 0x007f0000 /* Coring compare data */ +#define VCR_VS_COREEN 0x00800000 /* Coring enable */ +#define VCR_TS0ERR 0x354 /* TS buffer 0 error indicator */ +#define VCR_TS1ERR 0x358 /* TS buffer 0 error indicator */ +#define VCR_TS2ERR 0x35c /* TS buffer 0 error indicator */ + +/* Add 0x1000 for the second capture engine registers */ diff --git a/drivers/video/via/accel.c b/drivers/video/via/accel.c index e44893e..04bec05 100644 --- a/drivers/video/via/accel.c +++ b/drivers/video/via/accel.c @@ -370,7 +370,7 @@ int viafb_init_engine(struct fb_info *info) viapar->shared->vq_vram_addr = viapar->fbmem_free; viapar->fbmem_used += VQ_SIZE; -#if defined(CONFIG_FB_VIA_CAMERA) || defined(CONFIG_FB_VIA_CAMERA_MODULE) +#if defined(CONFIG_VIDEO_VIA_CAMERA) || defined(CONFIG_VIDEO_VIA_CAMERA_MODULE) /* * Set aside a chunk of framebuffer memory for the camera * driver. Someday this driver probably needs a proper allocator diff --git a/drivers/video/via/via-core.c b/drivers/video/via/via-core.c index e8cfe83..2433259 100644 --- a/drivers/video/via/via-core.c +++ b/drivers/video/via/via-core.c @@ -95,6 +95,13 @@ EXPORT_SYMBOL_GPL(viafb_irq_disable); /* ---------------------------------------------------------------------- */ /* + * Currently, the camera driver is the only user of the DMA code, so we + * only compile it in if the camera driver is being built. Chances are, + * most viafb systems will not need to have this extra code for a while. + * As soon as another user comes long, the ifdef can be removed. + */ +#if defined(CONFIG_VIDEO_VIA_CAMERA) || defined(CONFIG_VIDEO_VIA_CAMERA_MODULE) +/* * Access to the DMA engine. This currently provides what the camera * driver needs (i.e. outgoing only) but is easily expandable if need * be. @@ -322,7 +329,7 @@ int viafb_dma_copy_out_sg(unsigned int offset, struct scatterlist *sg, int nsg) return 0; } EXPORT_SYMBOL_GPL(viafb_dma_copy_out_sg); - +#endif /* CONFIG_VIDEO_VIA_CAMERA */ /* ---------------------------------------------------------------------- */ /* @@ -507,7 +514,12 @@ static struct viafb_subdev_info { }, { .name = "viafb-i2c", - } + }, +#if defined(CONFIG_VIDEO_VIA_CAMERA) || defined(CONFIG_VIDEO_VIA_CAMERA_MODULE) + { + .name = "viafb-camera", + }, +#endif }; #define N_SUBDEVS ARRAY_SIZE(viafb_subdevs) diff --git a/include/linux/via-core.h b/include/linux/via-core.h index 7ffb521..38bffd8 100644 --- a/include/linux/via-core.h +++ b/include/linux/via-core.h @@ -81,7 +81,7 @@ struct viafb_dev { unsigned long fbmem_start; long fbmem_len; void __iomem *fbmem; -#if defined(CONFIG_FB_VIA_CAMERA) || defined(CONFIG_FB_VIA_CAMERA_MODULE) +#if defined(CONFIG_VIDEO_VIA_CAMERA) || defined(CONFIG_VIDEO_VIA_CAMERA_MODULE) long camera_fbmem_offset; long camera_fbmem_size; #endif @@ -138,6 +138,7 @@ void viafb_irq_disable(u32 mask); #define VDE_I_LVDSSIEN 0x40000000 /* LVDS Sense enable */ #define VDE_I_ENABLE 0x80000000 /* Global interrupt enable */ +#if defined(CONFIG_VIDEO_VIA_CAMERA) || defined(CONFIG_VIDEO_VIA_CAMERA_MODULE) /* * DMA management. */ @@ -172,6 +173,7 @@ int viafb_dma_copy_out_sg(unsigned int offset, struct scatterlist *sg, int nsg); */ #define VGA_WIDTH 640 #define VGA_HEIGHT 480 +#endif /* CONFIG_VIDEO_VIA_CAMERA */ /* * Indexed port operations. Note that these are all multi-op diff --git a/include/media/v4l2-chip-ident.h b/include/media/v4l2-chip-ident.h index 21b4428..6400c7c 100644 --- a/include/media/v4l2-chip-ident.h +++ b/include/media/v4l2-chip-ident.h @@ -111,6 +111,10 @@ enum { V4L2_IDENT_VPX3216B = 3216, V4L2_IDENT_VPX3220A = 3220, + /* VX855 just ident 3409 */ + /* Other via devs could use 3314, 3324, 3327, 3336, 3364, 3353 */ + V4L2_IDENT_VIA_VX855 = 3409, + /* module tvp5150 */ V4L2_IDENT_TVP5150 = 5150,