diff options
Diffstat (limited to 'drivers/staging/dt3155v4l/dt3155v4l.c')
| -rw-r--r-- | drivers/staging/dt3155v4l/dt3155v4l.c | 1200 |
1 files changed, 1200 insertions, 0 deletions
diff --git a/drivers/staging/dt3155v4l/dt3155v4l.c b/drivers/staging/dt3155v4l/dt3155v4l.c new file mode 100644 index 000000000000..6dc3af622848 --- /dev/null +++ b/drivers/staging/dt3155v4l/dt3155v4l.c @@ -0,0 +1,1200 @@ +/*************************************************************************** + * Copyright (C) 2006-2010 by Marin Mitov * + * mitov@issp.bas.bg * + * * + * This program is free software; you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation; either version 2 of the License, or * + * (at your option) any later version. * + * * + * This program is distributed in the hope that it will be useful, * + * but WITHOUT ANY WARRANTY; without even the implied warranty of * + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * + * GNU General Public License for more details. * + * * + * You should have received a copy of the GNU General Public License * + * along with this program; if not, write to the * + * Free Software Foundation, Inc., * + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * + ***************************************************************************/ + +#include <linux/version.h> +#include <linux/stringify.h> +#include <linux/delay.h> +#include <linux/kthread.h> +#include <media/v4l2-dev.h> +#include <media/v4l2-ioctl.h> +#include <media/videobuf-dma-contig.h> + +#include "dt3155v4l.h" + +#define DT3155_VENDOR_ID 0x8086 +#define DT3155_DEVICE_ID 0x1223 + +/* DT3155_CHUNK_SIZE is 4M (2^22) 8 full size buffers */ +#define DT3155_CHUNK_SIZE (1U << 22) + +#define DT3155_COH_FLAGS (GFP_KERNEL | GFP_DMA32 | __GFP_COLD | __GFP_NOWARN) + +#define DT3155_BUF_SIZE (768 * 576) + +/* global initializers (for all boards) */ +#ifdef CONFIG_DT3155_CCIR +static const u8 csr2_init = VT_50HZ; +#define DT3155_CURRENT_NORM V4L2_STD_625_50 +static const unsigned int img_width = 768; +static const unsigned int img_height = 576; +static const unsigned int frames_per_sec = 25; +static const struct v4l2_fmtdesc frame_std[] = { + { + .index = 0, + .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, + .flags = 0, + .description = "CCIR/50Hz 8 bits gray", + .pixelformat = V4L2_PIX_FMT_GREY, + }, +}; +#else +static const u8 csr2_init = VT_60HZ; +#define DT3155_CURRENT_NORM V4L2_STD_525_60 +static const unsigned int img_width = 640; +static const unsigned int img_height = 480; +static const unsigned int frames_per_sec = 30; +static const struct v4l2_fmtdesc frame_std[] = { + { + .index = 0, + .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, + .flags = 0, + .description = "RS-170/60Hz 8 bits gray", + .pixelformat = V4L2_PIX_FMT_GREY, + }, +}; +#endif + +#define NUM_OF_FORMATS ARRAY_SIZE(frame_std) + +static u8 config_init = ACQ_MODE_EVEN; + +/** + * read_i2c_reg - reads an internal i2c register + * + * @addr: dt3155 mmio base address + * @index: index (internal address) of register to read + * @data: pointer to byte the read data will be placed in + * + * returns: zero on success or error code + * + * This function starts reading the specified (by index) register + * and busy waits for the process to finish. The result is placed + * in a byte pointed by data. + */ +static int +read_i2c_reg(void __iomem *addr, u8 index, u8 *data) +{ + u32 tmp = index; + + iowrite32((tmp<<17) | IIC_READ, addr + IIC_CSR2); + mmiowb(); + udelay(45); /* wait at least 43 usec for NEW_CYCLE to clear */ + if (ioread32(addr + IIC_CSR2) & NEW_CYCLE) { + /* error: NEW_CYCLE not cleared */ + printk(KERN_ERR "dt3155: NEW_CYCLE not cleared\n"); + return -EIO; + } + tmp = ioread32(addr + IIC_CSR1); + if (tmp & DIRECT_ABORT) { + /* error: DIRECT_ABORT set */ + printk(KERN_ERR "dt3155: DIRECT_ABORT set\n"); + /* reset DIRECT_ABORT bit */ + iowrite32(DIRECT_ABORT, addr + IIC_CSR1); + return -EIO; + } + *data = tmp>>24; + return 0; +} + +/** + * write_i2c_reg - writes to an internal i2c register + * + * @addr: dt3155 mmio base address + * @index: index (internal address) of register to read + * @data: data to be written + * + * returns: zero on success or error code + * + * This function starts writting the specified (by index) register + * and busy waits for the process to finish. + */ +static int +write_i2c_reg(void __iomem *addr, u8 index, u8 data) +{ + u32 tmp = index; + + iowrite32((tmp<<17) | IIC_WRITE | data, addr + IIC_CSR2); + mmiowb(); + udelay(65); /* wait at least 63 usec for NEW_CYCLE to clear */ + if (ioread32(addr + IIC_CSR2) & NEW_CYCLE) { + /* error: NEW_CYCLE not cleared */ + printk(KERN_ERR "dt3155: NEW_CYCLE not cleared\n"); + return -EIO; + } + if (ioread32(addr + IIC_CSR1) & DIRECT_ABORT) { + /* error: DIRECT_ABORT set */ + printk(KERN_ERR "dt3155: DIRECT_ABORT set\n"); + /* reset DIRECT_ABORT bit */ + iowrite32(DIRECT_ABORT, addr + IIC_CSR1); + return -EIO; + } + return 0; +} + +/** + * write_i2c_reg_nowait - writes to an internal i2c register + * + * @addr: dt3155 mmio base address + * @index: index (internal address) of register to read + * @data: data to be written + * + * This function starts writting the specified (by index) register + * and then returns. + */ +static void write_i2c_reg_nowait(void __iomem *addr, u8 index, u8 data) +{ + u32 tmp = index; + + iowrite32((tmp<<17) | IIC_WRITE | data, addr + IIC_CSR2); + mmiowb(); +} + +/** + * wait_i2c_reg - waits the read/write to finish + * + * @addr: dt3155 mmio base address + * + * returns: zero on success or error code + * + * This function waits reading/writting to finish. + */ +static int wait_i2c_reg(void __iomem *addr) +{ + if (ioread32(addr + IIC_CSR2) & NEW_CYCLE) + udelay(65); /* wait at least 63 usec for NEW_CYCLE to clear */ + if (ioread32(addr + IIC_CSR2) & NEW_CYCLE) { + /* error: NEW_CYCLE not cleared */ + printk(KERN_ERR "dt3155: NEW_CYCLE not cleared\n"); + return -EIO; + } + if (ioread32(addr + IIC_CSR1) & DIRECT_ABORT) { + /* error: DIRECT_ABORT set */ + printk(KERN_ERR "dt3155: DIRECT_ABORT set\n"); + /* reset DIRECT_ABORT bit */ + iowrite32(DIRECT_ABORT, addr + IIC_CSR1); + return -EIO; + } + return 0; +} + +static int +dt3155_start_acq(struct dt3155_priv *pd) +{ + struct videobuf_buffer *vb = pd->curr_buf; + dma_addr_t dma_addr; + + dma_addr = videobuf_to_dma_contig(vb); + iowrite32(dma_addr, pd->regs + EVEN_DMA_START); + iowrite32(dma_addr + vb->width, pd->regs + ODD_DMA_START); + iowrite32(vb->width, pd->regs + EVEN_DMA_STRIDE); + iowrite32(vb->width, pd->regs + ODD_DMA_STRIDE); + /* enable interrupts, clear all irq flags */ + iowrite32(FLD_START_EN | FLD_END_ODD_EN | FLD_START | + FLD_END_EVEN | FLD_END_ODD, pd->regs + INT_CSR); + iowrite32(FIFO_EN | SRST | FLD_CRPT_ODD | FLD_CRPT_EVEN | + FLD_DN_ODD | FLD_DN_EVEN | CAP_CONT_EVEN | CAP_CONT_ODD, + pd->regs + CSR1); + wait_i2c_reg(pd->regs); + write_i2c_reg(pd->regs, CONFIG, pd->config); + write_i2c_reg(pd->regs, EVEN_CSR, CSR_ERROR | CSR_DONE); + write_i2c_reg(pd->regs, ODD_CSR, CSR_ERROR | CSR_DONE); + + /* start the board */ + write_i2c_reg(pd->regs, CSR2, pd->csr2 | BUSY_EVEN | BUSY_ODD); + return 0; /* success */ +} + +static int +dt3155_stop_acq(struct dt3155_priv *pd) +{ + int tmp; + + /* stop the board */ + wait_i2c_reg(pd->regs); + write_i2c_reg(pd->regs, CSR2, pd->csr2); + + /* disable all irqs, clear all irq flags */ + iowrite32(FLD_START | FLD_END_EVEN | FLD_END_ODD, pd->regs + INT_CSR); + write_i2c_reg(pd->regs, EVEN_CSR, CSR_ERROR | CSR_DONE); + write_i2c_reg(pd->regs, ODD_CSR, CSR_ERROR | CSR_DONE); + tmp = ioread32(pd->regs + CSR1) & (FLD_CRPT_EVEN | FLD_CRPT_ODD); + if (tmp) + printk(KERN_ERR "dt3155: corrupted field %u\n", tmp); + iowrite32(FIFO_EN | SRST | FLD_CRPT_ODD | FLD_CRPT_EVEN | + FLD_DN_ODD | FLD_DN_EVEN | CAP_CONT_EVEN | CAP_CONT_ODD, + pd->regs + CSR1); + return 0; +} + +/* Locking: Caller holds q->vb_lock */ +static int +dt3155_buf_setup(struct videobuf_queue *q, unsigned int *count, + unsigned int *size) +{ + *size = img_width * img_height; + return 0; +} + +/* Locking: Caller holds q->vb_lock */ +static int +dt3155_buf_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb, + enum v4l2_field field) +{ + int ret = 0; + + vb->width = img_width; + vb->height = img_height; + vb->size = img_width * img_height; + vb->field = field; + if (vb->state == VIDEOBUF_NEEDS_INIT) + ret = videobuf_iolock(q, vb, NULL); + if (ret) { + vb->state = VIDEOBUF_ERROR; + printk(KERN_ERR "ERROR: videobuf_iolock() failed\n"); + videobuf_dma_contig_free(q, vb); /* FIXME: needed? */ + } else + vb->state = VIDEOBUF_PREPARED; + return ret; +} + +/* Locking: Caller holds q->vb_lock & q->irqlock */ +static void +dt3155_buf_queue(struct videobuf_queue *q, struct videobuf_buffer *vb) +{ + struct dt3155_priv *pd = q->priv_data; + + if (vb->state != VIDEOBUF_NEEDS_INIT) { + vb->state = VIDEOBUF_QUEUED; + list_add_tail(&vb->queue, &pd->dmaq); + wake_up_interruptible_sync(&pd->do_dma); + } else + vb->state = VIDEOBUF_ERROR; +} + +/* Locking: Caller holds q->vb_lock */ +static void +dt3155_buf_release(struct videobuf_queue *q, struct videobuf_buffer *vb) +{ + if (vb->state == VIDEOBUF_ACTIVE) + videobuf_waiton(vb, 0, 0); /* FIXME: cannot be interrupted */ + videobuf_dma_contig_free(q, vb); + vb->state = VIDEOBUF_NEEDS_INIT; +} + +static struct videobuf_queue_ops vbq_ops = { + .buf_setup = dt3155_buf_setup, + .buf_prepare = dt3155_buf_prepare, + .buf_queue = dt3155_buf_queue, + .buf_release = dt3155_buf_release, +}; + +static irqreturn_t +dt3155_irq_handler_even(int irq, void *dev_id) +{ + struct dt3155_priv *ipd = dev_id; + struct videobuf_buffer *ivb; + dma_addr_t dma_addr; + u32 tmp; + + tmp = ioread32(ipd->regs + INT_CSR) & (FLD_START | FLD_END_ODD); + if (!tmp) + return IRQ_NONE; /* not our irq */ + if ((tmp & FLD_START) && !(tmp & FLD_END_ODD)) { + iowrite32(FLD_START_EN | FLD_END_ODD_EN | FLD_START, + ipd->regs + INT_CSR); + ipd->field_count++; + return IRQ_HANDLED; /* start of field irq */ + } + if ((tmp & FLD_START) && (tmp & FLD_END_ODD)) { + if (!ipd->stats.start_before_end++) + printk(KERN_ERR "dt3155: irq: START before END\n"); + } + /* check for corrupted fields */ +/* write_i2c_reg(ipd->regs, EVEN_CSR, CSR_ERROR | CSR_DONE); */ +/* write_i2c_reg(ipd->regs, ODD_CSR, CSR_ERROR | CSR_DONE); */ + tmp = ioread32(ipd->regs + CSR1) & (FLD_CRPT_EVEN | FLD_CRPT_ODD); + if (tmp) { + if (!ipd->stats.corrupted_fields++) + printk(KERN_ERR "dt3155: corrupted field %u\n", tmp); + iowrite32(FIFO_EN | SRST | FLD_CRPT_ODD | FLD_CRPT_EVEN | + FLD_DN_ODD | FLD_DN_EVEN | + CAP_CONT_EVEN | CAP_CONT_ODD, + ipd->regs + CSR1); + mmiowb(); + } + + spin_lock(&ipd->lock); + if (ipd->curr_buf && ipd->curr_buf->state == VIDEOBUF_ACTIVE) { + if (waitqueue_active(&ipd->curr_buf->done)) { + do_gettimeofday(&ipd->curr_buf->ts); + ipd->curr_buf->field_count = ipd->field_count; + ipd->curr_buf->state = VIDEOBUF_DONE; + wake_up(&ipd->curr_buf->done); + } else { + ivb = ipd->curr_buf; + goto load_dma; + } + } else + goto stop_dma; + if (list_empty(&ipd->dmaq)) + goto stop_dma; + ivb = list_first_entry(&ipd->dmaq, typeof(*ivb), queue); + list_del(&ivb->queue); + if (ivb->state == VIDEOBUF_QUEUED) { + ivb->state = VIDEOBUF_ACTIVE; + ipd->curr_buf = ivb; + } else + goto stop_dma; +load_dma: + dma_addr = videobuf_to_dma_contig(ivb); + iowrite32(dma_addr, ipd->regs + EVEN_DMA_START); + iowrite32(dma_addr + ivb->width, ipd->regs + ODD_DMA_START); + iowrite32(ivb->width, ipd->regs + EVEN_DMA_STRIDE); + iowrite32(ivb->width, ipd->regs + ODD_DMA_STRIDE); + mmiowb(); + /* enable interrupts, clear all irq flags */ + iowrite32(FLD_START_EN | FLD_END_ODD_EN | FLD_START | + FLD_END_EVEN | FLD_END_ODD, ipd->regs + INT_CSR); + spin_unlock(&ipd->lock); + return IRQ_HANDLED; + +stop_dma: + ipd->curr_buf = NULL; + /* stop the board */ + write_i2c_reg_nowait(ipd->regs, CSR2, ipd->csr2); + /* disable interrupts, clear all irq flags */ + iowrite32(FLD_START | FLD_END_EVEN | FLD_END_ODD, ipd->regs + INT_CSR); + spin_unlock(&ipd->lock); + return IRQ_HANDLED; +} + +static int +dt3155_threadfn(void *arg) +{ + struct dt3155_priv *pd = arg; + struct videobuf_buffer *vb; + unsigned long flags; + + while (1) { + wait_event_interruptible(pd->do_dma, + kthread_should_stop() || !list_empty(&pd->dmaq)); + if (kthread_should_stop()) + break; + + spin_lock_irqsave(&pd->lock, flags); + if (pd->curr_buf) /* dma is active */ + goto done; + if (list_empty(&pd->dmaq)) /* no empty biffers */ + goto done; + vb = list_first_entry(&pd->dmaq, typeof(*vb), queue); + list_del(&vb->queue); + if (vb->state == VIDEOBUF_QUEUED) { + vb->state = VIDEOBUF_ACTIVE; + pd->curr_buf = vb; + spin_unlock_irqrestore(&pd->lock, flags); + /* start dma */ + dt3155_start_acq(pd); + continue; + } else + printk(KERN_DEBUG "%s(): This is a BUG\n", __func__); +done: + spin_unlock_irqrestore(&pd->lock, flags); + } + return 0; +} + +static int +dt3155_open(struct file *filp) +{ + int ret = 0; + struct dt3155_priv *pd = video_drvdata(filp); + + printk(KERN_INFO "dt3155: open(): minor: %i\n", pd->vdev->minor); + + if (mutex_lock_interruptible(&pd->mux) == -EINTR) + return -ERESTARTSYS; + if (!pd->users) { + pd->vidq = kzalloc(sizeof(*pd->vidq), GFP_KERNEL); + if (!pd->vidq) { + printk(KERN_ERR "dt3155: error: alloc queue\n"); + ret = -ENOMEM; + goto err_alloc_queue; + } + videobuf_queue_dma_contig_init(pd->vidq, &vbq_ops, + &pd->pdev->dev, &pd->lock, + V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_NONE, + sizeof(struct videobuf_buffer), pd); + /* disable all irqs, clear all irq flags */ + iowrite32(FLD_START | FLD_END_EVEN | FLD_END_ODD, + pd->regs + INT_CSR); + pd->irq_handler = dt3155_irq_handler_even; + ret = request_irq(pd->pdev->irq, pd->irq_handler, + IRQF_SHARED, DT3155_NAME, pd); + if (ret) { + printk(KERN_ERR "dt3155: error: request_irq\n"); + goto err_request_irq; + } + pd->curr_buf = NULL; + pd->thread = kthread_run(dt3155_threadfn, pd, + "dt3155_thread_%i", pd->vdev->minor); + if (IS_ERR(pd->thread)) { + printk(KERN_ERR "dt3155: kthread_run() failed\n"); + ret = PTR_ERR(pd->thread); + goto err_thread; + } + pd->field_count = 0; + } + pd->users++; + goto done; +err_thread: + free_irq(pd->pdev->irq, pd); +err_request_irq: + kfree(pd->vidq); + pd->vidq = NULL; +err_alloc_queue: +done: + mutex_unlock(&pd->mux); + return ret; +} + +static int +dt3155_release(struct file *filp) +{ + struct dt3155_priv *pd = video_drvdata(filp); + struct videobuf_buffer *tmp; + unsigned long flags; + int ret = 0; + + printk(KERN_INFO "dt3155: release(): minor: %i\n", pd->vdev->minor); + + if (mutex_lock_interruptible(&pd->mux) == -EINTR) + return -ERESTARTSYS; + pd->users--; + BUG_ON(pd->users < 0); + if (pd->acq_fp == filp) { + spin_lock_irqsave(&pd->lock, flags); + INIT_LIST_HEAD(&pd->dmaq); /* queue is emptied */ + tmp = pd->curr_buf; + spin_unlock_irqrestore(&pd->lock, flags); + if (tmp) + videobuf_waiton(tmp, 0, 1); /* block, interruptible */ + dt3155_stop_acq(pd); + videobuf_stop(pd->vidq); + pd->acq_fp = NULL; + pd->streaming = 0; + } + if (!pd->users) { + kthread_stop(pd->thread); + free_irq(pd->pdev->irq, pd); + kfree(pd->vidq); + pd->vidq = NULL; + } + mutex_unlock(&pd->mux); + return ret; +} + +static ssize_t +dt3155_read(struct file *filp, char __user *user, size_t size, loff_t *loff) +{ + struct dt3155_priv *pd = video_drvdata(filp); + int ret; + + if (mutex_lock_interruptible(&pd->mux) == -EINTR) + return -ERESTARTSYS; + if (!pd->acq_fp) { + pd->acq_fp = filp; + pd->streaming = 0; + } else if (pd->acq_fp != filp) { + ret = -EBUSY; + goto done; + } else if (pd->streaming == 1) { + ret = -EINVAL; + goto done; + } + ret = videobuf_read_stream(pd->vidq, user, size, loff, 0, + filp->f_flags & O_NONBLOCK); +done: + mutex_unlock(&pd->mux); + return ret; +} + +static unsigned int +dt3155_poll(struct file *filp, struct poll_table_struct *polltbl) +{ + struct dt3155_priv *pd = video_drvdata(filp); + + return videobuf_poll_stream(filp, pd->vidq, polltbl); +} + +static int +dt3155_mmap(struct file *filp, struct vm_area_struct *vma) +{ + struct dt3155_priv *pd = video_drvdata(filp); + + return videobuf_mmap_mapper(pd->vidq, vma); +} + +static const struct v4l2_file_operations dt3155_fops = { + .owner = THIS_MODULE, + .open = dt3155_open, + .release = dt3155_release, + .read = dt3155_read, + .poll = dt3155_poll, + .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */ + .mmap = dt3155_mmap, +}; + +static int +dt3155_ioc_streamon(struct file *filp, void *p, enum v4l2_buf_type type) +{ + struct dt3155_priv *pd = video_drvdata(filp); + int ret = -ERESTARTSYS; + + if (mutex_lock_interruptible(&pd->mux) == -EINTR) + return ret; + if (!pd->acq_fp) { + ret = videobuf_streamon(pd->vidq); + if (ret) + goto unlock; + pd->acq_fp = filp; + pd->streaming = 1; + wake_up_interruptible_sync(&pd->do_dma); + } else if (pd->acq_fp == filp) { + pd->streaming = 1; + ret = videobuf_streamon(pd->vidq); + if (!ret) + wake_up_interruptible_sync(&pd->do_dma); + } else + ret = -EBUSY; +unlock: + mutex_unlock(&pd->mux); + return ret; +} + +static int +dt3155_ioc_streamoff(struct file *filp, void *p, enum v4l2_buf_type type) +{ + struct dt3155_priv *pd = video_drvdata(filp); + struct videobuf_buffer *tmp; + unsigned long flags; + int ret; + + ret = videobuf_streamoff(pd->vidq); + if (ret) + return ret; + spin_lock_irqsave(&pd->lock, flags); + tmp = pd->curr_buf; + spin_unlock_irqrestore(&pd->lock, flags); + if (tmp) + videobuf_waiton(tmp, 0, 1); /* block, interruptible */ + return ret; +} + +static int +dt3155_ioc_querycap(struct file *filp, void *p, struct v4l2_capability *cap) +{ + struct dt3155_priv *pd = video_drvdata(filp); + + strcpy(cap->driver, DT3155_NAME); + strcpy(cap->card, DT3155_NAME " frame grabber"); + sprintf(cap->bus_info, "PCI:%s", pci_name(pd->pdev)); + cap->version = + KERNEL_VERSION(DT3155_VER_MAJ, DT3155_VER_MIN, DT3155_VER_EXT); + cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | + V4L2_CAP_STREAMING | + V4L2_CAP_READWRITE; + return 0; +} + +static int +dt3155_ioc_enum_fmt_vid_cap(struct file *filp, void *p, struct v4l2_fmtdesc *f) +{ + if (f->index >= NUM_OF_FORMATS) + return -EINVAL; + *f = frame_std[f->index]; + return 0; +} + +static int +dt3155_ioc_g_fmt_vid_cap(struct file *filp, void *p, struct v4l2_format *f) +{ + if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + f->fmt.pix.width = img_width; + f->fmt.pix.height = img_height; + f->fmt.pix.pixelformat = V4L2_PIX_FMT_GREY; + f->fmt.pix.field = V4L2_FIELD_NONE; + f->fmt.pix.bytesperline = f->fmt.pix.width; + f->fmt.pix.sizeimage = f->fmt.pix.width * f->fmt.pix.height; + f->fmt.pix.colorspace = 0; + f->fmt.pix.priv = 0; + return 0; +} + +static int +dt3155_ioc_try_fmt_vid_cap(struct file *filp, void *p, struct v4l2_format *f) +{ + if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + if (f->fmt.pix.width == img_width && + f->fmt.pix.height == img_height && + f->fmt.pix.pixelformat == V4L2_PIX_FMT_GREY && + f->fmt.pix.field == V4L2_FIELD_NONE && + f->fmt.pix.bytesperline == f->fmt.pix.width && + f->fmt.pix.sizeimage == f->fmt.pix.width * f->fmt.pix.height) + return 0; + else + return -EINVAL; +} + +static int +dt3155_ioc_s_fmt_vid_cap(struct file *filp, void *p, struct v4l2_format *f) +{ + struct dt3155_priv *pd = video_drvdata(filp); + int ret = -ERESTARTSYS; + + if (mutex_lock_interruptible(&pd->mux) == -EINTR) + return ret; + if (!pd->acq_fp) { + pd->acq_fp = filp; + pd->streaming = 0; + } else if (pd->acq_fp != filp) { + ret = -EBUSY; + goto done; + } +/* FIXME: we don't change the format for now + if (pd->vidq->streaming || pd->vidq->reading || pd->curr_buff) { + ret = -EBUSY; + goto done; + } +*/ + ret = dt3155_ioc_g_fmt_vid_cap(filp, p, f); +done: + mutex_unlock(&pd->mux); + return ret; +} + +static int +dt3155_ioc_reqbufs(struct file *filp, void *p, struct v4l2_requestbuffers *b) +{ + struct dt3155_priv *pd = video_drvdata(filp); + struct videobuf_queue *q = pd->vidq; + int ret = -ERESTARTSYS; + + if (b->memory != V4L2_MEMORY_MMAP) + return -EINVAL; + if (mutex_lock_interruptible(&pd->mux) == -EINTR) + return ret; + if (!pd->acq_fp) + pd->acq_fp = filp; + else if (pd->acq_fp != filp) { + ret = -EBUSY; + goto done; + } + pd->streaming = 1; + ret = 0; +done: + mutex_unlock(&pd->mux); + if (ret) + return ret; + if (b->count) + ret = videobuf_reqbufs(q, b); + else { /* FIXME: is it necessary? */ + printk(KERN_DEBUG "dt3155: request to free buffers\n"); + /* ret = videobuf_mmap_free(q); */ + ret = dt3155_ioc_streamoff(filp, p, + V4L2_BUF_TYPE_VIDEO_CAPTURE); + } + return ret; +} + +static int +dt3155_ioc_querybuf(struct file *filp, void *p, struct v4l2_buffer *b) +{ + struct dt3155_priv *pd = video_drvdata(filp); + struct videobuf_queue *q = pd->vidq; + + return videobuf_querybuf(q, b); +} + +static int +dt3155_ioc_qbuf(struct file *filp, void *p, struct v4l2_buffer *b) +{ + struct dt3155_priv *pd = video_drvdata(filp); + struct videobuf_queue *q = pd->vidq; + int ret; + + ret = videobuf_qbuf(q, b); + if (ret) + return ret; + return videobuf_querybuf(q, b); +} + +static int +dt3155_ioc_dqbuf(struct file *filp, void *p, struct v4l2_buffer *b) +{ + struct dt3155_priv *pd = video_drvdata(filp); + struct videobuf_queue *q = pd->vidq; + + return videobuf_dqbuf(q, b, filp->f_flags & O_NONBLOCK); +} + +static int +dt3155_ioc_querystd(struct file *filp, void *p, v4l2_std_id *norm) +{ + *norm = DT3155_CURRENT_NORM; + return 0; +} + +static int +dt3155_ioc_g_std(struct file *filp, void *p, v4l2_std_id *norm) +{ + *norm = DT3155_CURRENT_NORM; + return 0; +} + +static int +dt3155_ioc_s_std(struct file *filp, void *p, v4l2_std_id *norm) +{ + if (*norm & DT3155_CURRENT_NORM) + return 0; + return -EINVAL; +} + +static int +dt3155_ioc_enum_input(struct file *filp, void *p, struct v4l2_input *input) +{ + if (input->index) + return -EINVAL; + strcpy(input->name, "Coax in"); + input->type = V4L2_INPUT_TYPE_CAMERA; + /* + * FIXME: input->std = 0 according to v4l2 API + * VIDIOC_G_STD, VIDIOC_S_STD, VIDIOC_QUERYSTD and VIDIOC_ENUMSTD + * should return -EINVAL + */ + input->std = DT3155_CURRENT_NORM; + input->status = 0;/* FIXME: add sync detection & V4L2_IN_ST_NO_H_LOCK */ + return 0; +} + +static int +dt3155_ioc_g_input(struct file *filp, void *p, unsigned int *i) +{ + *i = 0; + return 0; +} + +static int +dt3155_ioc_s_input(struct file *filp, void *p, unsigned int i) +{ + if (i) + return -EINVAL; + return 0; +} + +static int +dt3155_ioc_g_parm(struct file *filp, void *p, struct v4l2_streamparm *parms) +{ + if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + parms->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; + parms->parm.capture.capturemode = 0; + parms->parm.capture.timeperframe.numerator = 1001; + parms->parm.capture.timeperframe.denominator = frames_per_sec * 1000; + parms->parm.capture.extendedmode = 0; + parms->parm.capture.readbuffers = 1; /* FIXME: 2 buffers? */ + return 0; +} + +static int +dt3155_ioc_s_parm(struct file *filp, void *p, struct v4l2_streamparm *parms) +{ + if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + parms->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; + parms->parm.capture.capturemode = 0; + parms->parm.capture.timeperframe.numerator = 1001; + parms->parm.capture.timeperframe.denominator = frames_per_sec * 1000; + parms->parm.capture.extendedmode = 0; + parms->parm.capture.readbuffers = 1; /* FIXME: 2 buffers? */ + return 0; +} + +static const struct v4l2_ioctl_ops dt3155_ioctl_ops = { + .vidioc_streamon = dt3155_ioc_streamon, + .vidioc_streamoff = dt3155_ioc_streamoff, + .vidioc_querycap = dt3155_ioc_querycap, +/* + .vidioc_g_priority = dt3155_ioc_g_priority, + .vidioc_s_priority = dt3155_ioc_s_priority, +*/ + .vidioc_enum_fmt_vid_cap = dt3155_ioc_enum_fmt_vid_cap, + .vidioc_try_fmt_vid_cap = dt3155_ioc_try_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = dt3155_ioc_g_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = dt3155_ioc_s_fmt_vid_cap, + .vidioc_reqbufs = dt3155_ioc_reqbufs, + .vidioc_querybuf = dt3155_ioc_querybuf, + .vidioc_qbuf = dt3155_ioc_qbuf, + .vidioc_dqbuf = dt3155_ioc_dqbuf, + .vidioc_querystd = dt3155_ioc_querystd, + .vidioc_g_std = dt3155_ioc_g_std, + .vidioc_s_std = dt3155_ioc_s_std, + .vidioc_enum_input = dt3155_ioc_enum_input, + .vidioc_g_input = dt3155_ioc_g_input, + .vidioc_s_input = dt3155_ioc_s_input, +/* + .vidioc_queryctrl = dt3155_ioc_queryctrl, + .vidioc_g_ctrl = dt3155_ioc_g_ctrl, + .vidioc_s_ctrl = dt3155_ioc_s_ctrl, + .vidioc_querymenu = dt3155_ioc_querymenu, + .vidioc_g_ext_ctrls = dt3155_ioc_g_ext_ctrls, + .vidioc_s_ext_ctrls = dt3155_ioc_s_ext_ctrls, +*/ + .vidioc_g_parm = dt3155_ioc_g_parm, + .vidioc_s_parm = dt3155_ioc_s_parm, +/* + .vidioc_cropcap = dt3155_ioc_cropcap, + .vidioc_g_crop = dt3155_ioc_g_crop, + .vidioc_s_crop = dt3155_ioc_s_crop, + .vidioc_enum_framesizes = dt3155_ioc_enum_framesizes, + .vidioc_enum_frameintervals = dt3155_ioc_enum_frameintervals, +#ifdef CONFIG_VIDEO_V4L1_COMPAT + .vidiocgmbuf = iocgmbuf, +#endif +*/ +}; + +static int __devinit +dt3155_init_board(struct pci_dev *dev) +{ + struct dt3155_priv *pd = pci_get_drvdata(dev); + void *buf_cpu; + dma_addr_t buf_dma; + int i; + u8 tmp; + + pci_set_master(dev); /* dt3155 needs it */ + + /* resetting the adapter */ + iowrite32(FLD_CRPT_ODD | FLD_CRPT_EVEN | FLD_DN_ODD | FLD_DN_EVEN, + pd->regs + CSR1); + mmiowb(); + msleep(10); + + /* initializing adaper registers */ + iowrite32(FIFO_EN | SRST, pd->regs + CSR1); + mmiowb(); + iowrite32(0xEEEEEE01, pd->regs + EVEN_PIXEL_FMT); + iowrite32(0xEEEEEE01, pd->regs + ODD_PIXEL_FMT); + iowrite32(0x00000020, pd->regs + FIFO_TRIGER); + iowrite32(0x00000103, pd->regs + XFER_MODE); + iowrite32(0, pd->regs + RETRY_WAIT_CNT); + iowrite32(0, pd->regs + INT_CSR); + iowrite32(1, pd->regs + EVEN_FLD_MASK); + iowrite32(1, pd->regs + ODD_FLD_MASK); + iowrite32(0, pd->regs + MASK_LENGTH); + iowrite32(0x0005007C, pd->regs + FIFO_FLAG_CNT); + iowrite32(0x01010101, pd->regs + IIC_CLK_DUR); + mmiowb(); + + /* verifying that we have a DT3155 board (not just a SAA7116 chip) */ + read_i2c_reg(pd->regs, DT_ID, &tmp); + if (tmp != DT3155_ID) + return -ENODEV; + + /* initialize AD LUT */ + write_i2c_reg(pd->regs, AD_ADDR, 0); + for (i = 0; i < 256; i++) + write_i2c_reg(pd->regs, AD_LUT, i); + + /* initialize ADC references */ + /* FIXME: pos_ref & neg_ref depend on VT_50HZ */ + write_i2c_reg(pd->regs, AD_ADDR, AD_CMD_REG); + write_i2c_reg(pd->regs, AD_CMD, VIDEO_CNL_1 | SYNC_CNL_1 | SYNC_LVL_3); + write_i2c_reg(pd->regs, AD_ADDR, AD_POS_REF); + write_i2c_reg(pd->regs, AD_CMD, 34); + write_i2c_reg(pd->regs, AD_ADDR, AD_NEG_REF); + write_i2c_reg(pd->regs, AD_CMD, 0); + + /* initialize PM LUT */ + write_i2c_reg(pd->regs, CONFIG, pd->config | PM_LUT_PGM); + for (i = 0; i < 256; i++) { + write_i2c_reg(pd->regs, PM_LUT_ADDR, i); + write_i2c_reg(pd->regs, PM_LUT_DATA, i); + } + write_i2c_reg(pd->regs, CONFIG, pd->config | PM_LUT_PGM | PM_LUT_SEL); + for (i = 0; i < 256; i++) { + write_i2c_reg(pd->regs, PM_LUT_ADDR, i); + write_i2c_reg(pd->regs, PM_LUT_DATA, i); + } + write_i2c_reg(pd->regs, CONFIG, pd->config); /* ACQ_MODE_EVEN */ + + /* select chanel 1 for input and set sync level */ + write_i2c_reg(pd->regs, AD_ADDR, AD_CMD_REG); + write_i2c_reg(pd->regs, AD_CMD, VIDEO_CNL_1 | SYNC_CNL_1 | SYNC_LVL_3); + + /* allocate memory, and initialize the DMA machine */ + buf_cpu = dma_alloc_coherent(&dev->dev, DT3155_BUF_SIZE, &buf_dma, + GFP_KERNEL); + if (!buf_cpu) { + printk(KERN_ERR "dt3155: dma_alloc_coherent " + "(in dt3155_init_board) failed\n"); + return -ENOMEM; + } + iowrite32(buf_dma, pd->regs + EVEN_DMA_START); + iowrite32(buf_dma, pd->regs + ODD_DMA_START); + iowrite32(0, pd->regs + EVEN_DMA_STRIDE); + iowrite32(0, pd->regs + ODD_DMA_STRIDE); + + /* Perform a pseudo even field acquire */ + iowrite32(FIFO_EN | SRST | CAP_CONT_ODD, pd->regs + CSR1); + write_i2c_reg(pd->regs, CSR2, pd->csr2 | SYNC_SNTL); + write_i2c_reg(pd->regs, CONFIG, pd->config); + write_i2c_reg(pd->regs, EVEN_CSR, CSR_SNGL); + write_i2c_reg(pd->regs, CSR2, pd->csr2 | BUSY_EVEN | SYNC_SNTL); + msleep(100); + read_i2c_reg(pd->regs, CSR2, &tmp); + write_i2c_reg(pd->regs, EVEN_CSR, CSR_ERROR | CSR_SNGL | CSR_DONE); + write_i2c_reg(pd->regs, ODD_CSR, CSR_ERROR | CSR_SNGL | CSR_DONE); + write_i2c_reg(pd->regs, CSR2, pd->csr2); + iowrite32(FIFO_EN | SRST | FLD_DN_EVEN | FLD_DN_ODD, pd->regs + CSR1); + + /* deallocate memory */ + dma_free_coherent(&dev->dev, DT3155_BUF_SIZE, buf_cpu, buf_dma); + if (tmp & BUSY_EVEN) { + printk(KERN_ERR "dt3155: BUSY_EVEN not cleared\n"); + return -EIO; + } + return 0; +} + +static struct video_device dt3155_vdev = { + .name = DT3155_NAME, + .fops = &dt3155_fops, + .ioctl_ops = &dt3155_ioctl_ops, + .minor = -1, + .release = video_device_release, + .tvnorms = DT3155_CURRENT_NORM, + .current_norm = DT3155_CURRENT_NORM, +}; + +/* same as in drivers/base/dma-coherent.c */ +struct dma_coherent_mem { + void *virt_base; + u32 device_base; + int size; + int flags; + unsigned long *bitmap; +}; + +static int __devinit +dt3155_alloc_coherent(struct device *dev, size_t size, int flags) +{ + int pages = size >> PAGE_SHIFT; + int bitmap_size = BITS_TO_LONGS(pages) * sizeof(long); + + if ((flags & DMA_MEMORY_MAP) == 0) + goto out; + if (!size) + goto out; + if (dev->dma_mem) + goto out; + + dev->dma_mem = kzalloc(sizeof(struct dma_coherent_mem), GFP_KERNEL); + if (!dev->dma_mem) + goto out; + dev->dma_mem->bitmap = kzalloc(bitmap_size, GFP_KERNEL); + if (!dev->dma_mem->bitmap) + goto err_bitmap; + + dev->dma_mem->virt_base = dma_alloc_coherent(dev, size, + &dev->dma_mem->device_base, DT3155_COH_FLAGS); + if (!dev->dma_mem->virt_base) + goto err_coherent; + dev->dma_mem->size = pages; + dev->dma_mem->flags = flags; + return DMA_MEMORY_MAP; + +err_coherent: + kfree(dev->dma_mem->bitmap); +err_bitmap: + kfree(dev->dma_mem); +out: + return 0; +} + +static void __devexit +dt3155_free_coherent(struct device *dev) +{ + struct dma_coherent_mem *mem = dev->dma_mem; + + if (!mem) + return; + dev->dma_mem = NULL; + dma_free_coherent(dev, mem->size << PAGE_SHIFT, + mem->virt_base, mem->device_base); + kfree(mem->bitmap); + kfree(mem); +} + +static int __devinit +dt3155_probe(struct pci_dev *dev, const struct pci_device_id *id) +{ + int err; + struct dt3155_priv *pd; + + printk(KERN_INFO "dt3155: probe()\n"); + err = dma_set_mask(&dev->dev, DMA_BIT_MASK(32)); + if (err) { + printk(KERN_ERR "dt3155: cannot set dma_mask\n"); + return -ENODEV; + } + err = dma_set_coherent_mask(&dev->dev, DMA_BIT_MASK(32)); + if (err) { + printk(KERN_ERR "dt3155: cannot set dma_coherent_mask\n"); + return -ENODEV; + } + pd = kzalloc(sizeof(*pd), GFP_KERNEL); + if (!pd) { + printk(KERN_ERR "dt3155: cannot allocate dt3155_priv\n"); + return -ENOMEM; + } + pd->vdev = video_device_alloc(); + if (!pd->vdev) { + printk(KERN_ERR "dt3155: cannot allocate vdev structure\n"); + goto err_video_device_alloc; + } + *pd->vdev = dt3155_vdev; + pci_set_drvdata(dev, pd); /* for use in dt3155_remove() */ + video_set_drvdata(pd->vdev, pd); /* for use in video_fops */ + pd->users = 0; + pd->acq_fp = NULL; + pd->pdev = dev; + INIT_LIST_HEAD(&pd->dmaq); + init_waitqueue_head(&pd->do_dma); + mutex_init(&pd->mux); + pd->csr2 = csr2_init; + pd->config = config_init; + err = pci_enable_device(pd->pdev); + if (err) { + printk(KERN_ERR "dt3155: pci_dev not enabled\n"); + goto err_enable_dev; + } + err = pci_request_region(pd->pdev, 0, pci_name(pd->pdev)); + if (err) + goto err_req_region; + pd->regs = pci_iomap(pd->pdev, 0, pci_resource_len(pd->pdev, 0)); + if (!pd->regs) { + err = -ENOMEM; + printk(KERN_ERR "dt3155: pci_iomap failed\n"); + goto err_pci_iomap; + } + err = dt3155_init_board(pd->pdev); + if (err) { + printk(KERN_ERR "dt3155: dt3155_init_board failed\n"); + goto err_init_board; + } + err = video_register_device(pd->vdev, VFL_TYPE_GRABBER, -1); + if (err) { + printk(KERN_ERR "dt3155: Cannot register video device\n"); + goto err_init_board; + } + err = dt3155_alloc_coherent(&dev->dev, DT3155_CHUNK_SIZE, + DMA_MEMORY_MAP); + if (err) + printk(KERN_INFO "dt3155: preallocated 8 buffers\n"); + printk(KERN_INFO "dt3155: /dev/video%i is ready\n", pd->vdev->minor); + return 0; /* success */ + +err_init_board: + pci_iounmap(pd->pdev, pd->regs); +err_pci_iomap: + pci_release_region(pd->pdev, 0); +err_req_region: + pci_disable_device(pd->pdev); +err_enable_dev: + video_device_release(pd->vdev); +err_video_device_alloc: + kfree(pd); + return err; +} + +static void __devexit +dt3155_remove(struct pci_dev *dev) +{ + struct dt3155_priv *pd = pci_get_drvdata(dev); + + printk(KERN_INFO "dt3155: remove()\n"); + dt3155_free_coherent(&dev->dev); + video_unregister_device(pd->vdev); + pci_iounmap(dev, pd->regs); + pci_release_region(pd->pdev, 0); + pci_disable_device(pd->pdev); + /* + * video_device_release() is invoked automatically + * see: struct video_device dt3155_vdev + */ + kfree(pd); +} + +static DEFINE_PCI_DEVICE_TABLE(pci_ids) = { + { PCI_DEVICE(DT3155_VENDOR_ID, DT3155_DEVICE_ID) }, + { 0, /* zero marks the end */ }, +}; +MODULE_DEVICE_TABLE(pci, pci_ids); + +static struct pci_driver pci_driver = { + .name = DT3155_NAME, + .id_table = pci_ids, + .probe = dt3155_probe, + .remove = __devexit_p(dt3155_remove), +}; + +static int __init +dt3155_init_module(void) +{ + int err; + + printk(KERN_INFO "dt3155: ==================\n"); + printk(KERN_INFO "dt3155: init()\n"); + err = pci_register_driver(&pci_driver); + if (err) { + printk(KERN_ERR "dt3155: cannot register pci_driver\n"); + return err; + } + return 0; /* succes */ +} + +static void __exit +dt3155_exit_module(void) +{ + pci_unregister_driver(&pci_driver); + printk(KERN_INFO "dt3155: exit()\n"); + printk(KERN_INFO "dt3155: ==================\n"); +} + +module_init(dt3155_init_module); +module_exit(dt3155_exit_module); + +MODULE_DESCRIPTION("video4linux pci-driver for dt3155 frame grabber"); +MODULE_AUTHOR("Marin Mitov <mitov@issp.bas.bg>"); +MODULE_VERSION(DT3155_VERSION); +MODULE_LICENSE("GPL"); |