* [RFC] Yet another (third) dt3155 driver PCI/video4linux compliant @ 2010-03-20 9:18 Marin Mitov 2010-03-20 13:01 ` Greg KH 0 siblings, 1 reply; 7+ messages in thread From: Marin Mitov @ 2010-03-20 9:18 UTC (permalink / raw) To: Scott Smedley; +Cc: Greg Kroah-Hartman, linux-kernel Hi Scott, Greg, all, Here you will find a link to the source code for a dt3155 driver rewritten to be PCI/video4linux compliant. http://lfb.issp.bas.bg/~mitov/linux/dt3155v4l/ It works with xawtv (if the window is bigger than the acquired image). See http://lfb.issp.bas.bg/~mitov/linux/dt3155v4l/00README for more details. Any critics/comments will be appreciated. Regards. Marin Mitov ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [RFC] Yet another (third) dt3155 driver PCI/video4linux compliant 2010-03-20 9:18 [RFC] Yet another (third) dt3155 driver PCI/video4linux compliant Marin Mitov @ 2010-03-20 13:01 ` Greg KH 2010-03-20 19:40 ` Marin Mitov 0 siblings, 1 reply; 7+ messages in thread From: Greg KH @ 2010-03-20 13:01 UTC (permalink / raw) To: Marin Mitov; +Cc: Scott Smedley, linux-kernel On Sat, Mar 20, 2010 at 11:18:36AM +0200, Marin Mitov wrote: > Hi Scott, Greg, all, > > Here you will find a link to the source code for a dt3155 driver > rewritten to be PCI/video4linux compliant. > > http://lfb.issp.bas.bg/~mitov/linux/dt3155v4l/ > > It works with xawtv (if the window is bigger than the acquired image). > See > > http://lfb.issp.bas.bg/~mitov/linux/dt3155v4l/00README > > for more details. > > Any critics/comments will be appreciated. Can you send it in patch form? I can't really do anything with it like this, sorry. greg k-h ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [RFC] Yet another (third) dt3155 driver PCI/video4linux compliant 2010-03-20 13:01 ` Greg KH @ 2010-03-20 19:40 ` Marin Mitov 2010-04-27 23:18 ` Greg KH 0 siblings, 1 reply; 7+ messages in thread From: Marin Mitov @ 2010-03-20 19:40 UTC (permalink / raw) To: Greg KH; +Cc: Scott Smedley, linux-kernel On 20.3.2010, Greg KH wrote: > On Sat, Mar 20, 2010 at 11:18:36AM +0200, Marin Mitov wrote: > > Hi Scott, Greg, all, > > > > Here you will find a link to the source code for a dt3155 driver > > rewritten to be PCI/video4linux compliant. > > > > http://lfb.issp.bas.bg/~mitov/linux/dt3155v4l/ > > > > It works with xawtv (if the window is bigger than the acquired image). > > See > > > > http://lfb.issp.bas.bg/~mitov/linux/dt3155v4l/00README > > > > for more details. > > > > Any critics/comments will be appreciated. > > Can you send it in patch form? I can't really do anything with it like > this, sorry. > > greg k-h OK, here it is: ====================================================== Kernel module (device driver) for dt3155 frame grabber video4linux2 compliant (finaly). Works with xawtv. ====================================================== This driver is written (almost) from scratch, usung the allocator developed for dt3155pci see bellow). The driver uses videobuf-dma-contig interface modified to use the above mentioned allocator instead of dma_alloc_coheren(). The first thing to do was to design a new allocator based on allocating a configurable number of 4MB chunks of memory, that latter are broken into frame buffers of 768x576 bytes kept in different FIFOs (queues). As far as the driver autoloads as a kernel module during kernel boot, the allocation of 4MB chunks succeeds. The driver keeps three FIFOs: one for 4MB chunks, one for free buffers (available for allocations) and one for buffers already allocated. Allocation/deallocation is done automatically though the video4linux videobuf subsystem (some pointers to functions are replaced by driver supplied functions). Sure, there are problems: 1. The device works by read() method only (for now). 2. Works for CCIR, but should work for RS-170 (not tested) This is made during kernel configuration. 3. Could work for multiple dt3155 frame grabbers in a PC, (private data is allocated during PCI probe() method), but is not tested due to lack of a second board. 4. Not tested on a BIG ENDIAN architecture. 5. Many others you could find .... :-) All critics, comments, suggestions are wellcome. Marin Mitov Signed-off-by: Marin Mitov <mitov@issp.bas.bg> ================================================================================ diff -uN a/drivers/staging/dt3155v4l/Kconfig b/drivers/staging/dt3155v4l/Kconfig --- a/drivers/staging/dt3155v4l/Kconfig 1970-01-01 02:00:00.000000000 +0200 +++ b/drivers/staging/dt3155v4l/Kconfig 2010-03-20 17:59:59.000000000 +0200 @@ -0,0 +1,20 @@ +config VIDEO_DT3155 + tristate "DT3155 frame grabber, Video4Linux interface" + depends on PCI && VIDEO_DEV && VIDEO_V4L2 + select VIDEOBUF_DMA_CONTIG + default n + ---help--- + Enables dt3155 device driver for the DataTranslation DT3155 frame grabber. + Say Y here if you have this hardware. + In doubt, say N. + + To compile this driver as a module, choose M here: the + module will be called dt3155_v4l. + +config DT3155_CCIR + bool "Selects CCIR/50Hz vertical refresh" + depends on VIDEO_DT3155 + default y + ---help--- + Select it for CCIR/50Hz (European region), + or leave it unselected for RS-170/60Hz (North America). diff -uN a/drivers/staging/dt3155v4l/Makefile b/drivers/staging/dt3155v4l/Makefile --- a/drivers/staging/dt3155v4l/Makefile 1970-01-01 02:00:00.000000000 +0200 +++ b/drivers/staging/dt3155v4l/Makefile 2010-03-20 17:34:16.000000000 +0200 @@ -0,0 +1,4 @@ +obj-$(CONFIG_VIDEO_DT3155) += dt3155_v4l.o +dt3155_v4l-objs := \ + dt3155-bufs.o \ + dt3155v4l.o diff -uN a/drivers/staging/dt3155v4l/dt3155-bufs.c b/drivers/staging/dt3155v4l/dt3155-bufs.c --- a/drivers/staging/dt3155v4l/dt3155-bufs.c 1970-01-01 02:00:00.000000000 +0200 +++ b/drivers/staging/dt3155v4l/dt3155-bufs.c 2010-03-20 17:03:19.000000000 +0200 @@ -0,0 +1,256 @@ +/*************************************************************************** + * 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 "dt3155-bufs.h" + +/** + * dt3155_init_chunks_buf - creates a chunk buffer and allocates memory for it + * + * returns: a pointer to the struct dt3155_buf or NULL if failed + * + * Creates a struct dt3155_buf, then allocates a chunk of memory of + * size DT3155_CHUNK_SIZE and sets all the pages in it as Reserved. + * This is done to be able to use remap_pfn_range() on these buffers + * (which do not work on normal memory if Reserved bit is not set) + */ +struct dt3155_buf * +dt3155_init_chunks_buf(void) +{ /* could sleep */ + struct dt3155_buf *buf; + int i; + + buf = kzalloc(sizeof(*buf), GFP_KERNEL); + if (!buf) + return NULL; + buf->cpu = (void *)__get_free_pages(DT3155_CHUNK_FLAGS, + get_order(DT3155_CHUNK_SIZE)); + if (!buf->cpu) { + kfree(buf); + return NULL; + } + for (i = 0; i < DT3155_CHUNK_SIZE; i += PAGE_SIZE) + SetPageReserved(virt_to_page(buf->cpu + i)); + return buf; /* success */ +} + +/** + * dt3155_free_chunks_buf - destroys the specified buffer + * + * @buf: the buffer to be freed + * + * Clears Reserved bit of all pages in the chunk, frees the chunk memory + * and destroys struct dt3155_buf. + */ +void +dt3155_free_chunks_buf(struct dt3155_buf *buf) +{ + int i; + + for (i = 0; i < DT3155_CHUNK_SIZE; i += PAGE_SIZE) + ClearPageReserved(virt_to_page(buf->cpu + i)); + free_pages((unsigned long)buf->cpu, get_order(DT3155_CHUNK_SIZE)); + kfree(buf); +} + +/** + * dt3155_init_fifo - creates and initializes a fifo + * + * returns: a pointer to the crated and initialized struct dt3155_fifo + * or NULL if failed + */ +struct dt3155_fifo * +dt3155_init_fifo(void) +{ /* could sleep */ + struct dt3155_fifo *fifo = kzalloc(sizeof(*fifo), GFP_KERNEL); + if (fifo) + spin_lock_init(&fifo->lock); + return fifo; +} + +/* dt3155_free_fifo(x) defined as macro in dt3155.h */ + +/** + * dt3155_get_buf - gets a buffer from the fifo + * + * @fifo: the fifo to get a buffer from + * + * returns: a pointer to the buffer or NULL if failed + * + * dt3155_get_buf gets the fifo's spin_lock and returns the + * buffer pointed by the head. Could be used in any context. + */ +struct dt3155_buf * +dt3155_get_buf(struct dt3155_fifo *fifo) +{ + unsigned long flags; + struct dt3155_buf *tmp_buf; + + spin_lock_irqsave(&fifo->lock, flags); + tmp_buf = fifo->head; + if (fifo->head) + fifo->head = fifo->head->next; + if (!fifo->head) + fifo->tail = NULL; + spin_unlock_irqrestore(&fifo->lock, flags); + return tmp_buf; +} + +/** + * dt3155_put_buf - puts a buffer into a fifo + * + * @buf: the buffer to put + * @fifo: the fifo to put the buffer in + * + * dt3155_put_buf gets the fifo's spin_lock and puts the buf + * at the tail of the fifo. Could be used in any context. + */ +void +dt3155_put_buf(struct dt3155_buf *buf, struct dt3155_fifo *fifo) +{ + unsigned long flags; + + spin_lock_irqsave(&fifo->lock, flags); + buf->next = NULL; + if (fifo->tail) + fifo->tail->next = buf; + fifo->tail = buf; + if (!fifo->head) + fifo->head = buf; + spin_unlock_irqrestore(&fifo->lock, flags); +} + +/** + * dt3155_init_chunks_fifo - creates and fills a chunks_fifo + * + * returns: a pointer to the fifo or NULL if failed + * + * dt3155_init_chunks_fifo creates and fills the fifo with + * a number of chunks <= DT3155_CHUNK_NUM. The returned fifo + * contains at least one chunk. + */ +struct dt3155_fifo * +dt3155_init_chunks_fifo(void) +{ /* could sleep */ + int i; + + struct dt3155_fifo *chunks; + struct dt3155_buf *tmp_buf; + + chunks = dt3155_init_fifo(); + if (!chunks) + return NULL; + tmp_buf = dt3155_init_chunks_buf(); + if (!tmp_buf) { + dt3155_free_fifo(chunks); + return NULL; + } + dt3155_put_buf(tmp_buf, chunks); + for (i = 1; i < DT3155_CHUNK_NUM; i++) { + tmp_buf = dt3155_init_chunks_buf(); + if (!tmp_buf) + break; + dt3155_put_buf(tmp_buf, chunks); + } + return chunks; +} + +/** + * dt3155_free_chunks_fifo - empties and destroys the chunks_fifo + * + * @chunks: the chunks_fifo to be freed + * + * dt3155_free_chunks_fifo deallocates all chunks in the fifo and + * destroys it. + */ +void +dt3155_free_chunks_fifo(struct dt3155_fifo *chunks) +{ + int buf_count = 0; + struct dt3155_buf *buf; + + while ((buf = dt3155_get_buf(chunks))) { + dt3155_free_chunks_buf(buf); + buf_count++; + } + dt3155_free_fifo(chunks); + printk(KERN_INFO "dt3155: %i chunks freed\n", buf_count); +} + +/** + * dt3155_init_ibufs_fifo - creates and fills an image buffer fifo + * + * @chunks: chunks_fifo to take memory from + * @buf_size: the size of image buffers + * + * returns: a pointer to the fifo filled with image buffers + * + * dt3155_init_ibufs_fifo takes chunks from chunks_fifo, chops them + * into pieces of size buf_size and fills image fifo with them. + */ +struct dt3155_fifo * +dt3155_init_ibufs_fifo(struct dt3155_fifo *chunks, int buf_size) +{ /* could sleep */ + int i, buf_count = 0; + struct dt3155_buf *tmp_ibuf, *chunks_buf, *last_chunk; + struct dt3155_fifo *tmp_fifo; + + tmp_fifo = dt3155_init_fifo(); + if (!tmp_fifo) + return NULL; + last_chunk = chunks->tail; + do { + chunks_buf = dt3155_get_buf(chunks); + dt3155_put_buf(chunks_buf, chunks); + for (i = 0; i < DT3155_CHUNK_SIZE / buf_size; i++) { + tmp_ibuf = kzalloc(sizeof(*tmp_ibuf), GFP_KERNEL); + if (tmp_ibuf) { + tmp_ibuf->cpu = + chunks_buf->cpu + DT3155_BUF_SIZE * i; + dt3155_put_buf(tmp_ibuf, tmp_fifo); + buf_count++; + } else { + if (buf_count) { + goto print_num_bufs; + } else { + dt3155_free_fifo(tmp_fifo); + return NULL; + } + } + } + } while (chunks_buf != last_chunk); +print_num_bufs: + printk(KERN_INFO "dt3155: %i image buffers available\n", buf_count); + return tmp_fifo; +} + +/** + * dt3155_free_ibufs_fifo - empties and destroys an image fifo + * + * @fifo: the fifo to free + */ +void +dt3155_free_ibufs_fifo(struct dt3155_fifo *fifo) +{ + struct dt3155_buf *tmp_ibuf; + + while ((tmp_ibuf = dt3155_get_buf(fifo))) + kfree(tmp_ibuf); + kfree(fifo); +} diff -uN a/drivers/staging/dt3155v4l/dt3155-bufs.h b/drivers/staging/dt3155v4l/dt3155-bufs.h --- a/drivers/staging/dt3155v4l/dt3155-bufs.h 1970-01-01 02:00:00.000000000 +0200 +++ b/drivers/staging/dt3155v4l/dt3155-bufs.h 2010-03-20 19:58:16.000000000 +0200 @@ -0,0 +1,86 @@ +/*************************************************************************** + * 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. * + ***************************************************************************/ + +#ifndef _DT3155_BUFS_H_ +#define _DT3155_BUFS_H_ + +#include <linux/pci.h> + +#define DT3155_CHUNK_NUM 1 +/* DT3155_CHUNK_SIZE should be 4M (2^22) or less, but more than image size */ +#define DT3155_CHUNK_SIZE (1U << 22) +#define DT3155_CHUNK_FLAGS (GFP_KERNEL | GFP_DMA32 | __GFP_COLD | __GFP_NOWARN) + +/* DT3155_BUF_SIZE = 108 * PAGE_SIZE, so each buf is PAGE_SIZE alligned */ +#define DT3155_BUF_SIZE (768 * 576) + +/** + * struct dt3155_buf - image buffer structure + * + * @cpu: virtual kernel address of the buffer + * @dma: dma (bus) address of the buffer + * @next: pointer to the next buffer in the fifo + * @tv: time value when the image has been acquired + */ +struct dt3155_buf { + void *cpu; + dma_addr_t dma; + struct dt3155_buf *next; + struct timeval tv; +}; + +/** + * struct dt3155_fifo - fifo structure + * + * @head: pointer to the head of the fifo + * @tail: pionter to the tail of the fifo + * @lock: spin_lock to protect the fifo + */ +struct dt3155_fifo { + struct dt3155_buf *head; + struct dt3155_buf *tail; + spinlock_t lock; +}; + +struct dt3155_buf * __must_check +dt3155_init_chunks_buf(void); +void +dt3155_free_chunks_buf(struct dt3155_buf *buf); + +struct dt3155_fifo * __must_check +dt3155_init_fifo(void); +#define dt3155_free_fifo(x) kfree(x) + +struct dt3155_buf * __must_check +dt3155_get_buf(struct dt3155_fifo *fifo); +void +dt3155_put_buf(struct dt3155_buf *buf, struct dt3155_fifo *fifo); + +struct dt3155_fifo * __must_check +dt3155_init_chunks_fifo(void); +void +dt3155_free_chunks_fifo(struct dt3155_fifo *chunks); + +struct dt3155_fifo * __must_check +dt3155_init_ibufs_fifo(struct dt3155_fifo *chunks, int buf_size); +void +dt3155_free_ibufs_fifo(struct dt3155_fifo *fifo); + +#endif /* _DT3155_BUFS_H_ */ diff -uN a/drivers/staging/dt3155v4l/dt3155v4l.c b/drivers/staging/dt3155v4l/dt3155v4l.c --- a/drivers/staging/dt3155v4l/dt3155v4l.c 1970-01-01 02:00:00.000000000 +0200 +++ b/drivers/staging/dt3155v4l/dt3155v4l.c 2010-03-20 17:03:33.000000000 +0200 @@ -0,0 +1,1417 @@ +#include <media/v4l2-dev.h> +#include <media/videobuf-core.h> +#include <media/v4l2-ioctl.h> +#include <linux/pci.h> +#include <linux/version.h> +#include <linux/stringify.h> +#include <media/videobuf-dma-contig.h> + +#include "dt3155v4l.h" +#include "dt3155-bufs.h" + +#define DT3155_VENDOR_ID 0x8086 +#define DT3155_DEVICE_ID 0x1223 + +/* 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 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 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) + +#define PR printk + +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 *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 not cleared */ + 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 *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 not cleared */ + 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. + */ +void +write_i2c_reg_nowait(void *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 *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 not cleared */ + printk(KERN_ERR "dt3155: DIRECT_ABORT set\n"); + /* reset DIRECT_ABORT bit */ + iowrite32(DIRECT_ABORT, addr + IIC_CSR1); + return -EIO; + } + return 0; +} + +/* + * global pointers to a list of 4MB chunks reserved at driver + * load, broken down to contiguous buffers of 768 * 576 bytes + * each to form a pool of buffers for allocations + */ +static struct dt3155_fifo *dt3155_chunks; /* list of 4MB chuncks */ +static struct dt3155_fifo *dt3155_free_bufs; /* list of free buffers */ +static struct dt3155_fifo *dt3155_alloc_bufs; /* list of allocated buffers */ + +/* same as in <drivers/media/video/videobuf-dma-contig.c> */ +struct videobuf_dma_contig_memory { + u32 magic; + void *vaddr; + dma_addr_t dma_handle; + unsigned long size; + int is_userptr; +}; + +#define MAGIC_DC_MEM 0x0733ac61 +#define MAGIC_CHECK(is, should) \ + if (unlikely((is) != (should))) { \ + pr_err("magic mismatch: %x expected %x\n", (is), (should)); \ + BUG(); \ + } + +/* helper functions to allocate/free buffers from the pool */ +static void * +dt3155_alloc_buffer(struct device *dev, size_t size, dma_addr_t *dma_handle, + gfp_t flag) +{ + struct dt3155_buf *buf; + + if (size > img_width * img_height) + return NULL; + size = img_width * img_height; + buf = dt3155_get_buf(dt3155_free_bufs); + if (!buf) + return NULL; + buf->dma = dma_map_single(dev, buf->cpu, size, DMA_FROM_DEVICE); + if (dma_mapping_error(dev, buf->dma)) { + dt3155_put_buf(buf, dt3155_free_bufs); + return NULL; + } + dt3155_put_buf(buf, dt3155_alloc_bufs); + *dma_handle = buf->dma; + return buf->cpu; +} + +static void +dt3155_free_buffer(struct device *dev, size_t size, void *cpu_addr, + dma_addr_t dma_handle) +{ + struct dt3155_buf *buf, *last; + int found = 0; + + last = dt3155_get_buf(dt3155_alloc_bufs); + BUG_ON(!last); + dt3155_put_buf(last, dt3155_alloc_bufs); + do { + buf = dt3155_get_buf(dt3155_alloc_bufs); + if (buf->cpu == cpu_addr && buf->dma == dma_handle) { + found = 1; + break; + } + dt3155_put_buf(buf, dt3155_alloc_bufs); + } while (buf != last); + BUG_ON(!found); + size = img_width * img_height; + dma_unmap_single(dev, dma_handle, size, DMA_FROM_DEVICE); + dt3155_put_buf(buf, dt3155_free_bufs); +} + +/* same as videobuf_dma_contig_user_get() */ +static int +dt3155_dma_contig_user_get(struct videobuf_dma_contig_memory *mem, + struct videobuf_buffer *vb) +{ + struct mm_struct *mm = current->mm; + struct vm_area_struct *vma; + unsigned long prev_pfn, this_pfn; + unsigned long pages_done, user_address; + int ret; + + mem->size = PAGE_ALIGN(vb->size); + mem->is_userptr = 0; + ret = -EINVAL; + + down_read(&mm->mmap_sem); + + vma = find_vma(mm, vb->baddr); + if (!vma) + goto out_up; + + if ((vb->baddr + mem->size) > vma->vm_end) + goto out_up; + + pages_done = 0; + prev_pfn = 0; /* kill warning */ + user_address = vb->baddr; + + while (pages_done < (mem->size >> PAGE_SHIFT)) { + ret = follow_pfn(vma, user_address, &this_pfn); + if (ret) + break; + + if (pages_done == 0) + mem->dma_handle = this_pfn << PAGE_SHIFT; + else if (this_pfn != (prev_pfn + 1)) + ret = -EFAULT; + + if (ret) + break; + + prev_pfn = this_pfn; + user_address += PAGE_SIZE; + pages_done++; + } + + if (!ret) + mem->is_userptr = 1; + + out_up: + up_read(¤t->mm->mmap_sem); + + return ret; +} + +/* same as videobuf_dma_contig_user_put() */ +static void +dt3155_dma_contig_user_put(struct videobuf_dma_contig_memory *mem) +{ + mem->is_userptr = 0; + mem->dma_handle = 0; + mem->size = 0; +} + +/* same as videobuf_iolock() but uses allocations from the pool */ +static int +dt3155_iolock(struct videobuf_queue *q, struct videobuf_buffer *vb, + struct v4l2_framebuffer *fbuf) +{ + struct videobuf_dma_contig_memory *mem = vb->priv; + + BUG_ON(!mem); + MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); + + switch (vb->memory) { + case V4L2_MEMORY_MMAP: + dev_dbg(q->dev, "%s memory method MMAP\n", __func__); + + /* All handling should be done by __videobuf_mmap_mapper() */ + if (!mem->vaddr) { + dev_err(q->dev, "memory is not alloced/mmapped.\n"); + return -EINVAL; + } + break; + case V4L2_MEMORY_USERPTR: + dev_dbg(q->dev, "%s memory method USERPTR\n", __func__); + + /* handle pointer from user space */ + if (vb->baddr) + return dt3155_dma_contig_user_get(mem, vb); + + /* allocate memory for the read() method */ + mem->size = PAGE_ALIGN(vb->size); + mem->vaddr = dt3155_alloc_buffer(q->dev, mem->size, + &mem->dma_handle, GFP_KERNEL); + if (!mem->vaddr) { + dev_err(q->dev, "dma_alloc_coherent %ld failed\n", + mem->size); + return -ENOMEM; + } + + dev_dbg(q->dev, "dma_alloc_coherent data is at %p (%ld)\n", + mem->vaddr, mem->size); + break; + case V4L2_MEMORY_OVERLAY: + default: + dev_dbg(q->dev, "%s memory method OVERLAY/unknown\n", + __func__); + return -EINVAL; + } + + return 0; +} + +/* same as videobuf_dma_contig_free() but uses the pool */ +void +dt3155_dma_contig_free(struct videobuf_queue *q, struct videobuf_buffer *buf) +{ + struct videobuf_dma_contig_memory *mem = buf->priv; + + /* mmapped memory can't be freed here, otherwise mmapped region + would be released, while still needed. In this case, the memory + release should happen inside videobuf_vm_close(). + So, it should free memory only if the memory were allocated for + read() operation. + */ + if (buf->memory != V4L2_MEMORY_USERPTR) + return; + + if (!mem) + return; + + MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); + + /* handle user space pointer case */ + if (buf->baddr) { + dt3155_dma_contig_user_put(mem); + return; + } + + /* read() method */ + dt3155_free_buffer(q->dev, mem->size, mem->vaddr, mem->dma_handle); + mem->vaddr = NULL; +} + +/* same as videobuf_vm_open() */ +static void +dt3155_vm_open(struct vm_area_struct *vma) +{ + struct videobuf_mapping *map = vma->vm_private_data; + + dev_dbg(map->q->dev, "vm_open %p [count=%u,vma=%08lx-%08lx]\n", + map, map->count, vma->vm_start, vma->vm_end); + + map->count++; +} + +/* same as videobuf_vm_close(), but free to the pool */ +static void +dt3155_vm_close(struct vm_area_struct *vma) +{ + struct videobuf_mapping *map = vma->vm_private_data; + struct videobuf_queue *q = map->q; + int i; + + dev_dbg(map->q->dev, "vm_close %p [count=%u,vma=%08lx-%08lx]\n", + map, map->count, vma->vm_start, vma->vm_end); + + map->count--; + if (0 == map->count) { + struct videobuf_dma_contig_memory *mem; + + dev_dbg(map->q->dev, "munmap %p q=%p\n", map, q); + mutex_lock(&q->vb_lock); + + /* We need first to cancel streams, before unmapping */ + if (q->streaming) + videobuf_queue_cancel(q); + + for (i = 0; i < VIDEO_MAX_FRAME; i++) { + if (NULL == q->bufs[i]) + continue; + + if (q->bufs[i]->map != map) + continue; + + mem = q->bufs[i]->priv; + if (mem) { + /* This callback is called only if kernel has + allocated memory and this memory is mmapped. + In this case, memory should be freed, + in order to do memory unmap. + */ + + MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); + + /* vfree is not atomic - can't be + called with IRQ's disabled + */ + dev_dbg(map->q->dev, "buf[%d] freeing %p\n", + i, mem->vaddr); + + dt3155_free_buffer(q->dev, mem->size, + mem->vaddr, mem->dma_handle); + mem->vaddr = NULL; + } + + q->bufs[i]->map = NULL; + q->bufs[i]->baddr = 0; + } + + kfree(map); + + mutex_unlock(&q->vb_lock); + } +} + +static const struct vm_operations_struct dt3155_vm_ops = { + .open = dt3155_vm_open, + .close = dt3155_vm_close, +}; + +/* same as videobuf_mmap_mapper(), but allocates from the pool */ +static int +dt3155_mmap_mapper(struct videobuf_queue *q, struct vm_area_struct *vma) +{ + struct videobuf_dma_contig_memory *mem; + struct videobuf_mapping *map; + unsigned int first; + int retval; + unsigned long size, offset = vma->vm_pgoff << PAGE_SHIFT; + + dev_dbg(q->dev, "%s\n", __func__); + if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED)) + return -EINVAL; + + /* look for first buffer to map */ + for (first = 0; first < VIDEO_MAX_FRAME; first++) { + if (!q->bufs[first]) + continue; + + if (V4L2_MEMORY_MMAP != q->bufs[first]->memory) + continue; + if (q->bufs[first]->boff == offset) + break; + } + if (VIDEO_MAX_FRAME == first) { + dev_dbg(q->dev, "invalid user space offset [offset=0x%lx]\n", + offset); + return -EINVAL; + } + + /* create mapping + update buffer list */ + map = kzalloc(sizeof(struct videobuf_mapping), GFP_KERNEL); + if (!map) + return -ENOMEM; + + q->bufs[first]->map = map; + map->start = vma->vm_start; + map->end = vma->vm_end; + map->q = q; + + q->bufs[first]->baddr = vma->vm_start; + + mem = q->bufs[first]->priv; + BUG_ON(!mem); + MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); + + mem->size = PAGE_ALIGN(q->bufs[first]->bsize); + mem->vaddr = dt3155_alloc_buffer(q->dev, mem->size, + &mem->dma_handle, GFP_KERNEL); + if (!mem->vaddr) { + dev_err(q->dev, "dma_alloc_coherent size %ld failed\n", + mem->size); + goto error; + } + dev_dbg(q->dev, "dma_alloc_coherent data is at addr %p (size %ld)\n", + mem->vaddr, mem->size); + + /* Try to remap memory */ + + size = vma->vm_end - vma->vm_start; + size = (size < mem->size) ? size : mem->size; + + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + retval = remap_pfn_range(vma, vma->vm_start, + mem->dma_handle >> PAGE_SHIFT, + size, vma->vm_page_prot); + if (retval) { + dev_err(q->dev, "mmap: remap failed with error %d. ", retval); + dt3155_free_buffer(q->dev, mem->size, + mem->vaddr, mem->dma_handle); + goto error; + } + + vma->vm_ops = &dt3155_vm_ops; + vma->vm_flags |= VM_DONTEXPAND; + vma->vm_private_data = map; + + dev_dbg(q->dev, "mmap %p: q=%p %08lx-%08lx (%lx) pgoff %08lx buf %d\n", + map, q, vma->vm_start, vma->vm_end, + (long int) q->bufs[first]->bsize, + vma->vm_pgoff, first); + + dt3155_vm_open(vma); + + return 0; + +error: + kfree(map); + return -ENOMEM; +} + +static int +dt3155_sync_for_cpu(struct videobuf_queue *q, struct videobuf_buffer *vb) +{ + struct dt3155_priv *pd = q->priv_data; + struct videobuf_dma_contig_memory *mem = vb->priv; + + BUG_ON(!mem); + MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); + + pci_dma_sync_single_for_cpu(pd->pdev, mem->dma_handle, + mem->size, PCI_DMA_FROMDEVICE); + return 0; +} + +static int +dt3155_sync_for_device(struct videobuf_queue *q, struct videobuf_buffer *vb) +{ + struct dt3155_priv *pd = q->priv_data; + struct videobuf_dma_contig_memory *mem = vb->priv; + + BUG_ON(!mem); + MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); + + pci_dma_sync_single_for_device(pd->pdev, mem->dma_handle, + mem->size, PCI_DMA_FROMDEVICE); + return 0; +} + +/* + * same as videobuf_queue_dma_contig_init(), but after + * initialisation overwrites videobuf_iolock() and + * videobuf_mmap_mapper() with our customized versions + * as well as adds sync() method + */ +static void +dt3155_queue_dma_contig_init(struct videobuf_queue *q, + struct videobuf_queue_ops *ops, + struct device *dev, + spinlock_t *irqlock, + enum v4l2_buf_type type, + enum v4l2_field field, + unsigned int msize, + void *priv) +{ + videobuf_queue_dma_contig_init(q, ops, dev, irqlock, + type, field, msize, priv); + /* overwrite with our methods */ + q->int_ops->iolock = dt3155_iolock; + q->int_ops->mmap_mapper = dt3155_mmap_mapper; + q->int_ops->sync = dt3155_sync_for_cpu; +} + +static int +dt3155_start_acq(struct file *filp, struct videobuf_buffer *vb, + const char *f_name) +{ + struct dt3155_priv *pd = video_drvdata(filp); + dma_addr_t dma_addr; + + /* prepare acquisition */ + pd->curr_buf = vb; + 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); + 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 file *filp, struct videobuf_buffer *vb, + const char *f_name) +{ + int tmp; + struct dt3155_priv *pd = video_drvdata(filp); + + /* stop the board */ + wait_i2c_reg(pd->regs); + write_i2c_reg(pd->regs, CSR2, pd->csr2); + + /* disable all irqs from the board */ + 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: %s(): corrupted field %u\n", + f_name, 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; +} + +static int +dt3155_buf_setup(struct videobuf_queue *q, unsigned int *count, + unsigned int *size) +{ + *size = img_width * img_height; + return 0; +} + +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; + else + vb->state = VIDEOBUF_PREPARED; + return ret; +} + +static void +dt3155_buf_queue(struct videobuf_queue *q, struct videobuf_buffer *vb) +{ + struct dt3155_priv *pd = q->priv_data; + + dt3155_sync_for_device(q, vb); + if (pd->acq_fp) { + /* start capture here for read() */ + vb->state = VIDEOBUF_ACTIVE; + dt3155_start_acq(pd->acq_fp, vb, __func__); + } else + vb->state = VIDEOBUF_QUEUED; +} + +static void +dt3155_buf_release(struct videobuf_queue *q, struct videobuf_buffer *vb) +{ + videobuf_waiton(vb, 0, 0); /* FIXME: cannot be interrupted */ + dt3155_dma_contig_free(q, vb); +} + +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; + 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); + 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(); + } + /* stop the board */ + write_i2c_reg_nowait(ipd->regs, CSR2, ipd->csr2); + /* disable interrupts */ + iowrite32(FLD_START | FLD_END_EVEN | FLD_END_ODD, ipd->regs + INT_CSR); + ipd->curr_buf->state = VIDEOBUF_DONE; + wake_up_interruptible_sync(&ipd->curr_buf->done); + return IRQ_HANDLED; +} + +static int +dt3155_open(struct file *filp) +{ + int ret = 0; + struct dt3155_priv *pd = video_drvdata(filp); + + PR(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; + } + dt3155_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 */ + 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->users++; + goto done; +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); + int ret = 0; + + PR(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) { + /* disable all irqs */ + dt3155_stop_acq(filp, pd->curr_buf, __func__); + iowrite32(FLD_START | FLD_END_EVEN | FLD_END_ODD, + pd->regs + INT_CSR); + videobuf_stop(pd->vidq); + ret = videobuf_mmap_free(pd->vidq); + if (ret) + printk(KERN_ERR "dt3155: ERR: videobuf_mmap_free()\n"); + pd->acq_fp = NULL; + } + if (!pd->users) { + 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); + + if (mutex_lock_interruptible(&pd->mux) == -EINTR) + return -ERESTARTSYS; + if (!pd->acq_fp) + pd->acq_fp = filp; + else if (pd->acq_fp != filp) { + mutex_unlock(&pd->mux); + return -EBUSY; + } + mutex_unlock(&pd->mux); + if (size > img_width * img_height) + size = img_width * img_height; + return videobuf_read_one(pd->vidq, user, size, loff, + filp->f_flags & O_NONBLOCK); +} + +static ssize_t +dt3155_write(struct file *filp, const char __user *user, size_t size, + loff_t *loff) +{ + struct dt3155_priv *pd = video_drvdata(filp); + + PR(KERN_DEBUG "%s()\n", __func__); + + pd->vidq->read_buf->state = VIDEOBUF_DONE; + wake_up(&pd->vidq->read_buf->done); + return size; +} + +static unsigned int +dt3155_poll(struct file *filp, struct poll_table_struct *polltbl) +{ + struct dt3155_priv *pd = video_drvdata(filp); + int ret; + + PR(KERN_DEBUG "%s()\n", __func__); + + if (mutex_lock_interruptible(&pd->mux) == -EINTR) + return -ERESTARTSYS; + ret = videobuf_poll_stream(filp, pd->vidq, polltbl); + mutex_unlock(&pd->mux); + return ret; +} + +/* +static int +dt3155_mmap(struct file *filp, struct vm_area_struct *vma) +{ + printk(KERN_DEBUG "%s()\n", __func__); + + return 0; +} +*/ + +static const struct v4l2_file_operations dt3155_fops = { + .owner = THIS_MODULE, + .open = dt3155_open, + .release = dt3155_release, + .read = dt3155_read, + .write = dt3155_write, + .poll = dt3155_poll, + .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */ +/* + .mmap = dt3155_mmap, +*/ +}; + +static int +dt3155_ioc_querycap(struct file *filp, void *priv, 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 *priv, + 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 *priv, struct v4l2_format *f) +{ + PR(KERN_DEBUG "Entering: %s()\n", __func__); + + 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 *priv, + struct v4l2_format *f) +{ + PR(KERN_DEBUG "Entering: %s()\n", __func__); + + 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 *priv, 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_reqbufs(struct file *filp, void *fh, struct v4l2_requestbuffers *b) +{ + struct videobuf_queue *q = fh; + + PR(KERN_DEBUG "Entering: %s()\n", __func__); + + if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + if (b->memory != V4L2_MEMORY_MMAP) + return -EINVAL; + b->count = VIDEO_MAX_FRAME; + return videobuf_reqbufs(q, b); +} + +static int +dt3155_ioc_querybuf(struct file *filp, void *fh, struct v4l2_buffer *b) +{ + struct videobuf_queue *q = fh; + + PR(KERN_DEBUG "Entering: %s()\n", __func__); + + if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + if (b->index >= VIDEO_MAX_FRAME) + return -EINVAL; + b->bytesused = img_width * img_height; + b->field = V4L2_FIELD_NONE; + b->length = b->bytesused; + return videobuf_querybuf(q, b); +} + +static int +dt3155_ioc_qbuf(struct file *filp, void *fh, struct v4l2_buffer *b) +{ + struct videobuf_queue *q = fh; + + PR(KERN_DEBUG "Entering: %s()\n", __func__); + + if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + if (b->index >= VIDEO_MAX_FRAME || b->memory != V4L2_MEMORY_MMAP) + return -EINVAL; + b->flags = V4L2_BUF_FLAG_QUEUED; + return videobuf_qbuf(q, b); +} + +static int +dt3155_ioc_dqbuf(struct file *filp, void *fh, struct v4l2_buffer *b) +{ + struct videobuf_queue *q = fh; + + PR(KERN_DEBUG "Entering: %s()\n", __func__); + + if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + if (b->index >= VIDEO_MAX_FRAME || b->memory != V4L2_MEMORY_MMAP) + return -EINVAL; + b->flags = V4L2_BUF_FLAG_MAPPED; + return videobuf_dqbuf(q, b, 0); +} + +static int +dt3155_ioc_querystd(struct file *filp, void *fh, v4l2_std_id *norm) +{ + *norm = DT3155_CURRENT_NORM; + return 0; +} + +static int +dt3155_ioc_g_std(struct file *filp, void *fh, v4l2_std_id *norm) +{ + *norm = DT3155_CURRENT_NORM; + return 0; +} + +static int +dt3155_ioc_s_std(struct file *filp, void *fh, v4l2_std_id *norm) +{ + if (*norm & DT3155_CURRENT_NORM) + return 0; + return -EINVAL; +} + +static int +dt3155_ioc_enum_input(struct file *filp, void *priv, struct v4l2_input *input) +{ + if (input->index) + return -EINVAL; + strcpy(input->name, "Coax in"); + input->type = V4L2_INPUT_TYPE_CAMERA; + input->std = V4L2_STD_ALL; + 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 *priv, unsigned int *i) +{ + *i = 0; + return 0; +} + +static int +dt3155_ioc_s_input(struct file *filp, void *priv, unsigned int i) +{ + if (i) + return -EINVAL; + return 0; +} + +static const struct v4l2_ioctl_ops dt3155_ioctl_ops = { + .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_streamon = dt3155_ioc_streamon, + .vidioc_streamoff = dt3155_ioc_streamoff, + .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) +{ + int i; + u8 tmp; + struct dt3155_buf *buf; + struct dt3155_priv *pd = pci_get_drvdata(dev); + 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 and pci_map memory, and initialize the DMA machine */ + buf = dt3155_get_buf(dt3155_free_bufs); + if (!buf) { + printk(KERN_ERR "dt3155: dt3155_get_buf " + "(in dt3155_init_board) failed\n"); + return -ENOMEM; + } + buf->dma = pci_map_single(dev, buf->cpu, + DT3155_BUF_SIZE, PCI_DMA_FROMDEVICE); + if (pci_dma_mapping_error(dev, buf->dma)) { + printk(KERN_ERR "dt3155: pci_map_single failed\n"); + dt3155_put_buf(buf, dt3155_free_bufs); + 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); + + /* pci_unmap and deallocate memory */ + pci_unmap_single(dev, buf->dma, DT3155_BUF_SIZE, PCI_DMA_FROMDEVICE); + dt3155_put_buf(buf, dt3155_free_bufs); + 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 = V4L2_STD_ALL, + .current_norm = DT3155_CURRENT_NORM, +}; + +static int __devinit +dt3155_probe(struct pci_dev *dev, const struct pci_device_id *id) +{ + int err = -ENODEV; + struct dt3155_priv *pd; + + printk(KERN_INFO "dt3155: probe()\n"); + if (pci_set_dma_mask(dev, DMA_BIT_MASK(32))) { + printk(KERN_ERR "dt3155: cannot set dma_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 vdp 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; + 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; + } + 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"); + 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"); + dt3155_chunks = dt3155_init_chunks_fifo(); + if (!dt3155_chunks) { + err = -ENOMEM; + printk(KERN_ERR "dt3155: cannot init dt3155_chunks_fifo\n"); + goto err_init_chunks_fifo; + } + dt3155_free_bufs = dt3155_init_ibufs_fifo(dt3155_chunks, + DT3155_BUF_SIZE); + if (!dt3155_free_bufs) { + err = -ENOMEM; + printk(KERN_ERR "dt3155: cannot dt3155_init_ibufs_fifo\n"); + goto err_init_ibufs_fifo; + } + dt3155_alloc_bufs = dt3155_init_fifo(); + if (!dt3155_alloc_bufs) { + err = -ENOMEM; + printk(KERN_ERR "dt3155: cannot dt3155_init_fifo\n"); + goto err_init_fifo; + } + err = pci_register_driver(&pci_driver); + if (err) { + printk(KERN_ERR "dt3155: cannot register pci_driver\n"); + goto err_register_driver; + } + return 0; /* succes */ +err_register_driver: + dt3155_free_fifo(dt3155_alloc_bufs); +err_init_fifo: + dt3155_free_ibufs_fifo(dt3155_free_bufs); +err_init_ibufs_fifo: + dt3155_free_chunks_fifo(dt3155_chunks); +err_init_chunks_fifo: + return err; +} + +static void __exit +dt3155_exit_module(void) +{ + pci_unregister_driver(&pci_driver); + dt3155_free_fifo(dt3155_alloc_bufs); + dt3155_free_ibufs_fifo(dt3155_free_bufs); + dt3155_free_chunks_fifo(dt3155_chunks); + 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"); diff -uN a/drivers/staging/dt3155v4l/dt3155v4l.h b/drivers/staging/dt3155v4l/dt3155v4l.h --- a/drivers/staging/dt3155v4l/dt3155v4l.h 1970-01-01 02:00:00.000000000 +0200 +++ b/drivers/staging/dt3155v4l/dt3155v4l.h 2010-03-20 18:07:01.000000000 +0200 @@ -0,0 +1,214 @@ +/*************************************************************************** + * 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. * + ***************************************************************************/ + +/* DT3155 header file */ +#ifndef _DT3155_H_ +#define _DT3155_H_ + +#ifdef __KERNEL__ + +#include <linux/pci.h> +#include <linux/interrupt.h> + +#define DT3155_NAME "dt3155" +#define DT3155_VER_MAJ 1 +#define DT3155_VER_MIN 0 +#define DT3155_VER_EXT 0 +#define DT3155_VERSION __stringify(DT3155_VER_MAJ) "." \ + __stringify(DT3155_VER_MIN) "." \ + __stringify(DT3155_VER_EXT) + +/* DT3155 Base Register offsets (memory mapped) */ +#define EVEN_DMA_START 0x00 +#define ODD_DMA_START 0x0C +#define EVEN_DMA_STRIDE 0x18 +#define ODD_DMA_STRIDE 0x24 +#define EVEN_PIXEL_FMT 0x30 +#define ODD_PIXEL_FMT 0x34 +#define FIFO_TRIGER 0x38 +#define XFER_MODE 0x3C +#define CSR1 0x40 +#define RETRY_WAIT_CNT 0x44 +#define INT_CSR 0x48 +#define EVEN_FLD_MASK 0x4C +#define ODD_FLD_MASK 0x50 +#define MASK_LENGTH 0x54 +#define FIFO_FLAG_CNT 0x58 +#define IIC_CLK_DUR 0x5C +#define IIC_CSR1 0x60 +#define IIC_CSR2 0x64 + +/* DT3155 Internal Registers indexes (i2c/IIC mapped) */ +#define CSR2 0x10 +#define EVEN_CSR 0x11 +#define ODD_CSR 0x12 +#define CONFIG 0x13 +#define DT_ID 0x1F +#define X_CLIP_START 0x20 +#define Y_CLIP_START 0x22 +#define X_CLIP_END 0x24 +#define Y_CLIP_END 0x26 +#define AD_ADDR 0x30 +#define AD_LUT 0x31 +#define AD_CMD 0x32 +#define DIG_OUT 0x40 +#define PM_LUT_ADDR 0x50 +#define PM_LUT_DATA 0x51 + +/* AD command register values */ +#define AD_CMD_REG 0x00 +#define AD_POS_REF 0x01 +#define AD_NEG_REF 0x02 + +/* CSR1 bit masks */ +#define CRPT_DIS 0x00004000 +#define FLD_CRPT_ODD 0x00000200 +#define FLD_CRPT_EVEN 0x00000100 +#define FIFO_EN 0x00000080 +#define SRST 0x00000040 +#define FLD_DN_ODD 0x00000020 +#define FLD_DN_EVEN 0x00000010 +/* These should not be used. + * Use CAP_CONT_ODD/EVEN instead +#define CAP_SNGL_ODD 0x00000008 +#define CAP_SNGL_EVEN 0x00000004 +*/ +#define CAP_CONT_ODD 0x00000002 +#define CAP_CONT_EVEN 0x00000001 + +/* INT_CSR bit masks */ +#define FLD_START_EN 0x00000400 +#define FLD_END_ODD_EN 0x00000200 +#define FLD_END_EVEN_EN 0x00000100 +#define FLD_START 0x00000004 +#define FLD_END_ODD 0x00000002 +#define FLD_END_EVEN 0x00000001 + +/* IIC_CSR1 bit masks */ +#define DIRECT_ABORT 0x00000200 + +/* IIC_CSR2 bit masks */ +#define NEW_CYCLE 0x01000000 +#define DIR_RD 0x00010000 +#define IIC_READ 0x01010000 +#define IIC_WRITE 0x01000000 + +/* CSR2 bit masks */ +#define DISP_PASS 0x40 +#define BUSY_ODD 0x20 +#define BUSY_EVEN 0x10 +#define SYNC_PRESENT 0x08 +#define VT_50HZ 0x04 +#define SYNC_SNTL 0x02 +#define CHROM_FILT 0x01 +#define VT_60HZ 0x00 + +/* CSR_EVEN/ODD bit masks */ +#define CSR_ERROR 0x04 +#define CSR_SNGL 0x02 +#define CSR_DONE 0x01 + +/* CONFIG bit masks */ +#define PM_LUT_PGM 0x80 +#define PM_LUT_SEL 0x40 +#define CLIP_EN 0x20 +#define HSCALE_EN 0x10 +#define EXT_TRIG_UP 0x0C +#define EXT_TRIG_DOWN 0x04 +#define ACQ_MODE_NEXT 0x02 +#define ACQ_MODE_ODD 0x01 +#define ACQ_MODE_EVEN 0x00 + +/* AD_CMD bit masks */ +#define VIDEO_CNL_1 0x00 +#define VIDEO_CNL_2 0x40 +#define VIDEO_CNL_3 0x80 +#define VIDEO_CNL_4 0xC0 +#define SYNC_CNL_1 0x00 +#define SYNC_CNL_2 0x10 +#define SYNC_CNL_3 0x20 +#define SYNC_CNL_4 0x30 +#define SYNC_LVL_1 0x00 +#define SYNC_LVL_2 0x04 +#define SYNC_LVL_3 0x08 +#define SYNC_LVL_4 0x0C + +/* DT3155 identificator */ +#define DT3155_ID 0x20 + +#ifdef CONFIG_DT3155_CCIR + #define DMA_STRIDE 768 +#else + #define DMA_STRIDE 640 +#endif + +/** + * struct dt3155_stats - statistics structure + * + * @free_bufs_empty: no free image buffers + * @corrupted_fields: corrupted fields + * @dma_map_failed: dma mapping failed + * @start_before_end: new started before old ended + */ +struct dt3155_stats { + int free_bufs_empty; + int corrupted_fields; + int dma_map_failed; + int start_before_end; +}; + +/* per board private data structure */ +/** + * struct dt3155_priv - private data structure + * + * @vdev: pointer to video_device structure + * @acq_fp pointer to filp that starts acquisition + * @pdev: pointer to pci_dev structure + * @vidq pointer to videobuf_queue structure + * @curr_buf: pointer to curren buffer + * @irq_handler: irq handler for the driver + * @mux: mutex to protect the instance + * @lock spinlock + * @stats: statistics structure + * @users open count + * @dma_running dma is running + * @regs: local copy of mmio base register + * @csr2: local copy of csr2 register + * @config: local copy of config register + */ +struct dt3155_priv { + struct video_device *vdev; + struct file *acq_fp; + struct pci_dev *pdev; + struct videobuf_queue *vidq; + struct videobuf_buffer *curr_buf; + irq_handler_t irq_handler; + struct mutex mux; + spinlock_t lock; + struct dt3155_stats stats; + void *regs; + unsigned int users; + unsigned int dma_running; + u8 csr2, config; +}; + +#endif /* __KERNEL__ */ + +#endif /* _DT3155_H_ */ ============================================== A patch for drivers/staging/Kconfig Signed-off-by: Marin Mitov <mitov@issp.bas.bg> ====================================================================== --- a/drivers/staging/Kconfig 2010-03-20 18:11:30.000000000 +0200 +++ b/drivers/staging/Kconfig 2010-03-20 18:12:23.000000000 +0200 @@ -137,6 +137,8 @@ source "drivers/staging/dt3155/Kconfig" +source "drivers/staging/dt3155v4l/Kconfig" + source "drivers/staging/crystalhd/Kconfig" endif # !STAGING_EXCLUDE_BUILD ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [RFC] Yet another (third) dt3155 driver PCI/video4linux compliant 2010-03-20 19:40 ` Marin Mitov @ 2010-04-27 23:18 ` Greg KH 2010-04-30 15:36 ` Marin Mitov 0 siblings, 1 reply; 7+ messages in thread From: Greg KH @ 2010-04-27 23:18 UTC (permalink / raw) To: Marin Mitov; +Cc: Scott Smedley, linux-kernel On Sat, Mar 20, 2010 at 09:40:16PM +0200, Marin Mitov wrote: > On 20.3.2010, Greg KH wrote: > > On Sat, Mar 20, 2010 at 11:18:36AM +0200, Marin Mitov wrote: > > > Hi Scott, Greg, all, > > > > > > Here you will find a link to the source code for a dt3155 driver > > > rewritten to be PCI/video4linux compliant. > > > > > > http://lfb.issp.bas.bg/~mitov/linux/dt3155v4l/ > > > > > > It works with xawtv (if the window is bigger than the acquired image). > > > See > > > > > > http://lfb.issp.bas.bg/~mitov/linux/dt3155v4l/00README > > > > > > for more details. > > > > > > Any critics/comments will be appreciated. > > > > Can you send it in patch form? I can't really do anything with it like > > this, sorry. > > > > greg k-h > > OK, here it is: > > ====================================================== > > Kernel module (device driver) for dt3155 frame grabber > video4linux2 compliant (finaly). Works with xawtv. > > ====================================================== > > This driver is written (almost) from scratch, usung the > allocator developed for dt3155pci see bellow). The driver > uses videobuf-dma-contig interface modified to use the above > mentioned allocator instead of dma_alloc_coheren(). > > The first thing to do was to design a new allocator based > on allocating a configurable number of 4MB chunks of memory, > that latter are broken into frame buffers of 768x576 bytes > kept in different FIFOs (queues). As far as the driver autoloads > as a kernel module during kernel boot, the allocation of 4MB > chunks succeeds. > > The driver keeps three FIFOs: one for 4MB chunks, one for free > buffers (available for allocations) and one for buffers already > allocated. Allocation/deallocation is done automatically though > the video4linux videobuf subsystem (some pointers to functions > are replaced by driver supplied functions). > > Sure, there are problems: > > 1. The device works by read() method only (for now). > > 2. Works for CCIR, but should work for RS-170 (not tested) > This is made during kernel configuration. > > 3. Could work for multiple dt3155 frame grabbers in a PC, > (private data is allocated during PCI probe() method), but > is not tested due to lack of a second board. > > 4. Not tested on a BIG ENDIAN architecture. > > 5. Many others you could find .... :-) > > All critics, comments, suggestions are wellcome. I like it, want me to apply it? Right now it fails to build, but that should be simple to fix up, I'll be glad to do that. thanks, greg k-h ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [RFC] Yet another (third) dt3155 driver PCI/video4linux compliant 2010-04-27 23:18 ` Greg KH @ 2010-04-30 15:36 ` Marin Mitov 2010-05-01 17:58 ` Greg KH 0 siblings, 1 reply; 7+ messages in thread From: Marin Mitov @ 2010-04-30 15:36 UTC (permalink / raw) To: Greg KH; +Cc: Scott Smedley, linux-kernel, Mauro Carvalho Chehab On 28.4.2010, Greg KH wrote: > On Sat, Mar 20, 2010 at 09:40:16PM +0200, Marin Mitov wrote: > > On 20.3.2010, Greg KH wrote: > > > On Sat, Mar 20, 2010 at 11:18:36AM +0200, Marin Mitov wrote: > > > > Hi Scott, Greg, all, > > > > > > > > Here you will find a link to the source code for a dt3155 driver > > > > rewritten to be PCI/video4linux compliant. > > > > > > > > http://lfb.issp.bas.bg/~mitov/linux/dt3155v4l/ > > > > > > > > It works with xawtv (if the window is bigger than the acquired image). > > > > See > > > > > > > > http://lfb.issp.bas.bg/~mitov/linux/dt3155v4l/00README > > > > > > > > for more details. > > > > > > > > Any critics/comments will be appreciated. > > > > > > Can you send it in patch form? I can't really do anything with it like > > > this, sorry. > > > > > > greg k-h > > > > OK, here it is: > > > > ====================================================== > > > > Kernel module (device driver) for dt3155 frame grabber > > video4linux2 compliant (finaly). Works with xawtv. > > > > ====================================================== > > > > This driver is written (almost) from scratch, usung the > > allocator developed for dt3155pci see bellow). The driver > > uses videobuf-dma-contig interface modified to use the above > > mentioned allocator instead of dma_alloc_coheren(). > > > > The first thing to do was to design a new allocator based > > on allocating a configurable number of 4MB chunks of memory, > > that latter are broken into frame buffers of 768x576 bytes > > kept in different FIFOs (queues). As far as the driver autoloads > > as a kernel module during kernel boot, the allocation of 4MB > > chunks succeeds. > > > > The driver keeps three FIFOs: one for 4MB chunks, one for free > > buffers (available for allocations) and one for buffers already > > allocated. Allocation/deallocation is done automatically though > > the video4linux videobuf subsystem (some pointers to functions > > are replaced by driver supplied functions). > > > > Sure, there are problems: > > > > 1. The device works by read() method only (for now). > > > > 2. Works for CCIR, but should work for RS-170 (not tested) > > This is made during kernel configuration. > > > > 3. Could work for multiple dt3155 frame grabbers in a PC, > > (private data is allocated during PCI probe() method), but > > is not tested due to lack of a second board. > > > > 4. Not tested on a BIG ENDIAN architecture. > > > > 5. Many others you could find .... :-) > > > > All critics, comments, suggestions are wellcome. > > I like it, want me to apply it? Thank you for liking it. Since the time I sent the patch much in the driver has changed. Now it works (tested only with xawtv -f) with read(), as well as mmap(), but see below for the problems. Now I send you an updated patch, but it is not reviewed. You could either review it :-) or apply the previous patch. In the last case I will prepare a difference patch and will send it. I should say the new patch is tested with kernel-2.6.32.12 > Right now it fails to build, but that > should be simple to fix up, I'll be glad to do that. Strange, I have tested the build here (both built-in and as module). What is the problem? May be it is also present in the new patch, sorry. > > thanks, > > greg k-h > Marin Mitov ====================================================== Kernel module (device driver) for dt3155 frame grabber video4linux2 compliant (finally). Works with "xawtv -f". ====================================================== This driver is written (almost) from scratch, using the allocator developed for dt3155pci see bellow). The driver uses videobuf-dma-contig interface modified to use the above mentioned allocator instead of dma_alloc_coheren(). The first thing to do was to design a new allocator based on allocating a configurable number of 4MB chunks of memory, that latter are broken into frame buffers of 768x576 bytes kept in different FIFOs (queues). As far as the driver autoloads as a kernel module during kernel boot, the allocation of 4MB chunks succeeds. The driver keeps three FIFOs: one for 4MB chunks, one for free buffers (available for allocations) and one for buffers already allocated. Allocation/deallocation is done automatically though the video4linux videobuf subsystem (some pointers to functions are replaced by driver supplied functions). Sure, there are problems: 1. The device tested to work with "xawtv -f" either via read() method (DT3155_STREAMING not selected), or via mmap() method (DT3155_STREAMING is selected) only. This coresponds to either cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE; or cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; but not when cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING | V4L2_CAP_READWRITE; This is because xawtv calls poll() before starting streaming, but videobuf_poll_stream() automatically starts reading if streaming is not started. This selection is made during kernel configuration (for now). 2. Works for CCIR, but should work for RS-170 (not tested) This is made also during kernel configuration. 3. Could work for multiple dt3155 frame grabbers in a PC, (private data is allocated during PCI probe() method), but is not tested due to lack of a second board. 4. Not tested on a BIG ENDIAN architecture. 5. Many others you could find .... :-) All critics, comments, suggestions are wellcome. Marin Mitov Signed-off-by: Marin Mitov <mitov@issp.bas.bg> ================================================================================ diff -uN a/drivers/staging/dt3155v4l/Kconfig b/drivers/staging/dt3155v4l/Kconfig --- a/drivers/staging/dt3155v4l/Kconfig 1970-01-01 02:00:00.000000000 +0200 +++ b/drivers/staging/dt3155v4l/Kconfig 2010-04-30 16:13:22.000000000 +0300 @@ -0,0 +1,28 @@ +config VIDEO_DT3155 + tristate "DT3155 frame grabber, Video4Linux interface" + depends on PCI && VIDEO_DEV && VIDEO_V4L2 + select VIDEOBUF_DMA_CONTIG + default n + ---help--- + Enables dt3155 device driver for the DataTranslation DT3155 frame grabber. + Say Y here if you have this hardware. + In doubt, say N. + + To compile this driver as a module, choose M here: the + module will be called dt3155_v4l. + +config DT3155_CCIR + bool "Selects CCIR/50Hz vertical refresh" + depends on VIDEO_DT3155 + default y + ---help--- + Select it for CCIR/50Hz (European region), + or leave it unselected for RS-170/60Hz (North America). + +config DT3155_STREAMING + bool "Selects mmap streaming instead of read method" + depends on VIDEO_DT3155 + default y + ---help--- + Select it if you wish to try mmap streaming, or + or leave it unselected for using read method. diff -uN a/drivers/staging/dt3155v4l/Makefile b/drivers/staging/dt3155v4l/Makefile --- a/drivers/staging/dt3155v4l/Makefile 1970-01-01 02:00:00.000000000 +0200 +++ b/drivers/staging/dt3155v4l/Makefile 2010-03-20 17:34:16.000000000 +0200 @@ -0,0 +1,4 @@ +obj-$(CONFIG_VIDEO_DT3155) += dt3155_v4l.o +dt3155_v4l-objs := \ + dt3155-bufs.o \ + dt3155v4l.o diff -uN a/drivers/staging/dt3155v4l/dt3155-bufs.c b/drivers/staging/dt3155v4l/dt3155-bufs.c --- a/drivers/staging/dt3155v4l/dt3155-bufs.c 1970-01-01 02:00:00.000000000 +0200 +++ b/drivers/staging/dt3155v4l/dt3155-bufs.c 2010-04-30 16:20:38.000000000 +0300 @@ -0,0 +1,256 @@ +/*************************************************************************** + * 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 "dt3155-bufs.h" + +/** + * dt3155_init_chunks_buf - creates a chunk buffer and allocates memory for it + * + * returns: a pointer to the struct dt3155_buf or NULL if failed + * + * Creates a struct dt3155_buf, then allocates a chunk of memory of + * size DT3155_CHUNK_SIZE and sets all the pages in it as Reserved. + * This is done to be able to use remap_pfn_range() on these buffers + * (which do not work on normal memory if Reserved bit is not set) + */ +struct dt3155_buf * +dt3155_init_chunks_buf(void) +{ /* could sleep */ + struct dt3155_buf *buf; + int i; + + buf = kzalloc(sizeof(*buf), GFP_KERNEL); + if (!buf) + return NULL; + buf->cpu = (void *)__get_free_pages(DT3155_CHUNK_FLAGS, + get_order(DT3155_CHUNK_SIZE)); + if (!buf->cpu) { + kfree(buf); + return NULL; + } + for (i = 0; i < DT3155_CHUNK_SIZE; i += PAGE_SIZE) + SetPageReserved(virt_to_page(buf->cpu + i)); + return buf; /* success */ +} + +/** + * dt3155_free_chunks_buf - destroys the specified buffer + * + * @buf: the buffer to be freed + * + * Clears Reserved bit of all pages in the chunk, frees the chunk memory + * and destroys struct dt3155_buf. + */ +void +dt3155_free_chunks_buf(struct dt3155_buf *buf) +{ + int i; + + for (i = 0; i < DT3155_CHUNK_SIZE; i += PAGE_SIZE) + ClearPageReserved(virt_to_page(buf->cpu + i)); + free_pages((unsigned long)buf->cpu, get_order(DT3155_CHUNK_SIZE)); + kfree(buf); +} + +/** + * dt3155_init_fifo - creates and initializes a fifo + * + * returns: a pointer to the crated and initialized struct dt3155_fifo + * or NULL if failed + */ +struct dt3155_fifo * +dt3155_init_fifo(void) +{ /* could sleep */ + struct dt3155_fifo *fifo = kzalloc(sizeof(*fifo), GFP_KERNEL); + if (fifo) + spin_lock_init(&fifo->lock); + return fifo; +} + +/* dt3155_free_fifo(x) defined as macro in dt3155.h */ + +/** + * dt3155_get_buf - gets a buffer from the fifo + * + * @fifo: the fifo to get a buffer from + * + * returns: a pointer to the buffer or NULL if failed + * + * dt3155_get_buf gets the fifo's spin_lock and returns the + * buffer pointed by the head. Could be used in any context. + */ +struct dt3155_buf * +dt3155_get_buf(struct dt3155_fifo *fifo) +{ + unsigned long flags; + struct dt3155_buf *tmp_buf; + + spin_lock_irqsave(&fifo->lock, flags); + tmp_buf = fifo->head; + if (fifo->head) + fifo->head = fifo->head->next; + if (!fifo->head) + fifo->tail = NULL; + spin_unlock_irqrestore(&fifo->lock, flags); + return tmp_buf; +} + +/** + * dt3155_put_buf - puts a buffer into a fifo + * + * @buf: the buffer to put + * @fifo: the fifo to put the buffer in + * + * dt3155_put_buf gets the fifo's spin_lock and puts the buf + * at the tail of the fifo. Could be used in any context. + */ +void +dt3155_put_buf(struct dt3155_buf *buf, struct dt3155_fifo *fifo) +{ + unsigned long flags; + + spin_lock_irqsave(&fifo->lock, flags); + buf->next = NULL; + if (fifo->tail) + fifo->tail->next = buf; + fifo->tail = buf; + if (!fifo->head) + fifo->head = buf; + spin_unlock_irqrestore(&fifo->lock, flags); +} + +/** + * dt3155_init_chunks_fifo - creates and fills a chunks_fifo + * + * returns: a pointer to the fifo or NULL if failed + * + * dt3155_init_chunks_fifo creates and fills the fifo with + * a number of chunks <= DT3155_CHUNK_NUM. The returned fifo + * contains at least one chunk. + */ +struct dt3155_fifo * +dt3155_init_chunks_fifo(void) +{ /* could sleep */ + int i; + + struct dt3155_fifo *chunks; + struct dt3155_buf *tmp_buf; + + chunks = dt3155_init_fifo(); + if (!chunks) + return NULL; + tmp_buf = dt3155_init_chunks_buf(); + if (!tmp_buf) { + dt3155_free_fifo(chunks); + return NULL; + } + dt3155_put_buf(tmp_buf, chunks); + for (i = 1; i < DT3155_CHUNK_NUM; i++) { + tmp_buf = dt3155_init_chunks_buf(); + if (!tmp_buf) + break; + dt3155_put_buf(tmp_buf, chunks); + } + return chunks; +} + +/** + * dt3155_free_chunks_fifo - empties and destroys the chunks_fifo + * + * @chunks: the chunks_fifo to be freed + * + * dt3155_free_chunks_fifo deallocates all chunks in the fifo and + * destroys it. + */ +void +dt3155_free_chunks_fifo(struct dt3155_fifo *chunks) +{ + int buf_count = 0; + struct dt3155_buf *buf; + + while ((buf = dt3155_get_buf(chunks))) { + dt3155_free_chunks_buf(buf); + buf_count++; + } + dt3155_free_fifo(chunks); + printk(KERN_INFO "dt3155: %i chunks freed\n", buf_count); +} + +/** + * dt3155_init_ibufs_fifo - creates and fills an image buffer fifo + * + * @chunks: chunks_fifo to take memory from + * @buf_size: the size of image buffers + * + * returns: a pointer to the fifo filled with image buffers + * + * dt3155_init_ibufs_fifo takes chunks from chunks_fifo, chops them + * into pieces of size buf_size and fills image fifo with them. + */ +struct dt3155_fifo * +dt3155_init_ibufs_fifo(struct dt3155_fifo *chunks, int buf_size) +{ /* could sleep */ + int i, buf_count = 0; + struct dt3155_buf *tmp_ibuf, *chunks_buf, *last_chunk; + struct dt3155_fifo *tmp_fifo; + + tmp_fifo = dt3155_init_fifo(); + if (!tmp_fifo) + return NULL; + last_chunk = chunks->tail; + do { + chunks_buf = dt3155_get_buf(chunks); + dt3155_put_buf(chunks_buf, chunks); + for (i = 0; i < DT3155_CHUNK_SIZE / buf_size; i++) { + tmp_ibuf = kzalloc(sizeof(*tmp_ibuf), GFP_KERNEL); + if (tmp_ibuf) { + tmp_ibuf->cpu = + chunks_buf->cpu + DT3155_BUF_SIZE * i; + dt3155_put_buf(tmp_ibuf, tmp_fifo); + buf_count++; + } else { + if (buf_count) { + goto print_num_bufs; + } else { + dt3155_free_fifo(tmp_fifo); + return NULL; + } + } + } + } while (chunks_buf != last_chunk); +print_num_bufs: + printk(KERN_INFO "dt3155: %i image buffers available\n", buf_count); + return tmp_fifo; +} + +/** + * dt3155_free_ibufs_fifo - empties and destroys an image fifo + * + * @fifo: the fifo to free + */ +void +dt3155_free_ibufs_fifo(struct dt3155_fifo *fifo) +{ + struct dt3155_buf *tmp_ibuf; + + while ((tmp_ibuf = dt3155_get_buf(fifo))) + kfree(tmp_ibuf); + kfree(fifo); +} diff -uN a/drivers/staging/dt3155v4l/dt3155-bufs.h b/drivers/staging/dt3155v4l/dt3155-bufs.h --- a/drivers/staging/dt3155v4l/dt3155-bufs.h 1970-01-01 02:00:00.000000000 +0200 +++ b/drivers/staging/dt3155v4l/dt3155-bufs.h 2010-04-30 16:20:33.000000000 +0300 @@ -0,0 +1,88 @@ +/*************************************************************************** + * 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. * + ***************************************************************************/ + +#ifndef _DT3155_BUFS_H_ +#define _DT3155_BUFS_H_ + +#include <linux/pci.h> + +/* 4 chunks of 4MB, 9 buffers each = 36 buffers (> VIDEO_MAX_FRAME) */ +#define DT3155_CHUNK_NUM 4 + +/* DT3155_CHUNK_SIZE should be 4M (2^22) or less, but more than image size */ +#define DT3155_CHUNK_SIZE (1U << 22) +#define DT3155_CHUNK_FLAGS (GFP_KERNEL | GFP_DMA32 | __GFP_COLD | __GFP_NOWARN) + +/* DT3155_BUF_SIZE = 108 * PAGE_SIZE, so each buf is PAGE_SIZE alligned */ +#define DT3155_BUF_SIZE (768 * 576) + +/** + * struct dt3155_buf - image buffer structure + * + * @cpu: virtual kernel address of the buffer + * @dma: dma (bus) address of the buffer + * @next: pointer to the next buffer in the fifo + * @tv: time value when the image has been acquired + */ +struct dt3155_buf { + void *cpu; + dma_addr_t dma; + struct dt3155_buf *next; + struct timeval tv; +}; + +/** + * struct dt3155_fifo - fifo structure + * + * @head: pointer to the head of the fifo + * @tail: pionter to the tail of the fifo + * @lock: spin_lock to protect the fifo + */ +struct dt3155_fifo { + struct dt3155_buf *head; + struct dt3155_buf *tail; + spinlock_t lock; +}; + +struct dt3155_buf * __must_check +dt3155_init_chunks_buf(void); +void +dt3155_free_chunks_buf(struct dt3155_buf *buf); + +struct dt3155_fifo * __must_check +dt3155_init_fifo(void); +#define dt3155_free_fifo(x) kfree(x) + +struct dt3155_buf * __must_check +dt3155_get_buf(struct dt3155_fifo *fifo); +void +dt3155_put_buf(struct dt3155_buf *buf, struct dt3155_fifo *fifo); + +struct dt3155_fifo * __must_check +dt3155_init_chunks_fifo(void); +void +dt3155_free_chunks_fifo(struct dt3155_fifo *chunks); + +struct dt3155_fifo * __must_check +dt3155_init_ibufs_fifo(struct dt3155_fifo *chunks, int buf_size); +void +dt3155_free_ibufs_fifo(struct dt3155_fifo *fifo); + +#endif /* _DT3155_BUFS_H_ */ diff -uN a/drivers/staging/dt3155v4l/dt3155v4l.c b/drivers/staging/dt3155v4l/dt3155v4l.c --- a/drivers/staging/dt3155v4l/dt3155v4l.c 1970-01-01 02:00:00.000000000 +0200 +++ b/drivers/staging/dt3155v4l/dt3155v4l.c 2010-04-30 16:21:01.000000000 +0300 @@ -0,0 +1,1537 @@ +#include <media/v4l2-dev.h> +#include <media/videobuf-core.h> +#include <media/v4l2-ioctl.h> +#include <linux/pci.h> +#include <linux/version.h> +#include <linux/stringify.h> +#include <media/videobuf-dma-contig.h> +#include <linux/kthread.h> + +#include "dt3155v4l.h" +#include "dt3155-bufs.h" + +#define DT3155_VENDOR_ID 0x8086 +#define DT3155_DEVICE_ID 0x1223 + +/* 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 *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 *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. + */ +void +write_i2c_reg_nowait(void *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 *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; +} + +/* + * global pointers to a list of 4MB chunks reserved at driver + * load, broken down to contiguous buffers of 768 * 576 bytes + * each to form a pool of buffers for allocations + * FIXME: add spinlock to protect moves between alloc/free lists + */ +static struct dt3155_fifo *dt3155_chunks; /* list of 4MB chuncks */ +static struct dt3155_fifo *dt3155_free_bufs; /* list of free buffers */ +static struct dt3155_fifo *dt3155_alloc_bufs; /* list of allocated buffers */ + +/* same as in <drivers/media/video/videobuf-dma-contig.c> */ +struct videobuf_dma_contig_memory { + u32 magic; + void *vaddr; + dma_addr_t dma_handle; + unsigned long size; + int is_userptr; +}; + +#define MAGIC_DC_MEM 0x0733ac61 +#define MAGIC_CHECK(is, should) \ + if (unlikely((is) != (should))) { \ + pr_err("magic mismatch: %x expected %x\n", (is), (should)); \ + BUG(); \ + } + +/* helper functions to allocate/free buffers from the pool */ +static void * +dt3155_alloc_buffer(struct device *dev, size_t size, dma_addr_t *dma_handle, + gfp_t flag) +{ + struct dt3155_buf *buf; + + if (size > DT3155_BUF_SIZE) + return NULL; + size = DT3155_BUF_SIZE; /* same for CCIR & RS-170 */ + buf = dt3155_get_buf(dt3155_free_bufs); + if (!buf) + return NULL; + buf->dma = dma_map_single(dev, buf->cpu, size, DMA_FROM_DEVICE); + if (dma_mapping_error(dev, buf->dma)) { + dt3155_put_buf(buf, dt3155_free_bufs); + return NULL; + } + dt3155_put_buf(buf, dt3155_alloc_bufs); + *dma_handle = buf->dma; + return buf->cpu; +} + +static void +dt3155_free_buffer(struct device *dev, size_t size, void *cpu_addr, + dma_addr_t dma_handle) +{ + struct dt3155_buf *buf, *last; + int found = 0; + + if (!cpu_addr) /* to free NULL is OK */ + return; + last = dt3155_get_buf(dt3155_alloc_bufs); + if (!last) { + printk(KERN_ERR "dt3155: %s(): no alloc buffers\n", __func__); + return; + } + dt3155_put_buf(last, dt3155_alloc_bufs); + do { + buf = dt3155_get_buf(dt3155_alloc_bufs); + if (buf->cpu == cpu_addr && buf->dma == dma_handle) { + found = 1; + break; + } + dt3155_put_buf(buf, dt3155_alloc_bufs); + } while (buf != last); + if (!found) { + printk(KERN_ERR "dt3155: %s(): buffer not found\n", __func__); + return; + } + size = DT3155_BUF_SIZE; /* same for CCIR & RS-170 */ + dma_unmap_single(dev, dma_handle, size, DMA_FROM_DEVICE); + dt3155_put_buf(buf, dt3155_free_bufs); +} + +/* same as videobuf_dma_contig_user_get() */ +static int +dt3155_dma_contig_user_get(struct videobuf_dma_contig_memory *mem, + struct videobuf_buffer *vb) +{ + struct mm_struct *mm = current->mm; + struct vm_area_struct *vma; + unsigned long prev_pfn, this_pfn; + unsigned long pages_done, user_address; + int ret; + + mem->size = PAGE_ALIGN(vb->size); + mem->is_userptr = 0; + ret = -EINVAL; + + down_read(&mm->mmap_sem); + + vma = find_vma(mm, vb->baddr); + if (!vma) + goto out_up; + + if ((vb->baddr + mem->size) > vma->vm_end) + goto out_up; + + pages_done = 0; + prev_pfn = 0; /* kill warning */ + user_address = vb->baddr; + + while (pages_done < (mem->size >> PAGE_SHIFT)) { + ret = follow_pfn(vma, user_address, &this_pfn); + if (ret) + break; + + if (pages_done == 0) + mem->dma_handle = this_pfn << PAGE_SHIFT; + else if (this_pfn != (prev_pfn + 1)) + ret = -EFAULT; + + if (ret) + break; + + prev_pfn = this_pfn; + user_address += PAGE_SIZE; + pages_done++; + } + + if (!ret) + mem->is_userptr = 1; + + out_up: + up_read(¤t->mm->mmap_sem); + + return ret; +} + +/* same as videobuf_dma_contig_user_put() */ +static void +dt3155_dma_contig_user_put(struct videobuf_dma_contig_memory *mem) +{ + mem->is_userptr = 0; + mem->dma_handle = 0; + mem->size = 0; +} + +/* same as videobuf_iolock() but uses allocations from the pool */ +static int +dt3155_iolock(struct videobuf_queue *q, struct videobuf_buffer *vb, + struct v4l2_framebuffer *fbuf) +{ + struct videobuf_dma_contig_memory *mem = vb->priv; + + BUG_ON(!mem); + MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); + + switch (vb->memory) { + case V4L2_MEMORY_MMAP: + dev_dbg(q->dev, "%s memory method MMAP\n", __func__); + + /* All handling should be done by __videobuf_mmap_mapper() */ + if (!mem->vaddr) { + dev_err(q->dev, "memory is not alloced/mmapped.\n"); + return -EINVAL; + } + break; + case V4L2_MEMORY_USERPTR: + dev_dbg(q->dev, "%s memory method USERPTR\n", __func__); + + /* handle pointer from user space */ + if (vb->baddr) + return dt3155_dma_contig_user_get(mem, vb); + + /* allocate memory for the read() method */ + mem->size = PAGE_ALIGN(vb->size); + mem->vaddr = dt3155_alloc_buffer(q->dev, mem->size, + &mem->dma_handle, GFP_KERNEL); + if (!mem->vaddr) { + dev_err(q->dev, "dma_alloc_coherent %ld failed\n", + mem->size); + return -ENOMEM; + } + + dev_dbg(q->dev, "dma_alloc_coherent data is at %p (%ld)\n", + mem->vaddr, mem->size); + break; + case V4L2_MEMORY_OVERLAY: + default: + dev_dbg(q->dev, "%s memory method OVERLAY/unknown\n", + __func__); + return -EINVAL; + } + + return 0; +} + +/* same as videobuf_dma_contig_free() but uses the pool */ +void +dt3155_dma_contig_free(struct videobuf_queue *q, struct videobuf_buffer *buf) +{ + struct videobuf_dma_contig_memory *mem = buf->priv; + + /* mmapped memory can't be freed here, otherwise mmapped region + would be released, while still needed. In this case, the memory + release should happen inside videobuf_vm_close(). + So, it should free memory only if the memory were allocated for + read() operation. + */ + if (buf->memory != V4L2_MEMORY_USERPTR) + return; + + if (!mem) + return; + + MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); + + /* handle user space pointer case */ + if (buf->baddr) { + dt3155_dma_contig_user_put(mem); + return; + } + + /* read() method */ + dt3155_free_buffer(q->dev, mem->size, mem->vaddr, mem->dma_handle); + mem->vaddr = NULL; +} + +/* same as videobuf_vm_open() */ +static void +dt3155_vm_open(struct vm_area_struct *vma) +{ + struct videobuf_mapping *map = vma->vm_private_data; + + dev_dbg(map->q->dev, "vm_open %p [count=%u,vma=%08lx-%08lx]\n", + map, map->count, vma->vm_start, vma->vm_end); + + map->count++; +} + +/* same as videobuf_vm_close(), but free to the pool */ +static void +dt3155_vm_close(struct vm_area_struct *vma) +{ + struct videobuf_mapping *map = vma->vm_private_data; + struct videobuf_queue *q = map->q; + int i; + + dev_dbg(map->q->dev, "vm_close %p [count=%u,vma=%08lx-%08lx]\n", + map, map->count, vma->vm_start, vma->vm_end); + + map->count--; + if (0 == map->count) { + struct videobuf_dma_contig_memory *mem; + + dev_dbg(map->q->dev, "munmap %p q=%p\n", map, q); + mutex_lock(&q->vb_lock); + + /* We need first to cancel streams, before unmapping */ + if (q->streaming) + videobuf_queue_cancel(q); + + for (i = 0; i < VIDEO_MAX_FRAME; i++) { + if (NULL == q->bufs[i]) + continue; + + if (q->bufs[i]->map != map) + continue; + + mem = q->bufs[i]->priv; + if (mem) { + /* This callback is called only if kernel has + allocated memory and this memory is mmapped. + In this case, memory should be freed, + in order to do memory unmap. + */ + + MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); + + /* vfree is not atomic - can't be + called with IRQ's disabled + */ + dev_dbg(map->q->dev, "buf[%d] freeing %p\n", + i, mem->vaddr); + + dt3155_free_buffer(q->dev, mem->size, + mem->vaddr, mem->dma_handle); + mem->vaddr = NULL; + } + + q->bufs[i]->map = NULL; + q->bufs[i]->baddr = 0; + } + + kfree(map); + + mutex_unlock(&q->vb_lock); + } +} + +static const struct vm_operations_struct dt3155_vm_ops = { + .open = dt3155_vm_open, + .close = dt3155_vm_close, +}; + +/* same as videobuf_mmap_mapper(), but allocates from the pool */ +static int +dt3155_mmap_mapper(struct videobuf_queue *q, struct vm_area_struct *vma) +{ + struct videobuf_dma_contig_memory *mem; + struct videobuf_mapping *map; + unsigned int first; + int retval; + unsigned long size, offset = vma->vm_pgoff << PAGE_SHIFT; + + dev_dbg(q->dev, "%s\n", __func__); + if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED)) + return -EINVAL; + + /* look for first buffer to map */ + for (first = 0; first < VIDEO_MAX_FRAME; first++) { + if (!q->bufs[first]) + continue; + + if (V4L2_MEMORY_MMAP != q->bufs[first]->memory) + continue; + if (q->bufs[first]->boff == offset) + break; + } + if (VIDEO_MAX_FRAME == first) { + dev_dbg(q->dev, "invalid user space offset [offset=0x%lx]\n", + offset); + return -EINVAL; + } + + /* create mapping + update buffer list */ + map = kzalloc(sizeof(struct videobuf_mapping), GFP_KERNEL); + if (!map) + return -ENOMEM; + + q->bufs[first]->map = map; + map->start = vma->vm_start; + map->end = vma->vm_end; + map->q = q; + + q->bufs[first]->baddr = vma->vm_start; + + mem = q->bufs[first]->priv; + BUG_ON(!mem); + MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); + + mem->size = PAGE_ALIGN(q->bufs[first]->bsize); + mem->vaddr = dt3155_alloc_buffer(q->dev, mem->size, + &mem->dma_handle, GFP_KERNEL); + if (!mem->vaddr) { + dev_err(q->dev, "dma_alloc_coherent size %ld failed\n", + mem->size); + goto error; + } + dev_dbg(q->dev, "dma_alloc_coherent data is at addr %p (size %ld)\n", + mem->vaddr, mem->size); + + /* Try to remap memory */ + + size = vma->vm_end - vma->vm_start; + size = (size < mem->size) ? size : mem->size; + + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + retval = remap_pfn_range(vma, vma->vm_start, + mem->dma_handle >> PAGE_SHIFT, + size, vma->vm_page_prot); + if (retval) { + dev_err(q->dev, "mmap: remap failed with error %d. ", retval); + dt3155_free_buffer(q->dev, mem->size, + mem->vaddr, mem->dma_handle); + goto error; + } + + vma->vm_ops = &dt3155_vm_ops; + vma->vm_flags |= VM_DONTEXPAND; + vma->vm_private_data = map; + + dev_dbg(q->dev, "mmap %p: q=%p %08lx-%08lx (%lx) pgoff %08lx buf %d\n", + map, q, vma->vm_start, vma->vm_end, + (long int) q->bufs[first]->bsize, + vma->vm_pgoff, first); + + dt3155_vm_open(vma); + + return 0; + +error: + kfree(map); + return -ENOMEM; +} + +static int +dt3155_sync_for_cpu(struct videobuf_queue *q, struct videobuf_buffer *vb) +{ + struct dt3155_priv *pd = q->priv_data; + struct videobuf_dma_contig_memory *mem = vb->priv; + + BUG_ON(!mem); + MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); + + pci_dma_sync_single_for_cpu(pd->pdev, mem->dma_handle, + mem->size, PCI_DMA_FROMDEVICE); + return 0; +} + +static int +dt3155_sync_for_device(struct videobuf_queue *q, struct videobuf_buffer *vb) +{ + struct dt3155_priv *pd = q->priv_data; + struct videobuf_dma_contig_memory *mem = vb->priv; + + BUG_ON(!mem); + MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); + + pci_dma_sync_single_for_device(pd->pdev, mem->dma_handle, + mem->size, PCI_DMA_FROMDEVICE); + return 0; +} + +/* + * same as videobuf_queue_dma_contig_init(), but after + * initialisation overwrites videobuf_iolock() and + * videobuf_mmap_mapper() with our customized versions + * as well as adds sync() method + */ +static void +dt3155_queue_dma_contig_init(struct videobuf_queue *q, + struct videobuf_queue_ops *ops, + struct device *dev, + spinlock_t *irqlock, + enum v4l2_buf_type type, + enum v4l2_field field, + unsigned int msize, + void *priv) +{ + videobuf_queue_dma_contig_init(q, ops, dev, irqlock, + type, field, msize, priv); + /* overwrite with our methods */ + q->int_ops->iolock = dt3155_iolock; + q->int_ops->mmap_mapper = dt3155_mmap_mapper; + q->int_ops->sync = dt3155_sync_for_cpu; +} + +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); + } 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; + dt3155_sync_for_device(q, vb); + 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 */ + dt3155_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; + } + dt3155_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; + } + 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; + else if (pd->acq_fp != filp) { + ret = -EBUSY; + 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; + wake_up_interruptible_sync(&pd->do_dma); + } else if (pd->acq_fp == filp) { + 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 | +#ifdef CONFIG_DT3155_STREAMING + V4L2_CAP_STREAMING; +#else + V4L2_CAP_READWRITE; +#endif + 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) +{ + return dt3155_ioc_g_fmt_vid_cap(filp, p, f); +} + +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; + + if (b->memory != V4L2_MEMORY_MMAP) + return -EINVAL; + if (b->count) + return videobuf_reqbufs(q, b); + else { /* FIXME: is it necessary? */ + printk(KERN_DEBUG "dt3155: request to free buffers\n"); + return videobuf_mmap_free(q); + } +} + +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; + + return videobuf_qbuf(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; + input->std = V4L2_STD_ALL; + 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; + 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; + 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) +{ + int i; + u8 tmp; + struct dt3155_buf *buf; + struct dt3155_priv *pd = pci_get_drvdata(dev); + 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 and pci_map memory, and initialize the DMA machine */ + buf = dt3155_get_buf(dt3155_free_bufs); + if (!buf) { + printk(KERN_ERR "dt3155: dt3155_get_buf " + "(in dt3155_init_board) failed\n"); + return -ENOMEM; + } + buf->dma = pci_map_single(dev, buf->cpu, + DT3155_BUF_SIZE, PCI_DMA_FROMDEVICE); + if (pci_dma_mapping_error(dev, buf->dma)) { + printk(KERN_ERR "dt3155: pci_map_single failed\n"); + dt3155_put_buf(buf, dt3155_free_bufs); + 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); + + /* pci_unmap and deallocate memory */ + pci_unmap_single(dev, buf->dma, DT3155_BUF_SIZE, PCI_DMA_FROMDEVICE); + dt3155_put_buf(buf, dt3155_free_bufs); + 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 = V4L2_STD_ALL, + .current_norm = DT3155_CURRENT_NORM, +}; + +static int __devinit +dt3155_probe(struct pci_dev *dev, const struct pci_device_id *id) +{ + int err = -ENODEV; + struct dt3155_priv *pd; + + printk(KERN_INFO "dt3155: probe()\n"); + if (pci_set_dma_mask(dev, DMA_BIT_MASK(32))) { + printk(KERN_ERR "dt3155: cannot set dma_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 vdp 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; + } + 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"); + 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"); + dt3155_chunks = dt3155_init_chunks_fifo(); + if (!dt3155_chunks) { + err = -ENOMEM; + printk(KERN_ERR "dt3155: cannot init dt3155_chunks_fifo\n"); + goto err_init_chunks_fifo; + } + dt3155_free_bufs = dt3155_init_ibufs_fifo(dt3155_chunks, + DT3155_BUF_SIZE); + if (!dt3155_free_bufs) { + err = -ENOMEM; + printk(KERN_ERR "dt3155: cannot dt3155_init_ibufs_fifo\n"); + goto err_init_ibufs_fifo; + } + dt3155_alloc_bufs = dt3155_init_fifo(); + if (!dt3155_alloc_bufs) { + err = -ENOMEM; + printk(KERN_ERR "dt3155: cannot dt3155_init_fifo\n"); + goto err_init_fifo; + } + err = pci_register_driver(&pci_driver); + if (err) { + printk(KERN_ERR "dt3155: cannot register pci_driver\n"); + goto err_register_driver; + } + return 0; /* succes */ +err_register_driver: + dt3155_free_fifo(dt3155_alloc_bufs); +err_init_fifo: + dt3155_free_ibufs_fifo(dt3155_free_bufs); +err_init_ibufs_fifo: + dt3155_free_chunks_fifo(dt3155_chunks); +err_init_chunks_fifo: + return err; +} + +static void __exit +dt3155_exit_module(void) +{ + pci_unregister_driver(&pci_driver); + dt3155_free_fifo(dt3155_alloc_bufs); + dt3155_free_ibufs_fifo(dt3155_free_bufs); + dt3155_free_chunks_fifo(dt3155_chunks); + 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"); diff -uN a/drivers/staging/dt3155v4l/dt3155v4l.h b/drivers/staging/dt3155v4l/dt3155v4l.h --- a/drivers/staging/dt3155v4l/dt3155v4l.h 1970-01-01 02:00:00.000000000 +0200 +++ b/drivers/staging/dt3155v4l/dt3155v4l.h 2010-04-30 16:20:56.000000000 +0300 @@ -0,0 +1,220 @@ +/*************************************************************************** + * 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. * + ***************************************************************************/ + +/* DT3155 header file */ +#ifndef _DT3155_H_ +#define _DT3155_H_ + +#ifdef __KERNEL__ + +#include <linux/pci.h> +#include <linux/interrupt.h> + +#define DT3155_NAME "dt3155" +#define DT3155_VER_MAJ 1 +#define DT3155_VER_MIN 0 +#define DT3155_VER_EXT 2 +#define DT3155_VERSION __stringify(DT3155_VER_MAJ) "." \ + __stringify(DT3155_VER_MIN) "." \ + __stringify(DT3155_VER_EXT) + +/* DT3155 Base Register offsets (memory mapped) */ +#define EVEN_DMA_START 0x00 +#define ODD_DMA_START 0x0C +#define EVEN_DMA_STRIDE 0x18 +#define ODD_DMA_STRIDE 0x24 +#define EVEN_PIXEL_FMT 0x30 +#define ODD_PIXEL_FMT 0x34 +#define FIFO_TRIGER 0x38 +#define XFER_MODE 0x3C +#define CSR1 0x40 +#define RETRY_WAIT_CNT 0x44 +#define INT_CSR 0x48 +#define EVEN_FLD_MASK 0x4C +#define ODD_FLD_MASK 0x50 +#define MASK_LENGTH 0x54 +#define FIFO_FLAG_CNT 0x58 +#define IIC_CLK_DUR 0x5C +#define IIC_CSR1 0x60 +#define IIC_CSR2 0x64 + +/* DT3155 Internal Registers indexes (i2c/IIC mapped) */ +#define CSR2 0x10 +#define EVEN_CSR 0x11 +#define ODD_CSR 0x12 +#define CONFIG 0x13 +#define DT_ID 0x1F +#define X_CLIP_START 0x20 +#define Y_CLIP_START 0x22 +#define X_CLIP_END 0x24 +#define Y_CLIP_END 0x26 +#define AD_ADDR 0x30 +#define AD_LUT 0x31 +#define AD_CMD 0x32 +#define DIG_OUT 0x40 +#define PM_LUT_ADDR 0x50 +#define PM_LUT_DATA 0x51 + +/* AD command register values */ +#define AD_CMD_REG 0x00 +#define AD_POS_REF 0x01 +#define AD_NEG_REF 0x02 + +/* CSR1 bit masks */ +#define CRPT_DIS 0x00004000 +#define FLD_CRPT_ODD 0x00000200 +#define FLD_CRPT_EVEN 0x00000100 +#define FIFO_EN 0x00000080 +#define SRST 0x00000040 +#define FLD_DN_ODD 0x00000020 +#define FLD_DN_EVEN 0x00000010 +/* These should not be used. + * Use CAP_CONT_ODD/EVEN instead +#define CAP_SNGL_ODD 0x00000008 +#define CAP_SNGL_EVEN 0x00000004 +*/ +#define CAP_CONT_ODD 0x00000002 +#define CAP_CONT_EVEN 0x00000001 + +/* INT_CSR bit masks */ +#define FLD_START_EN 0x00000400 +#define FLD_END_ODD_EN 0x00000200 +#define FLD_END_EVEN_EN 0x00000100 +#define FLD_START 0x00000004 +#define FLD_END_ODD 0x00000002 +#define FLD_END_EVEN 0x00000001 + +/* IIC_CSR1 bit masks */ +#define DIRECT_ABORT 0x00000200 + +/* IIC_CSR2 bit masks */ +#define NEW_CYCLE 0x01000000 +#define DIR_RD 0x00010000 +#define IIC_READ 0x01010000 +#define IIC_WRITE 0x01000000 + +/* CSR2 bit masks */ +#define DISP_PASS 0x40 +#define BUSY_ODD 0x20 +#define BUSY_EVEN 0x10 +#define SYNC_PRESENT 0x08 +#define VT_50HZ 0x04 +#define SYNC_SNTL 0x02 +#define CHROM_FILT 0x01 +#define VT_60HZ 0x00 + +/* CSR_EVEN/ODD bit masks */ +#define CSR_ERROR 0x04 +#define CSR_SNGL 0x02 +#define CSR_DONE 0x01 + +/* CONFIG bit masks */ +#define PM_LUT_PGM 0x80 +#define PM_LUT_SEL 0x40 +#define CLIP_EN 0x20 +#define HSCALE_EN 0x10 +#define EXT_TRIG_UP 0x0C +#define EXT_TRIG_DOWN 0x04 +#define ACQ_MODE_NEXT 0x02 +#define ACQ_MODE_ODD 0x01 +#define ACQ_MODE_EVEN 0x00 + +/* AD_CMD bit masks */ +#define VIDEO_CNL_1 0x00 +#define VIDEO_CNL_2 0x40 +#define VIDEO_CNL_3 0x80 +#define VIDEO_CNL_4 0xC0 +#define SYNC_CNL_1 0x00 +#define SYNC_CNL_2 0x10 +#define SYNC_CNL_3 0x20 +#define SYNC_CNL_4 0x30 +#define SYNC_LVL_1 0x00 +#define SYNC_LVL_2 0x04 +#define SYNC_LVL_3 0x08 +#define SYNC_LVL_4 0x0C + +/* DT3155 identificator */ +#define DT3155_ID 0x20 + +#ifdef CONFIG_DT3155_CCIR +#define DMA_STRIDE 768 +#else +#define DMA_STRIDE 640 +#endif + +/** + * struct dt3155_stats - statistics structure + * + * @free_bufs_empty: no free image buffers + * @corrupted_fields: corrupted fields + * @dma_map_failed: dma mapping failed + * @start_before_end: new started before old ended + */ +struct dt3155_stats { + int free_bufs_empty; + int corrupted_fields; + int dma_map_failed; + int start_before_end; +}; + +/* per board private data structure */ +/** + * struct dt3155_priv - private data structure + * + * @vdev: pointer to video_device structure + * @acq_fp pointer to filp that starts acquisition + * @pdev: pointer to pci_dev structure + * @vidq pointer to videobuf_queue structure + * @curr_buf: pointer to curren buffer + * @thread pointer to worker thraed + * @irq_handler: irq handler for the driver + * @dmaq queue for dma buffers + * @do_dma wait queue of the kernel thread + * @mux: mutex to protect the instance + * @lock spinlock for videobuf queues + * @field_count fields counter + * @stats: statistics structure + * @users open count + * @regs: local copy of mmio base register + * @csr2: local copy of csr2 register + * @config: local copy of config register + */ +struct dt3155_priv { + struct video_device *vdev; + struct file *acq_fp; + struct pci_dev *pdev; + struct videobuf_queue *vidq; + struct videobuf_buffer *curr_buf; + struct task_struct *thread; + irq_handler_t irq_handler; + struct list_head dmaq; + wait_queue_head_t do_dma; + struct mutex mux; + spinlock_t lock; + unsigned int field_count; + struct dt3155_stats stats; + void *regs; + int users; + u8 csr2, config; +}; + +#endif /* __KERNEL__ */ + +#endif /* _DT3155_H_ */ --- a/drivers/staging/Kconfig.orig 2010-03-20 18:11:30.000000000 +0200 +++ a/drivers/staging/Kconfig 2010-03-20 18:12:23.000000000 +0200 @@ -137,6 +137,8 @@ source "drivers/staging/dt3155/Kconfig" +source "drivers/staging/dt3155v4l/Kconfig" + source "drivers/staging/crystalhd/Kconfig" endif # !STAGING_EXCLUDE_BUILD ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [RFC] Yet another (third) dt3155 driver PCI/video4linux compliant 2010-04-30 15:36 ` Marin Mitov @ 2010-05-01 17:58 ` Greg KH 2010-05-02 4:29 ` Marin Mitov 0 siblings, 1 reply; 7+ messages in thread From: Greg KH @ 2010-05-01 17:58 UTC (permalink / raw) To: Marin Mitov; +Cc: Scott Smedley, linux-kernel, Mauro Carvalho Chehab On Fri, Apr 30, 2010 at 06:36:09PM +0300, Marin Mitov wrote: > > I like it, want me to apply it? > > Thank you for liking it. Since the time I sent the patch much in the driver has changed. > Now it works (tested only with xawtv -f) with read(), as well as mmap(), but see below > for the problems. > > Now I send you an updated patch, but it is not reviewed. You could either review it :-) or > apply the previous patch. In the last case I will prepare a difference patch and will send it. This one worked for me, with the exception that you forgot to modify the drivers/staging/Makefile file to add the driver to the build. I've fixed that up, and it builds on my i386 box, so I've added it to my tree. thanks, greg k-h ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [RFC] Yet another (third) dt3155 driver PCI/video4linux compliant 2010-05-01 17:58 ` Greg KH @ 2010-05-02 4:29 ` Marin Mitov 0 siblings, 0 replies; 7+ messages in thread From: Marin Mitov @ 2010-05-02 4:29 UTC (permalink / raw) To: Greg KH; +Cc: Scott Smedley, linux-kernel, Mauro Carvalho Chehab On Saturday 01 May 2010 08:58:53 pm Greg KH wrote: > On Fri, Apr 30, 2010 at 06:36:09PM +0300, Marin Mitov wrote: > > > I like it, want me to apply it? > > > > Thank you for liking it. Since the time I sent the patch much in the driver has changed. > > Now it works (tested only with xawtv -f) with read(), as well as mmap(), but see below > > for the problems. > > > > Now I send you an updated patch, but it is not reviewed. You could either review it :-) or > > apply the previous patch. In the last case I will prepare a difference patch and will send it. > > This one worked for me, with the exception that you forgot to modify the > drivers/staging/Makefile file to add the driver to the build. I've > fixed that up, and it builds on my i386 box, so I've added it to my > tree. Yes, this is my fault, sorry, and thank you. Marin Mitov > > thanks, > > greg k-h > ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2010-05-02 4:32 UTC | newest] Thread overview: 7+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2010-03-20 9:18 [RFC] Yet another (third) dt3155 driver PCI/video4linux compliant Marin Mitov 2010-03-20 13:01 ` Greg KH 2010-03-20 19:40 ` Marin Mitov 2010-04-27 23:18 ` Greg KH 2010-04-30 15:36 ` Marin Mitov 2010-05-01 17:58 ` Greg KH 2010-05-02 4:29 ` Marin Mitov
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