![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
1528 lines
42 KiB
C
1528 lines
42 KiB
C
/*
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* video1394.c - video driver for OHCI 1394 boards
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* Copyright (C)1999,2000 Sebastien Rougeaux <sebastien.rougeaux@anu.edu.au>
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* Peter Schlaile <udbz@rz.uni-karlsruhe.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* NOTES:
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*
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* jds -- add private data to file to keep track of iso contexts associated
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* with each open -- so release won't kill all iso transfers.
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*
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* Damien Douxchamps: Fix failure when the number of DMA pages per frame is
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* one.
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*
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* ioctl return codes:
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* EFAULT is only for invalid address for the argp
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* EINVAL for out of range values
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* EBUSY when trying to use an already used resource
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* ESRCH when trying to free/stop a not used resource
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* EAGAIN for resource allocation failure that could perhaps succeed later
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* ENOTTY for unsupported ioctl request
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*
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*/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/wait.h>
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#include <linux/errno.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <linux/fs.h>
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#include <linux/poll.h>
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#include <linux/smp_lock.h>
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#include <linux/delay.h>
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#include <linux/devfs_fs_kernel.h>
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#include <linux/bitops.h>
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#include <linux/types.h>
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#include <linux/vmalloc.h>
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#include <linux/timex.h>
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#include <linux/mm.h>
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#include <linux/ioctl32.h>
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#include <linux/compat.h>
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#include <linux/cdev.h>
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#include "ieee1394.h"
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#include "ieee1394_types.h"
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#include "hosts.h"
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#include "ieee1394_core.h"
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#include "highlevel.h"
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#include "video1394.h"
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#include "nodemgr.h"
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#include "dma.h"
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#include "ohci1394.h"
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#define ISO_CHANNELS 64
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#ifndef virt_to_page
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#define virt_to_page(x) MAP_NR(x)
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#endif
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#ifndef vmalloc_32
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#define vmalloc_32(x) vmalloc(x)
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#endif
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struct it_dma_prg {
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struct dma_cmd begin;
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quadlet_t data[4];
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struct dma_cmd end;
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quadlet_t pad[4]; /* FIXME: quick hack for memory alignment */
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};
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struct dma_iso_ctx {
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struct ti_ohci *ohci;
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int type; /* OHCI_ISO_TRANSMIT or OHCI_ISO_RECEIVE */
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struct ohci1394_iso_tasklet iso_tasklet;
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int channel;
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int ctx;
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int last_buffer;
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int * next_buffer; /* For ISO Transmit of video packets
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to write the correct SYT field
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into the next block */
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unsigned int num_desc;
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unsigned int buf_size;
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unsigned int frame_size;
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unsigned int packet_size;
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unsigned int left_size;
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unsigned int nb_cmd;
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struct dma_region dma;
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struct dma_prog_region *prg_reg;
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struct dma_cmd **ir_prg;
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struct it_dma_prg **it_prg;
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unsigned int *buffer_status;
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struct timeval *buffer_time; /* time when the buffer was received */
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unsigned int *last_used_cmd; /* For ISO Transmit with
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variable sized packets only ! */
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int ctrlClear;
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int ctrlSet;
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int cmdPtr;
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int ctxMatch;
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wait_queue_head_t waitq;
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spinlock_t lock;
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unsigned int syt_offset;
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int flags;
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struct list_head link;
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};
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struct file_ctx {
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struct ti_ohci *ohci;
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struct list_head context_list;
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struct dma_iso_ctx *current_ctx;
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};
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#ifdef CONFIG_IEEE1394_VERBOSEDEBUG
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#define VIDEO1394_DEBUG
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#endif
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#ifdef DBGMSG
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#undef DBGMSG
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#endif
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#ifdef VIDEO1394_DEBUG
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#define DBGMSG(card, fmt, args...) \
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printk(KERN_INFO "video1394_%d: " fmt "\n" , card , ## args)
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#else
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#define DBGMSG(card, fmt, args...)
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#endif
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/* print general (card independent) information */
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#define PRINT_G(level, fmt, args...) \
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printk(level "video1394: " fmt "\n" , ## args)
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/* print card specific information */
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#define PRINT(level, card, fmt, args...) \
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printk(level "video1394_%d: " fmt "\n" , card , ## args)
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static void wakeup_dma_ir_ctx(unsigned long l);
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static void wakeup_dma_it_ctx(unsigned long l);
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static struct hpsb_highlevel video1394_highlevel;
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static int free_dma_iso_ctx(struct dma_iso_ctx *d)
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{
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int i;
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DBGMSG(d->ohci->host->id, "Freeing dma_iso_ctx %d", d->ctx);
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ohci1394_stop_context(d->ohci, d->ctrlClear, NULL);
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if (d->iso_tasklet.link.next != NULL)
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ohci1394_unregister_iso_tasklet(d->ohci, &d->iso_tasklet);
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dma_region_free(&d->dma);
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if (d->prg_reg) {
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for (i = 0; i < d->num_desc; i++)
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dma_prog_region_free(&d->prg_reg[i]);
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kfree(d->prg_reg);
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}
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if (d->ir_prg)
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kfree(d->ir_prg);
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if (d->it_prg)
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kfree(d->it_prg);
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if (d->buffer_status)
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kfree(d->buffer_status);
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if (d->buffer_time)
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kfree(d->buffer_time);
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if (d->last_used_cmd)
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kfree(d->last_used_cmd);
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if (d->next_buffer)
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kfree(d->next_buffer);
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list_del(&d->link);
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kfree(d);
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return 0;
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}
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static struct dma_iso_ctx *
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alloc_dma_iso_ctx(struct ti_ohci *ohci, int type, int num_desc,
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int buf_size, int channel, unsigned int packet_size)
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{
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struct dma_iso_ctx *d;
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int i;
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d = kmalloc(sizeof(struct dma_iso_ctx), GFP_KERNEL);
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if (d == NULL) {
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PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma_iso_ctx");
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return NULL;
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}
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memset(d, 0, sizeof *d);
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d->ohci = ohci;
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d->type = type;
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d->channel = channel;
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d->num_desc = num_desc;
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d->frame_size = buf_size;
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d->buf_size = PAGE_ALIGN(buf_size);
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d->last_buffer = -1;
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INIT_LIST_HEAD(&d->link);
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init_waitqueue_head(&d->waitq);
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/* Init the regions for easy cleanup */
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dma_region_init(&d->dma);
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if (dma_region_alloc(&d->dma, d->num_desc * d->buf_size, ohci->dev,
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PCI_DMA_BIDIRECTIONAL)) {
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PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma buffer");
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free_dma_iso_ctx(d);
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return NULL;
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}
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if (type == OHCI_ISO_RECEIVE)
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ohci1394_init_iso_tasklet(&d->iso_tasklet, type,
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wakeup_dma_ir_ctx,
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(unsigned long) d);
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else
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ohci1394_init_iso_tasklet(&d->iso_tasklet, type,
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wakeup_dma_it_ctx,
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(unsigned long) d);
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if (ohci1394_register_iso_tasklet(ohci, &d->iso_tasklet) < 0) {
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PRINT(KERN_ERR, ohci->host->id, "no free iso %s contexts",
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type == OHCI_ISO_RECEIVE ? "receive" : "transmit");
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free_dma_iso_ctx(d);
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return NULL;
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}
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d->ctx = d->iso_tasklet.context;
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d->prg_reg = kmalloc(d->num_desc * sizeof(struct dma_prog_region),
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GFP_KERNEL);
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if (d->prg_reg == NULL) {
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PRINT(KERN_ERR, ohci->host->id, "Failed to allocate ir prg regs");
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free_dma_iso_ctx(d);
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return NULL;
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}
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/* Makes for easier cleanup */
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for (i = 0; i < d->num_desc; i++)
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dma_prog_region_init(&d->prg_reg[i]);
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if (type == OHCI_ISO_RECEIVE) {
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d->ctrlSet = OHCI1394_IsoRcvContextControlSet+32*d->ctx;
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d->ctrlClear = OHCI1394_IsoRcvContextControlClear+32*d->ctx;
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d->cmdPtr = OHCI1394_IsoRcvCommandPtr+32*d->ctx;
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d->ctxMatch = OHCI1394_IsoRcvContextMatch+32*d->ctx;
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d->ir_prg = kmalloc(d->num_desc * sizeof(struct dma_cmd *),
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GFP_KERNEL);
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if (d->ir_prg == NULL) {
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PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma ir prg");
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free_dma_iso_ctx(d);
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return NULL;
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}
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memset(d->ir_prg, 0, d->num_desc * sizeof(struct dma_cmd *));
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d->nb_cmd = d->buf_size / PAGE_SIZE + 1;
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d->left_size = (d->frame_size % PAGE_SIZE) ?
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d->frame_size % PAGE_SIZE : PAGE_SIZE;
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for (i = 0;i < d->num_desc; i++) {
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if (dma_prog_region_alloc(&d->prg_reg[i], d->nb_cmd *
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sizeof(struct dma_cmd), ohci->dev)) {
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PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma ir prg");
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free_dma_iso_ctx(d);
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return NULL;
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}
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d->ir_prg[i] = (struct dma_cmd *)d->prg_reg[i].kvirt;
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}
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} else { /* OHCI_ISO_TRANSMIT */
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d->ctrlSet = OHCI1394_IsoXmitContextControlSet+16*d->ctx;
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d->ctrlClear = OHCI1394_IsoXmitContextControlClear+16*d->ctx;
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d->cmdPtr = OHCI1394_IsoXmitCommandPtr+16*d->ctx;
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d->it_prg = kmalloc(d->num_desc * sizeof(struct it_dma_prg *),
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GFP_KERNEL);
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if (d->it_prg == NULL) {
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PRINT(KERN_ERR, ohci->host->id,
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"Failed to allocate dma it prg");
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free_dma_iso_ctx(d);
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return NULL;
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}
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memset(d->it_prg, 0, d->num_desc*sizeof(struct it_dma_prg *));
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d->packet_size = packet_size;
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if (PAGE_SIZE % packet_size || packet_size>4096) {
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PRINT(KERN_ERR, ohci->host->id,
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"Packet size %d (page_size: %ld) "
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"not yet supported\n",
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packet_size, PAGE_SIZE);
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free_dma_iso_ctx(d);
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return NULL;
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}
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d->nb_cmd = d->frame_size / d->packet_size;
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if (d->frame_size % d->packet_size) {
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d->nb_cmd++;
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d->left_size = d->frame_size % d->packet_size;
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} else
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d->left_size = d->packet_size;
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for (i = 0; i < d->num_desc; i++) {
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if (dma_prog_region_alloc(&d->prg_reg[i], d->nb_cmd *
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sizeof(struct it_dma_prg), ohci->dev)) {
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PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma it prg");
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free_dma_iso_ctx(d);
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return NULL;
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}
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d->it_prg[i] = (struct it_dma_prg *)d->prg_reg[i].kvirt;
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}
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}
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d->buffer_status = kmalloc(d->num_desc * sizeof(unsigned int),
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GFP_KERNEL);
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d->buffer_time = kmalloc(d->num_desc * sizeof(struct timeval),
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GFP_KERNEL);
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d->last_used_cmd = kmalloc(d->num_desc * sizeof(unsigned int),
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GFP_KERNEL);
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d->next_buffer = kmalloc(d->num_desc * sizeof(int),
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GFP_KERNEL);
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if (d->buffer_status == NULL) {
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PRINT(KERN_ERR, ohci->host->id, "Failed to allocate buffer_status");
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free_dma_iso_ctx(d);
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return NULL;
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}
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if (d->buffer_time == NULL) {
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PRINT(KERN_ERR, ohci->host->id, "Failed to allocate buffer_time");
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free_dma_iso_ctx(d);
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return NULL;
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}
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if (d->last_used_cmd == NULL) {
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PRINT(KERN_ERR, ohci->host->id, "Failed to allocate last_used_cmd");
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free_dma_iso_ctx(d);
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return NULL;
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}
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if (d->next_buffer == NULL) {
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PRINT(KERN_ERR, ohci->host->id, "Failed to allocate next_buffer");
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free_dma_iso_ctx(d);
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return NULL;
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}
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memset(d->buffer_status, 0, d->num_desc * sizeof(unsigned int));
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memset(d->buffer_time, 0, d->num_desc * sizeof(struct timeval));
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memset(d->last_used_cmd, 0, d->num_desc * sizeof(unsigned int));
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memset(d->next_buffer, -1, d->num_desc * sizeof(int));
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spin_lock_init(&d->lock);
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PRINT(KERN_INFO, ohci->host->id, "Iso %s DMA: %d buffers "
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"of size %d allocated for a frame size %d, each with %d prgs",
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(type == OHCI_ISO_RECEIVE) ? "receive" : "transmit",
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d->num_desc, d->buf_size, d->frame_size, d->nb_cmd);
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return d;
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}
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static void reset_ir_status(struct dma_iso_ctx *d, int n)
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{
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int i;
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d->ir_prg[n][0].status = cpu_to_le32(4);
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d->ir_prg[n][1].status = cpu_to_le32(PAGE_SIZE-4);
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for (i = 2; i < d->nb_cmd - 1; i++)
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d->ir_prg[n][i].status = cpu_to_le32(PAGE_SIZE);
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d->ir_prg[n][i].status = cpu_to_le32(d->left_size);
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}
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static void initialize_dma_ir_prg(struct dma_iso_ctx *d, int n, int flags)
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{
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struct dma_cmd *ir_prg = d->ir_prg[n];
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struct dma_prog_region *ir_reg = &d->prg_reg[n];
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unsigned long buf = (unsigned long)d->dma.kvirt + n * d->buf_size;
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int i;
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/* the first descriptor will read only 4 bytes */
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ir_prg[0].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
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DMA_CTL_BRANCH | 4);
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/* set the sync flag */
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if (flags & VIDEO1394_SYNC_FRAMES)
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ir_prg[0].control |= cpu_to_le32(DMA_CTL_WAIT);
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ir_prg[0].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma, buf -
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(unsigned long)d->dma.kvirt));
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ir_prg[0].branchAddress = cpu_to_le32((dma_prog_region_offset_to_bus(ir_reg,
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1 * sizeof(struct dma_cmd)) & 0xfffffff0) | 0x1);
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/* If there is *not* only one DMA page per frame (hence, d->nb_cmd==2) */
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if (d->nb_cmd > 2) {
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/* The second descriptor will read PAGE_SIZE-4 bytes */
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ir_prg[1].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
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DMA_CTL_BRANCH | (PAGE_SIZE-4));
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ir_prg[1].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma, (buf + 4) -
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(unsigned long)d->dma.kvirt));
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ir_prg[1].branchAddress = cpu_to_le32((dma_prog_region_offset_to_bus(ir_reg,
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2 * sizeof(struct dma_cmd)) & 0xfffffff0) | 0x1);
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for (i = 2; i < d->nb_cmd - 1; i++) {
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ir_prg[i].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
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DMA_CTL_BRANCH | PAGE_SIZE);
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ir_prg[i].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
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(buf+(i-1)*PAGE_SIZE) -
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(unsigned long)d->dma.kvirt));
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ir_prg[i].branchAddress =
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cpu_to_le32((dma_prog_region_offset_to_bus(ir_reg,
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(i + 1) * sizeof(struct dma_cmd)) & 0xfffffff0) | 0x1);
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}
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/* The last descriptor will generate an interrupt */
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ir_prg[i].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
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DMA_CTL_IRQ | DMA_CTL_BRANCH | d->left_size);
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ir_prg[i].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
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(buf+(i-1)*PAGE_SIZE) -
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(unsigned long)d->dma.kvirt));
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} else {
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/* Only one DMA page is used. Read d->left_size immediately and */
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/* generate an interrupt as this is also the last page. */
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ir_prg[1].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
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DMA_CTL_IRQ | DMA_CTL_BRANCH | (d->left_size-4));
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ir_prg[1].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
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(buf + 4) - (unsigned long)d->dma.kvirt));
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|
}
|
|
}
|
|
|
|
static void initialize_dma_ir_ctx(struct dma_iso_ctx *d, int tag, int flags)
|
|
{
|
|
struct ti_ohci *ohci = (struct ti_ohci *)d->ohci;
|
|
int i;
|
|
|
|
d->flags = flags;
|
|
|
|
ohci1394_stop_context(ohci, d->ctrlClear, NULL);
|
|
|
|
for (i=0;i<d->num_desc;i++) {
|
|
initialize_dma_ir_prg(d, i, flags);
|
|
reset_ir_status(d, i);
|
|
}
|
|
|
|
/* reset the ctrl register */
|
|
reg_write(ohci, d->ctrlClear, 0xf0000000);
|
|
|
|
/* Set bufferFill */
|
|
reg_write(ohci, d->ctrlSet, 0x80000000);
|
|
|
|
/* Set isoch header */
|
|
if (flags & VIDEO1394_INCLUDE_ISO_HEADERS)
|
|
reg_write(ohci, d->ctrlSet, 0x40000000);
|
|
|
|
/* Set the context match register to match on all tags,
|
|
sync for sync tag, and listen to d->channel */
|
|
reg_write(ohci, d->ctxMatch, 0xf0000000|((tag&0xf)<<8)|d->channel);
|
|
|
|
/* Set up isoRecvIntMask to generate interrupts */
|
|
reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, 1<<d->ctx);
|
|
}
|
|
|
|
/* find which context is listening to this channel */
|
|
static struct dma_iso_ctx *
|
|
find_ctx(struct list_head *list, int type, int channel)
|
|
{
|
|
struct dma_iso_ctx *ctx;
|
|
|
|
list_for_each_entry(ctx, list, link) {
|
|
if (ctx->type == type && ctx->channel == channel)
|
|
return ctx;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void wakeup_dma_ir_ctx(unsigned long l)
|
|
{
|
|
struct dma_iso_ctx *d = (struct dma_iso_ctx *) l;
|
|
int i;
|
|
|
|
spin_lock(&d->lock);
|
|
|
|
for (i = 0; i < d->num_desc; i++) {
|
|
if (d->ir_prg[i][d->nb_cmd-1].status & cpu_to_le32(0xFFFF0000)) {
|
|
reset_ir_status(d, i);
|
|
d->buffer_status[i] = VIDEO1394_BUFFER_READY;
|
|
do_gettimeofday(&d->buffer_time[i]);
|
|
}
|
|
}
|
|
|
|
spin_unlock(&d->lock);
|
|
|
|
if (waitqueue_active(&d->waitq))
|
|
wake_up_interruptible(&d->waitq);
|
|
}
|
|
|
|
static inline void put_timestamp(struct ti_ohci *ohci, struct dma_iso_ctx * d,
|
|
int n)
|
|
{
|
|
unsigned char* buf = d->dma.kvirt + n * d->buf_size;
|
|
u32 cycleTimer;
|
|
u32 timeStamp;
|
|
|
|
if (n == -1) {
|
|
return;
|
|
}
|
|
|
|
cycleTimer = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
|
|
|
|
timeStamp = ((cycleTimer & 0x0fff) + d->syt_offset); /* 11059 = 450 us */
|
|
timeStamp = (timeStamp % 3072 + ((timeStamp / 3072) << 12)
|
|
+ (cycleTimer & 0xf000)) & 0xffff;
|
|
|
|
buf[6] = timeStamp >> 8;
|
|
buf[7] = timeStamp & 0xff;
|
|
|
|
/* if first packet is empty packet, then put timestamp into the next full one too */
|
|
if ( (le32_to_cpu(d->it_prg[n][0].data[1]) >>16) == 0x008) {
|
|
buf += d->packet_size;
|
|
buf[6] = timeStamp >> 8;
|
|
buf[7] = timeStamp & 0xff;
|
|
}
|
|
|
|
/* do the next buffer frame too in case of irq latency */
|
|
n = d->next_buffer[n];
|
|
if (n == -1) {
|
|
return;
|
|
}
|
|
buf = d->dma.kvirt + n * d->buf_size;
|
|
|
|
timeStamp += (d->last_used_cmd[n] << 12) & 0xffff;
|
|
|
|
buf[6] = timeStamp >> 8;
|
|
buf[7] = timeStamp & 0xff;
|
|
|
|
/* if first packet is empty packet, then put timestamp into the next full one too */
|
|
if ( (le32_to_cpu(d->it_prg[n][0].data[1]) >>16) == 0x008) {
|
|
buf += d->packet_size;
|
|
buf[6] = timeStamp >> 8;
|
|
buf[7] = timeStamp & 0xff;
|
|
}
|
|
|
|
#if 0
|
|
printk("curr: %d, next: %d, cycleTimer: %08x timeStamp: %08x\n",
|
|
curr, n, cycleTimer, timeStamp);
|
|
#endif
|
|
}
|
|
|
|
static void wakeup_dma_it_ctx(unsigned long l)
|
|
{
|
|
struct dma_iso_ctx *d = (struct dma_iso_ctx *) l;
|
|
struct ti_ohci *ohci = d->ohci;
|
|
int i;
|
|
|
|
spin_lock(&d->lock);
|
|
|
|
for (i = 0; i < d->num_desc; i++) {
|
|
if (d->it_prg[i][d->last_used_cmd[i]].end.status &
|
|
cpu_to_le32(0xFFFF0000)) {
|
|
int next = d->next_buffer[i];
|
|
put_timestamp(ohci, d, next);
|
|
d->it_prg[i][d->last_used_cmd[i]].end.status = 0;
|
|
d->buffer_status[i] = VIDEO1394_BUFFER_READY;
|
|
}
|
|
}
|
|
|
|
spin_unlock(&d->lock);
|
|
|
|
if (waitqueue_active(&d->waitq))
|
|
wake_up_interruptible(&d->waitq);
|
|
}
|
|
|
|
static void initialize_dma_it_prg(struct dma_iso_ctx *d, int n, int sync_tag)
|
|
{
|
|
struct it_dma_prg *it_prg = d->it_prg[n];
|
|
struct dma_prog_region *it_reg = &d->prg_reg[n];
|
|
unsigned long buf = (unsigned long)d->dma.kvirt + n * d->buf_size;
|
|
int i;
|
|
d->last_used_cmd[n] = d->nb_cmd - 1;
|
|
for (i=0;i<d->nb_cmd;i++) {
|
|
|
|
it_prg[i].begin.control = cpu_to_le32(DMA_CTL_OUTPUT_MORE |
|
|
DMA_CTL_IMMEDIATE | 8) ;
|
|
it_prg[i].begin.address = 0;
|
|
|
|
it_prg[i].begin.status = 0;
|
|
|
|
it_prg[i].data[0] = cpu_to_le32(
|
|
(IEEE1394_SPEED_100 << 16)
|
|
| (/* tag */ 1 << 14)
|
|
| (d->channel << 8)
|
|
| (TCODE_ISO_DATA << 4));
|
|
if (i==0) it_prg[i].data[0] |= cpu_to_le32(sync_tag);
|
|
it_prg[i].data[1] = cpu_to_le32(d->packet_size << 16);
|
|
it_prg[i].data[2] = 0;
|
|
it_prg[i].data[3] = 0;
|
|
|
|
it_prg[i].end.control = cpu_to_le32(DMA_CTL_OUTPUT_LAST |
|
|
DMA_CTL_BRANCH);
|
|
it_prg[i].end.address =
|
|
cpu_to_le32(dma_region_offset_to_bus(&d->dma, (buf+i*d->packet_size) -
|
|
(unsigned long)d->dma.kvirt));
|
|
|
|
if (i<d->nb_cmd-1) {
|
|
it_prg[i].end.control |= cpu_to_le32(d->packet_size);
|
|
it_prg[i].begin.branchAddress =
|
|
cpu_to_le32((dma_prog_region_offset_to_bus(it_reg, (i + 1) *
|
|
sizeof(struct it_dma_prg)) & 0xfffffff0) | 0x3);
|
|
it_prg[i].end.branchAddress =
|
|
cpu_to_le32((dma_prog_region_offset_to_bus(it_reg, (i + 1) *
|
|
sizeof(struct it_dma_prg)) & 0xfffffff0) | 0x3);
|
|
} else {
|
|
/* the last prg generates an interrupt */
|
|
it_prg[i].end.control |= cpu_to_le32(DMA_CTL_UPDATE |
|
|
DMA_CTL_IRQ | d->left_size);
|
|
/* the last prg doesn't branch */
|
|
it_prg[i].begin.branchAddress = 0;
|
|
it_prg[i].end.branchAddress = 0;
|
|
}
|
|
it_prg[i].end.status = 0;
|
|
}
|
|
}
|
|
|
|
static void initialize_dma_it_prg_var_packet_queue(
|
|
struct dma_iso_ctx *d, int n, unsigned int * packet_sizes,
|
|
struct ti_ohci *ohci)
|
|
{
|
|
struct it_dma_prg *it_prg = d->it_prg[n];
|
|
struct dma_prog_region *it_reg = &d->prg_reg[n];
|
|
int i;
|
|
|
|
#if 0
|
|
if (n != -1) {
|
|
put_timestamp(ohci, d, n);
|
|
}
|
|
#endif
|
|
d->last_used_cmd[n] = d->nb_cmd - 1;
|
|
|
|
for (i = 0; i < d->nb_cmd; i++) {
|
|
unsigned int size;
|
|
if (packet_sizes[i] > d->packet_size) {
|
|
size = d->packet_size;
|
|
} else {
|
|
size = packet_sizes[i];
|
|
}
|
|
it_prg[i].data[1] = cpu_to_le32(size << 16);
|
|
it_prg[i].end.control = cpu_to_le32(DMA_CTL_OUTPUT_LAST | DMA_CTL_BRANCH);
|
|
|
|
if (i < d->nb_cmd-1 && packet_sizes[i+1] != 0) {
|
|
it_prg[i].end.control |= cpu_to_le32(size);
|
|
it_prg[i].begin.branchAddress =
|
|
cpu_to_le32((dma_prog_region_offset_to_bus(it_reg, (i + 1) *
|
|
sizeof(struct it_dma_prg)) & 0xfffffff0) | 0x3);
|
|
it_prg[i].end.branchAddress =
|
|
cpu_to_le32((dma_prog_region_offset_to_bus(it_reg, (i + 1) *
|
|
sizeof(struct it_dma_prg)) & 0xfffffff0) | 0x3);
|
|
} else {
|
|
/* the last prg generates an interrupt */
|
|
it_prg[i].end.control |= cpu_to_le32(DMA_CTL_UPDATE |
|
|
DMA_CTL_IRQ | size);
|
|
/* the last prg doesn't branch */
|
|
it_prg[i].begin.branchAddress = 0;
|
|
it_prg[i].end.branchAddress = 0;
|
|
d->last_used_cmd[n] = i;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void initialize_dma_it_ctx(struct dma_iso_ctx *d, int sync_tag,
|
|
unsigned int syt_offset, int flags)
|
|
{
|
|
struct ti_ohci *ohci = (struct ti_ohci *)d->ohci;
|
|
int i;
|
|
|
|
d->flags = flags;
|
|
d->syt_offset = (syt_offset == 0 ? 11000 : syt_offset);
|
|
|
|
ohci1394_stop_context(ohci, d->ctrlClear, NULL);
|
|
|
|
for (i=0;i<d->num_desc;i++)
|
|
initialize_dma_it_prg(d, i, sync_tag);
|
|
|
|
/* Set up isoRecvIntMask to generate interrupts */
|
|
reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1<<d->ctx);
|
|
}
|
|
|
|
static inline unsigned video1394_buffer_state(struct dma_iso_ctx *d,
|
|
unsigned int buffer)
|
|
{
|
|
unsigned long flags;
|
|
unsigned int ret;
|
|
spin_lock_irqsave(&d->lock, flags);
|
|
ret = d->buffer_status[buffer];
|
|
spin_unlock_irqrestore(&d->lock, flags);
|
|
return ret;
|
|
}
|
|
|
|
static int __video1394_ioctl(struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct file_ctx *ctx = (struct file_ctx *)file->private_data;
|
|
struct ti_ohci *ohci = ctx->ohci;
|
|
unsigned long flags;
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
switch(cmd)
|
|
{
|
|
case VIDEO1394_IOC_LISTEN_CHANNEL:
|
|
case VIDEO1394_IOC_TALK_CHANNEL:
|
|
{
|
|
struct video1394_mmap v;
|
|
u64 mask;
|
|
struct dma_iso_ctx *d;
|
|
int i;
|
|
|
|
if (copy_from_user(&v, argp, sizeof(v)))
|
|
return -EFAULT;
|
|
|
|
/* if channel < 0, find lowest available one */
|
|
if (v.channel < 0) {
|
|
mask = (u64)0x1;
|
|
for (i=0; ; i++) {
|
|
if (i == ISO_CHANNELS) {
|
|
PRINT(KERN_ERR, ohci->host->id,
|
|
"No free channel found");
|
|
return EAGAIN;
|
|
}
|
|
if (!(ohci->ISO_channel_usage & mask)) {
|
|
v.channel = i;
|
|
PRINT(KERN_INFO, ohci->host->id, "Found free channel %d", i);
|
|
break;
|
|
}
|
|
mask = mask << 1;
|
|
}
|
|
} else if (v.channel >= ISO_CHANNELS) {
|
|
PRINT(KERN_ERR, ohci->host->id,
|
|
"Iso channel %d out of bounds", v.channel);
|
|
return -EINVAL;
|
|
} else {
|
|
mask = (u64)0x1<<v.channel;
|
|
}
|
|
PRINT(KERN_INFO, ohci->host->id, "mask: %08X%08X usage: %08X%08X\n",
|
|
(u32)(mask>>32),(u32)(mask&0xffffffff),
|
|
(u32)(ohci->ISO_channel_usage>>32),
|
|
(u32)(ohci->ISO_channel_usage&0xffffffff));
|
|
if (ohci->ISO_channel_usage & mask) {
|
|
PRINT(KERN_ERR, ohci->host->id,
|
|
"Channel %d is already taken", v.channel);
|
|
return -EBUSY;
|
|
}
|
|
|
|
if (v.buf_size == 0 || v.buf_size > VIDEO1394_MAX_SIZE) {
|
|
PRINT(KERN_ERR, ohci->host->id,
|
|
"Invalid %d length buffer requested",v.buf_size);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (v.nb_buffers == 0 || v.nb_buffers > VIDEO1394_MAX_SIZE) {
|
|
PRINT(KERN_ERR, ohci->host->id,
|
|
"Invalid %d buffers requested",v.nb_buffers);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (v.nb_buffers * v.buf_size > VIDEO1394_MAX_SIZE) {
|
|
PRINT(KERN_ERR, ohci->host->id,
|
|
"%d buffers of size %d bytes is too big",
|
|
v.nb_buffers, v.buf_size);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (cmd == VIDEO1394_IOC_LISTEN_CHANNEL) {
|
|
d = alloc_dma_iso_ctx(ohci, OHCI_ISO_RECEIVE,
|
|
v.nb_buffers, v.buf_size,
|
|
v.channel, 0);
|
|
|
|
if (d == NULL) {
|
|
PRINT(KERN_ERR, ohci->host->id,
|
|
"Couldn't allocate ir context");
|
|
return -EAGAIN;
|
|
}
|
|
initialize_dma_ir_ctx(d, v.sync_tag, v.flags);
|
|
|
|
ctx->current_ctx = d;
|
|
|
|
v.buf_size = d->buf_size;
|
|
list_add_tail(&d->link, &ctx->context_list);
|
|
|
|
PRINT(KERN_INFO, ohci->host->id,
|
|
"iso context %d listen on channel %d",
|
|
d->ctx, v.channel);
|
|
}
|
|
else {
|
|
d = alloc_dma_iso_ctx(ohci, OHCI_ISO_TRANSMIT,
|
|
v.nb_buffers, v.buf_size,
|
|
v.channel, v.packet_size);
|
|
|
|
if (d == NULL) {
|
|
PRINT(KERN_ERR, ohci->host->id,
|
|
"Couldn't allocate it context");
|
|
return -EAGAIN;
|
|
}
|
|
initialize_dma_it_ctx(d, v.sync_tag,
|
|
v.syt_offset, v.flags);
|
|
|
|
ctx->current_ctx = d;
|
|
|
|
v.buf_size = d->buf_size;
|
|
|
|
list_add_tail(&d->link, &ctx->context_list);
|
|
|
|
PRINT(KERN_INFO, ohci->host->id,
|
|
"Iso context %d talk on channel %d", d->ctx,
|
|
v.channel);
|
|
}
|
|
|
|
if (copy_to_user((void *)arg, &v, sizeof(v))) {
|
|
/* FIXME : free allocated dma resources */
|
|
return -EFAULT;
|
|
}
|
|
|
|
ohci->ISO_channel_usage |= mask;
|
|
|
|
return 0;
|
|
}
|
|
case VIDEO1394_IOC_UNLISTEN_CHANNEL:
|
|
case VIDEO1394_IOC_UNTALK_CHANNEL:
|
|
{
|
|
int channel;
|
|
u64 mask;
|
|
struct dma_iso_ctx *d;
|
|
|
|
if (copy_from_user(&channel, argp, sizeof(int)))
|
|
return -EFAULT;
|
|
|
|
if (channel < 0 || channel >= ISO_CHANNELS) {
|
|
PRINT(KERN_ERR, ohci->host->id,
|
|
"Iso channel %d out of bound", channel);
|
|
return -EINVAL;
|
|
}
|
|
mask = (u64)0x1<<channel;
|
|
if (!(ohci->ISO_channel_usage & mask)) {
|
|
PRINT(KERN_ERR, ohci->host->id,
|
|
"Channel %d is not being used", channel);
|
|
return -ESRCH;
|
|
}
|
|
|
|
/* Mark this channel as unused */
|
|
ohci->ISO_channel_usage &= ~mask;
|
|
|
|
if (cmd == VIDEO1394_IOC_UNLISTEN_CHANNEL)
|
|
d = find_ctx(&ctx->context_list, OHCI_ISO_RECEIVE, channel);
|
|
else
|
|
d = find_ctx(&ctx->context_list, OHCI_ISO_TRANSMIT, channel);
|
|
|
|
if (d == NULL) return -ESRCH;
|
|
PRINT(KERN_INFO, ohci->host->id, "Iso context %d "
|
|
"stop talking on channel %d", d->ctx, channel);
|
|
free_dma_iso_ctx(d);
|
|
|
|
return 0;
|
|
}
|
|
case VIDEO1394_IOC_LISTEN_QUEUE_BUFFER:
|
|
{
|
|
struct video1394_wait v;
|
|
struct dma_iso_ctx *d;
|
|
|
|
if (copy_from_user(&v, argp, sizeof(v)))
|
|
return -EFAULT;
|
|
|
|
d = find_ctx(&ctx->context_list, OHCI_ISO_RECEIVE, v.channel);
|
|
if (d == NULL) return -EFAULT;
|
|
|
|
if ((v.buffer<0) || (v.buffer>d->num_desc)) {
|
|
PRINT(KERN_ERR, ohci->host->id,
|
|
"Buffer %d out of range",v.buffer);
|
|
return -EINVAL;
|
|
}
|
|
|
|
spin_lock_irqsave(&d->lock,flags);
|
|
|
|
if (d->buffer_status[v.buffer]==VIDEO1394_BUFFER_QUEUED) {
|
|
PRINT(KERN_ERR, ohci->host->id,
|
|
"Buffer %d is already used",v.buffer);
|
|
spin_unlock_irqrestore(&d->lock,flags);
|
|
return -EBUSY;
|
|
}
|
|
|
|
d->buffer_status[v.buffer]=VIDEO1394_BUFFER_QUEUED;
|
|
|
|
if (d->last_buffer>=0)
|
|
d->ir_prg[d->last_buffer][d->nb_cmd-1].branchAddress =
|
|
cpu_to_le32((dma_prog_region_offset_to_bus(&d->prg_reg[v.buffer], 0)
|
|
& 0xfffffff0) | 0x1);
|
|
|
|
d->last_buffer = v.buffer;
|
|
|
|
d->ir_prg[d->last_buffer][d->nb_cmd-1].branchAddress = 0;
|
|
|
|
spin_unlock_irqrestore(&d->lock,flags);
|
|
|
|
if (!(reg_read(ohci, d->ctrlSet) & 0x8000))
|
|
{
|
|
DBGMSG(ohci->host->id, "Starting iso DMA ctx=%d",d->ctx);
|
|
|
|
/* Tell the controller where the first program is */
|
|
reg_write(ohci, d->cmdPtr,
|
|
dma_prog_region_offset_to_bus(&d->prg_reg[v.buffer], 0) | 0x1);
|
|
|
|
/* Run IR context */
|
|
reg_write(ohci, d->ctrlSet, 0x8000);
|
|
}
|
|
else {
|
|
/* Wake up dma context if necessary */
|
|
if (!(reg_read(ohci, d->ctrlSet) & 0x400)) {
|
|
PRINT(KERN_INFO, ohci->host->id,
|
|
"Waking up iso dma ctx=%d", d->ctx);
|
|
reg_write(ohci, d->ctrlSet, 0x1000);
|
|
}
|
|
}
|
|
return 0;
|
|
|
|
}
|
|
case VIDEO1394_IOC_LISTEN_WAIT_BUFFER:
|
|
case VIDEO1394_IOC_LISTEN_POLL_BUFFER:
|
|
{
|
|
struct video1394_wait v;
|
|
struct dma_iso_ctx *d;
|
|
int i;
|
|
|
|
if (copy_from_user(&v, argp, sizeof(v)))
|
|
return -EFAULT;
|
|
|
|
d = find_ctx(&ctx->context_list, OHCI_ISO_RECEIVE, v.channel);
|
|
if (d == NULL) return -EFAULT;
|
|
|
|
if ((v.buffer<0) || (v.buffer>d->num_desc)) {
|
|
PRINT(KERN_ERR, ohci->host->id,
|
|
"Buffer %d out of range",v.buffer);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* I change the way it works so that it returns
|
|
* the last received frame.
|
|
*/
|
|
spin_lock_irqsave(&d->lock, flags);
|
|
switch(d->buffer_status[v.buffer]) {
|
|
case VIDEO1394_BUFFER_READY:
|
|
d->buffer_status[v.buffer]=VIDEO1394_BUFFER_FREE;
|
|
break;
|
|
case VIDEO1394_BUFFER_QUEUED:
|
|
if (cmd == VIDEO1394_IOC_LISTEN_POLL_BUFFER) {
|
|
/* for polling, return error code EINTR */
|
|
spin_unlock_irqrestore(&d->lock, flags);
|
|
return -EINTR;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&d->lock, flags);
|
|
wait_event_interruptible(d->waitq,
|
|
video1394_buffer_state(d, v.buffer) ==
|
|
VIDEO1394_BUFFER_READY);
|
|
if (signal_pending(current))
|
|
return -EINTR;
|
|
spin_lock_irqsave(&d->lock, flags);
|
|
d->buffer_status[v.buffer]=VIDEO1394_BUFFER_FREE;
|
|
break;
|
|
default:
|
|
PRINT(KERN_ERR, ohci->host->id,
|
|
"Buffer %d is not queued",v.buffer);
|
|
spin_unlock_irqrestore(&d->lock, flags);
|
|
return -ESRCH;
|
|
}
|
|
|
|
/* set time of buffer */
|
|
v.filltime = d->buffer_time[v.buffer];
|
|
// printk("Buffer %d time %d\n", v.buffer, (d->buffer_time[v.buffer]).tv_usec);
|
|
|
|
/*
|
|
* Look ahead to see how many more buffers have been received
|
|
*/
|
|
i=0;
|
|
while (d->buffer_status[(v.buffer+1)%d->num_desc]==
|
|
VIDEO1394_BUFFER_READY) {
|
|
v.buffer=(v.buffer+1)%d->num_desc;
|
|
i++;
|
|
}
|
|
spin_unlock_irqrestore(&d->lock, flags);
|
|
|
|
v.buffer=i;
|
|
if (copy_to_user(argp, &v, sizeof(v)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
case VIDEO1394_IOC_TALK_QUEUE_BUFFER:
|
|
{
|
|
struct video1394_wait v;
|
|
unsigned int *psizes = NULL;
|
|
struct dma_iso_ctx *d;
|
|
|
|
if (copy_from_user(&v, argp, sizeof(v)))
|
|
return -EFAULT;
|
|
|
|
d = find_ctx(&ctx->context_list, OHCI_ISO_TRANSMIT, v.channel);
|
|
if (d == NULL) return -EFAULT;
|
|
|
|
if ((v.buffer<0) || (v.buffer>d->num_desc)) {
|
|
PRINT(KERN_ERR, ohci->host->id,
|
|
"Buffer %d out of range",v.buffer);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (d->flags & VIDEO1394_VARIABLE_PACKET_SIZE) {
|
|
int buf_size = d->nb_cmd * sizeof(unsigned int);
|
|
struct video1394_queue_variable __user *p = argp;
|
|
unsigned int __user *qv;
|
|
|
|
if (get_user(qv, &p->packet_sizes))
|
|
return -EFAULT;
|
|
|
|
psizes = kmalloc(buf_size, GFP_KERNEL);
|
|
if (!psizes)
|
|
return -ENOMEM;
|
|
|
|
if (copy_from_user(psizes, qv, buf_size)) {
|
|
kfree(psizes);
|
|
return -EFAULT;
|
|
}
|
|
}
|
|
|
|
spin_lock_irqsave(&d->lock,flags);
|
|
|
|
if (d->buffer_status[v.buffer]!=VIDEO1394_BUFFER_FREE) {
|
|
PRINT(KERN_ERR, ohci->host->id,
|
|
"Buffer %d is already used",v.buffer);
|
|
spin_unlock_irqrestore(&d->lock,flags);
|
|
if (psizes)
|
|
kfree(psizes);
|
|
return -EBUSY;
|
|
}
|
|
|
|
if (d->flags & VIDEO1394_VARIABLE_PACKET_SIZE) {
|
|
initialize_dma_it_prg_var_packet_queue(
|
|
d, v.buffer, psizes,
|
|
ohci);
|
|
}
|
|
|
|
d->buffer_status[v.buffer]=VIDEO1394_BUFFER_QUEUED;
|
|
|
|
if (d->last_buffer >= 0) {
|
|
d->it_prg[d->last_buffer]
|
|
[ d->last_used_cmd[d->last_buffer] ].end.branchAddress =
|
|
cpu_to_le32((dma_prog_region_offset_to_bus(&d->prg_reg[v.buffer],
|
|
0) & 0xfffffff0) | 0x3);
|
|
|
|
d->it_prg[d->last_buffer]
|
|
[ d->last_used_cmd[d->last_buffer] ].begin.branchAddress =
|
|
cpu_to_le32((dma_prog_region_offset_to_bus(&d->prg_reg[v.buffer],
|
|
0) & 0xfffffff0) | 0x3);
|
|
d->next_buffer[d->last_buffer] = v.buffer;
|
|
}
|
|
d->last_buffer = v.buffer;
|
|
d->next_buffer[d->last_buffer] = -1;
|
|
|
|
d->it_prg[d->last_buffer][d->last_used_cmd[d->last_buffer]].end.branchAddress = 0;
|
|
|
|
spin_unlock_irqrestore(&d->lock,flags);
|
|
|
|
if (!(reg_read(ohci, d->ctrlSet) & 0x8000))
|
|
{
|
|
DBGMSG(ohci->host->id, "Starting iso transmit DMA ctx=%d",
|
|
d->ctx);
|
|
put_timestamp(ohci, d, d->last_buffer);
|
|
|
|
/* Tell the controller where the first program is */
|
|
reg_write(ohci, d->cmdPtr,
|
|
dma_prog_region_offset_to_bus(&d->prg_reg[v.buffer], 0) | 0x3);
|
|
|
|
/* Run IT context */
|
|
reg_write(ohci, d->ctrlSet, 0x8000);
|
|
}
|
|
else {
|
|
/* Wake up dma context if necessary */
|
|
if (!(reg_read(ohci, d->ctrlSet) & 0x400)) {
|
|
PRINT(KERN_INFO, ohci->host->id,
|
|
"Waking up iso transmit dma ctx=%d",
|
|
d->ctx);
|
|
put_timestamp(ohci, d, d->last_buffer);
|
|
reg_write(ohci, d->ctrlSet, 0x1000);
|
|
}
|
|
}
|
|
|
|
if (psizes)
|
|
kfree(psizes);
|
|
|
|
return 0;
|
|
|
|
}
|
|
case VIDEO1394_IOC_TALK_WAIT_BUFFER:
|
|
{
|
|
struct video1394_wait v;
|
|
struct dma_iso_ctx *d;
|
|
|
|
if (copy_from_user(&v, argp, sizeof(v)))
|
|
return -EFAULT;
|
|
|
|
d = find_ctx(&ctx->context_list, OHCI_ISO_TRANSMIT, v.channel);
|
|
if (d == NULL) return -EFAULT;
|
|
|
|
if ((v.buffer<0) || (v.buffer>d->num_desc)) {
|
|
PRINT(KERN_ERR, ohci->host->id,
|
|
"Buffer %d out of range",v.buffer);
|
|
return -EINVAL;
|
|
}
|
|
|
|
switch(d->buffer_status[v.buffer]) {
|
|
case VIDEO1394_BUFFER_READY:
|
|
d->buffer_status[v.buffer]=VIDEO1394_BUFFER_FREE;
|
|
return 0;
|
|
case VIDEO1394_BUFFER_QUEUED:
|
|
wait_event_interruptible(d->waitq,
|
|
(d->buffer_status[v.buffer] == VIDEO1394_BUFFER_READY));
|
|
if (signal_pending(current))
|
|
return -EINTR;
|
|
d->buffer_status[v.buffer]=VIDEO1394_BUFFER_FREE;
|
|
return 0;
|
|
default:
|
|
PRINT(KERN_ERR, ohci->host->id,
|
|
"Buffer %d is not queued",v.buffer);
|
|
return -ESRCH;
|
|
}
|
|
}
|
|
default:
|
|
return -ENOTTY;
|
|
}
|
|
}
|
|
|
|
static long video1394_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
|
{
|
|
int err;
|
|
lock_kernel();
|
|
err = __video1394_ioctl(file, cmd, arg);
|
|
unlock_kernel();
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* This maps the vmalloced and reserved buffer to user space.
|
|
*
|
|
* FIXME:
|
|
* - PAGE_READONLY should suffice!?
|
|
* - remap_pfn_range is kind of inefficient for page by page remapping.
|
|
* But e.g. pte_alloc() does not work in modules ... :-(
|
|
*/
|
|
|
|
static int video1394_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
struct file_ctx *ctx = (struct file_ctx *)file->private_data;
|
|
int res = -EINVAL;
|
|
|
|
lock_kernel();
|
|
if (ctx->current_ctx == NULL) {
|
|
PRINT(KERN_ERR, ctx->ohci->host->id, "Current iso context not set");
|
|
} else
|
|
res = dma_region_mmap(&ctx->current_ctx->dma, file, vma);
|
|
unlock_kernel();
|
|
|
|
return res;
|
|
}
|
|
|
|
static int video1394_open(struct inode *inode, struct file *file)
|
|
{
|
|
int i = ieee1394_file_to_instance(file);
|
|
struct ti_ohci *ohci;
|
|
struct file_ctx *ctx;
|
|
|
|
ohci = hpsb_get_hostinfo_bykey(&video1394_highlevel, i);
|
|
if (ohci == NULL)
|
|
return -EIO;
|
|
|
|
ctx = kmalloc(sizeof(struct file_ctx), GFP_KERNEL);
|
|
if (ctx == NULL) {
|
|
PRINT(KERN_ERR, ohci->host->id, "Cannot malloc file_ctx");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
memset(ctx, 0, sizeof(struct file_ctx));
|
|
ctx->ohci = ohci;
|
|
INIT_LIST_HEAD(&ctx->context_list);
|
|
ctx->current_ctx = NULL;
|
|
file->private_data = ctx;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int video1394_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct file_ctx *ctx = (struct file_ctx *)file->private_data;
|
|
struct ti_ohci *ohci = ctx->ohci;
|
|
struct list_head *lh, *next;
|
|
u64 mask;
|
|
|
|
lock_kernel();
|
|
list_for_each_safe(lh, next, &ctx->context_list) {
|
|
struct dma_iso_ctx *d;
|
|
d = list_entry(lh, struct dma_iso_ctx, link);
|
|
mask = (u64) 1 << d->channel;
|
|
|
|
if (!(ohci->ISO_channel_usage & mask))
|
|
PRINT(KERN_ERR, ohci->host->id, "On release: Channel %d "
|
|
"is not being used", d->channel);
|
|
else
|
|
ohci->ISO_channel_usage &= ~mask;
|
|
PRINT(KERN_INFO, ohci->host->id, "On release: Iso %s context "
|
|
"%d stop listening on channel %d",
|
|
d->type == OHCI_ISO_RECEIVE ? "receive" : "transmit",
|
|
d->ctx, d->channel);
|
|
free_dma_iso_ctx(d);
|
|
}
|
|
|
|
kfree(ctx);
|
|
file->private_data = NULL;
|
|
|
|
unlock_kernel();
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
static long video1394_compat_ioctl(struct file *f, unsigned cmd, unsigned long arg);
|
|
#endif
|
|
|
|
static struct cdev video1394_cdev;
|
|
static struct file_operations video1394_fops=
|
|
{
|
|
.owner = THIS_MODULE,
|
|
.unlocked_ioctl = video1394_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = video1394_compat_ioctl,
|
|
#endif
|
|
.mmap = video1394_mmap,
|
|
.open = video1394_open,
|
|
.release = video1394_release
|
|
};
|
|
|
|
/*** HOTPLUG STUFF **********************************************************/
|
|
/*
|
|
* Export information about protocols/devices supported by this driver.
|
|
*/
|
|
static struct ieee1394_device_id video1394_id_table[] = {
|
|
{
|
|
.match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
|
|
.specifier_id = CAMERA_UNIT_SPEC_ID_ENTRY & 0xffffff,
|
|
.version = CAMERA_SW_VERSION_ENTRY & 0xffffff
|
|
},
|
|
{
|
|
.match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
|
|
.specifier_id = CAMERA_UNIT_SPEC_ID_ENTRY & 0xffffff,
|
|
.version = (CAMERA_SW_VERSION_ENTRY + 1) & 0xffffff
|
|
},
|
|
{
|
|
.match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
|
|
.specifier_id = CAMERA_UNIT_SPEC_ID_ENTRY & 0xffffff,
|
|
.version = (CAMERA_SW_VERSION_ENTRY + 2) & 0xffffff
|
|
},
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(ieee1394, video1394_id_table);
|
|
|
|
static struct hpsb_protocol_driver video1394_driver = {
|
|
.name = "1394 Digital Camera Driver",
|
|
.id_table = video1394_id_table,
|
|
.driver = {
|
|
.name = VIDEO1394_DRIVER_NAME,
|
|
.bus = &ieee1394_bus_type,
|
|
},
|
|
};
|
|
|
|
|
|
static void video1394_add_host (struct hpsb_host *host)
|
|
{
|
|
struct ti_ohci *ohci;
|
|
int minor;
|
|
|
|
/* We only work with the OHCI-1394 driver */
|
|
if (strcmp(host->driver->name, OHCI1394_DRIVER_NAME))
|
|
return;
|
|
|
|
ohci = (struct ti_ohci *)host->hostdata;
|
|
|
|
if (!hpsb_create_hostinfo(&video1394_highlevel, host, 0)) {
|
|
PRINT(KERN_ERR, ohci->host->id, "Cannot allocate hostinfo");
|
|
return;
|
|
}
|
|
|
|
hpsb_set_hostinfo(&video1394_highlevel, host, ohci);
|
|
hpsb_set_hostinfo_key(&video1394_highlevel, host, ohci->host->id);
|
|
|
|
minor = IEEE1394_MINOR_BLOCK_VIDEO1394 * 16 + ohci->host->id;
|
|
class_simple_device_add(hpsb_protocol_class, MKDEV(
|
|
IEEE1394_MAJOR, minor),
|
|
NULL, "%s-%d", VIDEO1394_DRIVER_NAME, ohci->host->id);
|
|
devfs_mk_cdev(MKDEV(IEEE1394_MAJOR, minor),
|
|
S_IFCHR | S_IRUSR | S_IWUSR,
|
|
"%s/%d", VIDEO1394_DRIVER_NAME, ohci->host->id);
|
|
}
|
|
|
|
|
|
static void video1394_remove_host (struct hpsb_host *host)
|
|
{
|
|
struct ti_ohci *ohci = hpsb_get_hostinfo(&video1394_highlevel, host);
|
|
|
|
if (ohci) {
|
|
class_simple_device_remove(MKDEV(IEEE1394_MAJOR,
|
|
IEEE1394_MINOR_BLOCK_VIDEO1394 * 16 + ohci->host->id));
|
|
devfs_remove("%s/%d", VIDEO1394_DRIVER_NAME, ohci->host->id);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
static struct hpsb_highlevel video1394_highlevel = {
|
|
.name = VIDEO1394_DRIVER_NAME,
|
|
.add_host = video1394_add_host,
|
|
.remove_host = video1394_remove_host,
|
|
};
|
|
|
|
MODULE_AUTHOR("Sebastien Rougeaux <sebastien.rougeaux@anu.edu.au>");
|
|
MODULE_DESCRIPTION("driver for digital video on OHCI board");
|
|
MODULE_SUPPORTED_DEVICE(VIDEO1394_DRIVER_NAME);
|
|
MODULE_LICENSE("GPL");
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
|
|
#define VIDEO1394_IOC32_LISTEN_QUEUE_BUFFER \
|
|
_IOW ('#', 0x12, struct video1394_wait32)
|
|
#define VIDEO1394_IOC32_LISTEN_WAIT_BUFFER \
|
|
_IOWR('#', 0x13, struct video1394_wait32)
|
|
#define VIDEO1394_IOC32_TALK_WAIT_BUFFER \
|
|
_IOW ('#', 0x17, struct video1394_wait32)
|
|
#define VIDEO1394_IOC32_LISTEN_POLL_BUFFER \
|
|
_IOWR('#', 0x18, struct video1394_wait32)
|
|
|
|
struct video1394_wait32 {
|
|
u32 channel;
|
|
u32 buffer;
|
|
struct compat_timeval filltime;
|
|
};
|
|
|
|
static int video1394_wr_wait32(struct file *file, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct video1394_wait32 __user *argp = (void __user *)arg;
|
|
struct video1394_wait32 wait32;
|
|
struct video1394_wait wait;
|
|
mm_segment_t old_fs;
|
|
int ret;
|
|
|
|
if (copy_from_user(&wait32, argp, sizeof(wait32)))
|
|
return -EFAULT;
|
|
|
|
wait.channel = wait32.channel;
|
|
wait.buffer = wait32.buffer;
|
|
wait.filltime.tv_sec = (time_t)wait32.filltime.tv_sec;
|
|
wait.filltime.tv_usec = (suseconds_t)wait32.filltime.tv_usec;
|
|
|
|
old_fs = get_fs();
|
|
set_fs(KERNEL_DS);
|
|
if (cmd == VIDEO1394_IOC32_LISTEN_WAIT_BUFFER)
|
|
ret = video1394_ioctl(file,
|
|
VIDEO1394_IOC_LISTEN_WAIT_BUFFER,
|
|
(unsigned long) &wait);
|
|
else
|
|
ret = video1394_ioctl(file,
|
|
VIDEO1394_IOC_LISTEN_POLL_BUFFER,
|
|
(unsigned long) &wait);
|
|
set_fs(old_fs);
|
|
|
|
if (!ret) {
|
|
wait32.channel = wait.channel;
|
|
wait32.buffer = wait.buffer;
|
|
wait32.filltime.tv_sec = (int)wait.filltime.tv_sec;
|
|
wait32.filltime.tv_usec = (int)wait.filltime.tv_usec;
|
|
|
|
if (copy_to_user(argp, &wait32, sizeof(wait32)))
|
|
ret = -EFAULT;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int video1394_w_wait32(struct file *file, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct video1394_wait32 wait32;
|
|
struct video1394_wait wait;
|
|
mm_segment_t old_fs;
|
|
int ret;
|
|
|
|
if (copy_from_user(&wait32, (void __user *)arg, sizeof(wait32)))
|
|
return -EFAULT;
|
|
|
|
wait.channel = wait32.channel;
|
|
wait.buffer = wait32.buffer;
|
|
wait.filltime.tv_sec = (time_t)wait32.filltime.tv_sec;
|
|
wait.filltime.tv_usec = (suseconds_t)wait32.filltime.tv_usec;
|
|
|
|
old_fs = get_fs();
|
|
set_fs(KERNEL_DS);
|
|
if (cmd == VIDEO1394_IOC32_LISTEN_QUEUE_BUFFER)
|
|
ret = video1394_ioctl(file,
|
|
VIDEO1394_IOC_LISTEN_QUEUE_BUFFER,
|
|
(unsigned long) &wait);
|
|
else
|
|
ret = video1394_ioctl(file,
|
|
VIDEO1394_IOC_TALK_WAIT_BUFFER,
|
|
(unsigned long) &wait);
|
|
set_fs(old_fs);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int video1394_queue_buf32(struct file *file, unsigned int cmd, unsigned long arg)
|
|
{
|
|
return -EFAULT; /* ??? was there before. */
|
|
|
|
return video1394_ioctl(file,
|
|
VIDEO1394_IOC_TALK_QUEUE_BUFFER, arg);
|
|
}
|
|
|
|
static long video1394_compat_ioctl(struct file *f, unsigned cmd, unsigned long arg)
|
|
{
|
|
switch (cmd) {
|
|
case VIDEO1394_IOC_LISTEN_CHANNEL:
|
|
case VIDEO1394_IOC_UNLISTEN_CHANNEL:
|
|
case VIDEO1394_IOC_TALK_CHANNEL:
|
|
case VIDEO1394_IOC_UNTALK_CHANNEL:
|
|
return video1394_ioctl(f, cmd, arg);
|
|
|
|
case VIDEO1394_IOC32_LISTEN_QUEUE_BUFFER:
|
|
return video1394_w_wait32(f, cmd, arg);
|
|
case VIDEO1394_IOC32_LISTEN_WAIT_BUFFER:
|
|
return video1394_wr_wait32(f, cmd, arg);
|
|
case VIDEO1394_IOC_TALK_QUEUE_BUFFER:
|
|
return video1394_queue_buf32(f, cmd, arg);
|
|
case VIDEO1394_IOC32_TALK_WAIT_BUFFER:
|
|
return video1394_w_wait32(f, cmd, arg);
|
|
case VIDEO1394_IOC32_LISTEN_POLL_BUFFER:
|
|
return video1394_wr_wait32(f, cmd, arg);
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
}
|
|
|
|
#endif /* CONFIG_COMPAT */
|
|
|
|
static void __exit video1394_exit_module (void)
|
|
{
|
|
hpsb_unregister_protocol(&video1394_driver);
|
|
|
|
hpsb_unregister_highlevel(&video1394_highlevel);
|
|
|
|
devfs_remove(VIDEO1394_DRIVER_NAME);
|
|
cdev_del(&video1394_cdev);
|
|
|
|
PRINT_G(KERN_INFO, "Removed " VIDEO1394_DRIVER_NAME " module");
|
|
}
|
|
|
|
static int __init video1394_init_module (void)
|
|
{
|
|
int ret;
|
|
|
|
cdev_init(&video1394_cdev, &video1394_fops);
|
|
video1394_cdev.owner = THIS_MODULE;
|
|
kobject_set_name(&video1394_cdev.kobj, VIDEO1394_DRIVER_NAME);
|
|
ret = cdev_add(&video1394_cdev, IEEE1394_VIDEO1394_DEV, 16);
|
|
if (ret) {
|
|
PRINT_G(KERN_ERR, "video1394: unable to get minor device block");
|
|
return ret;
|
|
}
|
|
|
|
devfs_mk_dir(VIDEO1394_DRIVER_NAME);
|
|
|
|
hpsb_register_highlevel(&video1394_highlevel);
|
|
|
|
ret = hpsb_register_protocol(&video1394_driver);
|
|
if (ret) {
|
|
PRINT_G(KERN_ERR, "video1394: failed to register protocol");
|
|
hpsb_unregister_highlevel(&video1394_highlevel);
|
|
devfs_remove(VIDEO1394_DRIVER_NAME);
|
|
cdev_del(&video1394_cdev);
|
|
return ret;
|
|
}
|
|
|
|
PRINT_G(KERN_INFO, "Installed " VIDEO1394_DRIVER_NAME " module");
|
|
return 0;
|
|
}
|
|
|
|
|
|
module_init(video1394_init_module);
|
|
module_exit(video1394_exit_module);
|
|
MODULE_ALIAS_CHARDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_VIDEO1394 * 16);
|