video1394.c
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上传日期:2013-02-24
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文件大小:44k
- /*
- * video1394.c - video driver for OHCI 1394 boards
- * Copyright (C)1999,2000 Sebastien Rougeaux <sebastien.rougeaux@anu.edu.au>
- * Peter Schlaile <udbz@rz.uni-karlsruhe.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
- #include <linux/config.h>
- #include <linux/kernel.h>
- #include <linux/list.h>
- #include <linux/slab.h>
- #include <linux/interrupt.h>
- #include <linux/wait.h>
- #include <linux/errno.h>
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/pci.h>
- #include <linux/fs.h>
- #include <linux/poll.h>
- #include <linux/smp_lock.h>
- #include <asm/byteorder.h>
- #include <asm/atomic.h>
- #include <asm/io.h>
- #include <asm/uaccess.h>
- #include <linux/proc_fs.h>
- #include <linux/tqueue.h>
- #include <linux/delay.h>
- #include <linux/devfs_fs_kernel.h>
- #include <asm/pgtable.h>
- #include <asm/page.h>
- #include <linux/sched.h>
- #include <asm/segment.h>
- #include <linux/types.h>
- #include <linux/wrapper.h>
- #include <linux/vmalloc.h>
- #include <linux/timex.h>
- #include <linux/mm.h>
- #include "ieee1394.h"
- #include "ieee1394_types.h"
- #include "hosts.h"
- #include "ieee1394_core.h"
- #include "highlevel.h"
- #include "video1394.h"
- #include "ohci1394.h"
- #define VIDEO1394_MAJOR 172
- #define ISO_CHANNELS 64
- #define ISO_RECEIVE 0
- #define ISO_TRANSMIT 1
- #ifndef virt_to_page
- #define virt_to_page(x) MAP_NR(x)
- #endif
- #ifndef vmalloc_32
- #define vmalloc_32(x) vmalloc(x)
- #endif
- struct it_dma_prg {
- struct dma_cmd begin;
- quadlet_t data[4];
- struct dma_cmd end;
- quadlet_t pad[4]; /* FIXME: quick hack for memory alignment */
- };
- struct dma_iso_ctx {
- struct ti_ohci *ohci;
- int ctx;
- int channel;
- int last_buffer;
- int * next_buffer; /* For ISO Transmit of video packets
- to write the correct SYT field
- into the next block */
- unsigned int num_desc;
- unsigned int buf_size;
- unsigned int frame_size;
- unsigned int packet_size;
- unsigned int left_size;
- unsigned int nb_cmd;
- unsigned char *buf;
- struct dma_cmd **ir_prg;
- struct it_dma_prg **it_prg;
- unsigned int *buffer_status;
- struct timeval *buffer_time; /* time when the buffer was received */
- unsigned int *last_used_cmd; /* For ISO Transmit with
- variable sized packets only ! */
- int ctrlClear;
- int ctrlSet;
- int cmdPtr;
- int ctxMatch;
- wait_queue_head_t waitq;
- spinlock_t lock;
- unsigned int syt_offset;
- int flags;
- };
- struct video_card {
- struct ti_ohci *ohci;
- struct list_head list;
- int id;
- devfs_handle_t devfs;
- struct dma_iso_ctx **ir_context;
- struct dma_iso_ctx **it_context;
- struct dma_iso_ctx *current_ctx;
- };
- #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
- #define VIDEO1394_DEBUG
- #endif
- #ifdef DBGMSG
- #undef DBGMSG
- #endif
- #ifdef VIDEO1394_DEBUG
- #define DBGMSG(card, fmt, args...)
- printk(KERN_INFO "video1394_%d: " fmt "n" , card , ## args)
- #else
- #define DBGMSG(card, fmt, args...)
- #endif
- /* print general (card independent) information */
- #define PRINT_G(level, fmt, args...)
- printk(level "video1394: " fmt "n" , ## args)
- /* print card specific information */
- #define PRINT(level, card, fmt, args...)
- printk(level "video1394_%d: " fmt "n" , card , ## args)
- static void irq_handler(int card, quadlet_t isoRecvIntEvent,
- quadlet_t isoXmitIntEvent);
- static LIST_HEAD(video1394_cards);
- static spinlock_t video1394_cards_lock = SPIN_LOCK_UNLOCKED;
- static devfs_handle_t devfs_handle;
- static struct hpsb_highlevel *hl_handle = NULL;
- static struct video_template video_tmpl = { irq_handler };
- /* Code taken from bttv.c */
- /*******************************/
- /* Memory management functions */
- /*******************************/
- #define MDEBUG(x) do { } while(0) /* Debug memory management */
- /* [DaveM] I've recoded most of this so that:
- * 1) It's easier to tell what is happening
- * 2) It's more portable, especially for translating things
- * out of vmalloc mapped areas in the kernel.
- * 3) Less unnecessary translations happen.
- *
- * The code used to assume that the kernel vmalloc mappings
- * existed in the page tables of every process, this is simply
- * not guaranteed. We now use pgd_offset_k which is the
- * defined way to get at the kernel page tables.
- */
- /* Given PGD from the address space's page table, return the kernel
- * virtual mapping of the physical memory mapped at ADR.
- */
- static inline unsigned long uvirt_to_kva(pgd_t *pgd, unsigned long adr)
- {
- unsigned long ret = 0UL;
- pmd_t *pmd;
- pte_t *ptep, pte;
-
- if (!pgd_none(*pgd)) {
- pmd = pmd_offset(pgd, adr);
- if (!pmd_none(*pmd)) {
- ptep = pte_offset(pmd, adr);
- pte = *ptep;
- if(pte_present(pte)) {
- ret = (unsigned long)
- page_address(pte_page(pte));
- ret |= (adr & (PAGE_SIZE - 1));
- }
- }
- }
- MDEBUG(printk("uv2kva(%lx-->%lx)", adr, ret));
- return ret;
- }
- static inline unsigned long uvirt_to_bus(unsigned long adr)
- {
- unsigned long kva, ret;
- kva = uvirt_to_kva(pgd_offset(current->mm, adr), adr);
- ret = virt_to_bus((void *)kva);
- MDEBUG(printk("uv2b(%lx-->%lx)", adr, ret));
- return ret;
- }
- static inline unsigned long kvirt_to_bus(unsigned long adr)
- {
- unsigned long va, kva, ret;
- va = VMALLOC_VMADDR(adr);
- kva = uvirt_to_kva(pgd_offset_k(va), va);
- ret = virt_to_bus((void *)kva);
- MDEBUG(printk("kv2b(%lx-->%lx)", adr, ret));
- return ret;
- }
- /* Here we want the physical address of the memory.
- * This is used when initializing the contents of the
- * area and marking the pages as reserved.
- */
- static inline unsigned long kvirt_to_pa(unsigned long adr)
- {
- unsigned long va, kva, ret;
- va = VMALLOC_VMADDR(adr);
- kva = uvirt_to_kva(pgd_offset_k(va), va);
- ret = __pa(kva);
- MDEBUG(printk("kv2pa(%lx-->%lx)", adr, ret));
- return ret;
- }
- static void * rvmalloc(unsigned long size)
- {
- void * mem;
- unsigned long adr, page;
-
- mem=vmalloc_32(size);
- if (mem)
- {
- memset(mem, 0, size); /* Clear the ram out,
- no junk to the user */
- adr=(unsigned long) mem;
- while (size > 0)
- {
- page = kvirt_to_pa(adr);
- mem_map_reserve(virt_to_page(__va(page)));
- adr+=PAGE_SIZE;
- size-=PAGE_SIZE;
- }
- }
- return mem;
- }
- static void rvfree(void * mem, unsigned long size)
- {
- unsigned long adr, page;
-
- if (mem)
- {
- adr=(unsigned long) mem;
- while (size > 0)
- {
- page = kvirt_to_pa(adr);
- mem_map_unreserve(virt_to_page(__va(page)));
- adr+=PAGE_SIZE;
- size-=PAGE_SIZE;
- }
- vfree(mem);
- }
- }
- /* End of code taken from bttv.c */
- static int free_dma_iso_ctx(struct dma_iso_ctx **d)
- {
- int i;
- struct ti_ohci *ohci;
-
- if ((*d)==NULL) return -1;
- ohci = (struct ti_ohci *)(*d)->ohci;
- DBGMSG(ohci->id, "Freeing dma_iso_ctx %d", (*d)->ctx);
- ohci1394_stop_context(ohci, (*d)->ctrlClear, NULL);
- if ((*d)->buf) rvfree((void *)(*d)->buf,
- (*d)->num_desc * (*d)->buf_size);
- if ((*d)->ir_prg) {
- for (i=0;i<(*d)->num_desc;i++)
- if ((*d)->ir_prg[i]) kfree((*d)->ir_prg[i]);
- kfree((*d)->ir_prg);
- }
- if ((*d)->it_prg) {
- for (i=0;i<(*d)->num_desc;i++)
- if ((*d)->it_prg[i]) kfree((*d)->it_prg[i]);
- kfree((*d)->it_prg);
- }
- if ((*d)->buffer_status)
- kfree((*d)->buffer_status);
- if ((*d)->buffer_time)
- kfree((*d)->buffer_time);
- if ((*d)->last_used_cmd)
- kfree((*d)->last_used_cmd);
- if ((*d)->next_buffer)
- kfree((*d)->next_buffer);
- kfree(*d);
- *d = NULL;
- return 0;
- }
- static struct dma_iso_ctx *
- alloc_dma_iso_ctx(struct ti_ohci *ohci, int type, int ctx, int num_desc,
- int buf_size, int channel, unsigned int packet_size)
- {
- struct dma_iso_ctx *d=NULL;
- int i;
- d = (struct dma_iso_ctx *)kmalloc(sizeof(struct dma_iso_ctx),
- GFP_KERNEL);
- if (d==NULL) {
- PRINT(KERN_ERR, ohci->id, "Failed to allocate dma_iso_ctx");
- return NULL;
- }
- memset(d, 0, sizeof(struct dma_iso_ctx));
- d->ohci = (void *)ohci;
- d->ctx = ctx;
- d->channel = channel;
- d->num_desc = num_desc;
- d->frame_size = buf_size;
- if (buf_size%PAGE_SIZE)
- d->buf_size = buf_size + PAGE_SIZE - (buf_size%PAGE_SIZE);
- else
- d->buf_size = buf_size;
- d->last_buffer = -1;
- d->buf = NULL;
- d->ir_prg = NULL;
- init_waitqueue_head(&d->waitq);
- d->buf = rvmalloc(d->num_desc * d->buf_size);
- if (d->buf == NULL) {
- PRINT(KERN_ERR, ohci->id, "Failed to allocate dma buffer");
- free_dma_iso_ctx(&d);
- return NULL;
- }
- memset(d->buf, 0, d->num_desc * d->buf_size);
- if (type == ISO_RECEIVE) {
- d->ctrlSet = OHCI1394_IsoRcvContextControlSet+32*d->ctx;
- d->ctrlClear = OHCI1394_IsoRcvContextControlClear+32*d->ctx;
- d->cmdPtr = OHCI1394_IsoRcvCommandPtr+32*d->ctx;
- d->ctxMatch = OHCI1394_IsoRcvContextMatch+32*d->ctx;
- d->ir_prg = kmalloc(d->num_desc * sizeof(struct dma_cmd *),
- GFP_KERNEL);
- if (d->ir_prg == NULL) {
- PRINT(KERN_ERR, ohci->id,
- "Failed to allocate dma ir prg");
- free_dma_iso_ctx(&d);
- return NULL;
- }
- memset(d->ir_prg, 0, d->num_desc * sizeof(struct dma_cmd *));
-
- d->nb_cmd = d->buf_size / PAGE_SIZE + 1;
- d->left_size = (d->frame_size % PAGE_SIZE) ?
- d->frame_size % PAGE_SIZE : PAGE_SIZE;
- for (i=0;i<d->num_desc;i++) {
- d->ir_prg[i] = kmalloc(d->nb_cmd *
- sizeof(struct dma_cmd),
- GFP_KERNEL);
- if (d->ir_prg[i] == NULL) {
- PRINT(KERN_ERR, ohci->id,
- "Failed to allocate dma ir prg");
- free_dma_iso_ctx(&d);
- return NULL;
- }
- }
- }
- else { /* ISO_TRANSMIT */
- d->ctrlSet = OHCI1394_IsoXmitContextControlSet+16*d->ctx;
- d->ctrlClear = OHCI1394_IsoXmitContextControlClear+16*d->ctx;
- d->cmdPtr = OHCI1394_IsoXmitCommandPtr+16*d->ctx;
- d->it_prg = kmalloc(d->num_desc * sizeof(struct it_dma_prg *),
- GFP_KERNEL);
- if (d->it_prg == NULL) {
- PRINT(KERN_ERR, ohci->id,
- "Failed to allocate dma it prg");
- free_dma_iso_ctx(&d);
- return NULL;
- }
- memset(d->it_prg, 0, d->num_desc*sizeof(struct it_dma_prg *));
-
- d->packet_size = packet_size;
- if (PAGE_SIZE % packet_size || packet_size>4096) {
- PRINT(KERN_ERR, ohci->id,
- "Packet size %d (page_size: %ld) "
- "not yet supportedn",
- packet_size, PAGE_SIZE);
- free_dma_iso_ctx(&d);
- return NULL;
- }
- d->nb_cmd = d->frame_size / d->packet_size;
- if (d->frame_size % d->packet_size) {
- d->nb_cmd++;
- d->left_size = d->frame_size % d->packet_size;
- }
- else
- d->left_size = d->packet_size;
- for (i=0;i<d->num_desc;i++) {
- d->it_prg[i] = kmalloc(d->nb_cmd *
- sizeof(struct it_dma_prg),
- GFP_KERNEL);
- if (d->it_prg[i] == NULL) {
- PRINT(KERN_ERR, ohci->id,
- "Failed to allocate dma it prg");
- free_dma_iso_ctx(&d);
- return NULL;
- }
- }
- }
- d->buffer_status = kmalloc(d->num_desc * sizeof(unsigned int),
- GFP_KERNEL);
- d->buffer_time = kmalloc(d->num_desc * sizeof(struct timeval),
- GFP_KERNEL);
- d->last_used_cmd = kmalloc(d->num_desc * sizeof(unsigned int),
- GFP_KERNEL);
- d->next_buffer = kmalloc(d->num_desc * sizeof(int),
- GFP_KERNEL);
- if (d->buffer_status == NULL) {
- PRINT(KERN_ERR, ohci->id, "Failed to allocate buffer_status");
- free_dma_iso_ctx(&d);
- return NULL;
- }
- if (d->buffer_time == NULL) {
- PRINT(KERN_ERR, ohci->id, "Failed to allocate buffer_time");
- free_dma_iso_ctx(&d);
- return NULL;
- }
- if (d->last_used_cmd == NULL) {
- PRINT(KERN_ERR, ohci->id, "Failed to allocate last_used_cmd");
- free_dma_iso_ctx(&d);
- return NULL;
- }
- if (d->next_buffer == NULL) {
- PRINT(KERN_ERR, ohci->id, "Failed to allocate next_buffer");
- free_dma_iso_ctx(&d);
- return NULL;
- }
- memset(d->buffer_status, 0, d->num_desc * sizeof(unsigned int));
- memset(d->buffer_time, 0, d->num_desc * sizeof(struct timeval));
- memset(d->last_used_cmd, 0, d->num_desc * sizeof(unsigned int));
- memset(d->next_buffer, -1, d->num_desc * sizeof(int));
-
- spin_lock_init(&d->lock);
- PRINT(KERN_INFO, ohci->id, "Iso %s DMA: %d buffers "
- "of size %d allocated for a frame size %d, each with %d prgs",
- (type==ISO_RECEIVE) ? "receive" : "transmit",
- d->num_desc, d->buf_size, d->frame_size, d->nb_cmd);
- return d;
- }
- static void reset_ir_status(struct dma_iso_ctx *d, int n)
- {
- int i;
- d->ir_prg[n][0].status = 4;
- d->ir_prg[n][1].status = PAGE_SIZE-4;
- for (i=2;i<d->nb_cmd-1;i++)
- d->ir_prg[n][i].status = PAGE_SIZE;
- d->ir_prg[n][i].status = d->left_size;
- }
- static void initialize_dma_ir_prg(struct dma_iso_ctx *d, int n, int flags)
- {
- struct dma_cmd *ir_prg = d->ir_prg[n];
- unsigned long buf = (unsigned long)d->buf+n*d->buf_size;
- int i;
- /* the first descriptor will read only 4 bytes */
- ir_prg[0].control = DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
- DMA_CTL_BRANCH | 4;
- /* set the sync flag */
- if (flags & VIDEO1394_SYNC_FRAMES)
- ir_prg[0].control |= DMA_CTL_WAIT;
- ir_prg[0].address = kvirt_to_bus(buf);
- ir_prg[0].branchAddress = (virt_to_bus(&(ir_prg[1].control))
- & 0xfffffff0) | 0x1;
- /* the second descriptor will read PAGE_SIZE-4 bytes */
- ir_prg[1].control = DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
- DMA_CTL_BRANCH | (PAGE_SIZE-4);
- ir_prg[1].address = kvirt_to_bus(buf+4);
- ir_prg[1].branchAddress = (virt_to_bus(&(ir_prg[2].control))
- & 0xfffffff0) | 0x1;
-
- for (i=2;i<d->nb_cmd-1;i++) {
- ir_prg[i].control = DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
- DMA_CTL_BRANCH | PAGE_SIZE;
- ir_prg[i].address = kvirt_to_bus(buf+(i-1)*PAGE_SIZE);
- ir_prg[i].branchAddress =
- (virt_to_bus(&(ir_prg[i+1].control))
- & 0xfffffff0) | 0x1;
- }
- /* the last descriptor will generate an interrupt */
- ir_prg[i].control = DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
- DMA_CTL_IRQ | DMA_CTL_BRANCH | d->left_size;
- ir_prg[i].address = kvirt_to_bus(buf+(i-1)*PAGE_SIZE);
- }
-
- 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 */
- int ir_ctx_listening(struct video_card *video, int channel)
- {
- int i;
- struct ti_ohci *ohci = video->ohci;
- for (i=0;i<ohci->nb_iso_rcv_ctx-1;i++)
- if (video->ir_context[i]) {
- if (video->ir_context[i]->channel==channel)
- return i;
- }
-
- PRINT(KERN_ERR, ohci->id, "No iso context is listening to channel %d",
- channel);
- return -1;
- }
- int it_ctx_talking(struct video_card *video, int channel)
- {
- int i;
- struct ti_ohci *ohci = video->ohci;
- for (i=0;i<ohci->nb_iso_xmit_ctx;i++)
- if (video->it_context[i]) {
- if (video->it_context[i]->channel==channel)
- return i;
- }
-
- PRINT(KERN_ERR, ohci->id, "No iso context is talking to channel %d",
- channel);
- return -1;
- }
- int wakeup_dma_ir_ctx(struct ti_ohci *ohci, struct dma_iso_ctx *d)
- {
- int i;
- if (d==NULL) {
- PRINT(KERN_ERR, ohci->id, "Iso receive event received but "
- "context not allocated");
- return -EFAULT;
- }
- spin_lock(&d->lock);
- for (i=0;i<d->num_desc;i++) {
- if (d->ir_prg[i][d->nb_cmd-1].status & 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);
- return 0;
- }
- static inline void put_timestamp(struct ti_ohci *ohci, struct dma_iso_ctx * d,
- int n)
- {
- unsigned char* buf = d->buf + 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 ( (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->buf + 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 ( (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: %08xn",
- curr, n, cycleTimer, timeStamp);
- #endif
- }
- int wakeup_dma_it_ctx(struct ti_ohci *ohci, struct dma_iso_ctx *d)
- {
- int i;
- if (d==NULL) {
- PRINT(KERN_ERR, ohci->id, "Iso transmit event received but "
- "context not allocated");
- return -EFAULT;
- }
- spin_lock(&d->lock);
- for (i=0;i<d->num_desc;i++) {
- if (d->it_prg[i][d->last_used_cmd[i]].end.status& 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);
- return 0;
- }
- 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];
- unsigned long buf = (unsigned long)d->buf+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 = 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] =
- (SPEED_100 << 16)
- | (/* tag */ 1 << 14)
- | (d->channel << 8)
- | (TCODE_ISO_DATA << 4);
- if (i==0) it_prg[i].data[0] |= sync_tag;
- it_prg[i].data[1] = d->packet_size << 16;
- it_prg[i].data[2] = 0;
- it_prg[i].data[3] = 0;
-
- it_prg[i].end.control = DMA_CTL_OUTPUT_LAST | DMA_CTL_BRANCH;
- it_prg[i].end.address =
- kvirt_to_bus(buf+i*d->packet_size);
- if (i<d->nb_cmd-1) {
- it_prg[i].end.control |= d->packet_size;
- it_prg[i].begin.branchAddress =
- (virt_to_bus(&(it_prg[i+1].begin.control))
- & 0xfffffff0) | 0x3;
- it_prg[i].end.branchAddress =
- (virt_to_bus(&(it_prg[i+1].begin.control))
- & 0xfffffff0) | 0x3;
- }
- else {
- /* the last prg generates an interrupt */
- it_prg[i].end.control |= 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;
- #if 0
- printk("%d:%d: %08x-%08x ctrl %08x brch %08x d0 %08x d1 %08xn",n,i,
- virt_to_bus(&(it_prg[i].begin.control)),
- virt_to_bus(&(it_prg[i].end.control)),
- it_prg[i].end.control,
- it_prg[i].end.branchAddress,
- it_prg[i].data[0], it_prg[i].data[1]);
- #endif
- }
- }
- 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];
- 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] = size << 16;
- it_prg[i].end.control = DMA_CTL_OUTPUT_LAST | DMA_CTL_BRANCH;
- if (i < d->nb_cmd-1 && packet_sizes[i+1] != 0) {
- it_prg[i].end.control |= size;
- it_prg[i].begin.branchAddress =
- (virt_to_bus(&(it_prg[i+1].begin.control))
- & 0xfffffff0) | 0x3;
- it_prg[i].end.branchAddress =
- (virt_to_bus(&(it_prg[i+1].begin.control))
- & 0xfffffff0) | 0x3;
- } else {
- /* the last prg generates an interrupt */
- it_prg[i].end.control |= 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 int do_iso_mmap(struct ti_ohci *ohci, struct dma_iso_ctx *d,
- const char *adr, unsigned long size)
- {
- unsigned long start=(unsigned long) adr;
- unsigned long page,pos;
- if (size>d->num_desc * d->buf_size) {
- PRINT(KERN_ERR, ohci->id,
- "iso context %d buf size is different from mmap size",
- d->ctx);
- return -EINVAL;
- }
- if (!d->buf) {
- PRINT(KERN_ERR, ohci->id,
- "iso context %d is not allocated", d->ctx);
- return -EINVAL;
- }
- pos=(unsigned long) d->buf;
- while (size > 0) {
- page = kvirt_to_pa(pos);
- if (remap_page_range(start, page, PAGE_SIZE, PAGE_SHARED))
- return -EAGAIN;
- start+=PAGE_SIZE;
- pos+=PAGE_SIZE;
- size-=PAGE_SIZE;
- }
- return 0;
- }
- static int video1394_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
- {
- struct video_card *video = NULL;
- struct ti_ohci *ohci = NULL;
- unsigned long flags;
- struct list_head *lh;
- spin_lock_irqsave(&video1394_cards_lock, flags);
- if (!list_empty(&video1394_cards)) {
- struct video_card *p;
- list_for_each(lh, &video1394_cards) {
- p = list_entry(lh, struct video_card, list);
- if (p->id == MINOR(inode->i_rdev)) {
- video = p;
- ohci = video->ohci;
- break;
- }
- }
- }
- spin_unlock_irqrestore(&video1394_cards_lock, flags);
- if (video == NULL) {
- PRINT_G(KERN_ERR, __FUNCTION__": Unknown video card for minor %d", MINOR(inode->i_rdev));
- return -EFAULT;
- }
- switch(cmd)
- {
- case VIDEO1394_LISTEN_CHANNEL:
- case VIDEO1394_TALK_CHANNEL:
- {
- struct video1394_mmap v;
- u64 mask;
- int i;
- if(copy_from_user(&v, (void *)arg, sizeof(v)))
- return -EFAULT;
- /* if channel < 0, find lowest available one */
- if (v.channel < 0) {
- mask = (u64)0x1;
- for (i=0; i<ISO_CHANNELS; i++) {
- if (!(ohci->ISO_channel_usage & mask)) {
- v.channel = i;
- PRINT(KERN_INFO, ohci->id, "Found free channel %dn", i);
- break;
- }
- mask = mask << 1;
- }
- }
-
- if (v.channel<0 || v.channel>(ISO_CHANNELS-1)) {
- PRINT(KERN_ERR, ohci->id,
- "Iso channel %d out of bounds", v.channel);
- return -EFAULT;
- }
- mask = (u64)0x1<<v.channel;
- printk("mask: %08X%08X usage: %08X%08Xn",
- (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->id,
- "Channel %d is already taken", v.channel);
- return -EFAULT;
- }
- ohci->ISO_channel_usage |= mask;
-
- if (v.buf_size<=0) {
- PRINT(KERN_ERR, ohci->id,
- "Invalid %d length buffer requested",v.buf_size);
- return -EFAULT;
- }
- if (v.nb_buffers<=0) {
- PRINT(KERN_ERR, ohci->id,
- "Invalid %d buffers requested",v.nb_buffers);
- return -EFAULT;
- }
- if (v.nb_buffers * v.buf_size > VIDEO1394_MAX_SIZE) {
- PRINT(KERN_ERR, ohci->id,
- "%d buffers of size %d bytes is too big",
- v.nb_buffers, v.buf_size);
- return -EFAULT;
- }
- if (cmd == VIDEO1394_LISTEN_CHANNEL) {
- /* find a free iso receive context */
- for (i=0;i<ohci->nb_iso_rcv_ctx-1;i++)
- if (video->ir_context[i]==NULL) break;
-
- if (i==(ohci->nb_iso_rcv_ctx-1)) {
- PRINT(KERN_ERR, ohci->id,
- "No iso context available");
- return -EFAULT;
- }
- video->ir_context[i] =
- alloc_dma_iso_ctx(ohci, ISO_RECEIVE, i+1,
- v.nb_buffers, v.buf_size,
- v.channel, 0);
- if (video->ir_context[i] == NULL) {
- PRINT(KERN_ERR, ohci->id,
- "Couldn't allocate ir context");
- return -EFAULT;
- }
- initialize_dma_ir_ctx(video->ir_context[i],
- v.sync_tag, v.flags);
- video->current_ctx = video->ir_context[i];
- v.buf_size = video->ir_context[i]->buf_size;
- PRINT(KERN_INFO, ohci->id,
- "iso context %d listen on channel %d", i+1,
- v.channel);
- }
- else {
- /* find a free iso transmit context */
- for (i=0;i<ohci->nb_iso_xmit_ctx;i++)
- if (video->it_context[i]==NULL) break;
-
- if (i==ohci->nb_iso_xmit_ctx) {
- PRINT(KERN_ERR, ohci->id,
- "No iso context available");
- return -EFAULT;
- }
-
- video->it_context[i] =
- alloc_dma_iso_ctx(ohci, ISO_TRANSMIT, i,
- v.nb_buffers, v.buf_size,
- v.channel, v.packet_size);
- if (video->it_context[i] == NULL) {
- PRINT(KERN_ERR, ohci->id,
- "Couldn't allocate it context");
- return -EFAULT;
- }
- initialize_dma_it_ctx(video->it_context[i],
- v.sync_tag, v.syt_offset, v.flags);
- video->current_ctx = video->it_context[i];
- v.buf_size = video->it_context[i]->buf_size;
- PRINT(KERN_INFO, ohci->id,
- "Iso context %d talk on channel %d", i,
- v.channel);
- }
- if(copy_to_user((void *)arg, &v, sizeof(v)))
- return -EFAULT;
- return 0;
- }
- case VIDEO1394_UNLISTEN_CHANNEL:
- case VIDEO1394_UNTALK_CHANNEL:
- {
- int channel;
- u64 mask;
- int i;
- if(copy_from_user(&channel, (void *)arg, sizeof(int)))
- return -EFAULT;
- if (channel<0 || channel>(ISO_CHANNELS-1)) {
- PRINT(KERN_ERR, ohci->id,
- "Iso channel %d out of bound", channel);
- return -EFAULT;
- }
- mask = (u64)0x1<<channel;
- if (!(ohci->ISO_channel_usage & mask)) {
- PRINT(KERN_ERR, ohci->id,
- "Channel %d is not being used", channel);
- return -EFAULT;
- }
- ohci->ISO_channel_usage &= ~mask;
- if (cmd == VIDEO1394_UNLISTEN_CHANNEL) {
- i = ir_ctx_listening(video, channel);
- if (i<0) return -EFAULT;
- free_dma_iso_ctx(&video->ir_context[i]);
- PRINT(KERN_INFO, ohci->id,
- "Iso context %d stop listening on channel %d",
- i+1, channel);
- }
- else {
- i = it_ctx_talking(video, channel);
- if (i<0) return -EFAULT;
- free_dma_iso_ctx(&video->it_context[i]);
- PRINT(KERN_INFO, ohci->id,
- "Iso context %d stop talking on channel %d",
- i, channel);
- }
-
- return 0;
- }
- case VIDEO1394_LISTEN_QUEUE_BUFFER:
- {
- struct video1394_wait v;
- struct dma_iso_ctx *d;
- int i;
- if(copy_from_user(&v, (void *)arg, sizeof(v)))
- return -EFAULT;
- i = ir_ctx_listening(video, v.channel);
- if (i<0) return -EFAULT;
- d = video->ir_context[i];
- if ((v.buffer<0) || (v.buffer>d->num_desc)) {
- PRINT(KERN_ERR, ohci->id,
- "Buffer %d out of range",v.buffer);
- return -EFAULT;
- }
-
- spin_lock_irqsave(&d->lock,flags);
- if (d->buffer_status[v.buffer]==VIDEO1394_BUFFER_QUEUED) {
- PRINT(KERN_ERR, ohci->id,
- "Buffer %d is already used",v.buffer);
- spin_unlock_irqrestore(&d->lock,flags);
- return -EFAULT;
- }
-
- d->buffer_status[v.buffer]=VIDEO1394_BUFFER_QUEUED;
- if (d->last_buffer>=0)
- d->ir_prg[d->last_buffer][d->nb_cmd-1].branchAddress =
- (virt_to_bus(&(d->ir_prg[v.buffer][0].control))
- & 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->id, "Starting iso DMA ctx=%d",d->ctx);
- /* Tell the controller where the first program is */
- reg_write(ohci, d->cmdPtr,
- virt_to_bus(&(d->ir_prg[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->id,
- "Waking up iso dma ctx=%d", d->ctx);
- reg_write(ohci, d->ctrlSet, 0x1000);
- }
- }
- return 0;
-
- }
- case VIDEO1394_LISTEN_WAIT_BUFFER:
- case VIDEO1394_LISTEN_POLL_BUFFER:
- {
- struct video1394_wait v;
- struct dma_iso_ctx *d;
- int i;
- if(copy_from_user(&v, (void *)arg, sizeof(v)))
- return -EFAULT;
- i = ir_ctx_listening(video, v.channel);
- if (i<0) return -EFAULT;
- d = video->ir_context[i];
- if ((v.buffer<0) || (v.buffer>d->num_desc)) {
- PRINT(KERN_ERR, ohci->id,
- "Buffer %d out of range",v.buffer);
- return -EFAULT;
- }
- /*
- * 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_LISTEN_POLL_BUFFER) {
- /* for polling, return error code EINTR */
- spin_unlock_irqrestore(&d->lock, flags);
- return -EINTR;
- }
- #if 1
- while(d->buffer_status[v.buffer]!=
- VIDEO1394_BUFFER_READY) {
- spin_unlock_irqrestore(&d->lock, flags);
- interruptible_sleep_on(&d->waitq);
- spin_lock_irqsave(&d->lock, flags);
- if(signal_pending(current)) {
- spin_unlock_irqrestore(&d->lock,flags);
- return -EINTR;
- }
- }
- #else
- if (wait_event_interruptible(d->waitq,
- d->buffer_status[v.buffer]
- == VIDEO1394_BUFFER_READY)
- == -ERESTARTSYS)
- return -EINTR;
- #endif
- d->buffer_status[v.buffer]=VIDEO1394_BUFFER_FREE;
- break;
- default:
- PRINT(KERN_ERR, ohci->id,
- "Buffer %d is not queued",v.buffer);
- spin_unlock_irqrestore(&d->lock, flags);
- return -EFAULT;
- }
- /* set time of buffer */
- v.filltime = d->buffer_time[v.buffer];
- // printk("Buffer %d time %dn", 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((void *)arg, &v, sizeof(v)))
- return -EFAULT;
- return 0;
- }
- case VIDEO1394_TALK_QUEUE_BUFFER:
- {
- struct video1394_wait v;
- struct video1394_queue_variable qv;
- struct dma_iso_ctx *d;
- int i;
- if(copy_from_user(&v, (void *)arg, sizeof(v)))
- return -EFAULT;
- i = it_ctx_talking(video, v.channel);
- if (i<0) return -EFAULT;
- d = video->it_context[i];
- if ((v.buffer<0) || (v.buffer>d->num_desc)) {
- PRINT(KERN_ERR, ohci->id,
- "Buffer %d out of range",v.buffer);
- return -EFAULT;
- }
-
- if (d->flags & VIDEO1394_VARIABLE_PACKET_SIZE) {
- if (copy_from_user(&qv, (void *)arg, sizeof(qv)))
- return -EFAULT;
- if (!access_ok(VERIFY_READ, qv.packet_sizes,
- d->nb_cmd * sizeof(unsigned int))) {
- return -EFAULT;
- }
- }
- spin_lock_irqsave(&d->lock,flags);
- if (d->buffer_status[v.buffer]!=VIDEO1394_BUFFER_FREE) {
- PRINT(KERN_ERR, ohci->id,
- "Buffer %d is already used",v.buffer);
- spin_unlock_irqrestore(&d->lock,flags);
- return -EFAULT;
- }
-
- if (d->flags & VIDEO1394_VARIABLE_PACKET_SIZE) {
- initialize_dma_it_prg_var_packet_queue(
- d, v.buffer, qv.packet_sizes,
- 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 =
- (virt_to_bus(&(d->it_prg[v.buffer][0].begin.control))
- & 0xfffffff0) | 0x3;
- d->it_prg[d->last_buffer]
- [d->last_used_cmd[d->last_buffer]
- ].begin.branchAddress =
- (virt_to_bus(&(d->it_prg[v.buffer][0].begin.control))
- & 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->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,
- virt_to_bus(&(d->it_prg[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->id,
- "Waking up iso transmit dma ctx=%d",
- d->ctx);
- put_timestamp(ohci, d, d->last_buffer);
- reg_write(ohci, d->ctrlSet, 0x1000);
- }
- }
- return 0;
-
- }
- case VIDEO1394_TALK_WAIT_BUFFER:
- {
- struct video1394_wait v;
- struct dma_iso_ctx *d;
- int i;
- if(copy_from_user(&v, (void *)arg, sizeof(v)))
- return -EFAULT;
- i = it_ctx_talking(video, v.channel);
- if (i<0) return -EFAULT;
- d = video->it_context[i];
- if ((v.buffer<0) || (v.buffer>d->num_desc)) {
- PRINT(KERN_ERR, ohci->id,
- "Buffer %d out of range",v.buffer);
- return -EFAULT;
- }
- switch(d->buffer_status[v.buffer]) {
- case VIDEO1394_BUFFER_READY:
- d->buffer_status[v.buffer]=VIDEO1394_BUFFER_FREE;
- return 0;
- case VIDEO1394_BUFFER_QUEUED:
- #if 1
- while(d->buffer_status[v.buffer]!=
- VIDEO1394_BUFFER_READY) {
- interruptible_sleep_on(&d->waitq);
- if(signal_pending(current)) return -EINTR;
- }
- #else
- if (wait_event_interruptible(d->waitq,
- d->buffer_status[v.buffer]
- == VIDEO1394_BUFFER_READY)
- == -ERESTARTSYS)
- return -EINTR;
- #endif
- d->buffer_status[v.buffer]=VIDEO1394_BUFFER_FREE;
- return 0;
- default:
- PRINT(KERN_ERR, ohci->id,
- "Buffer %d is not queued",v.buffer);
- return -EFAULT;
- }
- }
- default:
- return -EINVAL;
- }
- }
- /*
- * This maps the vmalloced and reserved buffer to user space.
- *
- * FIXME:
- * - PAGE_READONLY should suffice!?
- * - remap_page_range is kind of inefficient for page by page remapping.
- * But e.g. pte_alloc() does not work in modules ... :-(
- */
- int video1394_mmap(struct file *file, struct vm_area_struct *vma)
- {
- struct video_card *video = NULL;
- struct ti_ohci *ohci;
- int res = -EINVAL;
- unsigned long flags;
- struct list_head *lh;
- spin_lock_irqsave(&video1394_cards_lock, flags);
- if (!list_empty(&video1394_cards)) {
- struct video_card *p;
- list_for_each(lh, &video1394_cards) {
- p = list_entry(lh, struct video_card, list);
- if (p->id == MINOR(file->f_dentry->d_inode->i_rdev)) {
- video = p;
- break;
- }
- }
- }
- spin_unlock_irqrestore(&video1394_cards_lock, flags);
- if (video == NULL) {
- PRINT_G(KERN_ERR, __FUNCTION__": Unknown video card for minor %d",
- MINOR(file->f_dentry->d_inode->i_rdev));
- return -EFAULT;
- }
- lock_kernel();
- ohci = video->ohci;
- if (video->current_ctx == NULL) {
- PRINT(KERN_ERR, ohci->id, "Current iso context not set");
- } else
- res = do_iso_mmap(ohci, video->current_ctx,
- (char *)vma->vm_start,
- (unsigned long)(vma->vm_end-vma->vm_start));
- unlock_kernel();
- return res;
- }
- static int video1394_open(struct inode *inode, struct file *file)
- {
- int i = MINOR(inode->i_rdev);
- unsigned long flags;
- struct video_card *video = NULL;
- struct list_head *lh;
- spin_lock_irqsave(&video1394_cards_lock, flags);
- if (!list_empty(&video1394_cards)) {
- struct video_card *p;
- list_for_each(lh, &video1394_cards) {
- p = list_entry(lh, struct video_card, list);
- if (p->id == i) {
- video = p;
- break;
- }
- }
- }
- spin_unlock_irqrestore(&video1394_cards_lock, flags);
- if (video == NULL)
- return -EIO;
- V22_COMPAT_MOD_INC_USE_COUNT;
- return 0;
- }
- static int video1394_release(struct inode *inode, struct file *file)
- {
- struct video_card *video = NULL;
- struct ti_ohci *ohci;
- u64 mask;
- int i;
- unsigned long flags;
- struct list_head *lh;
- spin_lock_irqsave(&video1394_cards_lock, flags);
- if (!list_empty(&video1394_cards)) {
- struct video_card *p;
- list_for_each(lh, &video1394_cards) {
- p = list_entry(lh, struct video_card, list);
- if (p->id == MINOR(inode->i_rdev)) {
- video = p;
- break;
- }
- }
- }
- spin_unlock_irqrestore(&video1394_cards_lock, flags);
- if (video == NULL) {
- PRINT_G(KERN_ERR, __FUNCTION__": Unknown device for minor %d",
- MINOR(inode->i_rdev));
- return 1;
- }
- ohci = video->ohci;
- lock_kernel();
- for (i=0;i<ohci->nb_iso_rcv_ctx-1;i++)
- if (video->ir_context[i]) {
- mask = (u64)0x1<<video->ir_context[i]->channel;
- if (!(ohci->ISO_channel_usage & mask))
- PRINT(KERN_ERR, ohci->id,
- "Channel %d is not being used",
- video->ir_context[i]->channel);
- else
- ohci->ISO_channel_usage &= ~mask;
- PRINT(KERN_INFO, ohci->id,
- "Iso receive context %d stop listening "
- "on channel %d", i+1,
- video->ir_context[i]->channel);
- free_dma_iso_ctx(&video->ir_context[i]);
- }
-
- for (i=0;i<ohci->nb_iso_xmit_ctx;i++)
- if (video->it_context[i]) {
- mask = (u64)0x1<<video->it_context[i]->channel;
- if (!(ohci->ISO_channel_usage & mask))
- PRINT(KERN_ERR, ohci->id,
- "Channel %d is not being used",
- video->it_context[i]->channel);
- else
- ohci->ISO_channel_usage &= ~mask;
- PRINT(KERN_INFO, ohci->id,
- "Iso transmit context %d stop talking "
- "on channel %d", i+1,
- video->it_context[i]->channel);
- free_dma_iso_ctx(&video->it_context[i]);
- }
- V22_COMPAT_MOD_DEC_USE_COUNT;
- unlock_kernel();
- return 0;
- }
- static void irq_handler(int card, quadlet_t isoRecvIntEvent,
- quadlet_t isoXmitIntEvent)
- {
- int i;
- unsigned long flags;
- struct video_card *video = NULL;
- struct list_head *lh;
- spin_lock_irqsave(&video1394_cards_lock, flags);
- if (!list_empty(&video1394_cards)) {
- struct video_card *p;
- list_for_each(lh, &video1394_cards) {
- p = list_entry(lh, struct video_card, list);
- if (p->id == card) {
- video = p;
- break;
- }
- }
- }
- spin_unlock_irqrestore(&video1394_cards_lock, flags);
- if (video == NULL) {
- PRINT_G(KERN_ERR, __FUNCTION__": Unknown card number %d!!",
- card);
- return;
- }
-
- DBGMSG(card, "Iso event Recv: %08x Xmit: %08x",
- isoRecvIntEvent, isoXmitIntEvent);
- for (i=0;i<video->ohci->nb_iso_rcv_ctx-1;i++)
- if (isoRecvIntEvent & (1<<(i+1)))
- wakeup_dma_ir_ctx(video->ohci,
- video->ir_context[i]);
- for (i=0;i<video->ohci->nb_iso_xmit_ctx;i++)
- if (isoXmitIntEvent & (1<<i))
- wakeup_dma_it_ctx(video->ohci,
- video->it_context[i]);
- }
- static struct file_operations video1394_fops=
- {
- OWNER_THIS_MODULE
- ioctl: video1394_ioctl,
- mmap: video1394_mmap,
- open: video1394_open,
- release: video1394_release
- };
- static int video1394_init(struct ti_ohci *ohci)
- {
- struct video_card *video = kmalloc(sizeof(struct video_card), GFP_KERNEL);
- unsigned long flags;
- char name[16];
- if (video == NULL) {
- PRINT(KERN_ERR, ohci->id, "Cannot allocate video_card");
- return -1;
- }
- memset(video, 0, sizeof(struct video_card));
- spin_lock_irqsave(&video1394_cards_lock, flags);
- INIT_LIST_HEAD(&video->list);
- list_add_tail(&video->list, &video1394_cards);
- spin_unlock_irqrestore(&video1394_cards_lock, flags);
- if (ohci1394_register_video(ohci, &video_tmpl)<0) {
- PRINT(KERN_ERR, ohci->id, "Register_video failed");
- return -1;
- }
- video->id = ohci->id;
- video->ohci = ohci;
- /* Iso receive dma contexts */
- video->ir_context = (struct dma_iso_ctx **)
- kmalloc((ohci->nb_iso_rcv_ctx-1)*
- sizeof(struct dma_iso_ctx *), GFP_KERNEL);
- if (video->ir_context)
- memset(video->ir_context, 0,
- (ohci->nb_iso_rcv_ctx-1)*sizeof(struct dma_iso_ctx *));
- else {
- PRINT(KERN_ERR, ohci->id, "Cannot allocate ir_context");
- return -1;
- }
- /* Iso transmit dma contexts */
- video->it_context = (struct dma_iso_ctx **)
- kmalloc(ohci->nb_iso_xmit_ctx *
- sizeof(struct dma_iso_ctx *), GFP_KERNEL);
- if (video->it_context)
- memset(video->it_context, 0,
- ohci->nb_iso_xmit_ctx * sizeof(struct dma_iso_ctx *));
- else {
- PRINT(KERN_ERR, ohci->id, "Cannot allocate it_context");
- return -1;
- }
- sprintf(name, "%d", video->id);
- video->devfs = devfs_register(devfs_handle, name,
- DEVFS_FL_AUTO_OWNER,
- VIDEO1394_MAJOR, 0,
- S_IFCHR | S_IRUSR | S_IWUSR,
- &video1394_fops, NULL);
- return 0;
- }
- /* Must be called under spinlock */
- static void remove_card(struct video_card *video)
- {
- int i;
- ohci1394_unregister_video(video->ohci, &video_tmpl);
- devfs_unregister(video->devfs);
- /* Free the iso receive contexts */
- if (video->ir_context) {
- for (i=0;i<video->ohci->nb_iso_rcv_ctx-1;i++) {
- free_dma_iso_ctx(&video->ir_context[i]);
- }
- kfree(video->ir_context);
- }
- /* Free the iso transmit contexts */
- if (video->it_context) {
- for (i=0;i<video->ohci->nb_iso_xmit_ctx;i++) {
- free_dma_iso_ctx(&video->it_context[i]);
- }
- kfree(video->it_context);
- }
- list_del(&video->list);
- kfree(video);
- }
- static void video1394_remove_host (struct hpsb_host *host)
- {
- struct ti_ohci *ohci;
- unsigned long flags;
- struct list_head *lh, *next;
- struct video_card *p;
- /* We only work with the OHCI-1394 driver */
- if (strcmp(host->template->name, OHCI1394_DRIVER_NAME))
- return;
- ohci = (struct ti_ohci *)host->hostdata;
- spin_lock_irqsave(&video1394_cards_lock, flags);
- list_for_each_safe(lh, next, &video1394_cards) {
- p = list_entry(lh, struct video_card, list);
- if (p->ohci == ohci) {
- remove_card(p);
- break;
- }
- }
- spin_unlock_irqrestore(&video1394_cards_lock, flags);
- return;
- }
- static void video1394_add_host (struct hpsb_host *host)
- {
- struct ti_ohci *ohci;
- /* We only work with the OHCI-1394 driver */
- if (strcmp(host->template->name, OHCI1394_DRIVER_NAME))
- return;
- ohci = (struct ti_ohci *)host->hostdata;
- video1394_init(ohci);
-
- return;
- }
- static struct hpsb_highlevel_ops hl_ops = {
- 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");
- static void __exit video1394_exit_module (void)
- {
- hpsb_unregister_highlevel (hl_handle);
- devfs_unregister(devfs_handle);
- devfs_unregister_chrdev(VIDEO1394_MAJOR, VIDEO1394_DRIVER_NAME);
- PRINT_G(KERN_INFO, "Removed " VIDEO1394_DRIVER_NAME " module");
- }
- static int __init video1394_init_module (void)
- {
- if (devfs_register_chrdev(VIDEO1394_MAJOR, VIDEO1394_DRIVER_NAME,
- &video1394_fops)) {
- PRINT_G(KERN_ERR, "video1394: unable to get major %dn",
- VIDEO1394_MAJOR);
- return -EIO;
- }
- #if LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0)
- devfs_handle = devfs_mk_dir(NULL, VIDEO1394_DRIVER_NAME,
- strlen(VIDEO1394_DRIVER_NAME), NULL);
- #else
- devfs_handle = devfs_mk_dir(NULL, VIDEO1394_DRIVER_NAME, NULL);
- #endif
- hl_handle = hpsb_register_highlevel (VIDEO1394_DRIVER_NAME, &hl_ops);
- if (hl_handle == NULL) {
- PRINT_G(KERN_ERR, "No more memory for drivern");
- devfs_unregister(devfs_handle);
- devfs_unregister_chrdev(VIDEO1394_MAJOR, VIDEO1394_DRIVER_NAME);
- return -ENOMEM;
- }
- PRINT_G(KERN_INFO, "Installed " VIDEO1394_DRIVER_NAME " module");
- return 0;
- }
- module_init(video1394_init_module);
- module_exit(video1394_exit_module);