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linux/drivers/ieee1394/video1394.c
Arjan van de Ven 2b8693c061 [PATCH] mark struct file_operations const 3 
Many struct file_operations in the kernel can be "const".  Marking them const
moves these to the .rodata section, which avoids false sharing with potential
dirty data.  In addition it'll catch accidental writes at compile time to
these shared resources.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-12 09:48:45 -08:00

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/*
* 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.
*
* NOTES:
*
* ioctl return codes:
* EFAULT is only for invalid address for the argp
* EINVAL for out of range values
* EBUSY when trying to use an already used resource
* ESRCH when trying to free/stop a not used resource
* EAGAIN for resource allocation failure that could perhaps succeed later
* ENOTTY for unsupported ioctl request
*
*/
#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 <linux/delay.h>
#include <linux/bitops.h>
#include <linux/types.h>
#include <linux/vmalloc.h>
#include <linux/timex.h>
#include <linux/mm.h>
#include <linux/compat.h>
#include <linux/cdev.h>
#include "dma.h"
#include "highlevel.h"
#include "hosts.h"
#include "ieee1394.h"
#include "ieee1394_core.h"
#include "ieee1394_hotplug.h"
#include "ieee1394_types.h"
#include "nodemgr.h"
#include "ohci1394.h"
#include "video1394.h"
#define ISO_CHANNELS 64
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 type; /* OHCI_ISO_TRANSMIT or OHCI_ISO_RECEIVE */
struct ohci1394_iso_tasklet iso_tasklet;
int channel;
int ctx;
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;
struct dma_region dma;
struct dma_prog_region *prg_reg;
struct dma_cmd **ir_prg;
struct it_dma_prg **it_prg;
unsigned int *buffer_status;
unsigned int *buffer_prg_assignment;
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 list_head link;
};
struct file_ctx {
struct ti_ohci *ohci;
struct list_head context_list;
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...) do {} while (0)
#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 wakeup_dma_ir_ctx(unsigned long l);
static void wakeup_dma_it_ctx(unsigned long l);
static struct hpsb_highlevel video1394_highlevel;
static int free_dma_iso_ctx(struct dma_iso_ctx *d)
{
int i;
DBGMSG(d->ohci->host->id, "Freeing dma_iso_ctx %d", d->ctx);
ohci1394_stop_context(d->ohci, d->ctrlClear, NULL);
if (d->iso_tasklet.link.next != NULL)
ohci1394_unregister_iso_tasklet(d->ohci, &d->iso_tasklet);
dma_region_free(&d->dma);
if (d->prg_reg) {
for (i = 0; i < d->num_desc; i++)
dma_prog_region_free(&d->prg_reg[i]);
kfree(d->prg_reg);
}
kfree(d->ir_prg);
kfree(d->it_prg);
kfree(d->buffer_status);
kfree(d->buffer_prg_assignment);
kfree(d->buffer_time);
kfree(d->last_used_cmd);
kfree(d->next_buffer);
list_del(&d->link);
kfree(d);
return 0;
}
static struct dma_iso_ctx *
alloc_dma_iso_ctx(struct ti_ohci *ohci, int type, int num_desc,
int buf_size, int channel, unsigned int packet_size)
{
struct dma_iso_ctx *d;
int i;
d = kzalloc(sizeof(*d), GFP_KERNEL);
if (!d) {
PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma_iso_ctx");
return NULL;
}
d->ohci = ohci;
d->type = type;
d->channel = channel;
d->num_desc = num_desc;
d->frame_size = buf_size;
d->buf_size = PAGE_ALIGN(buf_size);
d->last_buffer = -1;
INIT_LIST_HEAD(&d->link);
init_waitqueue_head(&d->waitq);
/* Init the regions for easy cleanup */
dma_region_init(&d->dma);
if (dma_region_alloc(&d->dma, (d->num_desc - 1) * d->buf_size, ohci->dev,
PCI_DMA_BIDIRECTIONAL)) {
PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma buffer");
free_dma_iso_ctx(d);
return NULL;
}
if (type == OHCI_ISO_RECEIVE)
ohci1394_init_iso_tasklet(&d->iso_tasklet, type,
wakeup_dma_ir_ctx,
(unsigned long) d);
else
ohci1394_init_iso_tasklet(&d->iso_tasklet, type,
wakeup_dma_it_ctx,
(unsigned long) d);
if (ohci1394_register_iso_tasklet(ohci, &d->iso_tasklet) < 0) {
PRINT(KERN_ERR, ohci->host->id, "no free iso %s contexts",
type == OHCI_ISO_RECEIVE ? "receive" : "transmit");
free_dma_iso_ctx(d);
return NULL;
}
d->ctx = d->iso_tasklet.context;
d->prg_reg = kmalloc(d->num_desc * sizeof(*d->prg_reg), GFP_KERNEL);
if (!d->prg_reg) {
PRINT(KERN_ERR, ohci->host->id, "Failed to allocate ir prg regs");
free_dma_iso_ctx(d);
return NULL;
}
/* Makes for easier cleanup */
for (i = 0; i < d->num_desc; i++)
dma_prog_region_init(&d->prg_reg[i]);
if (type == OHCI_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 = kzalloc(d->num_desc * sizeof(*d->ir_prg),
GFP_KERNEL);
if (!d->ir_prg) {
PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma ir prg");
free_dma_iso_ctx(d);
return NULL;
}
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++) {
if (dma_prog_region_alloc(&d->prg_reg[i], d->nb_cmd *
sizeof(struct dma_cmd), ohci->dev)) {
PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma ir prg");
free_dma_iso_ctx(d);
return NULL;
}
d->ir_prg[i] = (struct dma_cmd *)d->prg_reg[i].kvirt;
}
} else { /* OHCI_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 = kzalloc(d->num_desc * sizeof(*d->it_prg),
GFP_KERNEL);
if (!d->it_prg) {
PRINT(KERN_ERR, ohci->host->id,
"Failed to allocate dma it prg");
free_dma_iso_ctx(d);
return NULL;
}
d->packet_size = packet_size;
if (PAGE_SIZE % packet_size || packet_size>4096) {
PRINT(KERN_ERR, ohci->host->id,
"Packet size %d (page_size: %ld) "
"not yet supported\n",
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++) {
if (dma_prog_region_alloc(&d->prg_reg[i], d->nb_cmd *
sizeof(struct it_dma_prg), ohci->dev)) {
PRINT(KERN_ERR, ohci->host->id, "Failed to allocate dma it prg");
free_dma_iso_ctx(d);
return NULL;
}
d->it_prg[i] = (struct it_dma_prg *)d->prg_reg[i].kvirt;
}
}
d->buffer_status =
kzalloc(d->num_desc * sizeof(*d->buffer_status), GFP_KERNEL);
d->buffer_prg_assignment =
kzalloc(d->num_desc * sizeof(*d->buffer_prg_assignment), GFP_KERNEL);
d->buffer_time =
kzalloc(d->num_desc * sizeof(*d->buffer_time), GFP_KERNEL);
d->last_used_cmd =
kzalloc(d->num_desc * sizeof(*d->last_used_cmd), GFP_KERNEL);
d->next_buffer =
kzalloc(d->num_desc * sizeof(*d->next_buffer), GFP_KERNEL);
if (!d->buffer_status || !d->buffer_prg_assignment || !d->buffer_time ||
!d->last_used_cmd || !d->next_buffer) {
PRINT(KERN_ERR, ohci->host->id,
"Failed to allocate dma_iso_ctx member");
free_dma_iso_ctx(d);
return NULL;
}
spin_lock_init(&d->lock);
DBGMSG(ohci->host->id, "Iso %s DMA: %d buffers "
"of size %d allocated for a frame size %d, each with %d prgs",
(type == OHCI_ISO_RECEIVE) ? "receive" : "transmit",
d->num_desc - 1, 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 = cpu_to_le32(4);
d->ir_prg[n][1].status = cpu_to_le32(PAGE_SIZE-4);
for (i = 2; i < d->nb_cmd - 1; i++)
d->ir_prg[n][i].status = cpu_to_le32(PAGE_SIZE);
d->ir_prg[n][i].status = cpu_to_le32(d->left_size);
}
static void reprogram_dma_ir_prg(struct dma_iso_ctx *d, int n, int buffer, int flags)
{
struct dma_cmd *ir_prg = d->ir_prg[n];
unsigned long buf = (unsigned long)d->dma.kvirt + buffer * d->buf_size;
int i;
d->buffer_prg_assignment[n] = buffer;
ir_prg[0].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma, buf -
(unsigned long)d->dma.kvirt));
ir_prg[1].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
(buf + 4) - (unsigned long)d->dma.kvirt));
for (i=2;i<d->nb_cmd-1;i++) {
ir_prg[i].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
(buf+(i-1)*PAGE_SIZE) -
(unsigned long)d->dma.kvirt));
}
ir_prg[i].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
DMA_CTL_IRQ | DMA_CTL_BRANCH | d->left_size);
ir_prg[i].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
(buf+(i-1)*PAGE_SIZE) - (unsigned long)d->dma.kvirt));
}
static void initialize_dma_ir_prg(struct dma_iso_ctx *d, int n, int flags)
{
struct dma_cmd *ir_prg = d->ir_prg[n];
struct dma_prog_region *ir_reg = &d->prg_reg[n];
unsigned long buf = (unsigned long)d->dma.kvirt;
int i;
/* the first descriptor will read only 4 bytes */
ir_prg[0].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
DMA_CTL_BRANCH | 4);
/* set the sync flag */
if (flags & VIDEO1394_SYNC_FRAMES)
ir_prg[0].control |= cpu_to_le32(DMA_CTL_WAIT);
ir_prg[0].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma, buf -
(unsigned long)d->dma.kvirt));
ir_prg[0].branchAddress = cpu_to_le32((dma_prog_region_offset_to_bus(ir_reg,
1 * sizeof(struct dma_cmd)) & 0xfffffff0) | 0x1);
/* If there is *not* only one DMA page per frame (hence, d->nb_cmd==2) */
if (d->nb_cmd > 2) {
/* The second descriptor will read PAGE_SIZE-4 bytes */
ir_prg[1].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
DMA_CTL_BRANCH | (PAGE_SIZE-4));
ir_prg[1].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma, (buf + 4) -
(unsigned long)d->dma.kvirt));
ir_prg[1].branchAddress = cpu_to_le32((dma_prog_region_offset_to_bus(ir_reg,
2 * sizeof(struct dma_cmd)) & 0xfffffff0) | 0x1);
for (i = 2; i < d->nb_cmd - 1; i++) {
ir_prg[i].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
DMA_CTL_BRANCH | PAGE_SIZE);
ir_prg[i].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
(buf+(i-1)*PAGE_SIZE) -
(unsigned long)d->dma.kvirt));
ir_prg[i].branchAddress =
cpu_to_le32((dma_prog_region_offset_to_bus(ir_reg,
(i + 1) * sizeof(struct dma_cmd)) & 0xfffffff0) | 0x1);
}
/* The last descriptor will generate an interrupt */
ir_prg[i].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
DMA_CTL_IRQ | DMA_CTL_BRANCH | d->left_size);
ir_prg[i].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
(buf+(i-1)*PAGE_SIZE) -
(unsigned long)d->dma.kvirt));
} else {
/* Only one DMA page is used. Read d->left_size immediately and */
/* generate an interrupt as this is also the last page. */
ir_prg[1].control = cpu_to_le32(DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE |
DMA_CTL_IRQ | DMA_CTL_BRANCH | (d->left_size-4));
ir_prg[1].address = cpu_to_le32(dma_region_offset_to_bus(&d->dma,
(buf + 4) - (unsigned long)d->dma.kvirt));
}
}
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[d->buffer_prg_assignment[i]] = VIDEO1394_BUFFER_READY;
do_gettimeofday(&d->buffer_time[d->buffer_prg_assignment[i]]);
dma_region_sync_for_cpu(&d->dma,
d->buffer_prg_assignment[i] * d->buf_size,
d->buf_size);
}
}
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[d->buffer_prg_assignment[i]] = VIDEO1394_BUFFER_READY;
}
}
spin_unlock(&d->lock);
if (waitqueue_active(&d->waitq))
wake_up_interruptible(&d->waitq);
}
static void reprogram_dma_it_prg(struct dma_iso_ctx *d, int n, int buffer)
{
struct it_dma_prg *it_prg = d->it_prg[n];
unsigned long buf = (unsigned long)d->dma.kvirt + buffer * d->buf_size;
int i;
d->buffer_prg_assignment[n] = buffer;
for (i=0;i<d->nb_cmd;i++) {
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));
}
}
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;
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 long 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;
}
DBGMSG(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 + 1, 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);
DBGMSG(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 + 1, 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);
DBGMSG(ohci->host->id,
"Iso context %d talk on channel %d", d->ctx,
v.channel);
}
if (copy_to_user(argp, &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;
DBGMSG(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;
int next_prg;
if (unlikely(copy_from_user(&v, argp, sizeof(v))))
return -EFAULT;
d = find_ctx(&ctx->context_list, OHCI_ISO_RECEIVE, v.channel);
if (unlikely(d == NULL))
return -EFAULT;
if (unlikely((v.buffer<0) || (v.buffer>=d->num_desc - 1))) {
PRINT(KERN_ERR, ohci->host->id,
"Buffer %d out of range",v.buffer);
return -EINVAL;
}
spin_lock_irqsave(&d->lock,flags);
if (unlikely(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;
next_prg = (d->last_buffer + 1) % d->num_desc;
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[next_prg], 0)
& 0xfffffff0) | 0x1);
d->last_buffer = next_prg;
reprogram_dma_ir_prg(d, d->last_buffer, v.buffer, d->flags);
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[d->last_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)) {
DBGMSG(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 = 0;
if (unlikely(copy_from_user(&v, argp, sizeof(v))))
return -EFAULT;
d = find_ctx(&ctx->context_list, OHCI_ISO_RECEIVE, v.channel);
if (unlikely(d == NULL))
return -EFAULT;
if (unlikely((v.buffer<0) || (v.buffer>d->num_desc - 1))) {
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];
/*
* Look ahead to see how many more buffers have been received
*/
i=0;
while (d->buffer_status[(v.buffer+1)%(d->num_desc - 1)]==
VIDEO1394_BUFFER_READY) {
v.buffer=(v.buffer+1)%(d->num_desc - 1);
i++;
}
spin_unlock_irqrestore(&d->lock, flags);
v.buffer=i;
if (unlikely(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;
int next_prg;
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 - 1)) {
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(*psizes);
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);
/* last_buffer is last_prg */
next_prg = (d->last_buffer + 1) % d->num_desc;
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);
kfree(psizes);
return -EBUSY;
}
if (d->flags & VIDEO1394_VARIABLE_PACKET_SIZE) {
initialize_dma_it_prg_var_packet_queue(
d, next_prg, 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[next_prg],
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[next_prg],
0) & 0xfffffff0) | 0x3);
d->next_buffer[d->last_buffer] = (v.buffer + 1) % (d->num_desc - 1);
}
d->last_buffer = next_prg;
reprogram_dma_it_prg(d, 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);
dma_region_sync_for_device(&d->dma,
v.buffer * d->buf_size, d->buf_size);
/* Tell the controller where the first program is */
reg_write(ohci, d->cmdPtr,
dma_prog_region_offset_to_bus(&d->prg_reg[next_prg], 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)) {
DBGMSG(ohci->host->id,
"Waking up iso transmit dma ctx=%d",
d->ctx);
put_timestamp(ohci, d, d->last_buffer);
dma_region_sync_for_device(&d->dma,
v.buffer * d->buf_size, d->buf_size);
reg_write(ohci, d->ctrlSet, 0x1000);
}
}
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-1)) {
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;
}
}
/*
* 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;
if (ctx->current_ctx == NULL) {
PRINT(KERN_ERR, ctx->ohci->host->id,
"Current iso context not set");
return -EINVAL;
}
return dma_region_mmap(&ctx->current_ctx->dma, file, vma);
}
static unsigned int video1394_poll(struct file *file, poll_table *pt)
{
struct file_ctx *ctx;
unsigned int mask = 0;
unsigned long flags;
struct dma_iso_ctx *d;
int i;
ctx = file->private_data;
d = ctx->current_ctx;
if (d == NULL) {
PRINT(KERN_ERR, ctx->ohci->host->id,
"Current iso context not set");
return POLLERR;
}
poll_wait(file, &d->waitq, pt);
spin_lock_irqsave(&d->lock, flags);
for (i = 0; i < d->num_desc; i++) {
if (d->buffer_status[i] == VIDEO1394_BUFFER_READY) {
mask |= POLLIN | POLLRDNORM;
break;
}
}
spin_unlock_irqrestore(&d->lock, flags);
return mask;
}
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 = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx) {
PRINT(KERN_ERR, ohci->host->id, "Cannot malloc file_ctx");
return -ENOMEM;
}
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;
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;
DBGMSG(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;
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 const struct file_operations video1394_fops=
{
.owner = THIS_MODULE,
.unlocked_ioctl = video1394_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = video1394_compat_ioctl,
#endif
.poll = video1394_poll,
.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 = VIDEO1394_DRIVER_NAME,
.id_table = video1394_id_table,
};
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_device_create(hpsb_protocol_class, NULL, MKDEV(
IEEE1394_MAJOR, minor),
NULL, "%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_device_destroy(hpsb_protocol_class, MKDEV(IEEE1394_MAJOR,
IEEE1394_MINOR_BLOCK_VIDEO1394 * 16 + 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);
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;
}
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);
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);
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